Crusader Kings III 1.20.1.2
Domain, vassal & duchy limits
How much a ruler can hold before the game takes something back: the domain and vassal limit of each title tier, the held-duchies penalty and the duke's county limit — every number with the define or modifier it comes from.
In Crusader Kings III a ruler of king tier or above may hold 2 duchies before vassals take -15 opinion per duchy too many (MAX_DUCHIES_BEFORE_PENALTY, TOO_MANY_DUCHIES_OPINION); a player of duke tier or lower loses 5% income per county above 30 in the realm; each holding over the domain limit takes 20% off domain tax and 20% off levies, and the tier modifiers give a domain limit of 1 (baron), 2 (count), 2 (duke), 3 (king), 4 (emperor), 5 (hegemon). Patch 1.20.1.2, from game/common/defines/00_defines.txt and game/common/modifiers/00_basic_modifiers.txt.
This section as JSON: /raw/game-rules.json
Too many held duchies (the duchy limit)
2 duchies may be held before vassals mind; -15 opinion for each duchy too many.
| Define | Value | The comment beside it in the file |
|---|---|---|
| NCharacterOpinion.MAX_DUCHIES_BEFORE_PENALTY | 2 | How many duchies are vassals fine with you having? If you're a duke, they don't care; only if you're king or above |
| NCharacterOpinion.TOO_MANY_DUCHIES_OPINION | -15 | Penalty per duchy too many |
| NCharacterOpinion.COUNT_LIEGE_HOLDS_MY_DUCHY | -25 | Penalty with count vassals for whom you hold their dejure duchy (and you're above duchy tier) |
Domain and vassal limit by title tier
| Tier | Domain limit | Vassal limit | Knights | Modifier |
|---|---|---|---|---|
| Baron | +1 | — | — | baron_modifier |
| Count | +2 | — | +1 | count_modifier |
| Duke | +2 | +20 | +2 | duke_modifier |
| King | +3 | +40 | +3 | king_modifier |
| Emperor | +4 | +60 | +4 | emperor_modifier |
| Hegemon | +5 | +80 | +9 | hegemon_modifier |
The tier modifiers of game/common/modifiers/00_basic_modifiers.txt, whose comment says they are applied to characters of that tier. The Domain Limit game rule moves the domain limit by up to 3 either way.
Every source of domain limit →domain limit in the game's encyclopedia →
Every source of vassal limit →vassal limit in the game's encyclopedia →
Over the domain limit
| Define | Value | The comment beside it in the file |
|---|---|---|
| NDomain.ABOVE_LIMIT_TAX_INCOME_PENALTY | 0.2 (20%) | How much tax income from domain is reduced per holding over the limit |
| NDomain.ABOVE_LIMIT_MAX_TAX_INCOME_PENALTY | 1 (100%) | How much tax income from domain can be reduced at most |
| NDomain.ABOVE_LIMIT_LEVY_PENALTY | 0.2 (20%) | How much levies are reduced per holding over the limit |
| NDomain.ABOVE_LIMIT_MAX_LEVY_PENALTY | 1 (100%) | How much levies can be reduced at most |
| NDomain.ABOVE_LIMIT_HERD_INCOME_PENALTY | 0.5 (50%) | How much herd income from domain is reduced per holding over the limit |
| NDomain.ABOVE_LIMIT_MAX_HERD_INCOME_PENALTY | 1 (100%) | How much herd income from domain can be reduced at most |
| NDomain.ABOVE_LIMIT_BARTER_GOODS_INCOME_PENALTY | 0.2 (20%) | How much Barter Goods are reduced per holding over the limit |
| NDomain.ABOVE_LIMIT_MAX_BARTER_GOODS_INCOME_PENALTY | 1 (100%) | How much Barter Goods can be reduced at most |
| NDomain.HOLDING_GRACE_PERIOD | 365 | How many days do newly gained holdings not count towards the domain size for the purposes of penalties (but also not produce any levies) |
| NDomain.STEWARDSHIP_SKILL_FOR_DOMAIN_LIMIT_INCREASE | 200 | domain limit += floor( <stewardship skill> / STEWARDSHIP_SKILL_FOR_DOMAIN_LIMIT_INCREASE ) |
Over the vassal limit
| Define | Value | The comment beside it in the file |
|---|---|---|
| NSubjectContract.ABOVE_LIMIT_TAX_INCOME_PENALTY | 0.05 (5%) | How much tax income from domain is reduced per vassal over the limit |
| NSubjectContract.ABOVE_LIMIT_MAX_TAX_INCOME_PENALTY | 0.95 (95%) | How much tax income from domain can be reduced at most |
| NSubjectContract.ABOVE_LIMIT_LEVY_PENALTY | 0.05 (5%) | How much levies are reduced per vassal over the limit |
| NSubjectContract.ABOVE_LIMIT_MAX_LEVY_PENALTY | 0.95 (95%) | How much levies can be reduced at most |
| NSubjectContract.ABOVE_LIMIT_HERD_INCOME_PENALTY | 0.05 (5%) | How much herd income from domain is reduced per vassal over the limit |
| NSubjectContract.ABOVE_LIMIT_MAX_HERD_INCOME_PENALTY | 0.95 (95%) | How much herd income from domain can be reduced at most |
Counties in a duke's realm
| Define | Value | The comment beside it in the file |
|---|---|---|
| NCharacter.MAX_COUNTIES_IN_REALM_AS_DUKE | 30 | As a duke or below, the player (but not the AI) will suffer penalties when they go beyond this # of counties in their realm. They can form a kingdom to get the penalties to go away |
| NCharacter.INCOME_PENALTY_PER_COUNTY_ABOVE_LIMIT | 0.05 (5%) | For each county above MAX_COUNTIES_IN_REALM_AS_DUKE, you get 10% less incomeThe comment says 10%; the value is 0.05 (5%). |
Source: game/common/defines/00_defines.txt (NCharacterOpinion, NDomain, NSubjectContract, NCharacter) and game/common/modifiers/00_basic_modifiers.txt, Crusader Kings III 1.20.1.2. The comments are the developers', quoted as written; where a comment and its value disagree, the game uses the value.