Montana Requires Bodily Injury Liability on Every Vehicle
Montana law mandates bodily injury liability coverage on every registered vehicle you own. The state minimum is $25,000 per person and $50,000 per accident. If you insure two or more vehicles on one policy, each vehicle must meet this floor — the limits do not pool across cars.
Households adding a second or third car sometimes assume the existing policy's liability limit covers all vehicles automatically. It does not. Each vehicle on your policy must carry at least the state minimum, and dropping one car below that threshold leaves you uninsured under Montana law even if your other vehicles carry higher limits.
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Get Your Free QuoteMontana Bodily Injury Minimum
$25,000 / $50,000
Montana requires $25,000 per person injured and $50,000 per accident. These limits apply to each vehicle on your policy, not to the policy as a whole.
Montana Code Annotated 61-6-103
How Per-Person and Per-Accident Limits Work Across Multiple Vehicles
The $25,000 per person limit is the maximum your insurer pays for one person's injuries in a single accident. The $50,000 per accident limit is the maximum paid for all injuries combined in that accident, regardless of how many people are hurt. These limits attach to the vehicle involved in the accident, not to your entire policy.
When you insure three cars on one policy, each car carries its own bodily injury liability limit. If your second car causes an accident, only that car's limit applies — the limits on your first and third cars do not stack or transfer. A common misconception is that a higher limit on one vehicle raises the floor for the others. It does not.
Carriers do not automatically equalize limits across vehicles when you add a car mid-term. You must specify the limit for each vehicle separately.
Adding a vehicle mid-term does not inherit the liability limits from your existing cars. You must select the limit for the new vehicle explicitly, or it defaults to the state minimum.
What Happens When One Vehicle Drops Below the Minimum
Montana's Motor Vehicle Division monitors insurance coverage electronically. When a vehicle's liability coverage lapses or falls below the minimum, the carrier notifies the MVD within days. This applies even if your other vehicles remain insured at higher limits.
Households managing multiple vehicles sometimes drop collision or comprehensive on an older car to save money, intending to keep liability only. If the carrier processes the change incorrectly and removes all coverage, or if you accidentally select a lower liability limit during the change, the MVD treats it as a lapse. The suspension applies to the specific vehicle, but if you are the named insured on all vehicles, your license suspension affects your ability to drive any of them.
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Structuring Liability Limits Across a Multi-Car Policy
Most carriers allow you to set different liability limits for each vehicle on a multi-car policy. This flexibility lets you carry higher limits on a newer car driven daily and the state minimum on an older car driven occasionally. The carrier re-rates the policy each time you add or remove a vehicle, recalculating the premium based on each car's limit, driver assignment, and use profile.
When you add a third or fourth vehicle, the carrier typically asks whether the new car should match the limits on your existing vehicles or carry a different limit. If you do not specify, many carriers default the new vehicle to the state minimum. Review the declaration page after adding a vehicle to confirm each car's limit matches your intent.
Raising one vehicle's limit does not raise the others automatically. Carriers do not synchronize limits across vehicles without explicit instruction.
Montana Uninsured Motorist Rate
7.2%
Approximately 7.2% of Montana drivers carry no insurance. Bodily injury liability protects you when you cause an accident, but uninsured motorist coverage protects you when an uninsured driver hits you.
Insurance Research Council, 2023
Comparing Carriers That Write Multi-Car Policies in Montana
Sixteen carriers write multi-car policies in Montana. Allstate, Farmers, Geico, Liberty Mutual, Nationwide, Progressive, State Farm, and USAA operate statewide and allow you to set different liability limits for each vehicle. Bristol West and The General specialize in non-standard policies and typically require the same limit across all vehicles on the policy.
When comparing carriers, confirm that each vehicle on your quote carries at least the $25,000/$50,000 minimum. Some online quote tools pre-populate the state minimum for all vehicles, while others carry forward the limit from your current policy. If you are moving from a single-car policy to a multi-car policy, the new carrier may not automatically apply your existing limit to the second vehicle.
Compare Carriers and Confirm Each Vehicle's Limit
Montana requires $25,000 per person and $50,000 per accident bodily injury liability on every vehicle you insure. These limits apply to each car separately, not to your policy as a whole. Adding a vehicle mid-term does not inherit the limits from your existing cars — you must specify the limit for the new vehicle explicitly, or it defaults to the state minimum. Compare carriers that write multi-car policies in Montana and confirm each vehicle's liability limit on your declaration page before binding coverage.