IFTA Tax Rates in Missouri (2026)

Key numbers at a glance

IFTA tax rates in Missouri

The rates below are what your base state applies to Missouri miles when processing your quarterly IFTA return. Figures are as of Q4 2026 — confirm the current official IFTA matrix before filing, since rates across the region moved repeatedly during the 2021–2026 phase-in.

The phase-in, on one line: Senate Bill 262 (2021) started at 17 cents and added 2.5 cents every October 1 — 19.5 cents in 2021, 22 cents in 2022, 24.5 cents in 2023, 27 cents in 2024 and 29.5 cents from October 1, 2025, a 12.5-cent total increase. No further steps are scheduled; the next change requires new legislation. Two Missouri-specific notes: the law preserved refunds of the incremental increase (the amount above the old 17 cents) for off-road users such as agriculture, and the state's Rate Commission reviews the rate's adequacy for roads — reviews can feed future proposals but do not change the tax by themselves. The Tax Foundation's July 2026 table shows an all-in Missouri figure near 30 cents including minor fees; the 29.5-cent motor fuel tax is the number that flows through IFTA.

How Missouri IFTA affects your filings

Every gallon burned on Missouri roads is taxed at 29.5 cents regardless of where you bought it. The math: Missouri miles ÷ fleet MPG × 29.5 cents. At 6.5 MPG, Missouri costs 4.54 cents per mile in fuel tax — 500 miles means 76.9 taxable gallons and $22.69 owed. A carrier running 10,000 Missouri miles a quarter at 6.5 MPG owes roughly $454 before pump credits.

Missouri's position in the middle of the country is what makes it interesting: eight states border it (Iowa, Illinois, Nebraska, Kansas, Oklahoma, Arkansas, Tennessee, Kentucky), so most Missouri-based carriers file returns touching six or more rate jurisdictions every quarter. Missouri fuel receipts carry the full 29.5-cent credit, and because Missouri is cheaper than Iowa and Nebraska and far cheaper than Illinois, buying at home before crossing those lines is usually the right default. The audit side is standard: receipts matched to distance records (ELD or GPS trip reports), quarterly MPG recomputed, returns filed on time even at zero net — late filings typically draw $50–$100 penalties plus interest, and repeated misses can suspend the license.

Keep the whole pipeline honest with the IFTA calculator for per-state estimates and the fuel surcharge guide for billing shippers the fuel cost itself.

Fueling strategy: Missouri versus its neighbors

Missouri is mid-pack at home but surrounded by extremes — Illinois is far more expensive, Oklahoma and Kansas cheaper. Neighbor rates below are per gallon, per the Tax Foundation's July 2026 state table (Missouri shown from the Department of Revenue rate above).

The play: on I-70 or I-44 lanes, top the tanks in Missouri before entering Illinois — the 48.4-cent diesel gap is one of the largest in the country, worth about $74 per 100 gallons. Southbound on I-44 toward Tulsa or Joplin lanes, Oklahoma's 20 cents is the cheapest diesel in the region, so fuel there before re-entering Missouri miles; running Missouri miles on Oklahoma fuel leaves 9.5 cents per gallon due at filing (about $14.60 per 1,000 Missouri miles at 6.5 MPG). Compare pump price minus tax, never sticker price. Track every jurisdiction on the IFTA rates by state hub, confirm quarterly numbers in the IFTA Clearinghouse rate matrix, and pull Missouri's official figures from the Missouri Department of Revenue motor fuel page.