A province at 50-60% autonomy for example, could be a province where the government has little to no power and leaves all its issues to the local populace. However, in return, that province will offer less to the government itself as shown below. Its effects make the integration of conquered provinces more gradual and offer the ruler a choice in its pace, and simulate the limits to central rule in faraway overseas provinces.
Local autonomy applies multiplicatively, rather than additively. This majorly impacts how local autonomy affects a nation. A +50% manpower boost in a 50% autonomy province would thus yield an increase of only 25%. Giving a province to an estate (requires The Cossacks expansion) results in autonomy not affecting the values associated with that particular estate
It is advised to keep autonomy at a low point, as the negative modifiers get worse over time added together with buildings or ideas, since these are additive as well. Autonomy especially affects tax base, because of the multiple additive percentage modifiers affecting tax.
Each percentage point of local autonomy has the following effects on the province:
|−1.0%||Local manpower modifier|
|−1.0%||Local sailors modifier|
|−1.0%||Local tax modifier|
|−1.0%||Local production efficiency|
|−0.5%||Local trade power|
|−1.0%||Land force limit modifier|
|−1.0%||Naval force limit modifier|
|−0.33%||Province warscore cost|
The effect of autonomy on province warscore cost is added after all positive warscore cost modifiers are added.
When annexing a province, its autonomy level will be set to a fixed amount, unless it is already at a higher level:
- Diplomatic annexation of a subject: 60% on provinces the overlord has no pre-existing core on
- Conquest of a province the conquering nation does not have a claim on: 50%
- Conquest of a province the conquering nation has a claim on: 40%
- Reconquest of a province the conquering nation has a core in: 0%
- Inheriting a kingdom through personal union: 0%
A nation's capital province will always have a local autonomy of 0%.
In some cases, a province will have a minimum autonomy. Local autonomy can never be lower than:
- 25% for a province granted to an estate (except the Tribes).
- 50% for a province granted to the Tribes estate.
- 50% for a province in a state with only a territorial core.
- 75% for a province in a territory, unless in a trade company.
In provinces with a minimum autonomy modifier, there is also a “hidden” level of autonomy that could be lower. This “hidden” autonomy declines over time, although it is not displayed in the game. For example, the player conquers a province where the player has a claim, and the provinces initial autonomy (before conquering) was below 40%. Since the player has a claim on that province, real (but “hidden”) autonomy is set to 40%. But if the province is a territory, its minimum autonomy will be 75%.
NB: If the player chooses to raise autonomy while the province is still a territory, from 75% → 100% then the virtual autonomy will be raised to 100% too! If the player waits until the province is cored and made a state, its minimum autonomy floor will be removed, lowering the province autonomy to its virtual value, which is either 40% if there is a claim, and 50% if there isn't a claim. Now the player can raise autonomy to 65%/75% without suffering an extra +25% autonomy unspoken "penalty", the same principle applies if a province is owned by a state.
If the local autonomy of a province is currently 75% or lower, the province owner may increase its local autonomy level by +25% in exchange for -10 unrest. Local autonomy can also be decreased by -25% at the cost of +10 unrest provided it's not below 10% autonomy. The decision to change autonomy levels will be in effect for 30 years, during which time the autonomy cannot be actively adjusted again. This cooldown may be reduced by 50% with the ‘Efficient Autonomy’ ability during the ‘Age of Absolutism’. (Note: Ongoing cooldowns are not affected.) If a province changes owners, both the modifier from adjusting autonomy and the timer are reset.
Monthly factors that can change autonomy include:
Completing missions and some events can also give adjustments to local autonomy.
Further, some actions can directly affect the autonomy of a province:
|Peasant, particularist, noble, pretender, or heretic rebels successfully sieging a province||+10 autonomy|
|Non-enforcement of Ordinances||+15 autonomy|
|Accepting the demands of peasant, noble, heretic, ronin, or ikko-ikki rebels||+20 autonomy in all provinces|
|Accepting the demands of particularist rebels||+30 autonomy in all provinces|
|Granting a province to an estate||autonomy will be minimally set to 25%|
- See in Static modifiers#Local autonomy). (
- See in : AUTONOMY_WARSCORE_COST_MODIFIER = 0.33, -- How much autonomy reduces score by (at 1, 50% autonomy = 50% reduction)