Short answer
Montana has no state sales tax on vehicle purchases, but buying here does not make the deal tax-free: tax is owed where the vehicle gets registered. No sales tax in Montana, so trade-in treatment does not apply. Montana has no state sales tax on vehicle purchases. No sales tax is owed at registration in Montana. Everything here assumes a retail purchase from a dealer, since most states treat leases and private-party sales differently.
Montana car sales tax quick facts
Last verified September 17, 2026| Sales tax rate on vehicles | 0%, no local add-ons[1] |
| Trade-in credit | No sales tax in Montana, so trade-in treatment does not apply.[1] |
| Selling to an out-of-state buyer | Montana has no state sales tax on vehicle purchases.[1] |
| Credit for tax paid to another state | No sales tax is owed at registration in Montana.[1] |
| Dealer doc fee | Cap: being verified · not taxable[1] |
| Temp tag for the drive home | Montana runs temporary registration permits rather than paper dealer tags. The permit lets the buyer operate the vehicle for 40 days from the date the record is issued, or until the vehicle is registered, whichever comes first, which is the window an out-of-state buyer has to drive home and title in their own state. The permit fee is $24.50 when issued to a non-resident who acquires a vehicle in Montana, and the permit holder must title and register the vehicle in Montana or another jurisdiction before ownership can be transferred again.[2] |
| Out-of-state buyer registration | Montana ties registration to living or working in Montana, so an out-of-state buyer does not plate the car here. Under 61-3-701 through 704, MCA, a non-resident who is gainfully employed in Montana registers with the County Treasurer by presenting the current out-of-state registration and paying taxes or fees in lieu of taxes plus registration fees (may be paid by calendar quarter), and the vehicle then carries both the home-state plate and a Montana decal. Those registration-purposes-only vehicles are not titled in Montana. Someone who actually moves here has 60 days from establishing residency to title and register.[3] |
Montana car sales tax calculator
Enter the sale price and any trade-in to estimate Montana vehicle tax and the out-the-door total before title and registration. It applies the verified rate, trade-in rule and doc fee treatment from the quick facts above.
From the desk
Montana has no sales tax, which is why half the country's exotic cars wear Montana LLC plates. For a real dealer desk the story is the reverse: your out-of-state buyer still owes tax at home, and the LLC shortcut is their accountant's problem, not yours.
Selling to an out-of-state buyer in Montana
Montana has no state sales tax on vehicle purchases.[1]
The tax question gets settled at the desk; the follow-through does not. Titles, temp tags, and out-of-state registrations sit in flight for weeks, so somebody has to watch the dates.
Buying in Montana from out of state
Buying a car in a no-sales-tax state does not make it tax-free. Tax follows registration: register the vehicle in another state and that state's use tax is due there, at its rate. No sales tax is owed at registration in Montana.[1]
Registration and temp tags
Montana runs temporary registration permits rather than paper dealer tags. The permit lets the buyer operate the vehicle for 40 days from the date the record is issued, or until the vehicle is registered, whichever comes first, which is the window an out-of-state buyer has to drive home and title in their own state. The permit fee is $24.50 when issued to a non-resident who acquires a vehicle in Montana, and the permit holder must title and register the vehicle in Montana or another jurisdiction before ownership can be transferred again.[2] Montana ties registration to living or working in Montana, so an out-of-state buyer does not plate the car here. Under 61-3-701 through 704, MCA, a non-resident who is gainfully employed in Montana registers with the County Treasurer by presenting the current out-of-state registration and paying taxes or fees in lieu of taxes plus registration fees (may be paid by calendar quarter), and the vehicle then carries both the home-state plate and a Montana decal. Those registration-purposes-only vehicles are not titled in Montana. Someone who actually moves here has 60 days from establishing residency to title and register.[3]
Bordering states
Cross-border deals from Montana most often involve Idaho, North Dakota, South Dakota and Wyoming. Each combination carries its own quirks; run the pair through the out-of-state checker.
Sources
- revenue.mt.gov/taxes/general-sales-tax · verified 2026-08-23
- mca.legmt.gov/…/0610-0030-0020-0240.html · verified 2026-09-17
- mvdmt.gov/vehicle-registration/ · verified 2026-09-17
“Montana Car Sales Tax & Out-of-State Rules.” Voltra. Last verified September 17, 2026. https://voltra.ai/car-sales-tax/montana/
More state-by-state guides: trade-in tax credit by state · recent rule changes · all states + the out-of-state checker