Montana auto insurance laws require every registered vehicle driven on public roads to carry continuous liability coverage of at least $25,000 per person for bodily injury, $50,000 per accident when more than one person is hurt, and $20,000 for property damage. The state uses an at-fault system, so the driver who caused a crash pays for the other side’s losses, and a modified comparative negligence rule can cut or wipe out your recovery if you share the blame. Driving without valid coverage brings escalating fines, loss of registration, and eventually jail.
The Minimum Coverage You Must Carry
Montana Code 61-6-301 requires every registered vehicle operated in the state to carry continuous liability insurance at the minimums set in Code 61-6-103.1Montana State Legislature. Montana Code 61-6-301 – Required Motor Vehicle Insurance – Family Member Exclusion Those minimums are:
- $25,000 for bodily injury or death of one person in a single accident
- $50,000 for bodily injury or death of two or more people in a single accident
- $20,000 for damage to another person’s property in a single accident
You will see these written in shorthand as 25/50/20.2Montana State Legislature. Montana Code 61-6-103 – Motor Vehicle Liability Policy Minimum Limits – Other Requirements Any policy sold in Montana must meet or exceed them.
These numbers are low against the real cost of a serious crash. A single hospitalization can run past $25,000 fast, and you are personally on the hook for anything the policy will not cover. Many drivers carry 100/300/100 or higher for that reason. The minimums keep you legal; they do not necessarily keep you protected.
Proof of Insurance in the Vehicle
Every driver must carry proof of insurance and show it on demand to a peace officer, judge, highway patrol officer, or department inspector. A physical card from your insurer works, and so does an electronic version on your phone or other portable device.3Montana Code Annotated. Montana Code 61-6-302 – Proof of Compliance – Definition If you were stopped without proof but actually had valid insurance at the time, producing that proof to the court or the arresting officer’s office lets you avoid a conviction.
Montana also runs an online verification system that lets the state cross-check insurance status on registered vehicles.4Montana Code Annotated. Montana Code 61-6-157 – Creation of Online Motor Vehicle Liability Insurance Verification System Gaps or delays in insurer reporting can flag your vehicle as uninsured even when it is not, which is one more reason to keep your own proof on hand.
How Fault and Claims Work After a Crash
Montana is a tort state. The driver who caused the crash is responsible for the other party’s injuries and property damage, and there is no mandatory personal injury protection benefit that pays regardless of fault. If someone runs a red light and hits you, you file your claim against that driver’s insurer, not your own. Fault is established through police reports, witness accounts, and physical evidence, and adjusters negotiate from there. When the at-fault driver’s coverage will not cover your losses, you may need to sue or turn to your own underinsured motorist coverage.
The 51 Percent Rule
Montana follows modified comparative negligence under Code 27-1-702. If you are partly at fault, your compensation drops by your share of blame. A jury that finds you 20 percent at fault for a crash with $100,000 in damages reduces your recovery to $80,000.5Montana Code Annotated. Montana Code 27-1-702 – Comparative Negligence – Extent to Which Contributory Negligence Bars Recovery in Action for Damages
The threshold matters. At 50 percent fault you can still collect a reduced amount; at 51 percent you recover nothing at all.6Montana Commissioner of Securities and Insurance. Auto Insurance That cliff shapes settlement talks. An adjuster who can credibly argue you were mostly to blame may refuse to pay anything.
Uninsured and Underinsured Motorist Coverage
Montana insurers must include uninsured motorist (UM) coverage in every auto policy at the state’s minimum liability limits. It pays when the at-fault driver has no insurance at all. The statute defines an uninsured vehicle as one whose ownership or use is not insured or bonded for bodily injury liability at the time of the crash.7Montana State Legislature. Montana Code 33-23-201 – Motor Vehicle Liability Policies to Include Uninsured Motorist Coverage – Rejection by Insured
You can reject UM coverage in writing. Once you do, your insurer does not have to add it back at renewal unless you request it in writing. Declining it trims a little off your premium and leaves you exposed every time you share the road with an uninsured driver.
Penalties for Driving Without Insurance
The penalties climb with each conviction, and any conviction within five years of a prior one counts as a repeat offense.8Montana Code Annotated. Montana Code 61-6-304 – Penalties
- First offense: a fine between $250 and $500, with no jail time.
- Second offense: a flat $350 fine, and the court orders you to surrender your vehicle’s registration and license plates. You can get a restricted registration after 90 days by proving you now carry valid insurance.
- Third or subsequent offense: a $500 fine, up to 10 days in county jail, or both. Registration and plates are again surrendered, and the waiting period for restricted registration jumps to 180 days.
- Fourth or subsequent offense: in addition to the fine and possible jail time, the court orders surrender of your driver’s license if the vehicle was registered to you or an immediate family member.
Registration surrender is mandatory for any second-or-later conviction. To reinstate your registration or license, you must give the Department of Justice proof of financial responsibility. In practice that usually means buying an SR-22 policy, a certificate your insurer files with the state verifying that you carry at least the minimum required coverage. The filing itself runs about $25, but the policy behind it can raise your premiums for years.
How Long You Have to Sue
Montana sets firm deadlines for suing after a crash. Miss the window and you lose the right to go to court, no matter how strong the case.
- Personal injury: three years from the date of the accident.9Montana Code Annotated. Montana Code 27-2-204 – Tort Actions – General and Personal Injury
- Property damage: two years.10Montana Code Annotated. Montana Code 27-2-207 – Injuries Involving Property
- Wrongful death: three years, extended to ten years if the death resulted from a homicide.9Montana Code Annotated. Montana Code 27-2-204 – Tort Actions – General and Personal Injury
These are lawsuit deadlines, not insurance claim deadlines. File your insurance claim much sooner. But the statute of limitations is the hard cutoff for court, and insurance companies know it. An adjuster who can stall you past that date holds all the leverage.
Self-Insurance for Large Fleets
If you own more than 25 registered vehicles, you can apply to the Department of Justice for a certificate of self-insurance instead of carrying a standard policy. The department issues the certificate after confirming you have the financial resources to pay any judgments against you.11Montana State Legislature. Montana Code 61-6-143 – Self-Insurers This path is not available to everyday drivers and matters only to fleet operators.