Montana Gas Tax
Near the Middle
Montana charges 33.75 cents per gallon in state tax, ranking 18 of 50, which is near the middle nationally. With the federal 18.40 cents added, a driver pays 52.15 cents per gallon in tax. Diesel is taxed at 30.50 cents.
What “Near the Middle” means
State gas tax in the middle third of the country.
16 of 50 states are in the same category
Alongside Montana: Alabama, Colorado, Idaho, Iowa, Kentucky, Maine, Massachusetts, Minnesota, Missouri, Nebraska, South Carolina, South Dakota, and 3 more.
Source: Tax Foundation · as of 2026 · last verified September 24, 2026
See every state in our gas tax tracker, or everything we track for Montana.
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