Montana is one of only five U.S. states with no general sales tax, and it also has no separate motor-vehicle sales tax. That means the sales tax on a car you buy and register in Montana is genuinely $0 — there is no rate to look up. This tool makes that explicit and adds the real costs you do pay: the title fee and, for very expensive cars, a luxury surcharge.
How it works
There is no rate calculation because the rate is zero:
sales tax = price × 0% = $0
title fee = $12.13 (one-time)
luxury surcharge= $825/year if MSRP > $150,000 (first 11 years)
all-in cost = price + dealer fees + title + luxury
The absence of sales tax is why Montana LLC registration is a known strategy for high-value vehicles — though your home state may impose use tax if the car is actually used there.
Example and notes
A $30,000 car incurs $0 Montana sales tax. You pay the ~$12 title fee and an age-based registration fee (see the registration calculator), so your tax-and-fee outlay at the DMV is a fraction of what a sales-tax state would charge. A $200,000 vehicle would add the $825 annual luxury surcharge. If you live outside Montana, check whether your home state will assess use tax before relying on Montana registration.