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Multi-Car Insurance — Montana

A Montana multi-car policy covers every vehicle in your household on one policy at the state's 25/50/20 liability minimum, and combining them earns the multi-car discount. Each vehicle can carry its own level of coverage—liability only or liability plus collision and comprehensive—while the whole policy shares the discount.

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Updated July 2026

Multi-Car Liability Requirements in Montana

Every vehicle on a Montana multi-car policy must carry at least $25,000 bodily injury per person, $50,000 bodily injury per accident, and $20,000 property damage—the state minimum set by Montana Code Annotated 61-6-103. Montana operates under a fault-based system, meaning the at-fault driver's liability coverage pays for the other party's damages. The multi-car discount applies when you put two or more owned vehicles on the same policy, typically requiring the same garaging address.

Montana cityscape and street view
$25,000/$50,000 minimum per vehicle
Bodily Injury Liability
Every vehicle on your Montana multi-car policy must carry at least $25,000 per person and $50,000 per accident in bodily injury liability. This coverage pays for injuries you cause to others in an at-fault accident. Each vehicle on the policy carries its own liability limit—you can raise one vehicle to 100/300 and leave another at the state minimum.
$20,000 minimum per vehicle
Property Damage Liability
Montana requires $20,000 property damage liability on every vehicle. This pays for damage you cause to another person's car or property in an at-fault accident. On a multi-car policy, each vehicle carries its own property damage limit, and you can adjust them independently.
Same policy required
Multi-Car Discount
The multi-car discount applies when you insure two or more owned vehicles on one Montana policy. Among carriers writing here—State Farm, Geico, Progressive, Allstate, Farmers, USAA, Liberty Mutual, Nationwide, and others—most require every vehicle to sit on the same policy and share a garaging address to earn the discount. Adding a vehicle mid-term re-rates the entire policy rather than adding a flat amount.
Optional per vehicle
Collision and Comprehensive
Collision and comprehensive coverage is optional in Montana unless your lender requires it. On a multi-car policy, you can carry full coverage on one vehicle and liability-only on another—the multi-car discount applies to the whole policy regardless of which vehicles carry physical damage coverage. Each vehicle that carries collision or comprehensive has its own deductible.
Not required, but recommended
Uninsured Motorist Coverage
Montana does not require uninsured motorist coverage, but 7.2% of Montana drivers are uninsured as of 2023. On a multi-car policy, uninsured motorist coverage protects every vehicle and every driver listed on the policy when an at-fault driver has no insurance. You can add it to the policy once and it applies across all vehicles.
State-Mandated Minimum Coverage · Montana

Montana Minimum Coverage

CoverageMinimum
Bodily Injury (per person)$25,000
Bodily Injury (per accident)$50,000
Property Damage$20,000

License Reinstatement Fee$100

Meeting the state minimum keeps you legal. See whether it's enough — get your Montana quote.

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What Shapes Multi-Car Costs in Montana

Multi-car policy cost in Montana is shaped by the vehicles you insure, the drivers on the policy, the coverage level selected for each vehicle, and the multi-car discount.

What Affects Your Rate

  • Every vehicle on the policy must carry Montana's 25/50/20 minimum, and raising one vehicle's liability limit does not require raising the others.
  • The multi-car discount typically requires every vehicle to sit on the same policy and share a garaging address; how the cars are titled can affect discount eligibility at some carriers.
  • Montana's 7.2% uninsured motorist rate means adding uninsured motorist coverage to a multi-car policy protects every vehicle and driver for one additional premium.
  • Among carriers writing in Montana, State Farm, Geico, Progressive, Allstate, Farmers, USAA, Liberty Mutual, and Nationwide all offer multi-car discounts, but the structure and percentage vary by carrier.
  • Montana's 1.52 traffic fatalities per 100 million vehicle miles traveled and 34% alcohol-impaired fatality rate shape how carriers price liability coverage for multi-car households.
  • Adding a vehicle mid-term re-rates the entire policy rather than adding a flat monthly amount, and the multi-car discount recalculates across all vehicles.
Two Vehicles, One Policy
25/50/20 min
Two vehicles on one Montana policy at the state minimum earn the multi-car discount. Cost rises when you add physical damage coverage to either vehicle, and the discount percentage varies by carrier.
Adding a Vehicle Mid-Term
Policy re-rates
When you add a third or fourth vehicle to an existing Montana multi-car policy, the carrier re-rates the whole policy with the new vehicle included. The multi-car discount applies to all vehicles, but the total cost reflects the additional exposure.
Combining Two Households
Same address
When two households combine—marriage or a household member moving in—putting all vehicles on one Montana policy earns the multi-car discount, but most carriers require the same garaging address and all drivers listed on the policy.

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Coverage Types

Multi-Car Insurance

A multi-car policy puts two or more owned vehicles on one Montana policy, and each vehicle can carry its own coverage level while the whole policy earns the multi-car discount.

Liability Insurance

Liability insurance covers injuries and property damage you cause to others in an at-fault accident. Montana requires 25/50/20 on every vehicle.

Full Coverage Insurance

Full coverage combines liability, collision, and comprehensive. On a multi-car policy, you can carry full coverage on one vehicle and liability-only on another.

Uninsured Motorist Coverage

Uninsured motorist coverage protects you when an at-fault driver has no insurance. Montana does not require it, but 7.2% of Montana drivers are uninsured.

Find Your City in Montana

Billings, Montana cityscape and street view

Billings

suburbanCost reflects urban density and theft exposure; carriers writing in Billings include State Farm, Geico, Progressive, Allstate, and others.

Billings' higher traffic density and vehicle theft rate of 165.5 per 100,000 statewide shape multi-car policy cost for households in Yellowstone County.

Missoula, Montana cityscape and street view

Missoula

suburbanWinter weather and terrain shape physical damage coverage cost; multi-car discount applies regardless of which vehicles carry full coverage.

Missoula's winter weather and mountain driving conditions affect collision and comprehensive pricing for multi-car households in Missoula County.

Great Falls, Montana cityscape and street view

Great Falls

suburbanRural commute patterns and lower traffic density shape liability and collision pricing; multi-car discount applies across all vehicles on the policy.

Great Falls' lower population density and rural commute patterns reduce collision exposure for multi-car households in Cascade County.

Dramatic mountain landscape with layered rock peaks, green valley, and evergreen trees under cloudy sky

Bozeman

urbanHigher vehicle values and population growth shape comprehensive and collision pricing; multi-car discount applies when all vehicles share the same policy.

Bozeman's growing population and higher vehicle values affect multi-car policy cost for households in Gallatin County.

Aerial view of snow-covered residential neighborhood with houses and buildings in winter cityscape

Butte

urban

Frequently Asked Questions

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