Modifier list

A modifier is a value that affects various attributes of a country or province.

Overview

All modifiers are sorted into one of two internal scopes: country and province. Adding country modifiers to a province scope will not work, and vice versa.

Additionally, there is a unique type of country modifier called the rule modifier. These activate features such as Exploration when applied. Do note, however, most rule modifiers can only be applied in a specific context, i.e. can_bypass_forts can only be used in the Ages file.

All modifiers stack additively. For example, if you apply infantry_cost = 0.1 and then apply infantry_cost = 0.3, the country will have infantry_cost = 0.4.

However, the effect the modifier value has on its base value can be additive or multiplicative. For example: army_tradition = 1 adds the value to the base Army Tradition, whereas infantry_cost = 0.1 multiplies the base value by the modifier value.

The following examples are mostly positive(green text in game) effects.

Country modifiers

Military

Modifier	Example	Description	Effect type	Version added
army_tradition	army_tradition = 1	Adds to the rate of army tradition gained each year.	Additive	1.1
army_tradition_decay	army_tradition_decay = -0.01	Adds to the decay rate of army tradition.	Additive	1.1
army_tradition_from_battle	army_tradition_from_battle = 0.01	Modifies the army tradition bonus when gained through battles.	Multiplicative	1.18
yearly_army_professionalism	yearly_army_professionalism = 0.01	Modifies the rate of army professionalism gained each year.	Multiplicative	1.23
drill_gain_modifier	drill_gain_modifier = 0.10	Modifies the army drill gains while drilling	Multiplicative	1.23
drill_decay_modifier	drill_decay_modifier = -0.10	Modifies the army drill decay rate per year.	Multiplicative	1.24
infantry_cost	infantry_cost = -0.10	Modifies the base cost of infantry units.	Multiplicative	1.1
infantry_power	infantry_power = 0.10	Modifies the power infantry gain from unit pips.	Multiplicative	1.1
infantry_fire	infantry_fire = 1	added to infanty fire modifier, a pure multiplier to infantry damage during fire phase	Additive	1.28
infantry_shock	infantry_shock = 1	added to infanty shock modifier, a pure multiplier to infantry damage during shock phase	Additive	1.28
cavalry_cost	cavalry_cost = -0.10	Modifies the base cost of cavalry units.	Multiplicative	1.1
cavalry_power	cavalry_power = 0.10	Modifies the power cavalry gain from unit pips.	Multiplicative	1.1
cavalry_fire	cavalry_fire = 1	added to cavalry fire modifier, a pure multiplier to cavalry damage during fire phase	Additive	1.28
cavalry_shock	cavalry_shock = 1	added to cavalry shock modifier, a pure multiplier to cavalry damage during shock phase	Additive	1.28
artillery_cost	artillery_cost = -0.10	Modifies the base cost of artillery units.	Multiplicative	1.1
artillery_power	artillery_power = 0.10	Modifies the power artillery gain from unit pips.	Multiplicative	1.1
artillery_fire	artillery_fire = 1	added to artillery fire modifier, a pure multiplier to artillery damage during fire phase, also for ship cannons	Additive	1.28
artillery_shock	artillery_shock = 1	added to artillery shock modifier, a pure multiplier to artillery damage during shock phase	Additive	1.28
cav_to_inf_ratio	cav_to_inf_ratio = 0.10	Adds to the ratio required to negate the insufficient support penalty.	Additive	1.20
cavalry_flanking	cavalry_flanking = 0.10	Modifies the effectiveness of cavalry flanking.	Multiplicative	1.18
artillery_bonus_vs_fort	artillery_bonus_vs_fort = 1	Adds to the bonus artillery get versus forts.	Additive	1.20
backrow_artillery_damage	backrow_artillery_damage = 0.10	Modifies the bonus damage artillery inflict when in the backrow during combat.	Multiplicative	1.20
discipline	discipline = 0.01	Modifies the discipline of land units.	Multiplicative	1.1
mercenary_discipline	mercenary_discipline = 0.10	Modifies the discipline of mercenary units.	Multiplicative	1.20
land_morale	land_morale = 0.10	Modifies the land morale of land units.	Multiplicative	1.1
defensiveness	defensiveness = 0.10	Modifies the siege defensiveness that affects siege phase length.	Multiplicative	1.1
siege_ability	siege_ability = 0.10	Modifies the siege ability that affects siege phase length. Reverse concept of defensiveness.	Multiplicative	1.6
movement_speed	movement_speed = 0.10	Modifies the base movement speed for all land units.	Multiplicative	1.18
fire_damage	fire_damage = 0.10	Modifies the fire damage done by land units.	Multiplicative	1.18
fire_damage_received	fire_damage_received = -0.10	Modifies the fire damage taken by land units.	Multiplicative	1.18
shock_damage	shock_damage = 0.10	Modifies the shock damage done by land units.	Multiplicative	1.18
shock_damage_received	shock_damage_received = -0.10	Modifies the shock damage taken by land units.	Multiplicative	1.18
recover_army_morale_speed	recover_army_morale_speed = 0.10	Modifies the army morale recovery speed.	Multiplicative	1.1
siege_blockade_progress	siege_blockade_progress = 1	Modifies the bonus siege status by blockaded.	Additive	1.20
reserves_organisation	reserves_organisation = 0.10	Modifies the morale damage taken by units in reserves (i.e. not in battle, but engaged with another unit)	Multiplicative	1.23
land_attrition	land_attrition = -0.10	Modifies the attrition taken by land units.	Multiplicative	1.1
reinforce_cost_modifier	reinforce_cost_modifier = -0.10	Modifies the cost of reinforcements when units are reinforced.	Multiplicative	1.19
reinforce_speed	reinforce_speed = 0.10	Modifies the rate at which units are reinforced with new men.	Multiplicative	1.1
manpower_recovery_speed	manpower_recovery_speed = 0.10	Modifies the rate at which manpower is recovered.	Multiplicative	1.1
global_manpower	global_manpower = 1	Adds to the country's total manpower pool. 1 equals 1000 men.	Additive	1.1
global_manpower_modifier	global_manpower_modifier = 0.10	Modifies a country's total manpower pool.	Multiplicative	1.1
global_regiment_cost	global_regiment_cost = -0.10	Modifies the base unit cost for all land units.	Multiplicative	1.1
global_regiment_recruit_speed	global_regiment_recruit_speed = -0.10	Modifies the base speed at which land units are recruited.	Multiplicative	1.1
global_supply_limit_modifier	global_supply_limit_modifier = 0.10	Modifies the supply limit of provinces	Additive	1.28
land_forcelimit	land_forcelimit = 1	Adds to a country's force limit.	Additive	1.1
land_forcelimit_modifier	land_forcelimit_modifier = 0.10	Modifies a country's force limit.	Multiplicative	1.1
land_maintenance_modifier	land_maintenance_modifier = -0.10	Modifies the maintenance cost of all land units.	Multiplicative	1.1
mercenary_cost	mercenary_cost = -0.10	Modifies the base cost for mercenary units.	Multiplicative	1.1
merc_maintenance_modifier	merc_maintenance_modifier = -0.10	Modifies the maintenance cost of all mercenary units.	Multiplicative	1.1
possible_condottieri	possible_condottieri = 1	Modifies the base condottieri limit.	Multiplicative	1.16
hostile_attrition	hostile_attrition = 1	Adds to the attrition enemies take in a country's provinces.	Additive	1.1
garrison_size	garrison_size = 0.10	Modifies the base garrison size in provinces.	Multiplicative	1.12
global_garrison_growth	global_garrison_growth = 0.10	Modifies the base garrison growth in provinces.	Multiplicative	1.1
fort_maintenance_modifier	fort_maintenance_modifier = -0.10	Modifies the base fort maintenance cost.	Multiplicative	1.12
rival_border_fort_maintenance	rival_border_fort_maintenance = -0.10	Modifies the base fort maintenance cost for forts in provinces that border rivals.	Multiplicative	1.20
war_exhaustion	war_exhaustion = -0.10	Adds to the monthly war exhaustion rate.	Additive	1.1
war_exhaustion_cost	war_exhaustion_cost = -0.10	Modifies the diplomatic power cost for reducing war exhaustion.	Multiplicative	1.1
leader_land_fire	leader_land_fire = 1	Adds to the minimum fire pip count a leader can be generated with.	Additive	1.6
leader_land_manuever	leader_land_manuever = 1	Adds to the minimum maneuver pip count a leader can be generated with.	Additive	1.6
leader_land_shock	leader_land_shock = 1	Adds to the minimum shock pip count a leader can be generated with.	Additive	1.6
leader_siege	leader_siege = 1	Adds to the minimum siege pip count a leader can be generated with.	Additive	1.6
general_cost	general_cost = -0.10	Modifies the base military power cost for recruiting Generals.	Multiplicative	1.23
free_leader_pool	free_leader_pool = 1	Adds to the maximum amount of free leaders.	Additive	1.1
raze_power_gain	raze_power_gain = 0.10	Modifies the amount of monarch power gained from razing.	Multiplicative	1.14
loot_amount	loot_amount = 0.10	Modifies the amount of loot taken at once during looting.	Multiplicative	1.12
available_province_loot	available_province_loot = 0.10	Modifies the amount of loot available in a province.	Multiplicative	1.30
prestige_from_land	prestige_from_land = 0.10	Modifies the prestige bonus from combat.	Multiplicative	1.11
amount_of_banners	amount_of_banners = 0.10	Modifies the maximum amount of banners available.	Multiplicative	1.20
war_taxes_cost_modifier	war_taxes_cost_modifier = -0.10	Modifies the military power cost for raising war taxes.	Multiplicative	1.20
leader_cost	leader_cost = -0.10	Modifies the military power cost for hiring leaders.	Multiplicative	1.26
may_recruit_female_generals	may_recruit_female_generals = yes	Allows the recruitment of female generals.	Constant	1.11(Only usable in ideas or religions before 1.30)
special_unit_forcelimit	special_unit_forcelimit= 0.10	Modifies the allowed forcelimit of special units such as Rajput regiments, etc.	Multiplicative	1.30
manpower_in_true_faith_provinces	manpower_in_true_faith_provinces= 0.10	Modifies the amount of manpower gained from provinces that follow the true faith of a country.	Multiplicative	1.30
mercenary_manpower	mercenary_manpower= 0.10	Modifies the amount of manpower mercenary companies have.	Multiplicative	1.30

Navy

Modifier	Example	Description	Effect type	Version added
navy_tradition	navy_tradition = 1	Adds to the yearly navy tradition rate.	Additive	1.1
navy_tradition_decay	navy_tradition_decay = -0.01	Adds to the decay rate of navy tradition.	Additive	1.1
naval_tradition_from_battle	naval_tradition_from_battle = 0.1	Modifies the base navy tradition gained from battles.	Multiplicative	1.18
naval_tradition_from_trade	naval_tradition_from_trade = 0.1	Modifies the base navy tradition gained from protecting trade.	Multiplicative	1.28
heavy_ship_cost	heavy_ship_cost = -0.1	Modifies the base cost of heavy ships.	Multiplicative	1.1
heavy_ship_power	heavy_ship_power = 0.1	Modifies the power heavy ships gain from unit pips.	Multiplicative	1.1
light_ship_cost	light_ship_cost = -0.1	Modifies the base cost of light ships.	Multiplicative	1.1
light_ship_power	light_ship_power = 0.1	Modifies the power light ships gain from unit pips.	Multiplicative	1.1
galley_cost	galley_cost = -0.1	Modifies the base cost of galley ships.	Multiplicative	1.1
galley_power	galley_power = 0.1	Modifies the power galley ships gain from unit pips.	Multiplicative	1.1
transport_cost	transport_cost = -0.1	Modifies the base cost of transport ships.	Multiplicative	1.1
transport_power	transport_power = 0.1	Modifies the power transport ships gain from unit pips.	Multiplicative	1.1
global_ship_cost	global_ship_cost = -0.1	Modifies the base cost of all ships.	Multiplicative	1.1
global_ship_recruit_speed	global_ship_recruit_speed = -0.1	Modifies the base recruitmend speed of all ships.	Multiplicative	1.1
global_ship_repair	global_ship_repair = 0.1	Modifies the base repair speed (in port) of all ships.	Multiplicative	1.7
naval_forcelimit	naval_forcelimit = 1	Adds to a country's naval force limit.	Additive	1.1
naval_forcelimit_modifier	naval_forcelimit_modifier = 0.1	Modifies a country's naval force limit.	Multiplicative	1.1
naval_maintenance_modifier	naval_maintenance_modifier = -0.1	Modifies the naval maintenance for all ships.	Multiplicative	1.1
global_sailors	global_sailors = 1000	Adds to a country's maximum sailor pool.	Additive	1.1
global_sailors_modifier	global_sailors_modifier = 0.1	Modifies a country's maximum sailor pool.	Multiplicative	1.16
sailor_maintenance_modifer	sailor_maintenance_modifer = -0.1	Modifies the sailor maintenance for all ships.	Multiplicative	1.16
sailors_recovery_speed	sailors_recovery_speed = 0.1	Modifies the sailor recovery rate for all ships.	Multiplicative	1.16
blockade_efficiency	blockade_efficiency = 0.1	Modifies the efficiency of blockades against enemies.	Multiplicative	1.1
capture_ship_chance	capture_ship_chance = 0.1	Adds to the chance for ship capture during naval battles.	Additive	1.18
global_naval_engagement_modifier	global_naval_engagement_modifier = 0.1	Modifies the maximum naval engagement width.	Multiplicative	1.16
naval_attrition	naval_attrition = -0.1	Modifies the naval attrition taken by ships.	Multiplicative	1.1
naval_morale	naval_morale = 0.1	Modifies the naval morale of all ships.	Multiplicative	1.1
ship_durability	ship_durability = 0.1	Modifies the durability of all ships.	Multiplicative	1.7
sunk_ship_morale_hit_recieved	sunk_ship_morale_hit_recieved = -0.1	Modifies the morale damage taken during battle by losing ships.	Multiplicative	1.18
recover_navy_morale_speed	recover_navy_morale_speed = 0.1	Modifies the morale recovery rate of ships.	Multiplicative	1.1
prestige_from_naval	prestige_from_naval = 0.1	Modifies the prestige gained through naval battles.	Multiplicative	1.11
leader_naval_fire	leader_naval_fire = 1	Adds to the minimum fire pip count a leader can be generated with.	Additive	1.6
leader_naval_manuever	leader_naval_manuever = 1	Adds to the minimum maneuver pip count a leader can be generated with.	Additive	1.6
leader_naval_shock	leader_naval_shock = 1	Adds to the minimum shock pip count a leader can be generated with.	Additive	1.6
own_coast_naval_combat_bonus	own_coast_naval_combat_bonus = 1.0	Modifies the combat bonus navies gain when sailing in coastal tiles that border their home nation.	Multiplicative	1.26
admiral_cost	admiral_cost = -0.1	Modifies the cost of hiring an admiral.	Multiplicative	1.28
movement_speed_onto_off_boat_modifier	movement_speed_onto_off_boat_modifier = -0.1	Modifies the speed at which troops disembark off ships into provinces.	Multiplicative	1.28
global_naval_barrage_cost	global_naval_barrage_cost = -0.1	Modifies the cost for using the ‘Naval Barrage’ action.	Multiplicative	1.28
allowed_marine_fraction	allowed_marine_fraction = 0.1	Modifies the amount of marines allowed to be recruited.	Multiplicative	1.30
flagship_cost	flagship_cost = -0.1	Modifies the cost of building a flagship.	Multiplicative	1.30
may_perform_slave_raid	may_perform_slave_raid = yes	Allows ships to perform slave raids.	Constant	1.16(Only usable in ideas or religions before 1.30)
may_perform_slave_raid_on_same_religion	may_perform_slave_raid_on_same_religion = yes	Grants the abiliy to conduct slave raids against nations that share the same religion.	Constant	1.27(Only usable in ideas or religions before 1.30)

Flagships

Modifier	Example	Description	Effect type	Version added
admiral_skill_gain_modifier	admiral_skill_gain_modifier = 0.1	The monthly chance that an admiral gains a pip while he is assigned to a fleet that is on a mission and contains a flagship with this modifier	Additive	1.28
flagship_durability	flagship_durability = 1	Modifies the ship durability for the flagship.	Multiplicative	1.28
flagship_morale	flagship_morale = 1	Modifies the naval morale for the flagship.	Multiplicative	1.28
flagship_naval_engagement_modifier	flagship_naval_engagement_modifier = 1	Modifies the global naval engagement size for the flagship.	Multiplicative	1.28
flagship_landing_penalty	flagship_landing_penalty = 1	Modifies the disembarkment penalty for the flagship.	Multiplicative	1.28
number_of_cannons_flagship_modifier	number_of_cannons_flagship_modifier = 0.1	Modifies the number of cannons for the flagship.	Multiplicative	1.28
naval_maintenance_flagship_modifier	naval_maintenance_flagship_modifier = -0.1	Modifies the naval maintenance for the flagship.	Multiplicative	1.28
trade_power_in_fleet_modifier	trade_power_in_fleet_modifier = 1	Modifies the trade power conferred by the flagship and all other ships within its fleet.	Multiplicative	1.28
morale_in_fleet_modifier	morale_in_fleet_modifier = 0.1	Modifies the naval morale for the flagship and all other ships within its fleet.	Multiplicative	1.28
blockade_impact_on_siege_in_fleet_modifier	blockade_impact_on_siege_in_fleet_modifier = 0.1	Modifies the blockade impact of the flagship and all other ships within its fleet.	Multiplicative	1.28
exploration_mission_range_in_fleet_modifier	exploration_mission_range_in_fleet_modifier = 100	Modifies the exploration mission range for the flagship and all other ships within its fleet.	Additive	1.28
barrage_cost_in_fleet_modifier	barrage_cost_in_fleet_modifier = -0.1	Modifies the ‘Naval Barrage’ action cost for the flagship and all other ships within its fleet.	Multiplicative	1.28
naval_attrition_in_fleet_modifier	naval_attrition_in_fleet_modifier = -0.1	Modifies the naval attrition suffered by the flagship and all other ships within its fleet.	Multiplicative	1.28
privateering_efficiency_in_fleet_modifier	privateering_efficiency_in_fleet_modifier = 0.1	Modifies the privateering efficiency of the flagship and all other ships within its fleet.	Multiplicative	1.28
prestige_from_battles_in_fleet_modifier	prestige_from_battles_in_fleet_modifier = 1	Modifies the amount of prestige gained from battles for the flagship and all other ships within its fleet.	Multiplicative	1.28
naval_tradition_in_fleet_modifier	naval_tradition_in_fleet_modifier = 1	Modifies the amount of Naval Tradition gained from battles for the flagship and all other ships within its fleet.	Multiplicative	1.28
cannons_for_hunting_pirates_in_fleet	cannons_for_hunting_pirates_in_fleet = 1	Modifies the amount of cannons for the flagship and all other ships within its fleet whilst on the Hunting Pirates mission.	Multiplicative	1.28
movement_speed_in_fleet_modifier	movement_speed_in_fleet_modifier = 0.1	Modifies the movement speed for the flagship and all other ships within its fleet.	Multiplicative	1.28

Diplomacy

Modifier	Example	Description	Effect type	Version added
diplomats	diplomats = 1	Adds to a country's diplomat count.	Additive	1.1
diplomatic_reputation	diplomatic_reputation = 1	Adds to a country's diplomatic reputation.	Additive	1.1
diplomatic_upkeep	diplomatic_upkeep = 1	Adds to the maximum number of free diplomatic relations.	Additive	1.1
envoy_travel_time	envoy_travel_time = -0.2	Modifies diplomat travel time during actions.	Multiplicative	1.6
fabricate_claims_cost	fabricate_claims_cost = -0.2	Modifies spy network cost for fabricating claim.	Multiplicative	1.1
improve_relation_modifier	improve_relation_modifier = 0.2	Modifies the speed of the ‘Improve Relations’ diplomatic action.	Multiplicative	1.18
vassal_forcelimit_bonus	vassal_forcelimit_bonus = 0.2	Modifies the bonus to a country's forcelimit from their subjects.	Multiplicative	1.7
vassal_income	vassal_income = 0.2	Modifies the bonus to a country's income from their subjects.	Multiplicative	1.1
ae_impact	ae_impact = -0.2	Modifies the total size of aggressive expansion gained during actions that confer it.	Multiplicative	1.6
claim_duration	claim_duration = 0.2	Modifies the duration of claims. (not uses in vanilla)	Multiplicative	1.20
diplomatic_annexation_cost	diplomatic_annexation_cost = -0.2	Modifies the diplomatic power cost for annexation.	Multiplicative	1.7
province_warscore_cost	province_warscore_cost = -0.2	Modifies the warscore cost for taking provinces.	Multiplicative	1.8
unjustified_demands	unjustified_demands = -0.2	Modifies the weighting of demands in peace treaties.	Multiplicative	1.1
enemy_core_creation	enemy_core_creation = 0.2	Modifies the cost of coring provinces for enemies that have your cores.	Multiplicative	1.1
rival_change_cost	rival_change_cost = -0.2	Modifies the diplomatic power cost to change rivals.	Multiplicative	1.20
justify_trade_conflict_cost	justify_trade_conflict_cost = -0.2	Modifies the spy network cost to justify trade conflicts.	Multiplicative	1.26
stability_cost_to_declare_war	stability_cost_to_declare_war = 1	Modifies the stability cost to declare war. Default is 0 with a casus belli and no truce.	Additive	1.30
accept_vassalization_reasons	accept_vassalization_reasons = 5	Gives reasons to accept vassalization.	Additive	1.30
transfer_trade_power_reasons	transfer_trade_power_reasons = 5	Gives reasons to transfer trade.	Additive	1.30

Economy

Modifier	Example	Description	Effect type	Version added
global_tax_income	global_tax_income = 12	Adds to the base tax income per year (i.e. 12 equals 1 extra per month).	Additive	1.10
global_tax_modifier	global_tax_modifier = 0.05	Modifies the base tax income by a percentage.	Multiplicative	1.1
production_efficiency	production_efficiency = 0.05	Modifies the base production income by a percentage.	Multiplicative	1.1
state_maintenance_modifier	state_maintenance_modifier = -0.25	Modifies the maintenance cost for states.	Multiplicative	1.16
inflation_action_cost	inflation_action_cost = -0.1	Modifies the administrative power cost for reducing inflation.	Multiplicative	1.2
inflation_reduction	inflation_reduction = 0.1	Adds to the base yearly inflation reduction rate.	Additive	1.1
interest	interest = -1	Adds to the base interest rate.	Additive	1.1
development_cost	development_cost = -0.1	Modifies the development cost for provinces.	Multiplicative	1.12
build_cost	build_cost = -0.1	Modifies all building costs.	Multiplicative	1.1
build_time	build_time = -0.25	Modifies all building construction times.	Multiplicative	1.1
administrative_efficiency	administrative_efficiency = 0.2	Modifies the base core creation cost, diplo-annexation costs and the impact of province development on overextension and warscore cost.	Multiplicative	1.20
core_creation	core_creation = -0.1	Modifies the base core creation cost.	Multiplicative	1.1
core_decay_on_your_own	core_decay_on_your_own = -0.1	Modifies the rate at which the cores of a country will decay when under the ownership of a different country.	Multiplicative	1.20

Technology

Modifier	Example	Description	Effect type	Version added
<tech>_cost_modifier	adm_tech_cost_modifier = -0.1	Modifies the monarch power cost of <tech> technologies. Generated automatically for all technology tables in /Europa Universalis IV/common/technology.txt.	Multiplicative	1.1
technology_cost	technology_cost = -0.1	Modifies the monarch power cost of all technologies.	Multiplicative	1.1
idea_cost	idea_cost = -0.1	Modifies the monarch power cost of purchasable ideas.	Multiplicative	1.1
embracement_cost	embracement_cost = -0.1	Modifies the ducat cost for embracing an institution.	Multiplicative	1.18
global_institution_spread	global_institution_spread = 0.1	Modifies the rate of spread for institutions in all owned provinces.	Multiplicative	1.18
institution_spread_from_true_faith	institution_spread_from_true_faith = 0.1	Modifies the rate of spread for institutions in owned provinces following the owner's religion.	Multiplicative	1.20
native_advancement_cost	native_advancement_cost = -0.2	Modifies the monarch power cost of native advancements.	Multiplicative	1.4
all_power_cost	all_power_cost = -0.1	Modifies the monarch power cost of every action that costs monarch power.	Multiplicative	1.16
innovativeness_gain	innovativeness_gain = 0.5	Modifies the amount of innovativeness gained	Multiplicative	1.25
free_adm_policy	free_adm_policy = 1	Modifies the amount of free administrative policies.	Additive	1.26
free_dip_policy	free_dip_policy = 1	Modifies the amount of free diplomatic policies.	Additive	1.26
free_mil_policy	free_mil_policy = 1	Modifies the amount of free military policies.	Additive	1.26
possible_adm_policy	possible_adm_policy = 1	Modifies the amount of administrative policy slots.	Additive	1.26
possible_dip_policy	possible_dip_policy = 1	Modifies the amount of diplomatic policy slots.	Additive	1.26
possible_mil_policy	possible_mil_policy = 1	Modifies the amount of military policy slots.	Additive	1.26
possible_policy	possible_policy = 1	Modifies the amount of all policy slots.	Additive
free_policy	free_policy = 1	Modifies the amount of policy slots.	Additive	1.26
country_admin_power	country_admin_power = 1	Modifies the monthly administrative power a country generates.	Additive	1.30
country_diplomatic_power	country_diplomatic_power = 1	Modifies the monthly diplomatic power a country generates.	Additive	1.30
country_military_power	country_military_power = 1	Modifies the monthly military power a country generates.	Additive	1.30

Court

Modifier	Example	Description	Effect type	Version added
prestige	prestige = 0.5	Adds to the base yearly rate of prestige.	Additive	1.1
prestige_decay	prestige_decay = -0.01	Adds to the base rate of prestige decay.	Additive	1.1
monthly_splendor	monthly_splendor = 1	Adds to the monthly rate of splendor points.	Additive	1.20
yearly_corruption	yearly_corruption = -0.1	Adds to the yearly rate of corruption.	Additive	1.16
advisor_cost	advisor_cost = -0.25	Modifies the base cost of advisors.	Multiplicative	1.1
advisor_pool	advisor_pool = 1	Adds to the pool size for advisors.	Additive	1.1
female_advisor_chance	female_advisor_chance = 0.1	Modifies the base chance rate for female advisors.	Multiplicative	1.12
heir_chance	heir_chance = 0.5	Modifies the base chance for an heir during the heir generation tick.	Multiplicative	1.1
monarch_admin_power	monarch_admin_power = 1	Adds to the base ADM skill a ruler, heir and consort can be generated with. Does not affect rulers created with fixed = yes.	Additive	1.20
monarch_diplomatic_power	monarch_diplomatic_power = 1	Adds to the base DIP skill a ruler, heir and consort can be generated with. Does not affect rulers created with fixed = yes.	Additive	1.20
monarch_military_power	monarch_military_power = 1	Adds to the base MIL skill a ruler, heir and consort can be generated with. Does not affect rulers created with fixed = yes.	Additive	1.20
adm_advisor_cost	adm_advisor_cost = -0.1	Modifies the cost of hiring an administrative advisor.	Multiplicative	1.26
dip_advisor_cost	dip_advisor_cost = -0.1	Modifies the cost of hiring an diplomatic advisor.	Multiplicative	1.26
mil_advisor_cost	mil_advisor_cost = -0.1	Modifies the cost of hiring an military advisor.	Multiplicative	1.26
monthly_support_heir_gain	monthly_support_heir_gain = 0.1	Modifies the monthly gain in support for the heir of a country in an country that uses the ‘Elective Monarchy’ mechanics.	Multiplicative	1.27
power_projection_from_insults	power_projection_from_insults = 0.1	Modifies the amount of power projection gained when using the ‘Insult’ diplomatic action.	Multiplicative	1.27

Government

Modifier	Example	Description	Effect type	Version added
yearly_absolutism	yearly_absolutism = 0.1	Adds to the yearly base rate of absolutism.	Additive	1.20
max_absolutism	max_absolutism = 10	Adds to the maximum value of absolutism. Internally absolutism bonuses do not scale above 100.	Additive	1.20
legitimacy	legitimacy = 1	Adds to the yearly rate of legitimacy. Does not appear or have an effect if a country's government does not use legitimacy.	Additive	1.1
republican_tradition	republican_tradition = 0.5	Adds to the yearly rate of republican tradition. Does not appear or have an effect if a country's government does not use republican tradition.	Additive	1.1
devotion	devotion = 1	Adds to the yearly rate of devotion. Does not appear or have an effect if a country's government does not use devotion.	Additive	1.12
horde_unity	horde_unity = 1	Adds to the yearly rate of horde unity. Does not appear or have an effect if a country's government does not use horde unity.	Additive	1.14
meritocracy	meritocracy = 1	Adds to the yearly rate of meritocracy. Does not appear or have an effect if a country's government does not use meritocracy.	Additive	1.20
monthly_militarized_society	monthly_militarized_society = 0.05	Adds to the monthly rate of militarisation for governments with the militarisation mechanic.	Additive	1.18
yearly_tribal_allegiance	yearly_tribal_allegiance = 0.05	Adds to the yearly rate of tribal allegiance for governments with the tribal allegiance mechanic.	Additive	1.23
<faction>_influence	<faction>_influence = 0.1	Adds to the monthly rate of faction influence. Generated automatically for all factions in /Europa Universalis IV/common/factions.	Additive	1.1
imperial_mandate	imperial_mandate = 0.1	Adds to the rate of Mandate gained per month.	Additive	1.21
election_cycle	election_cycle = 1	Adds to the duration of an election cycle for the current nation. Negative values shorten the duration, positive values add to it.	Additive	1.26
candidate_random_bonus	candidate_random_bonus = 1	Adds to the randomized stats a republican candidate may receive during elections.	Additive	1.26
reelection_cost	reelection_cost = -0.1	Modifies the cost in Republican Tradition when re-electing candidates.	Multiplicative	1.26
reform_progress_growth	reform_progress_growth = 0.1	Adds to the rate of government reform progress gain.	Additive	1.26
governing_capacity	governing_capacity = 100	Adds to the base governing capacity.	Additive	1.30
governing_capacity_modifier	governing_capacity_modifier = 0.1	Modifies the base governing capacity.	Multiplicative	1.30
state_governing_cost	state_governing_cost = 0.1	Modifies the governing capacity usage of states.	Multiplicative	1.30
trade_company_governing_cost	trade_company_governing_cost = 0.1	Modifies the governing capacity usage of trade companies.	Multiplicative	1.30
expand_administration_cost	expand_administration_cost = 0.1	Modifies the cost of the ‘Expand Administration’ action.	Multiplicative	1.30
yearly_revolutionary_zeal	yearly_revolutionary_zeal = 0.1	Adds to the yearly base rate of revolutionary zeal.	Additive	1.30
max_revolutionary_zeal	max_revolutionary_zeal= 10	Adds to the maximum value of revolutionary zeal. Internally revolutionary zeal bonuses do not scale above 100.	Additive	1.30

Estates

Modifier	Example	Description	Effect type	Version added
<estate>_influence_modifier	church_influence_modifier = 0.1	Modifies to the influence of the specified estate.	Multiplicative	1.30
<estate>_loyalty_modifier	church_loyalty_modifier = 0.1	Modifies to the loyalty equilibrium of the specified estate.	Multiplicative	1.30

Holy Roman Empire

Modifier	Example	Description	Effect type	Version added
imperial_authority	imperial_authority = 0.05	Modifies the impact of imperial authority gains.	Multiplicative	1.1
imperial_authority_value	imperial_authority_value = 0.1	Adds to the rate of imperial authority gained per month.	Additive	1.1
free_city_imperial_authority	free_city_imperial_authority = 0.1	Adds to the rate of imperial authority gained per month from Free Cities.	Additive	1.30
imperial_mercenary_cost	imperial_mercenary_cost = -0.1	Modifies the cost of mercenary companies for nations within the Holy Roman Empire.	Multiplicative	1.30
max_free_cities	max_free_cities = 3	Adds to the maximum number of free cities allowed.	Additive	1.30
max_electors	max_electors = 3	Adds to the maximum number of electors allowed.	Additive	1.30
legitimate_subject_elector	legitimate_subject_elector = 50	Adds to the elector desire for the current country to become Emperor (if they are a valid choice).	Additive	1.30

Culture

Modifier	Example	Description	Effect type	Version added
culture_conversion_cost	culture_conversion_cost = -0.25	Modifies the diplomatic power cost for culture conversion in provinces.	Multiplicative	1.7
num_accepted_cultures	num_accepted_cultures = 1	Adds to the maximum number of accepted cultures a country can have.	Additive	1.18
same_culture_advisor_cost	same_culture_advisor_cost = -0.5	Modifies the advisor cost for advisors that share the same culture as the country's court they're in.	Multiplicative	1.23
promote_culture_cost	promote_culture_cost = -0.25	Modifies the diplomatic power cost for promoting a culture.	Multiplicative	1.23

Stability

Modifier	Example	Description	Effect type	Version added
global_unrest	global_unrest = -2	Adds to the base unrest value.	Additive	1.8
stability_cost_modifier	stability_cost_modifier = -0.1	Modifies the administrative power cost of raising stability.	Multiplicative	1.1
global_autonomy	global_autonomy = -0.05	Adds to the monthly rate of autonomy in owned provinces.	Additive	1.8
min_autonomy	min_autonomy = 50	Sets the minimum autonomy level allowed in all owned provinces.	Constant	1.8
autonomy_change_time	autonomy_change_time = -0.25	Modifies the cooldown for the autonomy reduction and increase buttons.	Multiplicative	1.8
harsh_treatment_cost	harsh_treatment_cost = -0.2	Modifies the military power cost for using harsh treatment.	Multiplicative	1.20
years_of_nationalism	years_of_nationalism = -5	Adds to the base separatism value of provinces when conquered.	Additive	1.7
min_autonomy_in_territories	min_autonomy_in_territories = 0.1	Modifies the minimum autonomy experienced in territories.	Additive	1.26
unrest_catholic_provinces	unrest_catholic_provinces = -2	Modifies the local unrest in all provinces of the catholic religion	Additive	1.30

Subject

Modifier	Example	Description	Effect type	Version added
liberty_desire	liberty_desire = -10	Adds to subject liberty desire against their overlord.	Additive	1.4
liberty_desire_from_subject_development	liberty_desire_from_subject_development = -0.25	Modifies the subject liberty desire from development against their overlord (Note: Tooltip is bugged as of 1.29. A modifier of -0.2 shows as "-0.20%" when it reduces it by 20%).	Multiplicative	1.20
reduced_liberty_desire	reduced_liberty_desire = 10	Adds to the liberty desire subjects have against their overlord. Applied to the overlord.	Additive	1.17
reduced_liberty_desire_on_same_continent	reduced_liberty_desire_on_same_continent = 10	Adds to the liberty desire subjects have against their overlord if on the same continent. Applied to the overlord.	Additive	1.20

Espionage

Modifier	Example	Description	Effect type	Version added
spy_offence	spy_offence = 0.1	Modifies the base effectiveness of spies against enemies.	Multiplicative	1.1
global_spy_defence	global_spy_defence = 0.1	Modifies the base effectiveness of counter-espionage against enemy spies.	Multiplicative	1.1
discovered_relations_impact	discovered_relations_impact = -0.1	Modifies the relations impact applied to a country when discovered committing an espionage action.	Multiplicative	1.1
rebel_support_efficiency	rebel_support_efficiency = 0.5	Modifies the effectiveness of supported rebels in other countries.	Multiplicative	1.1

Religion

Modifier	Example	Description	Effect type	Version added
global_missionary_strength	global_missionary_strength = 0.03	Adds to the base missionary strength against all religions.	Additive	1.1
global_heretic_missionary_strength	global_heretic_missionary_strength = 0.03	Adds to the base missionary strength against heretic religions.	Additive	1.6
missionaries	missionaries = 1	Adds to the base missionary count for a country.	Additive	1.1
missionary_maintenance_cost	missionary_maintenance_cost = -0.1	Modifies the cost of missionary maintenance whilst converting provinces.	Multiplicative	1.28
religious_unity	religious_unity = 0.5	Adds to the base religious unity value for a country.	Additive	1.1
tolerance_own	tolerance_own = 1	Adds to the base tolerance for the true faith within a country.	Additive	1.1
tolerance_heretic	tolerance_heretic = 1	Adds to the base tolerance for heretics within a country.	Additive	1.1
tolerance_heathen	tolerance_heathen = 1	Adds to the base tolerance for heathens within a country.	Additive	1.1
papal_influence	papal_influence = 0.5	Adds to the rate of papal influence gained per year.	Additive	1.1
church_power_modifier	church_power_modifier = 0.5	Modifies the effectiveness of church power gains.	Multiplicative	1.12
monthly_fervor_increase	monthly_fervor_increase = 1	Adds to the rate of fervor gained per month.	Additive	1.1
harmonization_speed	harmonization_speed = 0.2	Modifies the rate at which harmonization occurs.	Multiplicative	1.1
yearly_harmony	yearly_harmony = 1	Adds to the rate of harmony gained per year.	Additive	1.20
monthly_piety	monthly_piety = 0.1	Adds to the rate of piety gained per month.	Additive	1.22
monthly_karma	monthly_karma = 0.1	Adds to the rate of karma gained per month.	Additive	1.22
enforce_religion_cost	enforce_religion_cost = -0.5	Modifies the war score cost for the Enforce Religion peace term.	Multiplicative	1.20
prestige_per_development_from_conversion	prestige_per_development_from_conversion = 0.5	Adds to the prestige bonus gained per development when successfully converting a province to a state religion.	Additive	1.20
warscore_cost_vs_other_religion	warscore_cost_vs_other_religion = -0.25	Modifies the war score costs for peace terms whilst in war against countries of a different religion.	Multiplicative	1.20
establish_order_cost	establish_order_cost = -0.1	Modifies the cost for using the ‘Establish Order’ action.	Multiplicative	1.28
global_religious_conversion_resistance	global_religious_conversion_resistance = -0.1	Adds to conversion resistance from centres of reformation in all provinces.	Multiplicative	1.30
relation_with_heretics	relation_with_heretics = -20	Adds to the opinion modifier between a country and heretic countries.	Additive	1.30
curia_treasury_contribution	curia_treasury_contribution = 0.1	Modifies the amount of treasury contribution to the Curia.	Multiplicative	1.30
curia_powers_cost	curia_powers_cost = 0.1	Modifies the papal influence cost of the curia actions.	Multiplicative	1.30
yearly_patriarch_authority	yearly_patriarch_authority = 0.1	Adds to the amount of yearly patriarch authority gained.	Additive	1.30
cb_on_religious_enemies	cb_on_religious_enemies = yes	Acts a visible script flag. Can be checked in triggers with cb_on_religious_enemies = yes	Constant	1.1(Only usable in ideas or religions before 1.30)
global_heathen_missionary_strength	global_heathen_missionary_strength = 0.03	Adds to the base missionary strength against heathen religions.	Additive	1.30

Colonisation

Modifier	Example	Description	Effect type	Version added
colonists	colonists = 1	Modifies the base colonist count for a country.	Additive	1.1
colonist_placement_chance	colonist_placement_chance = 0.05	Adds to the base colonial placement chance for colonists, which is the chance that additional settlers will be spawned whilst the colonist is present.	Additive	1.1
global_colonial_growth	global_colonial_growth = 10	Adds to the base yearly colonial growth gain.	Additive	1.1
range	range = 0.5	Modifies the base colonisation range, used for exploration, colonisation and coring province that border sea.	Multiplicative	1.1
native_uprising_chance	native_uprising_chance = -0.25	Adds to the chance of native uprisings in a colony province.	Multiplicative	1.14
native_assimilation	native_assimilation = 0.25	Modifies the bonus from assimilation in colonies. Native assimilation is bonus to goods produced depends on the native population.	Multiplicative	1.14
migration_cooldown	migration_cooldown = -0.2	Modifies the cooldown for the migration action for primitive nations that can migrate.	Multiplicative	1.4
global_tariffs	global_tariffs = 0.25	Modifies the tariff income from colonial nations.	Multiplicative	1.1
treasure_fleet_income	treasure_fleet_income = 0.1	Modifies the income from treasure fleets sent by colonial nations.	Multiplicative	1.28
expel_minorities_cost	expel_minorities_cost = -0.1	Modifies the cost of using the ‘Expel Minorities’ action.	Multiplicative	1.28

Trade

Modifier	Example	Description	Effect type	Version added
caravan_power	caravan_power = 0.2	Modifies the bonus trade power inland nodes receive from trade power sources.	Multiplicative	1.10
merchants	merchants = 1	Adds to the base merchant count for a country.	Additive	1.1
placed_merchant_power	placed_merchant_power = 3	Modifies the additional trade power when a merchant present in a trade node.	Additive	1.20
global_trade_power	global_trade_power = 0.1	Modifies the trade power in all trade nodes for a country.	Multiplicative	1.1
global_foreign_trade_power	global_foreign_trade_power = 0.1	Modifies the trade power for a country in trade nodes that are not domestic.	Multiplicative	1.1
global_own_trade_power	global_own_trade_power = 0.1	Modifies the trade power for a country in trade nodes that are domestic.	Multiplicative	1.1
global_prov_trade_power_modifier	global_prov_trade_power_modifier = 0.1	Modifies the base trade power of owned provinces.	Multiplicative	1.1
global_trade_goods_size_modifier	global_trade_goods_size_modifier = 0.1	Modifies the base trade good size of owned provinces.	Multiplicative	1.12
trade_efficiency	trade_efficiency = 0.1	Modifies a country's trade income. (Maximum is 200%)	Multiplicative	1.1
trade_range_modifier	trade_range_modifier = 0.25	Modifies the trade range used to determine if a country can place a merchant in a trade node.	Multiplicative	1.1
trade_steering	trade_steering = 0.1	Modifies the bonus to trade power used for steering when determining which outgoing node trade is steered to. If you have a merchant present, it also slightly increases the outgoing value.	Multiplicative	1.1
global_ship_trade_power	global_ship_trade_power = 0.2	Modifies the trade power ships grant when protecting trade.	Multiplicative	1.16
privateer_efficiency	privateer_efficiency = 0.2	Modifies the effectiveness of privateers in a trade node.	Multiplicative	1.6
embargo_efficiency	embargo_efficiency = 0.25	Modifies the effectiveness of embargoing another country.	Multiplicative	1.1
ship_power_propagation	ship_power_propagation = 0.1	Modifies the propagation of trade power from ships protecting trade.	Multiplicative	1.20
center_of_trade_upgrade_cost	center_of_trade_upgrade_cost = -0.1	Modifies the cost of upgrading a center of trade in a province.	Multiplicative	1.27
trade_company_investment_cost	trade_company_investment_cost = -0.1	Modifies the cost of purchasing a trade company investment in a state.	Multiplicative	1.27
mercantilism_cost	mercantilism_cost = -0.1	Modifies the cost of the ‘Boost Mercantilism’ action.	Multiplicative	1.30

Province modifiers

Technology

Modifier	Example	Description	Effect type	Version added
institution_growth	institution_growth = 1	Modifies the annual growth of all institutions in a province by the specified value. Is not scaled by province development level	Additive	1.25

Military

Modifier	Example	Description	Effect type	Version added
max_attrition	max_attrition = 5	Adds to the maximum attrition that can be experienced in a province.	Additive	1.1
attrition	attrition = 5	Adds to the base attrition in a province.	Additive	1.1
local_hostile_attrition	local_hostile_attrition = 5	Adds to the base attrition for enemies in a province.	Additive	1.4
fort_level	fort_level = 1	Adds to the fort level in a province, determining how difficult it is to siege.	Additive	1.8
garrison_growth	garrison_growth = 0.05	Modifies the rate of garrison growth in a province.	Multiplicative	1.1
local_defensiveness	local_defensiveness = 0.1	Modifies the defensiveness of a province, impacting siege phase length.	Multiplicative	1.1
local_friendly_movement_speed	local_friendly_movement_speed = 0.1	Modifies the movement speed of units in a province that are considered friendly.	Multiplicative	1.20
local_hostile_movement_speed	local_hostile_movement_speed = 0.1	Modifies the movement speed of units in a province that are considered enemies.	Multiplicative	1.20
local_manpower	local_manpower = 1	Adds to the base manpower value. 1 equals 1000 men.	Additive	1.1
local_manpower_modifier	local_manpower_modifier = 0.25	Modifies the manpower efficiency in a province.	Multiplicative	1.1
local_regiment_cost	local_regiment_cost = -0.25	Modifies the recruitment cost of land units in a province.	Multiplicative	1.1
regiment_recruit_speed	regiment_recruit_speed = -0.25	Modifies the recruitment speed of land units in a province.	Multiplicative	1.1
supply_limit	supply_limit = 1	Adds to the base supply limit of a province.	Additive	1.1
supply_limit_modifier	supply_limit_modifier = 0.25	Modifies the supply limit efficiency of a province.	Multiplicative	1.1
local_amount_of_banners	local_amount_of_banners = 0.1	Modiifes the amount of banners that can be raised from a province.	Multiplicative	1.20

Navy

Modifier	Example	Description	Effect type	Version added
local_naval_engagement_modifier	local_naval_engagement_modifier = 0.1	Modifies the naval engagement width in a province. Only usable in sea provinces.	Multiplicative	1.16
local_sailors	local_sailors = 1	Adds to the sailors value for a province. 1 equals 1 sailor.	Additive	1.16
local_sailors_modifier	local_sailors_modifier = 0.1	Modifies the sailors efficiency of a province.	Multiplicative	1.16
local_ship_cost	local_ship_cost = -0.2	Modifies the cost of ship recruitment in a province.	Multiplicative	1.1
local_ship_repair	local_ship_repair = 0.2	Modifies the speed of ship repair in a province.	Multiplicative	1.1
ship_recruit_speed	ship_recruit_speed = -0.25	Modifies the recruitment speed of ships in a province.	Multiplicative	1.1
blockade_force_required	blockade_force_required = 0.5	Modifies the number of ships required to fully blockade the province.	Multiplicative	1.30
hostile_disembark_speed	hostile_disembark_speed = 0.5	Modifies the speed of disembarkation by hostile troops into the province.	Multiplicative	1.30
hostile_fleet_attrition	hostile_fleet_attrition = 5	Modifies the amount of fleet attrition experienced by hostile ships in sea zones adjacent to the province.	Multiplicative	1.30

Colonisation

Modifier	Example	Description	Effect type	Version added
local_colonial_growth	local_colonial_growth = 10	Adds to the colonial growth in a colony province.	Additive	1.1
local_colonist_placement_chance	local_colonist_placement_chance = 0.05	Adds to the placement chance in a colony province.	Additive	1.1

Economy

Modifier	Example	Description	Effect type	Version added
inflation_reduction_local	inflation_reduction_local = 0.1	Adds to the base yearly inflation value. Requires every province in a country to have the modifier to work however.	Additive	1.1
local_state_maintenance_modifier	local_state_maintenance_modifier = -0.25	Modifies the state maintenance cost for the state that a province belongs to.	Multiplicative	1.16
local_build_cost	local_build_cost = -0.25	Modifies the cost of constructing buildings in a province.	Multiplicative	1.1
local_build_time	local_build_time = -0.25	Modifies the construction speed of buildings in a province.	Multiplicative	1.1
local_monthly_devastation	local_monthly_devastation = -0.1	Adds to the devastation rate in a province.	Additive	1.20
local_production_efficiency	local_production_efficiency = 0.1	Modifies the production efficiency in a province.	Multiplicative	1.1
local_tax_modifier	local_tax_modifier = 0.1	Modifies the tax efficiency in a province.	Multiplicative	1.1
tax_income	tax_income = 12	Adds to the yearly tax income of a province.	Additive	1.10
allowed_num_of_buildings	allowed_num_of_buildings = 1	Adds to the maximum number of building slots in a province.	Additive	1.12
local_development_cost	local_development_cost = -0.1	Modifies the monarch power cost for development in a province. Converts to local_tax_modifier in for non-Common Sense owners.	Multiplicative	1.12
local_institution_spread	local_institution_spread = 0.1	Modifies the spread of institutions in a province.	Multiplicative	1.18
local_core_creation	local_core_creation = -0.25	Modifies the cost of coring in a province.	Multiplicative	1.18
local_governing_cost	local_governing_cost = -0.25	Modifies the local governing capacity usage of the province.	Multiplicative	1.30
statewide_governing_cost	statewide_governing_cost = -0.25	Modifies the local governing capacity usage of all provinces in the state of the province.	Multiplicative	1.30

Trade

Modifier	Example	Description	Effect type	Version added
province_trade_power_modifier	province_trade_power_modifier = 0.1	Modifies the trade power efficiency in a province.	Multiplicative	1.1
province_trade_power_value	province_trade_power_value = 0.5	Adds to the trade power in a province.	Additive	1.1
trade_goods_size_modifier	trade_goods_size_modifier = 0.25	Modifies the goods produced efficiency in a province.	Multiplicative	1.12
trade_goods_size	trade_goods_size = 0.5	Adds to the trade good size in a province	Additive	1.12
trade_value_modifier	trade_value_modifier = 0.1	Modifies the base trade value in a province.	Multiplicative	1.1
trade_value	trade_value = 1	Adds to the base trade value in a province.	Additive	1.1

Religion

Modifier	Example	Description	Effect type	Version added
local_missionary_strength	local_missionary_strength = 0.01	Adds to the missionary strength in a province. 1 equals 100% strength.	Additive	1.1
local_religious_unity_contribution	local_religious_unity_contribution = 0.1	Adds to the religious unity contribution made by a province.	Additive	1.28
local_missionary_maintenance_cost	local_missionary_maintenance_cost = -0.1	Adds to the missionary maintenance cost for converting a province.	Additive	1.28
local_religious_conversion_resistance	local_religious_conversion_resistance = 0.1	Adds to conversion resistance from Centres of Reformation.	Additive	1.30

Culture

Modifier	Example	Description	Effect type	Version added
local_culture_conversion_cost	local_culture_conversion_cost = -0.25	Modifies the culture conversion cost in a province.	Multiplicative	1.22

Stability

Modifier	Example	Description	Effect type	Version added
local_unrest	local_unrest = -1	Adds to the unrest value in a province.	Additive	1.8
local_autonomy	local_autonomy = 0.05	Adds to the autonomy rate in a province.	Additive	1.8
local_years_of_nationalism	local_years_of_nationalism = -5	Adds to the base nationalism value in a province.	Additive	1.20
min_local_autonomy	min_local_autonomy = 50	Sets the minimum autonomy value a province can have.	Constant	1.16

Rule modifiers

Age

Only usable in age bonuses.

Modifier	Example	Description	Effect type	Version added
attack_bonus_in_capital_terrain	attack_bonus_in_capital_terrain = yes	Grants attack bonus in provinces with the same terrain as capital province.	Constant	1.20
can_bypass_forts	can_bypass_forts = yes	Allows units to ignore fort zones of control.	Constant	1.20
can_chain_claim	can_chain_claim = yes	Allows claims to be enacted through already claimed provinces.	Constant	1.20
can_colony_boost_development	can_colony_boost_development = yes	Grants bonus 1 tax, production and manpower on completed colonies.	Constant	1.20
can_transfer_vassal_wargoal	can_transfer_vassal_wargoal = yes	Allows usage of the ‘Transfer Subject’ peace term at half cost.	Constant	1.20
force_march_free	force_march_free = yes	Allows usage of the ‘Force March’ action for free.	Constant	1.20
free_maintenance_on_expl_conq	free_maintenance_on_expl_conq = yes	Removes maintenance cost for explorers and conquisadors.	Constant	1.20
ignore_coring_distance	ignore_coring_distance = yes	Allows coring in any uncored province, regardless of distance.	Constant	1.20

Ideas

Only usable in ideas.

Modifier	Example	Description	Effect type	Version added
cb_on_government_enemies	cb_on_government_enemies = yes	Acts a visible script flag. Can be checked in triggers with cb_on_government_enemies = yes	Constant	1.1
cb_on_primitives	cb_on_primitives = yes	Allows claims to be fabricated on overseas provinces in colonial regions.	Constant	1.1
cb_on_overseas	cb_on_overseas = yes	Allows claims to be fabricated on overseas provinces in trade company regions.	Constant	1.1
idea_claim_colonies	idea_claim_colonies = yes	Allows claims to be fabricated on overseas provinces in colonial regions that are owned by another nation that is also overseas.	Constant	1.1
may_explore	may_explore = yes	Allows the recruitment of explorers and conquisadors.	Constant	1.1
no_religion_penalty	no_religion_penalty = yes	Removes the penalties associated with negative religious tolerance.	Constant	1.1
reduced_stab_impacts	reduced_stab_impacts = yes	Reduces the stability hits when taking diplomatic actions that cause them (i.e. ‘Break Marriage’).	Constant	1.1
sea_repair	sea_repair = yes	Allows ships to repair in coastal sea zones adjacent to owned provinces.	Constant	1.1
may_establish_frontier	may_establish_frontier = yes	Allows the usage of the Siberean frontier mechanic.	Constant	1.22
extra_manpower_at_religious_war	extra_manpower_at_religious_war = yes	Grants an increase in manpower recovery by a factor of 3 during religious wars.	Constant	1.1
auto_explore_adjacent_to_colony	auto_explore_adjacent_to_colony = yes	Grants the abiliy to automatically discover undiscovered provinces adjacent to colonies.	Constant	1.1
can_fabricate_for_vassals	can_fabricate_for_vassals = yes	Grants the abiliy to fabricate claims for vassals.	Constant	1.27

Banners

Modifier	Example	Description	Effect type	Version added
has_banners	has_banners = 1	Allows the usage of Manchu banner units. Country scope.	Constant	1.20
local_has_banners	local_has_banners = 1	Allows Manchu banner units to be raised in owned provinces. Province scope.	Constant	1.20

Unique modifiers

There are three modifiers that are used within event modifiers only:

religion = yes
secondary_religion = yes

When added to an event modifier, these will cause the event modifier to disappear if the country changes religion (or syncretic religion).

is_janissary_modifier = yes

When added to an event modifier, the event modifier will only affect janissary regiments. Without the Cradle of Civilization this part is ignored and the event modifiers become a normal global modifier.

is_rajput_modifier = yes

When added to an event modifier, the event modifier will only affect rajput regiments. Without the Dharma this part is ignored and the event modifiers become a normal global modifier.

Removed modifiers

These modifiers have been removed from the game and no longer function.

Modifier	Example	Version removed
overseas_income	overseas_income = 0.1	1.4
local_tariffs	local_tariffs = 0.1	1.4
colonist_time	colonist_time = -0.1	1.4
leader_fire	leader_fire = 1	1.6
leader_shock	leader_shock = 1	1.6
minimum_revolt_risk	minimum_revolt_risk = 1	1.8
local_revolt_risk	local_revolt_risk = 1	1.8
global_revolt_risk	global_revolt_risk = 1	1.8
colonial_liberty_desire	colonial_liberty_desire = 0.05	1.10 (added in 1.8)
merchant_steering_to_inland	merchant_steering_to_inland = 10	1.10 (added in 1.6)
may_force_march	may_force_march = yes	1.10
merchant_present_inland	merchant_present_inland = 5	1.10 (added in 1.6)
build_power_cost	build_power_cost = -0.2	1.12 (added in 1.7)
global_trade_income_modifier	global_trade_income_modifier = 0.1	1.13
reduced_native_attacks	reduced_native_attacks = yes	1.14
local_spy_defence	local_spy_defence = 0.5	1.16
may_study_technology	may_study_technology = yes	1.16
may_sow_discontent	may_sow_discontent = yes	1.16
may_sabotage_reputation	may_sabotage_reputation = yes	1.16
may_infiltrate_administration	may_infiltrate_administration = yes	1.16
may_agitate_for_liberty	may_agitate_for_liberty = yes	1.16
accepted_culture_threshold	accepted_culture_threshold = -0.1	1.18 (added in 1.7)
relations_decay_of_me	relations_decay_of_me = 0.3	1.19
no_cost_for_reinforcing	no_cost_for_reinforcing = yes	1.19
cs_only_local_development_cost	cs_only_local_development_cost = -0.25	1.27
max_states	max_states = 5	1.30 (added in 1.16)
possible_mercenaries	possible_mercenaries = 0.5	1.30
religious_conversion_resistance	religious_conversion_resistance = 0.1	1.30 (added in 1.20)

Modding

Audio

Music • Sound

Guides

Adding a province • Save-game editing