Choose Confederate Partition when you are still unlocking innovations and can survive a divided inheritance. Move to Primogeniture as soon as its innovation and law conditions are met if keeping the realm together is your priority. Choose an Elective law only when you can reliably control the electors and acceptable candidates.
The laws differ on four practical questions: what happens to titles when your ruler dies, when the law becomes available, how much control you have over the successor, and what failure looks like. Partition can split a realm, Primogeniture sends every title to the oldest eligible child, and Elective replaces inheritance certainty with a political contest.
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What each succession law does at your ruler’s death
Succession is not just a family-tree setting in Crusader Kings III. It determines which titles survive under the player heir, which relatives become independent or landed rivals, and whether the next ruler starts with a coherent realm or a collection of competing branches.
The exact law can be attached to the realm or, in the case of title succession laws, to an individual title. Read the succession panel for every important kingdom or empire before you commit to a plan: a title-level elective law can produce a different heir from the law governing the rest of your realm.
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Confederate Partition
Under Confederate Partition, titles are divided between eligible children. The player heir receives the primary title, the realm capital, and the direct de jure titles associated with that primary title. Younger eligible children receive other titles, beginning with titles at the primary heir’s rank when those are available and then moving to lower-ranking titles.
The distinctive danger is that Confederate Partition can create titles at death. If you hold enough land to satisfy a title’s creation requirements, the game can create that title for a younger child and grant it to them as part of the succession. You therefore can lose territory even when you did not manually create a second kingdom or duchy. Tribal rulers are locked to this succession type. The current law entry records a 500-prestige base cost in CK3 Database’s 2026 data for patch 1.20.1.1; treat that figure as patch-sensitive and verify the tooltip in your own version. See the current Confederate Partition effects and cost.
Regular Partition and High Partition are separate laws in the same succession-law family. Moving away from Confederate Partition removes the automatic title-creation behavior documented for the confederate version, but the precise title shares depend on the active law and patch. Open the law tooltip before assuming that a particular child will receive a particular county, duchy, or kingdom.
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Primogeniture is single-heir succession: the oldest eligible child receives all titles, while younger children receive none through the succession law. This is the most predictable option for preserving a centralized realm because the game does not divide your titles among multiple children. The law’s current entry defines the player heir as the oldest eligible child and states that all titles pass to that heir. Check the current Primogeniture effects and cost.
That certainty does not mean the eldest child is always a good ruler. An incapable, unpopular, or politically weak firstborn still inherits unless you change the succession outcome through another valid game mechanic. Primogeniture solves title division; it does not solve every problem with the person who inherits.
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- Groom your heir with the appropriate guardians or educate them yourself. If found wanting, marry them off or despatch them through other means.
The current database entry lists a 500-prestige base cost for changing to Primogeniture in patch 1.20.1.1, while other costs such as piety can vary by context. The number is therefore a reference point, not a universal price for every government and situation.
Elective succession
Elective succession turns inheritance into a vote for a particular title. Under Confederation Elective, the ruler and all direct vassals can nominate a title heir from eligible close family and vassals. Voting strength is primarily affected by fame, devotion, and the number of count-tier vassals. The current law entry lists a 500-prestige base cost in patch 1.20.1; eligibility and costs can change with the game version. Review the current Confederation Elective rules.
Elective can let you bypass an unsuitable eldest child and place a more capable relative on a strategically important title. It is less predictable than Primogeniture because the preferred nominee can lose. It is also title-specific: a kingdom, duchy, or other title with its own succession law can produce a different result from your realm’s principal law.
Side-by-side comparison
| Axis | Partition | Primogeniture | Elective |
|---|---|---|---|
| Realm cohesion after death | Lower. Titles are divided; Confederate Partition can create new titles for younger children. | Highest. All titles pass to the oldest eligible child. | Variable. Cohesion depends on the winning candidate and the titles covered by the vote. |
| Availability | Common in early feudal or tribal play; tribal rulers are locked to Confederate Partition. | Later access, requiring the primogeniture innovation or a historical access trigger, plus government-specific law conditions. | Depends on the particular title law, government, culture, and eligible electors. |
| Player control | You can arrange titles and heirs before death, but division remains part of the law. | Predictable once the eldest eligible child is acceptable. | Potentially high when you control electors and candidates, but the ballot can still go against you. |
| Main failure mode | Fragmentation and powerful landed siblings who become rivals. | Delayed access or an undesirable eldest heir. | Losing the election or electing a candidate who weakens the realm. |
How to survive Confederate Partition
Partition is often the law you have rather than the law you want. Treat the ruler’s lifetime as preparation for a smaller, more manageable succession rather than assuming that every current title will remain under one crown.
1. Identify the actual player heir
Open the succession or realm panel and confirm which child is currently eligible to inherit the primary title. Eligibility can change during a ruler’s life, so check again after births, deaths, marriages, disqualifications, or changes to title laws. Do not plan around birth order alone.
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- Discover a sprawling simulated world teeming with peasants and knights, courtiers, spies, knaves and jesters, and secret love affairs.
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- Each character is larger than life, with traits and lifestyle choices determining their actions and schemes.
- Groom your heir with the appropriate guardians or educate them yourself. If found wanting, marry them off or despatch them through other means.
2. Inspect every projected grant
Use the succession preview to see which duchies, counties, and higher titles are earmarked for younger children. Confederate Partition distributes titles by rank when possible, then by lower rank. This preview is more reliable than guessing from the map, especially when several titles share de jure relationships.
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3. Watch for titles that can be created
Count the land you hold toward uncreated kingdoms and other titles. Under Confederate Partition, enough territory can trigger creation of a title for a younger child at death. If preserving a single realm is critical, avoid crossing a creation threshold accidentally and recheck the preview whenever your conquests change the total land held.
4. Keep the core compact
Concentrate your strongest counties, economic buildings, and key duchies around the realm capital and the primary title. Even when a younger child receives land, a compact core gives the player heir the best chance to remain economically and militarily stronger than newly landed siblings.
5. Plan for the next ruler’s first war
A succession split can leave the new ruler with claims, hostile relatives, and reduced levies. Save money, maintain an emergency men-at-arms budget, and avoid entering a major external war immediately before death unless the victory is secure. The goal is to give the heir enough resources to reassert authority after the inheritance is applied.
When to switch to Primogeniture
Primogeniture is the clearest answer to “How do I stop my realm from splitting?” It sends all titles to one eligible child, eliminating the title-sharing behavior of partition. The cost is access: the law is gated behind the innovation_primogeniture culture innovation or a historical access trigger, and the exact change conditions vary by government.
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Check the innovation and law conditions
- Open the culture interface and verify that your culture has the primogeniture innovation, or confirm that your ruler qualifies for a historical access trigger.
- Open the realm’s succession-law panel and read the change requirements for your government. Do not rely on a guide written for another patch or government type.
- Check the prestige requirement and any additional piety or contextual cost shown in the tooltip. The current database entry lists 500 prestige as a base cost in patch 1.20.1.1, but the game’s current panel is authoritative for your save.
- Before confirming the change, inspect the projected heir. Primogeniture makes the oldest eligible child decisive, so verify that child’s age, health, traits, claims, and likely alliances.
Use the waiting period deliberately
Because partition is a common interim law, continue building the realm while the innovation is progressing. Keep the capital and core duchies strong, avoid unnecessary title creation, and prepare succession finances. Once the innovation and legal conditions are met, changing to Primogeniture is most valuable when your realm is large enough that another partition would create serious rivals.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When Elective is better than Primogeniture
Elective is not a universal upgrade. It is a control tool for rulers who understand the electorate and can make the desired candidate acceptable to enough voters.
Use elective for a specific title
Elective works best when the title itself is the strategic objective: for example, a kingdom whose crown must remain with a particular branch of the family. Since title succession can override the realm’s main law, inspect each title separately. A successful vote on one kingdom does not automatically determine succession for every county, duchy, or neighboring kingdom you hold.
Map the electorate
List the ruler and direct vassals who can nominate or vote under the selected law. Then compare the factors that primarily affect voting strength: fame, devotion, and the number of count-tier vassals. A powerful duke with a different preference can matter more than several minor supporters.
Make the preferred candidate viable
Electors choose from the eligible close family and vassal pool defined by the law. Check which relatives qualify before you commit to the system. Improve the preferred candidate’s position through relationships, offices, marriages, and other legitimate political tools available in your current game, while remembering that none guarantees the result.
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Recheck votes before death
Elective outcomes can change as vassals die, titles change hands, fame rises, devotion falls, or a new candidate becomes eligible. Treat the vote as a live political situation, not a one-time setting. Reopen the title’s succession panel after every major succession, war, or vassal reshuffle.
A decision framework for the three laws
Choose Partition if access matters most
Select or retain Confederate Partition when you are early in the technological progression, still tribal, or strong enough to survive a division. It is workable if the realm is compact, younger children can receive harmless peripheral titles, and the player heir will retain the economic and military core.
Choose Primogeniture if cohesion matters most
Move to Primogeniture when the innovation and law requirements are satisfied and your priority is one centralized realm. It is the best default for a large kingdom or empire whose survival depends on keeping its titles and resources under a single successor.
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Choose Elective if control is political
Adopt Elective for a title when you can identify the electors, understand their voting strength, and tolerate the possibility of defeat. It is strongest for rulers who can maintain favorable vassal relations and who have a clearly superior candidate to the eldest child.
Common mistakes and fixes
- Assuming partition only divides existing titles: Confederate Partition can create titles when you hold enough land. Check uncreated-title thresholds and the succession preview.
- Treating Primogeniture as immediately available: It requires the primogeniture innovation or historical access plus the conditions shown for your government. Track the innovation before planning a date for the switch.
- Confusing realm law with title law: An elective title can override the realm’s main succession outcome. Inspect every important title individually.
- Ignoring the word “eligible”: The oldest child is not necessarily the oldest living child; eligibility rules determine who counts for Primogeniture and who can be considered under Elective.
- Trusting an old cost figure: The 500-prestige base figures listed for these laws are tied to CK3 Database patch data from 2026. Confirm the current in-game tooltip before spending prestige.
- Winning the vote but losing the realm: Elective can place a preferred person on one title while other titles follow different laws. Review the full title-by-title succession result, not just the highlighted winner.
Platform and version notes
Crusader Kings III is available through Steam, Microsoft, Xbox Series X, and PlayStation 5 according to the publisher’s game page. Menus and legal conditions can change with patches, and government, culture, title rank, and historical start can all affect availability. Use the law tooltip in the current version of your save as the final authority. See the publisher’s Crusader Kings III overview.
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