Revenue and taxation; vehicle excise tax; value; effective date; emergency.

HB 1550 changes how Oklahoma calculates vehicle excise tax by basing a vehicle's taxable value on its odometer reading relative to average retail prices. It requires the taxable value to be within 20% of retail for vehicles under 100,000 miles, 40% for 100,000-200,000 miles, and 50% for over 200,000 miles. This directly affects vehicle buyers and sellers, as the actual sales price (before trade-in discounts) must be documented on the bill of sale. The bill takes effect July 1, 2025, and is designated as an emergency measure.