IFTA Tax Rates in Wyoming (2026)

Key numbers at a glance

IFTA tax rates in Wyoming

Rates below are as of Q4 2026 — confirm the current official IFTA matrix before filing. Wyoming is jurisdiction code 56 on your IFTA return.

That alternative-fuels row deserves a beat: beginning January 2026, Wyoming collects 24 cents per gasoline gallon equivalent or diesel gallon equivalent on alternative fuel, per the DOE's Alternative Fuels Data Center — the state applies the same low rate no matter what powers the truck. Wyoming's flat 24 cents has also held for years; a 2021 legislative proposal to phase in a 9-cent increase died, and nothing since has moved the number. The consequence for planners: Wyoming lines on your IFTA return are the most stable and cheapest in the region, and comparisons are stark — the same 1,000 miles at 6.5 MPG that cost $36.92 in Wyoming cost $59.23 in Utah, $54.92 in West Virginia, $51.69 in Virginia and $91.54 in Washington. See all 49 jurisdictions on the IFTA rates by state hub.

Per mile, Wyoming's diesel tax runs about 3.7 cents at 6.5 MPG. A 400-mile day across the state accrues barely $15 of state fuel tax — which is why I-80 carriers focus their optimization on pump prices and out-of-state legs, not Wyoming's tax line. Price your own lanes with the IFTA calculator.

How Wyoming IFTA affects your filings

Wyoming's low rate changes the direction of the classic IFTA play. Because you owe only 24 cents on Wyoming-burned gallons, fueling in a higher-tax state just before the Wyoming leg means you prepay — say, 38.5 cents in Utah or 59.5 in Washington — and the excess above 24 comes back to you as credit on the quarterly return. Fueling inside Wyoming and then immediately burning high-tax miles in a neighbor does the reverse and manufactures a balance due. The rule never changes: compare pump price minus each state's rate and look ahead on the route.

Administration runs through the Wyoming Department of Transportation, whose fuel tax pages publish the official rates for gasoline, undyed and dyed diesel, aviation fuels and CNG. If Wyoming is your base state, WYDOT is where your IFTA account and decals live; if you are passing through, your ELD or GPS miles for jurisdiction code 56 are what auditors will reconcile against receipts. Keep four consecutive quarters of records matched — receipts to miles, miles to returns. Deadlines are fixed, and zero-net quarters still file:

Two Wyoming-specific habits pay. First, winter: mountain miles in snow burn more gallons per mile, and even at 24 cents the tax line grows with the gallon count — track MPG by season, not annually. Second, accrual: about 3.7 cents per mile should be building in your cost model and being recovered through your fuel surcharge collections. Verify current figures on the WYDOT fuel tax rates page, the Alternative Fuels Data Center or the IFTA Inc. matrix before each filing.