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Rooting out corruption.

Corruption.png Corruption measures a country's bureaucratic morality throughout the ranks. A country with high corruption suffers widely from embezzlement and loss of the leader's authority, while a country with no corruption is free to prosper. Unlike inflation, corruption does not directly affect monetary costs, instead affecting other areas of the state (though it may indirectly affect income due to raising the local autonomy floor of provinces).


Every point of corruption gives the following:[1]

Foreign spy detection.png −25% Foreign spy detection
Spy network construction.png −50% Spy network construction
All power costs.png +100% All power costs
Minimum autonomy.png 50% Minimum autonomy
National unrest.png −20 National unrest
Mandate.png −1 Imperial mandate

Eliminating corruption enables beneficial Corruption events, while increasing corruption enables increasingly bad events. Corruption also increases the amount of monarch power which can be stored at the same level as the respective power cost increase.

Increased by[edit]

  • Overextension.png +0.005% per year for every point of Overextension, +0.5% per year at 100% overextension.
  • Religious unity.png +0.001% per year for every point of religious unity below 100%, +0.1% per year at 0% religious unity.
  • Technology.png +0.5% max per year for unbalanced research.
  • Parliament.png +0.1 per year for not having an active debate in Parliament.
  • Corruption.png +2% immediately by “Debasing Currency” (only with Rights of Man.png Rights of Man).
  • Corruption.png +0.02% per territory over max number of states (capped at +0.8%).
  • Corruption.png +1% max perPossible Manchu banners.pngBanners regiment raised, divided by country's force limit (only with Mandate of Heaven.png Mandate of Heaven).

Decreased by[edit]

  • Icon stability.png -0.02% per point of stability per year
  • Local tax modifier.png Maximum of -1% per year for “rooting out corruption”, which is controlled with a maintenance slider on the economy tab. Reducing corruption costs 0.05 Gold Icon.png ducats per month per total effective development (which is modified by autonomy) for maximum effect. (This can be lowered if the player chooses, although reducing expenditure will decrease the corruption reduction proportionally.)
  • Diplomatic tech.png -0.05% per year for being ahead of time in diplomatic technology.
  • Administrative tech.png -0.05% per year for being ahead of time in administrative technology.
  • Corruption.png -2.00% With pressing islamic nation’s Enforce Faithful Adherence having 75 or more Piety piety
  • Various ideas, traditions, and policies:
Corruption.png Traditions Ideas Bonuses Policies
−0.1 yearly
  • Espionage idea 7: Audit Checks
  • Ajami idea 6: Reform the Diwan
  • Russian idea 5: Abolish the Mestnichestvo
  • Sindhi idea 5: End Judicial Corruption
  • Timurid idea 7: Reform the Diwan
  • Defensive-Administrative: The Spy Discovery Act
  • Espionage-Administrative: The Royal Commission Act
  • Espionage-Defensive: The Privy Council Establishment Act


  1. See in /Europa Universalis IV/common/static_modifiers/00_static_modifiers.txt (Static modifiers#Corruption).