What is the decay rate for influence over City-States?



  • On normal speed, I've seen the decay rate for my city-state relations vary from 1 to 2.5 (without the social policy modifier).

    I think it is based on how nice I am to all the other city states, but haven't really figured out the exact formula. Is it based on their personality (Friendly, Hostile, Neutral, or Irrational)? Does pledging to protect them help?



  • The default rate is 1/turn, for hostile city states it is 1.5/turn.

    It can be reduced by 25% with the patronage social policy and by 50% with the Greek unique ability.

    Another factor is the social policy "United Front" from the Order tree, it increases the rate of decay for other players by 33% (thanks to Raven Dreamer).

    If you conquer too many city states they will band together to defend against you (you'll get a notification about that). At this point, influence with non-hostile city states will decay 100% faster. Curiously, influence with hostile city states decays at the usual rate, so they are actually cheaper then. Beware that you don't need to attack many city states to trigger this event, 2 city states on normal size/Prince triggered it already. (Thanks to Sean)

    I've checked some other factors using FireTuner, and neither map size, difficulty level nor current era seem to influence the decay rate.



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