Montana Used Car Sales Tax: None, but Registration, County Tax and LLCs

Montana has no general sales tax, so you pay no sales tax when you buy a used car there, from a dealer or a private seller. What you do pay is registration: a flat state fee based on the car's age ($217, $87 or $28 a year), plus a county option tax of up to 0.7% of a depreciated MSRP value, plus smaller fees. Cars 11 or more years old can be registered permanently for a one-time payment. If you live in another state, buying or plating a car through a Montana LLC can leave you owing your home state's tax later, and several states now chase it.

I read the Montana Department of Revenue's sales tax page, the Motor Vehicle Division's light vehicle fee page and the relevant sections of the Montana Code Annotated on Oct 20, 2026. Numbers below are as of that date. Example math is mine, not the state's.

No sales tax, confirmed

The Department of Revenue states it plainly: Montana "does not have a general sales tax." It says this in the context of online shopping, but the same holds for a used car. Nothing gets added at the dealer's desk for state sales tax, and a private sale doesn't trigger any either. The money comes in at the county treasurer when you register. For the paperwork side of a private sale, our Montana title transfer guide covers the steps.

What registration costs

Under MCA 61-3-321(2)(a), the annual registration fee for light vehicles, meaning cars, pickups one ton and under, vans and SUVs, depends on age:

• 4 years old or less: $217
• 5 through 10 years old: $87
• 11 or more years old: $28

For a light vehicle with an MSRP over $150,000 that is 10 years old or less, the statute adds $825 a year. The MVD says age is figured by subtracting the model year from the calendar year the fee is due, and it notes a 3% administrative fee on top of the rate. You can choose 12-month or 24-month registration.

The second piece is the county option tax. MCA 61-3-537 lets a county impose a tax of up to 0.7% of the vehicle's value as set under 61-3-503, or a local flat fee instead, but only with voter approval. That value starts from MSRP and drops on a schedule the MVD publishes. For an automobile it's 90% at age zero, 41% at five years, 21% at eight, 14% at ten and bottoms out at 9% from age 13 on. Trucks, vans and SUVs depreciate more slowly on the same table.

A rough example, using my numbers: an 8-year-old car that stickered at $30,000 gets a taxable value of $6,300 (21%). In a county charging the full 0.7%, that's about $44 a year in county option tax, plus the $87 state fee and the smaller add-ons. Your county may charge less or use a flat fee, so call the treasurer.

Permanent registration for older cars

This is the Montana rule most people outside the state haven't heard of. MCA 61-3-562 lets the owner of a light vehicle 11 or more years old register it permanently by paying an $87.50 registration fee, the other applicable fees, and five times the county option tax or flat fee. After that it never renews as long as you own it. A few plate types, including national guard, reserve armed forces and amateur radio plates, can't be used for it.

The detail that matters for used-car buyers: permanent registration doesn't transfer. When the car is sold, the state cancels it, and the new owner has to title and register the car again. So a seller saying "it's permanently registered, you never pay again" is wrong for you. Price in a fresh registration.

The Montana LLC question

Montana's lack of sales tax and low fees have made it a popular place for out-of-state buyers of expensive cars, RVs and boats to register through Montana LLCs. NBC Montana reported in August 2025 that California's DMV was investigating out-of-state plates, mostly Montana, and that Utah passed Senate Bill 52 to compare state databases and find violators. A Montana Department of Justice spokesperson told the station it "is not a tax loophole, it's Montana law."

Bloomberg Tax reported in July 2025 that California's tax agency had flagged over 1,500 vehicles from 500 dealers, valued at more than $300 million, as possibly improperly registered in Montana, and that Illinois had passed a law letting it look through LLC structures to the real owner. The legal question is your home state's, not Montana's. If you live and drive somewhere else, assume your state can bill you for the tax it says you owed, plus penalties. I can't say a given setup is illegal everywhere. It is under active enforcement in several states, so talk to a tax professional where you live before you sign anything.

Before you pay anyone

Skipping sales tax doesn't skip the risk of buying someone else's problem. Run the VIN through NMVTIS for brands and read our Montana salvage and rebuilt title rules if anything shows up. If you're coming from a state that does charge tax, our used car sales tax overview covers how other states handle it.

On report prices: CarVins is a licensed CARFAX and AutoCheck reseller and isn't affiliated with CARFAX, AutoCheck or Experian. In late October 2026 our prices were roughly $5.50 per guest report, $4.50 for members and $6.75 for a bundle of two, against about $39.99 to $44.99 buying direct. What shows at checkout is final, so confirm it there.

Sources

• Montana Department of Revenue: Sales tax guidance
• Montana MVD: Light vehicle registration and fees
• MCA 61-3-321, 61-3-537 and 61-3-562
• NBC Montana: Out-of-state vehicle owners use Montana LLCs (Aug. 2025)
• Bloomberg Tax: California finds 1,500 vehicles linked to Montana tax shelters (July 2025)