Statute of Limitations for Unjust Enrichment / Restitution in Idaho

Overview

In Idaho, claims framed as unjust enrichment or restitution often revolve around the same core question: did one party receive a benefit that equity should require them to return? Even though these claims can be pleaded under different theories, Idaho’s statute of limitations (SOL) analysis commonly starts with the default limitation period for the type of action being pursued.

For purposes of this Idaho reference page, the key takeaway is straightforward: Idaho applies a general (default) SOL period of 2 years, under Idaho Code § 19-403. The general rule is not claim-type-specific here—meaning we did not identify a separate, longer/shorter limitations period specifically for unjust enrichment or restitution. Instead, the general/default 2-year period is the baseline you would use before looking for an exception or a different characterization of the claim.

If you’re trying to estimate deadlines in a case, DocketMath’s statute-of-limitations tool helps translate the statute into a calendar-friendly result.

Limitation period

Idaho’s general/default SOL: 2 years

Idaho’s general SOL period is 2 years under Idaho Code § 19-403. When you’re analyzing unjust enrichment or restitution in Idaho without a claim-specific sub-rule, treat this as your baseline limitation window.

What “2 years” means in practice

In SOL calculators, the two inputs that matter most usually are:

• Start date (accrual date): the point when the claim is considered to have started running
• Jurisdiction: US-ID for Idaho

DocketMath will use those inputs to compute a deadline date (and often an additional “latest safe filing date” depending on rounding rules).

How outputs change when inputs change

To make the impact concrete, here’s how the deadline typically shifts:

If the accrual date moves (for example, because the facts support a later “discovery” or a later completion of the wrongful conduct), the SOL deadline moves with it—you’re recalculating the same 2-year duration from a different start point.

Practical checklist before using the 2-year baseline

Before running the calculation, confirm you’ve identified the most defensible start date for the theory you’re using. Common factual anchors include:

• date money was paid
• date a benefit was conferred
• date the recipient’s obligation to return became apparent
• date of a disputed transaction’s finalization

Because the SOL can hinge on accrual, tightening the factual timeline often matters as much as the statute itself.

Key exceptions

Even with a 2-year baseline, Idaho SOL deadlines may be affected by doctrines that pause, delay, or otherwise change the running of time. While this page is focused on the general/default period for unjust enrichment/restitution, you should still check for exceptions that can alter the outcome.

1) Tolling and pauses in the running of time

SOLs can be affected when time is “paused” due to certain legal circumstances (for example, recognized tolling scenarios such as disability or other statutory grounds). These situations can make a claim timely even if it looks late under a simple “2 years from X” calculation.

2) Accrual disputes (when the clock actually starts)

A frequent reason cases disagree on SOL is not the duration (here, 2 years), but the start—i.e., whether accrual occurred at payment, at knowledge, at refusal to return, or at another event supported by the pleadings.

3) Different legal characterization can change the applicable statute

If a court treats the dispute as something other than unjust enrichment/restition—such as a different statutory or contract-based theory—the SOL could differ. This is one reason it’s valuable to align your timeline with the theory you plan to pursue.

Quick exception screening (use as a pre-calculation filter)

Use this list to decide whether you should do more than a straight 2-year computation:

If you checked “yes” to any item, consider running DocketMath with alternative start dates and documenting how each date connects to the pleadings.

Statute citation

Idaho’s general/default SOL period relevant to unjust enrichment/restitution analyses here is:

• Idaho Code § 19-403 — 2 years (general SOL)

This 2-year period is the baseline/default rule used in this page. No claim-type-specific SOL sub-rule was identified for unjust enrichment or restitution in the jurisdiction data provided, so the general period is applied as the starting point for the limitations analysis.

Use the calculator

DocketMath’s statute-of-limitations tool is designed to convert the Idaho default rule into a practical deadline you can work with: statute-of-limitations tool.

What you’ll enter

Set:

• Jurisdiction: US-ID (Idaho)
• Statute: (implicitly) Idaho Code § 19-403 (2-year general SOL)
• Start date (accrual date): the date you think the SOL began running

What you’ll get back

The calculator will compute:

• a deadline date using the 2-year period
• a way to visualize how changes to the start date impact timeliness

Input/output scenarios you can try

1. You think accrual was the payment date

   • Set start date = payment/benefit date
2. You think accrual was delayed

   • Set start date = the later factual trigger you can support
3. You’re evaluating risk

   • Run multiple versions (e.g., payment date vs. demand date) and compare deadlines

Sources and references

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

• Idaho Code § 5-219

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