Montana Car Sales Tax Calculator (2026)
Estimate Montana car sales tax in seconds. Enter your sale price and we apply the flat statewide rate; the calculator returns state tax, local surtax, title transfer fee, and total out-the-door cost for a private party sale.
Montana Car Sales Tax Calculator
Estimate state tax, local surtax, and total cost for a private car sale in Montana.
Estimated total tax
$0.00
Exempt from state sales tax for private party sales
Montana exempts private party car sales from state sales tax. Montana has no state sales tax on any purchases
No sales tax; registration fees based on vehicle age and value
Estimate only. MT DMV may calculate tax from the higher of purchase price or book value. Confirm exact rates with your county tax assessor before transfer.
How Montana taxes private car sales
Montana is one of the rare states that exempts private party car transactions from state sales tax. Montana has no state sales tax on any purchases. No sales tax; registration fees based on vehicle age and value. Even with no state tax, buyers still pay the $12 title transfer fee at the DMV.
Who pays the tax
In Montana the buyer pays the car sales tax at the time of title transfer — it is collected by the DMV (or equivalent agency) when the buyer registers the vehicle. The seller does not collect tax in a private party sale.
When the tax is due
Tax is due within 40 days of the sale date. Montana late-titling penalties typically begin once that window closes — interest accrues monthly on unpaid tax.
Exemptions and gift transfers
Montana exempts private party car sales from state sales tax. Montana has no state sales tax on any purchases.
Late penalties
Filing the title transfer beyond the 40-day window typically triggers a late fee plus monthly interest on the unpaid tax. The Montana DMV may also block registration renewals until the back tax is paid. File on time — the calculator above shows the exact amount owed.
Notary requirement
Montana requires the bill of sale to be notarized before the DMV will process the title transfer. Have both parties sign in front of a notary public.
Compare car sales tax across states
See how Montana stacks up against the five lowest- and highest-tax states for a private car purchase. Tap any state to open its calculator.
5 lowest sales-tax states
- Alaska0%
- Arizona0%
- Delaware0%
- New Hampshire0%
- Oregon0%
5 highest sales-tax states
- Arkansas11.63%
- Louisiana11.45%
- California10.50%
- Kansas10.50%
- Washington10.40%
Montana car sales tax FAQ
How much is sales tax on a car in Montana?
Montana private party car sales are exempt from state sales tax. Montana has no state sales tax on any purchases. Use the calculator above to confirm your total.
Who pays sales tax on a private car sale in Montana?
In Montana the buyer pays the car sales tax at the time of title transfer — it is collected by the DMV (or equivalent agency) when the buyer registers the vehicle. The seller does not collect tax in a private party sale.
When is Montana car sales tax due?
Tax is due within 40 days of the sale date. Montana late-titling penalties typically begin once that window closes — interest accrues monthly on unpaid tax.
Are there any Montana sales-tax exemptions for car transfers?
Montana exempts private party car sales from state sales tax. Montana has no state sales tax on any purchases.
What is the title transfer fee in Montana?
The Montana title transfer fee is $12. This is collected at the time of title transfer in addition to any sales tax owed. Use the calculator above to see fees plus tax on your sale price.
Ready to close the car sale?
Create a printable Montana car bill of sale in minutes. It is required at the DMV to register your purchase and document the taxable amount.
Create your Montana bill of saleRelated resources
Informational purposes only. This content is provided for informational purposes only and is not legal advice. Laws vary by state and individual circumstances differ. Consult a licensed attorney for jurisdiction-specific guidance on vehicle transfers, title requirements, or related legal matters.