Does the EIA publish a diesel price for Montana?

No. The EIA weekly on-highway diesel survey covers the United States, five PADDs, three PADD 1 sub-districts, West Coast less California, and California. Montana is not surveyed, so this page shows Rocky Mountain (PADD 4) and labels it as a district figure.

What is the diesel tax in Montana?

Montana's state diesel tax is 30.5 cents per gallon. Combined with the federal diesel tax of 24.4 cents per gallon, the total tax on a gallon of diesel in Montana is 54.9 cents, or 8 percent of the price shown above. Tax rates are the state's own per-gallon taxes and fees, checked against its revenue department on 22 October 2026, not EIA data.

EIA Weekly On-Highway Diesel Survey - week of October 26, 2026

Diesel cost per gallon in Montana

$6.52/GAL

+0.17 vs US average ($6.35)EIA Rocky Mountain (PADD 4)District #7 of 9

What readers paid for diesel in Montana

Prices readers report from the pump: what they paid, where, and how they paid. Each one is a single fill on the date shown, not a survey average; the weekly EIA figures elsewhere on this page are the survey.

No reader has reported a price in Montana yet. Yours would be the first.

What did you pay for diesel?

Tell us the price at your last fill and see how it compares with the government survey for your state. Your report goes on this site as a dated reader report; we publish your state and the first three digits of your ZIP, nothing else.

ZIP codeYou paid ($/gal)Price on the sign, if differentWhereHow you paid

No account, no email. Prices far outside the usual range for your state are checked before they appear. See our privacy policy.

Read this as a district figure, not a state figure. The EIA weekly on-highway diesel survey prices the United States, its districts and California, and nothing else. It does not price Montana. The number above is Rocky Mountain (PADD 4), series EMD_EPD2D_PTE_R40_DPG, and it is the closest published federal figure for Montana. We do not estimate a price for Montana from it. 2 of Montana's neighbouring states sit in the same district and therefore show the same price below.

EIA does not publish a weekly on-highway diesel price for Montana. The federal survey prices the district Montana sits in, Rocky Mountain (PADD 4), at $6.521 per gallon in the week of October 26, 2026 (series EMD_EPD2D_PTE_R40_DPG), $0.17 above the US average of $6.352. Pump prices inside the district vary around that figure.

Diesel tax breakdown

Special fuel tax (MCA 15-70-403)29.75c/gal

Petroleum tank release cleanup fee (MCA 75-11-314)0.75c/gal

Montana state taxes and fees30.5c/gal

Federal diesel excise tax24.4c/gal

Total per-gallon tax54.9c/gal

As a share of the price above8%

Interstate trucks (IFTA): 29.75c a gallon for October to December 2026.

29.75c since 1 July 2023.

Checked 22 October 2026 against Montana Code 15-70-403. Local and county taxes are not included. The percentage is against the EIA figure shown above, which is a district figure unless Montana is surveyed directly.

Neighbouring states

North Dakota

Midwest (PADD 2)$6.48

South Dakota

Midwest (PADD 2)$6.48

Wyoming

same district$6.52

Idaho

same district$6.52

Neighbours in the same EIA district carry the same published figure. A matching price here means the federal survey shows no measured gap across that border, not that pumps are identical.

Off-road (dyed) diesel in Montana

Red-dyed diesel is the same fuel as clear diesel, sold without highway fuel taxes for uses off the public road. How Montana treats it, checked 25 October 2026. Rules for every state are on the off-road diesel guide.

Temporary relief, 9 October 2026 to 23 November 2026: Enforcement is suspended for commercial agriculture and timber vehicles. (Executive order of 9 October 2026; reported in the news, the order text was not found on an official site).

Federal: dyed diesel skips the federal diesel tax except 0.1c. IRS news release IR-2026-122 (14 October 2026) waives federal penalties for highway use of dyed diesel from 1 October 2026 to 31 December 2026; state rules below still apply.

54.05ca gallon of per-gallon tax skipped: 24.3c federal and 29.75c Montana taxes and fees, though sales tax may apply instead (below).

Montana fuel tax on dyed diesel

Dyed diesel is exempt from Montana's 29.75c special fuel tax, but only if it is dyed by injector at a refinery or terminal; splash-dyed fuel is not exempt. Fuel for public highway construction contracts must be tax-paid.

Sales tax

Montana has no sales tax.

Per-gallon charges dyed diesel still pays

Petroleum storage tank cleanup fee: 0.75c

Who may use it

Off-highway use and government agencies. On the road only for livestock feed trucks with a fixed feed box used only for feeding livestock.

Penalty for highway use

Civil penalty up to $1,000 for a first offence and $5,000 for a second; a third is a misdemeanor (up to $1,000 and 6 months).

Roadside testing

The Montana DOT checks supply tanks for dye.

Buying it

No permit found.

Sources: Montana Code 15-70-403; Montana Code 75-11-314. This is a summary, not legal or tax advice.

CALCULATE YOUR FUEL COST IN MONTANA

The trip calculator starts at $6.52/gal, the EIA figure above. Change it to the price you actually see at the pump for a real answer.

Open trip calculator ->

Sources: price from the EIA Weekly On-Highway Diesel Fuel Price survey, week of October 26, 2026, series EMD_EPD2D_PTE_R40_DPG, a U.S. Government work in the public domain. EIA publishes no diesel price for 49 of the 50 states on this site, California being the exception; those pages show the EIA district figure and say so. State taxes checked against each state's revenue department or statute on 22 October 2026 (sources in the tax breakdown above). Actual pump prices vary by retailer and location.

- US average - All states and districts - Trip calculator - Diesel vs gas - Fleet cards