MO HB3538

Creates the "Motor Fuel Tax Fund of 2021" as a special trust fund to hold proceeds from the phased-in motor fuel tax increases enacted under subsection 3 of section 142.803

Requires all refunds issued to taxpayers claiming the motor fuel tax exemption under section 142.822 to be paid from this new fund rather than general revenues

Directs that any unclaimed moneys remaining in the fund after the refund claim period expires (September 30 following each fiscal year) shall be subject to appropriation by the General Assembly specifically for road and bridge projects on state-owned infrastructure

Maintains existing tax rates: 17 cents per gallon base rate for motor fuel, plus the phased-in additional tax reaching 12.5 cents per gallon as of July 1, 2025

Preserves the existing refund process allowing taxpayers with vehicles 26,000 pounds or less to claim full exemption from the phased-in additional fuel tax by filing claims between July 1 and September 30 following each fiscal year