Montana Gas Tax (2026)

Info: 33.0 cents/gallon state gasoline tax (unchanged); excludes the 18.4c federal tax.

InfoVerified May 31, 2026

Tax rules change at the state line — and in your state.Track them in the free LawLert iPhone app: it alerts you when you cross into a state where they differ, and when they change in your state. No account.Get the app

Official source: mdt.mt.gov →

General legal information, not legal advice — verify important decisions with a licensed attorney.

Gas Tax in states bordering Montana

The same rule in each neighboring state LawLert has verified, from that state’s own official source.

IdahoInfo
About 33 cents/gallon state gasoline tax (32c excise + 1c petroleum transfer fee), excludes the 18.4c federal tax.
Verified May 31, 2026 · Source: tax.idaho.gov · Full Idaho rule →
North DakotaInfo
23.0 cents/gallon state gasoline tax for 2026; excludes the 18.4c federal tax.
Verified Aug 2, 2026 · Source: tax.nd.gov · Full North Dakota rule →
South DakotaInfo
30.0 cents/gallon in state taxes & fees (28c excise + 2c tank-inspection fee); excludes the 18.4c federal tax.
Verified May 31, 2026 · Source: dor.sd.gov · Full South Dakota rule →
WyomingInfo
24.0 cents/gallon state gasoline tax (23c excise + 1c license/cleanup fee); excludes the 18.4c federal tax.
Verified May 31, 2026 · Source: dot.state.wy.us · Full Wyoming rule →

Don't get caught off guardCross into a state where this law is different and the free iPhone app tells you what changed, even with the app closed. It also alerts you when a law you track changes where you live. No account.Get the free app

Track this law — get alerted when it changes

We watch the official sources behind Montana taxes rules. If a tracked rule changes, you get one short email — never more than one a week. Free, unsubscribe anytime.