Montana Car Sales Tax Calculator
Montana's vehicle sales/use tax depends on where you register and other factors, so it isn't a single statewide figure. Use the calculator and the official Montana Motor Vehicle Division source below to confirm what applies to your purchase.
Estimate your Montana car sales tax
Enter the vehicle price. If Montana gives a trade-in tax credit, add your trade-in value to reduce the taxable amount.
State rate only. Many Montana counties and cities add a local sales tax on top, so your actual total may be higher. Trade-in credit rules vary — confirm eligibility with the official source below.
How Montana taxes a car purchase
| State vehicle sales/use tax rate | Check official source |
| Taxable amount | Price − trade-in credit (where allowed) |
| Local / county tax | Varies by jurisdiction — added on top of the state rate |
Fee schedule varies — see official source.
What this estimate excludes
- Local and district taxes. County, city, and transit taxes are added on top of the Montana state rate.
- Title, registration, and plate fees. These are separate from sales tax — use the Montana registration and title-transfer calculators for those.
- Dealer documentation fees. A dealer “doc fee” is charged on top and is often itself taxable.
- Exemptions. Gifts, inheritance, and certain family transfers may be exempt — confirm with Montana Motor Vehicle Division.
Official Montana source
↗Montana Motor Vehicle Divisiondoj.mt.govRelated Montana tools & guides
Frequently asked questions
How much is sales tax on a car in Montana?
Montana does not reduce to one statewide vehicle tax rate — it varies by locality and purchase type. Check the official Montana Motor Vehicle Division source for the rate that applies to you.
Do I pay sales tax when buying a used car from a private seller in Montana?
In most states, sales or use tax on a private-party vehicle purchase is collected when you title and register the car, not at the point of sale. The rate is generally the same as a dealer sale. Confirm the private-sale rules with Montana Motor Vehicle Division.
Does Montana give a sales tax credit for a trade-in?
Most states tax only the difference between the vehicle price and your trade-in value, which lowers the tax you owe. A handful of states tax the full price with no trade-in credit. Verify Montana's treatment before you rely on the estimate above.
Are there local or county car sales taxes in Montana?
Often, yes. The rate shown here is the Montana state rate only; many counties, cities, and transit districts add a local sales tax on vehicle purchases, so your combined rate can be higher. Montana Motor Vehicle Division publishes the official combined rates.
Last reviewed: 2026-01-01 · Reviewed by the Car Paperwork editorial team · Based on official Montana Motor Vehicle Division sources · Independent resource · Not legal advice