Revenue and taxation; ad valorem; depreciation schedule; fair cash value; farm equipment and farm tractors; Oklahoma Tax Commission; effective date.

HB 3178 changes how farm equipment and tractors are valued for property tax in Oklahoma. It requires county assessors to apply a specific 25% annual depreciation schedule: 75% of original cost in year one, 50% in year two, 25% in year three, and zero value from year four onward. This applies to equipment used in agricultural production on farms owned, leased, or operated by the owner. The bill affects Oklahoma farmers who own qualifying equipment by reducing their property tax burden after three years. It takes effect January 1, 2027.