The sticker isn’t the price. Enter your numbers, see the itemized buyer’s order the finance office prints — tax, title, and fees included — and give it a proper side-eye before you ever sit down.
State base rate applied: 0% · trade-in reduces taxable amount
Estimates only. Tax rates, trade-in credit rules, and fee caps are approximations and change by locality and year — verify with your state DMV and dealer paperwork. Prototype data: confirm all rates before publishing.
Montana applies a base vehicle sales tax rate of 0% with no typical local add-on. Good news on the trade: Montana taxes only the difference between the vehicle price and your trade-in value, so a strong trade allowance cuts your tax bill directly. Dealer doc fees are not capped, so treat the doc fee as part of the negotiation.
Rates and rules shown are estimates pending verification against official Montana sources — always confirm with the DMV and your final paperwork.