Chauth (from Sanskrit: चतुर्थ, romanized: caturtha, lit. 'one fourth') was a regular tax or tribute imposed from the early 18th century by the Maratha Empire in the Indian subcontinent. It was an annual tax nominally levied at 25% on revenue or produce, hence the name, on lands that were under nominal Mughal rule. The sardeshmukhi was an additional 10% levy on top of the chauth. A tribute paid to the king, it was started by Koli Maharaja Som Shah of Ramnagar.
Opinions on the function of the chauth vary. According to M G Ranade, the chauth was charged to provide armed security for a state by the Marathas and is thus comparable to the system of subsidiary alliances that was used by Lord Wellesley to bring Indian states under British control.