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 = 0.5	Adds to the rate of Army Tradition gained each year.	Additive	1.1
army_tradition_decay	army_tradition_decay = -0.1	Adds to the decay rate of Army Tradition.	Additive	1.1
army_tradition_from_battle	army_tradition_from_battle = 0.05	Modifies the Army Tradition bonus when gained through battles.	Multiplicative	1.18
yearly_army_professionalism	yearly_army_professionalism = 0.1	Modifies the rate of Army Professionalism gained each year.	Multiplicative	1.23
drill_gain_modifier	drill_gain_modifier = 0.1	Modifies the army drill gains while drilling	Multiplicative	1.23
drill_decay_modifier	drill_decay_modifier = -0.1	Modifies the army drill decay rate per year.	Multiplicative	1.24
infantry_cost	infantry_cost = -0.1	Modifies the base cost of infantry units.	Multiplicative	1.1
infantry_power	infantry_power = 0.1	Modifies the power infantry gain from unit pips.	Multiplicative	1.1
cavalry_cost	cavalry_cost = -0.1	Modifies the base cost of cavalry units.	Multiplicative	1.1
cavalry_power	cavalry_power = 0.1	Modifies the power cavalry gain from unit pips.	Multiplicative	1.1
artillery_cost	artillery_cost = -0.1	Modifies the base cost of artillery units.	Multiplicative	1.1
artillery_power	artillery_power = 0.1	Modifies the power artillery gain from unit pips.	Multiplicative	1.1
cav_to_inf_ratio	cav_to_inf_ratio = 0.1	Adds to the ratio required to negate the Insufficient Support penalty.	Additive	1.20
cavalry_flanking	cavalry_flanking = 0.1	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 = 0.1	Modifies the bonus damage artillery inflict when in the backrow during combat.	Multiplicative	1.20
discipline	discipline = 0.1	Modifies the discipline of land units.	Multiplicative	1.1
mercenary_discipline	mercenary_discipline = 0.1	Modifies the discipline of mercenary units.	Multiplicative	1.20
land_morale	land_morale = 0.1	Modifies the land morale of land units.	Multiplicative	1.1
defensiveness	defensiveness = 0.25	Modifies the siege defensiveness that affects siege phase length.	Multiplicative	1.1
siege_ability	siege_ability = 0.1	Modifies the siege ability that affects siege phase length. Reverse concept of defensiveness.	Multiplicative	1.6
movement_speed	movement_speed = 0.1	Modifies the base movement speed for all land units.	Multiplicative	1.18
fire_damage	fire_damage = 0.1	Modifies the fire damage done by land units.	Multiplicative	1.18
fire_damage_received	fire_damage_received = -0.1	Modifies the fire damage taken by land units.	Multiplicative	1.18
shock_damage	shock_damage = 0.1	Modifies the shock damage done by land units.	Multiplicative	1.18
shock_damage_received	shock_damage_received = -0.1	Modifies the shock damage taken by land units.	Multiplicative	1.18
recover_army_morale_speed	recover_army_morale_speed = 0.1	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 = 0.1	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 = -0.1	Modifies the attrition taken by land units.	Multiplicative	1.1
reinforce_cost_modifier	reinforce_cost_modifier = -0.1	Modifies the cost of reinforcements when units are reinforced.	Multiplicative	1.19
reinforce_speed	reinforce_speed = 0.1	Modifies the rate at which units are reinforced with new men.	Multiplicative	1.1
manpower_recovery_speed	manpower_recovery_speed = 0.1	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 = 0.1	Modifies a country's total manpower pool.	Multiplicative	1.1
global_regiment_cost	global_regiment_cost = -0.1	Modifies the base unit cost for all land units.	Multiplicative	1.1
global_regiment_recruit_speed	global_regiment_recruit_speed = -0.1	Modifies the base speed at which land units are recruited.	Multiplicative	1.1
global_supply_limit_modifier	global_supply_limit_modifier = 0.33	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 = -0.1	Modifies a country's force limit.	Multiplicative	1.1
land_maintenance_modifier	land_maintenance_modifier = -0.1	Modifies the maintenance cost of all land units.	Multiplicative	1.1
mercenary_cost	mercenary_cost = -0.1	Modifies the base cost for mercenary units.	Multiplicative	1.1
merc_maintenance_modifier	merc_maintenance_modifier = -0.1	Modifies the maintenance cost of all mercenary units.	Multiplicative	1.1
possible_condottieri	possible_condottieri = 0.5	Modifies the base condottieri limit.	Multiplicative	1.16
possible_mercenaries	possible_mercenaries = 0.5	Modifies the base mercenary limit.	Multiplicative	1.1
hostile_attrition	hostile_attrition = 1	Adds to the attrition enemies take in a country's provinces.	Additive	1.1
garrison_size	garrison_size = 0.1	Modifies the base garrison size in provinces.	Multiplicative	1.12
global_garrison_growth	global_garrison_growth = 0.1	Modifies the base garrison growth in provinces.	Multiplicative	1.1
fort_maintenance_modifier	fort_maintenance_modifier = -0.1	Modifies the base fort maintenance cost.	Multiplicative	1.12
rival_border_fort_maintenance	rival_border_fort_maintenance = -0.1	Modifies the base fort maintenance cost for forts in provinces that border rivals.	Multiplicative	1.20
war_exhaustion	war_exhaustion = -0.1	Adds to the monthly war exhaustion rate.	Additive	1.1
war_exhaustion_cost	war_exhaustion_cost = -0.1	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 = -0.1	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 = 0.1	Modifies the amount of monarch power gained from razing.	Multiplicative	1.14
loot_amount	loot_amount = 0.1	Modifies the amount of loot taken at once during looting.	Multiplicative	1.12
prestige_from_land	prestige_from_land = 0.1	Modifies the prestige bonus from combat.	Multiplicative	1.11
amount_of_banners	amount_of_banners = 0.1	Modifies the maximum amount of banners available.	Multiplicative	1.20
war_taxes_cost_modifier	war_taxes_cost_modifier = -0.1	Modifies the military power cost for raising war taxes.	Multiplicative	1.20
leader_cost	leader_cost = -0.1	Modifies the military power cost for hiring leaders.	Multiplicative	1.26

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 = -0.1	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
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. (discipline for 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 manuever 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

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.	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

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 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
free_policy	free_policy = 1	Modifies the amount of policy slots.	Additive	1.26

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 effect 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 effect 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 effect 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

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
max_states	max_states = 5	Adds to the maximum number of states a country can support.	Additive	1.16
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_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
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

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.	Multiplicative	1.26

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	Adds to the subject liberty desire from development against their overlord.	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
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

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

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

Province modifiers

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

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
cs_only_local_development_cost	cs_only_local_development_cost = -0.25	Modifies the monarch power cost for development in a province. Does not appear or affect non-Common Sense owners.	Multiplicative	1.23

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
religious_conversion_resistance	religious_conversion_resistance = 0.1	Adds to conversion resistance from Centres of Reformation.	Additive	1.20

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_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
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 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
may_perform_slave_raid	may_perform_slave_raid = yes	Allows ships to perform slave raids.	Constant	1.16
may_recruit_female_generals	may_recruit_female_generals = yes	Allows the recruitment of female generals.	Constant	1.11
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

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

Modding

Audio

Music • Sound

Guides

Adding a province