Montana has roughly 52,000 registered motorcycles. The average motorcycle insurance premium is $370/yr for a standard liability-plus-comp/collision policy. Helmet law: Riders under 18 only. Insurance is required by state law.
Registered Bikes
52,000
DMV-registered motorcycles
Avg Annual Premium
$370/yr
Standard liability + comp/coll
Helmet Law
Riders under 18 only
Riders subject to state law
| Topic | Detail | Notes |
|---|---|---|
| Insurance required by law | Yes — minimum liability required | Same as auto in most states |
| Top motorcycle insurers in state | Progressive, State Farm, GEICO | Get quotes from multiple carriers — premiums vary 40%+ |
| Helmet law detail | Riders under 18 only | Affects injury claim severity and rates |
| Notable state rule | Montana has no daytime speed limit on rural two-lane highways (though 80 mph applies on some interstates), creating unique risk considerations for motorcycle riders. | State-specific requirement to verify |
Premium estimates reflect a standard rider profile: age 35, clean record, mid-size cruiser, $500 deductible. Sport bikes, high-CC models, and riders under 25 typically pay 30–80% more.
Montana is a premier destination for adventure motorcycle touring — the Going-to-the-Sun Road in Glacier National Park, the Beartooth Highway, and US-2 along the Hi-Line are among the most spectacular motorcycle routes in the country. Adventure bikes and touring motorcycles dominate the market given the state's mix of pavement, gravel, and high-elevation passes. Montana requires helmets only for riders under 18, and its low population density, minimal traffic, and generally favorable claims history contribute to average premiums of just $370 per year.
Montana's state minimums are 25/50/20. The state has historically had no posted speed limit on some rural highways, though 80 mph now applies on most rural interstates. This speed environment increases the severity of accidents when they do occur, making medical payments (MedPay) and higher liability limits a prudent choice. The riding season runs from May through September in higher elevations, with valley riding possible from April through October. Progressive and State Farm are the primary carriers. Remote access means emergency response times can be lengthy — medical evacuation insurance through MedPay or a travel health rider is worth serious consideration for backcountry adventure riders.
Montana motorcycle policies typically include the same coverage types as auto: liability (bodily injury + property damage), uninsured/underinsured motorist, medical payments, and optional comprehensive/collision. Many states allow higher minimum limits than auto due to higher injury severity.
Standard motorcycle policies cap aftermarket parts coverage at $1,000–$3,000. If you've added exhaust, fairings, custom paint, or upgraded suspension, add a CP&A endorsement — costs $20–$80/year for $5K–$30K of additional coverage.
In Montana's ride season, full coverage stays active year-round by default — but you're paying for collision/comp even when the bike is in storage. Many insurers offer 'lay-up' coverage that drops liability/collision during off-season months while keeping comprehensive (theft/fire) active. Saves 30–60% on annual premium in cold-weather states.
💡 Montana Pro Tip
Yes. Montana requires minimum liability coverage of 25/50/20 for all motorcycles operated on public roads. Proof of insurance is required during traffic stops.
Montana is one of the most affordable states for motorcycle insurance, averaging approximately $370 per year. Even Billings and Missoula metro riders rarely pay more than $480 for comparable coverage.
Montana requires helmets for riders and passengers under 18 years old. Adult riders are not legally required to wear a helmet, though helmets are strongly advised given Montana's remote roads and lengthy emergency response times.
Registration counts from state DMV public data; premium averages from 2026 motorcycle insurer rate filings for Montana. Helmet law per state statute.
Michael Torres
Editorial Lead, Property & Casualty
This article was researched and written by the Cover Forge USA editorial team against federal sources (NAIC, CMS, FEMA, DOL, SSA, state DOIs) and standard policy forms. Bylines organize content by topic — they do not assert individual licensure. See our editorial-policy for details.
Reviewed May 2026
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This site provides general educational information only and is not a substitute for professional insurance advice. All rates, data, and coverage details are estimates and may not reflect your actual premiums. Insurance availability and pricing vary by state, insurer, and individual risk factors. Always consult a licensed insurance professional in your state before making coverage decisions.