Statute of Limitations for Unjust Enrichment / Restitution in Montana

Overview

In Montana, a claim framed as unjust enrichment or restitution usually lives or dies by the statute of limitations (SOL) that applies to the underlying legal theory. Courts often treat unjust-enrichment/restitution claims as governed by a general limitations period when no specific limitations rule clearly matches the type of claim.

For this Montana reference page, the governing rule is the general/default SOL period reported for civil actions, listed as 3 years under Montana Code Annotated § 27-2-102(3).

This page explains:

• What SOL period applies to unjust enrichment/restitution in Montana (based on the general rule),
• When the countdown typically starts,
• The most common exception categories that can change timing,
• The statute citation to reference in filings or demand letters,
• How to use the DocketMath tool to compute dates.

Limitation period

Default Montana rule (no claim-type-specific sub-rule found)

Based on the information provided for Montana, no claim-type-specific sub-rule was found for unjust enrichment/restitution. That means you should apply Montana’s general/default limitations period rather than a special category.

• General SOL period: 3 years
• General statute: **Montana Code Annotated § 27-2-102(3)

Practical meaning of the “3-year” period

A 3-year SOL means that, generally, the plaintiff must file the action within 3 years after the claim’s triggering event—often described in practice using concepts like:

• when the harm occurred,
• when the plaintiff discovered (or reasonably should have discovered) the basis for the claim, or
• when the plaintiff’s right to sue accrued.

Because unjust enrichment/restitution disputes can arise from different fact patterns (e.g., mistaken payments, benefits conferred without a contract, or payments later claimed to be unauthorized), the exact triggering point can be fact-dependent. If you’re using DocketMath, the tool focuses on the date arithmetic once you identify the relevant “start date” for the limitations clock.

Inputs that change the output

When you use DocketMath’s statute-of-limitations calculator, you’ll typically provide:

• Start date (the date you believe the SOL clock begins),
• Jurisdiction (Montana), and
• Claim type category (for this calculator run, you’ll use the general/default period).

Output changes based on the start date. For example:

Use this as a scheduling guide. Court filings still must comply with Montana’s procedural requirements and the case-specific accrual rules that may apply.

Key exceptions

Even when the baseline period is 3 years, timing can shift due to doctrines or statutory categories that toll the SOL (pause or extend it). Montana has several tolling concepts that can matter in civil disputes. This is not a claim-by-claim legal opinion—rather, it’s a checklist of exception categories to investigate early.

1) Tolling while a party is under a legal disability

If a party is under a qualifying disability, Montana law can pause the limitations clock. Disability-based tolling can be decisive in older disputes, especially when the potential plaintiff could not legally bring suit.

Checklist:

• Are any parties minors or otherwise covered by Montana disability tolling rules?
• Did the disability exist during part of the 3-year window?

2) Discovery-related timing issues

Unjust enrichment/restitution can involve a benefit conferred before the dispute is fully understood (for instance, later discovery that a payment was not authorized). If Montana law applies a discovery concept to your type of claim, the start date may not be the same as the payment or transaction date.

Checklist:

• What did the plaintiff know (or reasonably should have known) and when?
• Is there evidence of prompt investigation or delayed discovery?

3) Statutory tolling and special procedural events

Some events pause the SOL, such as certain notice procedures or pending related actions. If you already filed something else (e.g., in another forum) or there were procedural steps required before filing, you may need to account for how Montana treats those periods.

Checklist:

• Was there a prior action dismissed or superseded?
• Were any required preconditions satisfied, and on what date?

4) Fraud or concealment concepts

When a defendant’s conduct prevents discovery of the claim, concealment doctrines can affect when a claim is considered to accrue or whether the SOL is tolled.

Checklist:

• Is there evidence of concealment or misleading statements?
• When would the plaintiff have had a fair opportunity to discover the basis for the claim?

Statute citation

For Montana’s general/default civil statute of limitations applied here to unjust enrichment/restitution timing:

• Montana Code Annotated § 27-2-102(3) — 3-year general limitations period.

Because this page uses the general/default period (and no claim-type-specific sub-rule was found), the statute to cite in most baseline timing discussions is § 27-2-102(3).

Use the calculator

Use DocketMath to compute an end date for the 3-year SOL based on your chosen start date, using the statute-of-limitations tool.

Steps to get a usable deadline

1. Go to: ** /tools/statute-of-limitations
2. Set Jurisdiction to Montana (US-MT).
3. Use the general/default SOL period of 3 years (driven by Mont. Code Ann. § 27-2-102(3)).
4. Enter your start date (the date you believe the limitations clock begins).
5. Review the computed deadline and adjust the start date if you identify a credible accrual/discovery/tolling argument.

How to interpret the output

• The calculated date is your back-of-the-envelope filing deadline under the baseline rule.
• If an exception could apply (disability, tolling, discovery, concealment, or procedural pauses), you may need to modify the start date or extend the period depending on how the doctrine is applied in your scenario.

Quick example workflow

• Start date you enter: 2023-06-01
• Default SOL: 3 years
• Output deadline: around 2026-06-01

If you later find a credible basis that the claim accrued later, re-run the calculator using the corrected start date.

Sources and references

Start with the primary authority for Montana and confirm the effective date before relying on any output. If the rule has been amended, update the inputs and rerun the calculation.

• Mont. Code Ann. § 27-2-201

Related reading

• Choosing the right statute of limitations tool for Vermont — Tool comparison
• Statute of limitations in Singapore: how to estimate the deadline — How-to guide
• Choosing the right statute of limitations tool for Connecticut — Tool comparison