OK SB1842

County treasurers may offer taxpayers a 12-month installment prepayment option for ad valorem property taxes, with payments due by the 15th of each month (or December 31st for the final payment)

Prepayment option is not available for accounts with delinquent taxes, ongoing valuation protests, escrow-paid taxes, or public service corporations

Taxpayers must notify the county treasurer in writing between December 1 and January 15 to elect or opt out of the prepayment option

Prepayments are deposited into a "Property Tax Prepayment Fund" trust account; interest earned offsets administrative costs via the County Treasurer's Mortgage Certification Fee Account

Overpayments must be refunded within 60 days of the final installment; taxpayers may request a full refund of all installments within 10 business days; effective date is November 1, 2026