Montana Statute of Limitations: Time Limits by Case Type

Montana's statute of limitations laws establish mandatory filing deadlines that determine whether a civil claim or criminal prosecution can proceed. These deadlines vary significantly by case type — from 2 years for personal injury claims to 10 years for written contracts — and missing them extinguishes legal rights regardless of the underlying merits of a case. This page covers the major time limits codified in Montana law, the mechanisms that start, pause, or reset those clocks, and the structural boundaries that define when exceptions apply.

Definition and scope

A statute of limitations is a legislatively enacted deadline that sets the maximum period within which a legal action must be initiated. In Montana, these deadlines are codified primarily in Title 27, Chapter 2 of the Montana Code Annotated (MCA), which governs civil actions. Criminal prosecution timelines are addressed separately under MCA Title 46.

The statute of limitations framework in Montana serves two structural functions: it protects defendants from defending against stale claims where evidence has degraded, and it incentivizes plaintiffs to pursue remedies promptly. Critically, these are jurisdictional in character — courts will dismiss an untimely claim upon a properly raised defense, regardless of the factual strength of the underlying cause of action.

Scope of this page: This reference covers civil and criminal statutes of limitations under Montana state law as administered through the Montana state court system. It does not address federal statutes of limitations applicable in the Federal Courts in Montana, tribal court jurisdictions governed by tribal codes (see Montana Tribal Courts), or contract-based limitations clauses that may shorten or modify statutory periods by agreement. The regulatory context for Montana's legal system provides additional framing on how state law interacts with federal and tribal authority.

How it works

The limitations clock — called the "accrual date" — typically starts running on the date the cause of action accrues. Under MCA § 27-2-102, a claim accrues when all elements of the claim exist and the claimant has, or reasonably should have, discovered the facts underlying the claim.

Discovery rule: Montana follows a modified discovery rule. The limitations period begins not necessarily at the moment of injury, but when the plaintiff discovered — or through reasonable diligence should have discovered — the injury and its cause. This is particularly significant in latent injury cases such as toxic exposure or medical malpractice.

Tolling mechanisms pause the running of the statutory clock under specific circumstances:

1. Minority — If the plaintiff is under 18 at the time of accrual, the statute of limitations is tolled until the plaintiff reaches the age of majority, per MCA § 27-2-401.
2. Mental incapacity — A person who lacks legal capacity at accrual has the clock tolled during the period of incapacity.
3. Fraudulent concealment — If a defendant actively conceals the existence of a claim, the period is tolled until the plaintiff discovers or should have discovered the concealed facts.
4. Absence from the state — If a defendant is absent from Montana during the limitations period, that absence period is excluded from the calculation under MCA § 27-2-403.

Once the period has run — and no tolling exception applies — the claim is time-barred. Filing a complaint does not automatically preserve the claim; proper service must also be completed within the timeframes set by the Montana Rules of Civil Procedure, Rule 4(t).

Common scenarios

The following time limits reflect the periods codified under MCA Title 27, Chapter 2, organized by claim type:

Criminal limitations: For criminal matters, MCA § 46-11-101 specifies that felony prosecutions with no explicit statutory period generally carry a 5-year limitation. Certain serious offenses — including homicide, sexual assault of a minor, and incest — carry no statute of limitations under Montana law. Misdemeanor prosecutions generally must be filed within 1 year of the offense.

For context on how Montana personal injury and tort law interacts with these deadlines, the 3-year period for negligence-based torts is among the longer windows in the region compared to states such as Colorado (2 years) and Idaho (2 years), reflecting a deliberate legislative policy choice codified in Montana's MCA.

Decision boundaries

Several threshold questions determine which limitations period applies to a given claim:

Written vs. oral contracts: The 8-year period for written contracts versus the 5-year period for oral contracts represents one of the most practically significant distinctions. Whether a contract is "written" for MCA § 27-2-202 purposes turns on whether its material terms are reduced to a signed, integrated document — not merely whether some writing exists.

Malpractice vs. general negligence: A claim against a licensed professional may be governed by the professional malpractice period (3 years under MCA § 27-2-206) rather than the general negligence period. The classification depends on whether the allegedly negligent act was within the professional's licensed scope of practice — a distinction courts examine case-by-case. For attorney-specific malpractice, the Montana Bar Association and attorney licensing framework defines the professional standard against which conduct is measured.

Government defendants: Claims against state or local government entities require strict compliance with the Montana Tort Claims Act (MCA § 2-9-301 et seq.). A claimant must file a notice of claim with the governmental entity within 2 years of the act or omission giving rise to the claim before any lawsuit can be filed. This pre-suit notice requirement operates independently of — and can effectively shorten — the standard limitations period.

Family law matters: Statutes of limitations apply differently in family law. Actions to establish paternity, modify child support, or enforce parenting plans are governed by separate procedural timelines outside MCA Title 27, addressed through the Montana family law legal framework.

The Montana Supreme Court has consistently held that the limitations bar is an affirmative defense under Montana Rules of Civil Procedure Rule 8(c), meaning the defendant must raise it in a pleading or it may be waived. For litigants navigating these thresholds without counsel, the resource landscape is described at Montana legal aid and pro bono resources and through the broader Montana legal services authority index.

References

• Montana Code Annotated, Title 27, Chapter 2 — Limitations of Actions
• Montana Code Annotated, Title 46 — Criminal Procedure
• Montana Code Annotated, § 2-9-301 — Montana Tort Claims Act
• Montana Legislature — Official MCA Search
• Montana Supreme Court — Rules of Civil Procedure
• Montana Courts — Self-Help Center