Truck Accident Laws in Montana (2026): Deadlines & Liability

A Montana truck accident is governed by two layers of law: Montana's own injury rules (the filing deadline and the state's fault rule) and the federal regulations that control how commercial carriers and drivers must operate. Montana is a traditional at-fault (tort) state, not a no-fault state, so an injured person pursues the at-fault driver and the motor carrier directly. Because the other vehicle is a commercial truck, federal safety rules often supply the evidence of negligence.

This page explains the Montana deadlines and liability rules that follow a crash with a semi, box truck, or other commercial vehicle, then the uniform federal rules that shape every interstate trucking case. It is general legal information, not legal advice.

What is the deadline to sue after a Montana truck accident?

Montana's statute of limitations for tort and personal-injury actions is three years, set by MCA 27-2-204. A truck-crash injury claim and a wrongful-death claim arising from a fatal crash generally must be filed within three years. The same statute carves out one exception: when a wrongful death results from a homicide, the period extends to ten years.

Three years is firm. Because trucking evidence can be overwritten within weeks, the practical timeline for investigating a truck case usually runs much faster than the formal deadline.

Montana's fault rule: modified comparative negligence (51% bar)

Montana follows modified comparative negligence under MCA 27-1-702. Contributory negligence does not bar recovery if the plaintiff's fault "was not greater than" the negligence of the defendant or the combined negligence of all defendants, but any damages are reduced in proportion to the plaintiff's share of fault.

In practical terms, this is a 51% bar. A plaintiff who is exactly 50% at fault may still recover (reduced by half), but a plaintiff who is 51% or more at fault recovers nothing. A plaintiff found 20% at fault recovers 80% of the damages. In a truck case, where the carrier's own regulatory violations frequently shift fault toward the trucking side, keeping the injured person's share at or below 50% is central to the case.

No-fault status: Montana is an at-fault state

Montana is not a no-fault state. It uses the traditional tort (at-fault) system, which means there is no mandatory personal injury protection (PIP) and no statutory injury threshold to clear before filing suit. After a crash, the injured person makes a claim against the at-fault driver and the motor carrier, and ultimately their liability insurers, and may recover both economic and noneconomic damages by proving the other side's negligence. This removes the threshold hurdle that exists in no-fault states, but it places the full burden of proving fault on the injured party.

Damage caps in Montana

Montana does not cap ordinary compensatory damages in a standard truck-injury case. Economic damages (medical expenses, lost earnings, future care) and noneconomic damages (pain and suffering) in an ordinary negligence case are not subject to a statutory cap. A separate cap on noneconomic damages applies in medical-malpractice cases, which is a different category from a truck crash.

Punitive damages are different. MCA 27-1-220 limits a punitive award to $10 million or 3% of the defendant's net worth, whichever is less, and punitive damages require clear-and-convincing proof of actual fraud or actual malice. Because these rules are technical, they are worth discussing with counsel early.

Minimum insurance in Montana

Montana requires every driver to carry at least 25/50/20 in liability coverage ($25,000 bodily injury per person, $50,000 per accident, $20,000 property damage) under the state's financial-responsibility law. That is the floor for ordinary drivers. Commercial trucks are subject to far higher federal requirements, covered next.

Federal FMCSA rules that govern trucking

Interstate commercial trucking is regulated by the Federal Motor Carrier Safety Administration (FMCSA) under Title 49 of the Code of Federal Regulations. These rules apply nationwide and frequently supply the proof of negligence in a truck case:

• Hours of service (49 CFR Part 395): A property-carrying driver may drive a maximum of 11 hours after 10 consecutive hours off duty, may not drive beyond the 14th hour after coming on duty, must take a 30-minute break after 8 hours of driving, and may not drive after 60 hours on duty in 7 days or 70 hours in 8 days.
• Electronic logging devices (ELDs): Most drivers must record their hours with an ELD that automatically captures driving time, making falsified-logbook fatigue easier to prove.
• Driver qualification and CDL: Drivers must hold a valid commercial driver's license and meet medical and qualification standards under the driver-qualification rules.
• Drug and alcohol testing: Carriers must conduct pre-employment, random, post-accident, and reasonable-suspicion testing.
• Vehicle maintenance and inspection (49 CFR Part 396): Carriers must systematically inspect, repair, and maintain their vehicles and keep records.

A logbook showing too many hours behind the wheel, a skipped inspection, or a missed drug test can become central evidence that the driver or carrier was negligent.

Who can be held liable after a truck accident

A truck crash routinely produces several defendants, often corporate, which is a key difference from a typical car accident. Depending on the facts, the responsible parties can include the truck driver; the motor carrier (both vicariously for the driver's on-the-job conduct and directly for negligent hiring, training, supervision, or retention); a freight broker or shipper; the company that loaded or secured the cargo; and the manufacturer of a defective part such as a brake or tire.

Identifying every potential defendant matters because each may carry separate insurance, and because a carrier's own safety failures (pushing drivers past their hours, ignoring maintenance) can be independent grounds for liability beyond the driver's mistake.

Federal minimum insurance for trucks

Under 49 CFR 387.9, an interstate for-hire motor carrier hauling general (nonhazardous) freight in a vehicle of 10,001 pounds or more must maintain at least $750,000 in public-liability coverage. Carriers hauling certain hazardous materials must carry far more, up to $5,000,000. These federal minimums dwarf typical car-insurance limits and are one reason serious truck claims are valued differently from ordinary car-crash claims.

Preserving evidence after a truck crash

Trucking evidence is perishable. A truck's engine control module (its onboard "black box") can record speed, braking, and throttle data; the driver's ELD and logbooks record hours; and the carrier's maintenance and inspection records can show neglect. Much of this data can be overwritten or lawfully discarded on a routine retention schedule within weeks. A prompt written preservation (spoliation) letter to the carrier, asking it to retain the ECM data, ELD records, dispatch records, and maintenance files, helps keep that evidence intact.

Also preserve the basics on your side: the police crash report, photographs of the vehicles and scene, the names of witnesses, and complete medical records documenting your injuries.

How to evaluate a Montana truck-accident claim

Most personal-injury attorneys handle truck cases on a contingency-fee basis (the fee is a percentage of any recovery) and offer a free initial consultation, so an early conversation usually costs nothing. No lawyer can promise a particular outcome or dollar amount; the value of any claim depends on the facts, the injuries, the available insurance, and the fault analysis.

The practical priorities after a Montana truck crash are to get medical care and document your injuries, report the crash and obtain the police report, identify the insurers involved, preserve evidence quickly, and keep the three-year deadline firmly in view.