Champart (French pronunciation: [ʃɑ̃paʁ]) was a tax in Medieval France levied by landowners on tenants. Paid as a share of the harvest, the amount due varied between one sixth and one twelfth, and typically one eighth of the cereal crop.
Regional names for champart included arrage, gerbage, parcière, tasque, and terrage.
Beginning in the early modern period, champart was converted into a cash rent, first in the Île-de-France region.