Montana Commercial Auto Insurance Requirements

Montana requires commercial auto insurance with 25/50/20 liability limits for most business vehicles. Coverage minimums change based on vehicle weight, tow truck classification, cargo type and whether your business transports passengers for hire.

Learn more about the commercial auto insurance coverage you need for your business in Montana, special circumstances, exemptions and penalties below.

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# Montana Commercial Auto Insurance Requirements

Written by Blest Papio

Updated: March 12, 2026

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What Commercial Auto Insurance Is Required in Montana?

Under MCA § 61-6-103, every business vehicle on Montana's public roads must carry commercial auto insurance requirements at these minimum liability limits:

$25,000 for bodily injury or death of one person per accident
$50,000 for bodily injury or death of two or more people per accident
$20,000 for property damage per accident

These limits cover most standard Montana commercial vehicles, from company sedans to light-duty service trucks. They don't apply to businesses running heavier vehicles over 10,001 pounds, tow truck operators, passenger-for-hire services or hazmat carriers, all of which face higher coverage floors tied to their specific operations.

Montana's weight-based tiers apply to intrastate vehicles hauling non-hazmat cargo that stay within state lines. Vehicles involved in interstate commerce fall under federal FMCSA rules regardless of weight.


Under 10,001 lbs	25/50/20 liability limits	Light-duty commercial vehicles
10,001–26,000 lbs	$300,000 CSL (Combined Single Limit)	Medium-duty trucks, box trucks
26,001+ lbs	$750,000 CSL (Combined Single Limit)	Heavy-duty trucks, semi-trucks

All Montana weight bands reference your GVWR (Gross Vehicle Weight Rating), which is the maximum allowed operating weight of the vehicle including the vehicle itself, fuel, driver, passengers and cargo. The GVWR for most commercial pickups falls between 6,000 and 10,000 pounds, while box trucks and larger vehicles often exceed the 10,001-pound threshold that triggers $300,000 CSL requirements. You can locate your GVWR in these places, ordered from least to most reliable:

On your vehicle: Most often found on the driver-side door jamb, door edge or pillar and sometimes inside the engine bay. It may also be listed as GAWR (axle ratings).
Owner's manual: Section names vary but often appear under specifications, vehicle identification, weight information, towing/trailering and technical data.
Manufacturer website: Search by your vehicle model for specs on the automaker's website.

Passenger-for-hire vehicles in Montana carry separate coverage requirements based on seating capacity, not the weight-based tiers that apply to cargo haulers. The steepest increase hits at 16 passengers, where CSL coverage jumps from $750,000 to $5 million. These tiers don't apply to vehicles transporting employees or company staff, only to operations charging fares or fees.


1–8 passengers	$250,000 CSL	Taxi, livery, NEMT
9–15 passengers	$750,000 CSL	Shuttles, small buses
16+ passengers	$5,000,000 CSL	Charter buses, tour buses

MCA § 69-12-343 sets specific insurance rules for transportation network companies (TNCs) like Uber and Lyft operating in Montana. The law applies the moment a driver logs on to the TNC platform, whether or not a passenger has requested a ride. Traditional taxi companies, livery services and NEMT providers don't fall under TNC rules and instead follow the passenger count tiers above.


App on, waiting for request	TNC, driver or combination	50/100/25 liability limits plus UM/UIM
Ride accepted through trip completion	TNC, driver or combination	$1,000,000 CSL for death, bodily injury and property damage plus UM/UIM

Most personal auto policies in Montana contain livery exclusions that void coverage during any TNC activity. MCA § 69-12-343(4) addresses this gap directly: if the driver's personal insurance lapses or falls short of the required limits, the TNC's policy must step in as primary coverage.

All hazmat cargo coverage in Montana follows federal FMCSA classifications under 49 CFR Part 171, whether your trucks stay local or cross state lines. For non-hazmat freight, Montana relies on weight-based thresholds rather than cargo-specific rules, so those vehicles default to the tiers in the vehicle weight section above.


Standard hazmat	$1,000,000 CSL	Regulated materials per federal DOT rules
Oil transport	$1,000,000 CSL	Crude oil, fuel oil, lubricants (any federal quantity)
High-risk hazmat	$5,000,000 CSL	Tanks over 3,500 gallons, Class A or B explosives, poison gas, liquefied compressed gas and other substances defined in 49 CFR Part 171
Non-hazmat freight	Weight-based (see vehicle weight section)	General goods, household items, refrigerated loads

The $5 million high-risk hazmat floor applies to every vehicle carrying those materials, including those under 10,001 pounds GVWR. Vehicle size offers no exemption in this category.

Tow truck operators in Montana must carry liability coverage matched to their vehicle's class under MCA § 61-8-906, from light-duty flatbeds handling sedans to heavy-duty wreckers recovering semis on I-90. Beyond liability, every tow operator also needs garagekeepers or on-hook legal liability insurance and cargo coverage. Roadside assistance vehicles that don't tow or transport other vehicles aren't subject to these tow-specific requirements.


A (light-duty)	$300,000 CSL	Garagekeepers or on-hook liability ($50,000 min), cargo insurance ($20,000 min)
B (medium-duty)	$500,000 CSL	Garagekeepers or on-hook liability ($50,000 min), cargo insurance ($20,000 min)
C (heavy-duty)	$750,000 CSL	Garagekeepers or on-hook liability ($50,000 min), cargo insurance ($20,000 min)

Operators file a Certificate of Insurance (Form MV-5) with the Montana Highway Patrol and must provide proof of coverage to the public on request. Any lapse can result in loss of towing authority, so continuous coverage is mandatory.

WHEN DOES FEDERAL LAW APPLY OVER MONTANA LAW?

Federal rules take over when your business transports cargo or passengers across state lines, or when you carry freight that's part of a larger interstate shipment, even if your trucks never leave Montana. Any vehicle with a GVWR of 10,001 pounds or more operating in interstate commerce must carry at least $750,000 CSL for general freight under FMCSA standards. Purely intrastate operations aren't subject to federal minimums, but confirm your status with the Montana Department of Transportation, current FMCSA insurance filing requirements and a licensed insurance professional.

Montana Commercial Auto Insurance Requirement Exemptions

Montana's broadest exemption applies to agricultural operations. Under MCA § 61-1-101, farm trucks controlled by the farmer, a family member or a farm employee can operate within 150 miles of the farm without meeting commercial vehicle insurance thresholds. Beyond farming, several other categories of vehicles fall outside the standard commercial requirements. You can check your vehicle's status through the Montana Motor Vehicle Division.


Vehicle used only for personal (non-business) purposes	Personal auto insurance rules
Farm vehicle not operated on public roads	May not require liability coverage under road-use laws
Farm truck within 150 miles of farm (farmer/family/employee operated)	Standard personal auto minimums, not commercial requirements
Off-road equipment (construction equipment, ATVs) not driven on highways	Not subject to on-road insurance mandates
Government vehicles covered under authorized self-insurance programs	Government self-insurance statutes
Vehicle not registered for road use (yard-only, private property use)	No road-use liability requirement

None of these exemptions protect vehicles operating on public roads in Billings, Missoula, Great Falls, Bozeman, Helena or any other Montana municipality. Contact the Montana Commissioner of Securities and Insurance at 800-332-6148 or the Motor Vehicle Division if you're uncertain about your vehicle's classification.

Montana Commercial Auto Insurance Alternatives

Three alternatives to a standard commercial auto policy exist under Montana's financial responsibility law, MCA § 61-6-301. These options apply to businesses that can meet the financial thresholds below; most small fleets with fewer than 25 vehicles will need a standard policy instead.

Surety bond: File a surety bond with the Montana Department of Justice meeting at least the state's 25/50/20 minimum liability thresholds. The bond stays active as long as you operate the vehicle on public roads. A lapse carries the same penalties as driving uninsured.
Self-insurance: Businesses with 25 or more registered vehicles in Montana can apply for a self-insurance certificate through the Montana Department of Justice. You'll need to prove financial capacity to cover liability claims at or above state minimums, and the state retains the right to revoke the certificate if your financial standing deteriorates.
Cash deposit: Deposit at least $55,000 in cash or securities with the Montana State Treasurer. The state holds the deposit for as long as you operate vehicles and can draw against it to satisfy liability judgments.

Special Montana Commercial Auto Insurance Coverage Circumstances

Beyond standard minimums, several Montana-specific situations can create coverage gaps or trigger additional requirements.

Leased commercial vehicles

Lease agreements almost always set liability floors above Montana's 25/50/20. Most lessors require $1 million CSL or more, with the lessee responsible for keeping active coverage. Before relying on state minimums, review your lease to confirm limits and verify the policy names both parties.

Canada border commerce

Three active ports of entry connect Montana to Alberta and British Columbia: Sweet Grass, Roosville and Piegan. Canadian provinces require a minimum of CA$200,000 in third-party liability, which already exceeds Montana's base limits when converted to U.S. dollars. Standard U.S. commercial policies often exclude international incidents, so you'll need a cross-border endorsement from your insurer. Review the U.S. Department of State travel advisory for Canada and confirm coverage before every crossing.

Seasonal and remote operations

Montana logging, ranching, oil field and tourism businesses routinely run vehicles on unpaved forest service roads or in areas hundreds of miles from the nearest claims adjuster. Many commercial policies exclude off-highway use or raise deductibles for locations outside Montana's incorporated areas. Verify your policy language covers the actual terrain and conditions your fleet encounters, not just paved public roads.

Tribal land operations

The Flathead, Crow, Blackfeet and other Montana reservations operate independent law enforcement and court systems. Some commercial insurers exclude claims filed in tribal courts, which can leave your business exposed for accidents on reservation roads. Ask your insurer directly whether tribal jurisdiction is covered and add an endorsement if it's not.

Montana Commercial Auto Insurance Enforcement and Penalties

Law enforcement in Montana verifies insurance electronically through the Montana Insurance Verification System (MTIVS) during traffic stops and after accidents. MTIVS doesn't cover commercially insured vehicles, so business operators need to carry physical proof of coverage marked "fleet" or "commercially insured."


First	$250–$500	No suspension	Proof of insurance required
Second (within 5 years)	$350	Registration suspended; restricted receipt for 90 days	Proof of compliance with MCA § 61-6-301, replacement plate and registration fees
Third+ (within 5 years)	$500 or up to 10 days in jail, or both	Registration suspended; restricted receipt for 180 days	SR-22 filing, proof of insurance, full process
Fourth+ (within 5 years)	$500 or up to 10 days in jail, or both	Driver's license surrender ordered	Department of Justice review, proof of compliance required

After a second or subsequent offense, your insurer must file an SR-22 certificate with the Montana Department of Justice that stays on file for three years, and any coverage gap during that period automatically re-suspends your registration. Montana's modified comparative negligence rule under MCA § 27-1-702 adds further risk: if you're more than 50% at fault and uninsured, you can't recover damages from the other party and you'll owe their damages out of pocket.

How to Verify Your Business Meets Montana Commercial Auto Insurance Requirements

Walk through these steps for each vehicle in your fleet to confirm compliance with Montana and, where applicable, federal rules.

1
Check exemption eligibility first
Determine whether any vehicles qualify under Montana's farm truck, off-road equipment or government self-insurance exemptions. Vehicles meeting the farm criteria in MCA § 61-1-101 or those that never touch public roads may not require commercial coverage.
2
Classify each vehicle by its business use
Pin down whether the vehicle carries passengers, hauls cargo, transports equipment or drives between job sites. Montana's coverage categories depend on vehicle function, not your industry.
3
Look up the GVWR for every vehicle
Check the driver-side door label for the weight rating. Anything at 10,001 pounds or above moves into Montana's $300,000 CSL tier at minimum, and federal rules may also apply.
4
Sort out state versus federal jurisdiction
Interstate cargo or passenger transport triggers federal FMCSA requirements. This applies even if your trucks stay in Montana but carry freight that originated in or is bound for another state.
5
Match liability limits to the right category
A light-duty van only needs 25/50/20. A Class B tow truck needs $500,000 CSL. A 16-passenger shuttle needs $5 million. Confirm each vehicle's limits reflect its actual requirement tier.
6
Audit how your policy classifies each vehicle
Montana insurers deny claims when the policy lists a vehicle under the wrong use category. Make sure classifications, named drivers and covered uses match reality.
7
Close cross-border, tribal and remote gaps
Vehicles crossing into Canada, operating on reservation roads or running forest service routes need endorsements that standard policies often exclude. Contact your insurer about each scenario and get written confirmation of coverage.

Montana Commercial Auto Insurance Requirements: Bottom Line

Your required coverage in Montana comes down to what your vehicles carry, how much they weigh, which class your tow trucks fall into and whether your routes reach across state lines or into Canada. The next move is matching each vehicle's policy classification and liability limits to the specific tier that governs its use.

Montana Commercial Auto Insurance Requirements: Next Steps

You've identified what Montana and federal law require for your vehicles. Requirements set a compliance floor, not a coverage ceiling, and in most cases the legal minimums won't fully protect your business financially.

If your goal is just legal compliance

Verify that every vehicle's liability limits meet the Montana or federal threshold for its category. Montana's base 25/50/20 covers light-duty vehicles, but tow trucks, passenger carriers and interstate haulers need $300,000 to $5 million depending on the classification, so confirm your insurer has each vehicle classified by its actual use when you get commercial auto insurance coverage.

If your vehicles are valuable or highly visible

At $20,000, Montana's property damage floor barely covers a fender-bender involving two newer vehicles in Billings or Missoula. Branded trucks, tool-loaded service vehicles and any fleet with public visibility create higher lawsuit exposure that the state minimum won't absorb.

If you transport passengers

Passenger transport operations need limits well above the state minimums for their capacity tier. A single accident involving multiple passengers in Bozeman or along I-90 can generate claims that exceed even the $250,000 CSL floor for small vehicles, and many facility agreements and contracts require higher coverage than the law mandates.

If you haul goods or equipment

Montana's $300,000 CSL starting point for medium-duty trucks doesn't account for the value of cargo or the higher recovery costs on rural highways and mountain passes. Size up your coverage to the worst-case load, not the legal minimum.

If your business signs contracts

Businesses that sign contracts should check insurance requirements in agreements with clients, property owners or platforms. Contractual limits frequently exceed Montana's legal minimums. Montana State University, as one example, requires all vendors to carry $1 million CSL auto liability, roughly 50 times the state's base property damage limit.

If your business operates near the Canadian border

Crossing at Sweet Grass, Roosville or Piegan means your vehicles need policies that satisfy both Montana law and Canadian provincial requirements, which start at CA$200,000 in third-party liability in Alberta and British Columbia. A standard U.S. commercial policy won't cover incidents across the border without a cross-border endorsement, and claims filed in Canadian courts fall outside most default policy language.

About Blest Papio

Blest Papio is a Content Producer at MoneyGeek specializing in small business insurance. With five years of experience in insurance and finance writing and hands-on perspective as a former business counselor, he understands the risks that come with running a business and what it takes to protect against them.

Blest focuses on commercial auto, cyber, property and specialty business insurance. He digs deep into policy details, regulations and provider offerings so businesses can find the coverage they need and avoid financial fallout. His goal is to translate technical insurance language and insurer offerings into guides you can act on.

Whether you're insuring company vehicles, managing cyber liability or protecting your commercial property, Blest aims to guide you through your risks to help you find coverage you truly need, not sell you a policy.

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sources

Montana State Legislature. "MCA § 61-6-103: Motor Vehicle Liability Policy Minimum Limits." Accessed March 23, 2026.
Montana Motor Vehicle Division. "Vehicle Insurance and Verification." Accessed March 23, 2026.
Federal Motor Carrier Safety Administration. "Insurance Filing Requirements." Accessed March 23, 2026.
U.S. Department of Transportation. "49 CFR Part 171 — General Information, Regulations and Definitions." Accessed March 23, 2026.
Montana Commissioner of Securities and Insurance. "Auto Insurance." Accessed March 23, 2026.
U.S. Department of State. "Canada International Travel Information." Accessed March 23, 2026.

Montana Commercial Auto Insurance Requirements

What Commercial Auto Insurance Is Required in Montana?

Montana Commercial Auto Insurance Requirements by Vehicle Weight

Montana Commercial Auto Insurance Requirements by Passenger Count

Montana Commercial Auto Insurance Requirements by Service Type

Montana Commercial Auto Insurance Requirements by Cargo Type

Montana Commercial Auto Insurance Requirements by Tow Truck Class

Montana Commercial Auto Insurance Requirement Exemptions

Montana Commercial Auto Insurance Alternatives

Special Montana Commercial Auto Insurance Coverage Circumstances

Montana Commercial Auto Insurance Enforcement and Penalties

How to Verify Your Business Meets Montana Commercial Auto Insurance Requirements

Check exemption eligibility first

Classify each vehicle by its business use

Look up the GVWR for every vehicle

Sort out state versus federal jurisdiction

Match liability limits to the right category

Audit how your policy classifies each vehicle

Close cross-border, tribal and remote gaps

Montana Commercial Auto Insurance Requirements: Bottom Line

Montana Commercial Auto Insurance Requirements: Next Steps

sources