Culture builder: tradition costs
Plan a hybrid or divergent culture, or the next tradition to adopt: choose the ethos and heritage, pick traditions and see the prestige each one costs with the game's own formula. The link in the address bar keeps your choices.
Loading the game's traditions…
How the cost is counted
Each tradition's cost = { prestige = { … } } in common/culture/traditions starts at tradition_base_cost (2,000; a few at tradition_double_base_cost, 4,000), adds tradition_incompatible_ethos_penalty (2,000) when your ethos isn't one the tradition suits, and tradition_unfulfilled_criteria_penalty (3,000) for each requirement you don't meet (terrain, knights, rulers with a trait…). Being inspired by a neighbouring culture that has the tradition halves it, and replacing an existing tradition multiplies it by tradition_replacement_cost_factor (1.5). Values from common/script_values/00_culture_values.txt, patch 1.20.0.3.
Not included: The Kurultai discount of a nomad culture head (Khans of the Steppe) is not included. The maximum number of traditions and whether a tradition can be picked at all (its own requirements) are checked by the game when you choose. Every tradition's effects are on the traditions pages.