Car Insurance in Montana

What is different about car insurance in Montana?

Montana sets a modest legal floor, and it leaves more of the protection decisions to you. The law sets liability cover at 25/50/20. Liability is the part of a policy that pays other people when you cause a crash. The numbers mean $25,000 for each injured person, $50,000 for everyone hurt in one crash, and $20,000 for damaged property.

One choice sits on top of that floor. Uninsured motorist cover, which pays you when the other driver has no insurance, must be offered but is not required. It is not built into the minimum.

Montana is also an at-fault state. If you cause a crash, your insurer pays the other side, up to your limits. Nobody has to buy personal injury protection. Montana’s regulator also reminds drivers that buying a policy after a loss is insurance fraud, so you cannot fix a gap once the crash has happened.

This page sums up the rules and tells you where to go next. For a plain-language look at what the minimum pays in a real crash, see our guide to minimum requirements across states.

Do I have to buy uninsured motorist coverage in Montana?

No, but it is easy to lose by accident. Every policy has to come with the cover at 25/50 unless the named insured rejects it. The state regulator says your agent must provide it unless you sign a form declining it.

The renewal rule is the quiet trap. If you turned it down on an earlier policy, the same insurer does not have to add it to a renewal unless you ask in writing. A driver who signed a form years ago may have no cover today and not know it.

Here is an invented example. A driver with no insurance hits you, and your medical bills come to $30,000. With the cover, your own insurer pays up to your limit. Without it, you rely on your health plan and a lawsuit against someone who probably cannot pay.

The risk looks lower in Montana than in most of the country. The Insurance Research Council estimated that 7.2% of Montana drivers were uninsured in 2023, against 15.4% nationally. Our uninsured motorist guide explains how to pick limits.

Who pays when both drivers share the blame?

Montana lets you recover as long as your share of fault is not greater than the other side’s. Your payout is cut by your share. If you were 20% at fault and your damages were $10,000, the most you can collect is $8,000.

One wrinkle: the regulator’s page describes the cutoff as “less than 50%” at fault, while the statute is worded as “not greater than.” The statute is the stronger source, but a dead heat at 50% is a gray area. Do not rely on it. In practice, the other driver’s insurer makes the first offer, and the courts decide if you cannot agree.

The regulator cannot settle that argument for you. It can ask an insurer to review a decision, but fault is a civil matter. You also have three years to file a lawsuit over an injury. Our guide to at-fault and no-fault states compares the systems.

What happens if I drive without insurance in Montana?

A first conviction costs $250 to $500. That applies to driving without cover and to not carrying or showing proof. The penalties climb with each repeat inside five years.

The state checks cover in an online system that insurers feed. An officer who confirms valid insurance there at the time of the stop cannot see you convicted of the proof charge. If the system is down, you can bring proof of a policy valid on that date to court or to the officer’s office. Keep your card or a phone image anyway, because the officer can ask for it, and the owner can be charged instead of a borrowing driver.

Motorcycles and a few other vehicles are exempt from the insurance rule. Cars, pickups and SUVs are not.

What can my insurer do to my policy?

Montana limits how quickly an insurer can leave you. According to the state regulator, a company must give 10 days’ notice to cancel for unpaid premium. For any other reason, it must give 45 days to cancel or not renew. The notice goes to the last address the insurer has, so a move you never reported can cost you the warning.

Credit history is allowed in pricing, within limits. An insurer cannot use credit alone to deny, cancel or non-renew you, and a thin or missing credit file must be handled under set rules, such as treating it as neutral. It also cannot count rate-shopping inquiries against you. On written request, it must consider exceptions for events such as a catastrophic illness or a temporary job loss.

If no insurer will write your liability cover at all, Montana has an assigned-risk plan. Every insurer that sells auto liability must take part. Treat it as a last resort and shop the open market first. Other things that raise a household’s price:

• A licensed teenager in your home, even one who does not drive your car. The regulator says the company may rate that teen anyway.
• Another driver with a poor record. Some insurers decline the whole household, or exclude the driver by name.
• Tickets and crashes from the past three years of your record.

How much does car insurance cost in Montana?

The most neutral number is the NAIC’s 2024 state average of $1,080.94 per insured vehicle for a year. That is a state figure that blends every driver, car and coverage level, so it is not a quote for you. It sits about 25% below the national $1,431.63. It also climbed almost 11% from $975.05 in 2023, so today’s prices are probably higher still.

For clean-record drivers, three published 2025-26 estimates show how much the choice of coverage matters. The profiles differ a little, so treat the table as a range.

Full coverage in these samples means 100/300 liability plus collision and comprehensive, with deductibles of $500 or $1,000. The insurer you pick matters as much as the coverage. Insurance.com’s 100/300 prices run from $1,914 at State Farm to $3,322 at Allstate, leaving out military-only USAA. NerdWallet shows its cheapest full-coverage quote at $1,544, against its $2,879 average.

Insure.com also publishes full-coverage averages of $2,131 in Missoula and $2,185 in Helena, both below its state figure. We have no Montana city pages, so check quotes for your own address.

Which Montana guide should I read next?

We have not yet published Montana-specific pages on minimum limits, SR-22, DUI or young drivers. We link to the general guides below rather than send you to pages that do not exist.

You can also check any state’s limits with the state minimum lookup.

If your license is revoked, for example after a hit-and-run with injuries or fleeing police, Montana asks for a “certificate of insurance” from an insurer approved in the state before you get it back. Most people call that an SR-22.

We could not confirm the state’s own label or its fee, because the licensing agency’s site blocked our reading. The state can waive the filing after three years if you had no convictions in that time that could cost you your license. A first DUI conviction is handled differently: it brings a six-month suspension, not a revocation. Ask the Motor Vehicle Division what applies to you.

Who do I call with a problem?

The Montana Commissioner of Securities and Insurance oversees insurers. The office takes questions and complaints at 800-332-6148 or 406-444-2040. It also lists approved defensive driving courses that can earn a 55+ discount. For license or registration problems, use the Motor Vehicle Division at the Department of Justice and the contact details on your notice.

The state’s 2025 session touched the owner-duty and proof wording but left the 25/50/20 limits alone. The legislature meets in odd-numbered years, so the next regular session starts in January 2027. This page is general information, not legal advice.

What to do next

1. Find your declarations page. Confirm liability at 25/50/20 or higher, and check whether uninsured motorist cover is listed.
2. Ask about the signed form. If you rejected uninsured cover years ago, request it in writing and ask the price.
3. Price higher limits. A $50,000 injury bill is easy to reach, so ask for quotes at 100/300 as well as the minimum. Add the same collision deductible each time.
4. Check your animal cover. The regulator says comprehensive pays for animal collisions. Know your deductible before a deer crossing, not after.
5. Keep proof handy. Store the card or a phone image where you can show it.
6. Re-shop each renewal. Compare at least three quotes using identical limits and deductibles.

Bottom line

If you want to be legal, 25/50/20 is enough. If you own a home, have savings, or drive long rural miles, ask for higher limits and make sure uninsured motorist cover is on. If you have a notice, a lapse or a dispute, start with the regulator and your insurer’s written decision.