Statute of Limitations for Unjust Enrichment / Restitution in Oregon

Overview

In Oregon, claims framed as unjust enrichment or restitution are usually treated as claims for relief sounding in quasi-contract (or, depending on the facts, equitable remedies). That framing matters because the statute of limitations (SOL) determines the last day you can file in court—not the day you discovered the problem.

In practice, Oregon courts typically apply an SOL keyed to the underlying duty and the nature of the request (money damages vs. equitable relief), rather than the label “unjust enrichment.” For DocketMath users, the goal is to model the SOL logic you’d typically see applied, including when the clock starts and how certain exception paths can extend time.

If you’re tracking a potential claim timeline, DocketMath’s statute-of-limitations calculator can help you convert dates into deadlines in a repeatable way. You’ll get more accurate results when you enter the facts that control the SOL analysis—especially the date of accrual (often tied to discovery in limited contexts).

Limitation period

The core rule (general limitation for restitution-type claims)

Oregon’s default civil SOL for many contract-like or quasi-contract claims is commonly treated under Oregon’s general timing framework for written vs. oral agreements and, in many restitution scenarios, is analyzed under the category that aligns with the legal duty to pay when equity requires it.

For unjust enrichment / restitution claims seeking money (a common posture), Oregon generally applies a 6-year limitation period under the state’s general limitation statute for obligations not otherwise specifically designated. This means that if the cause of action accrues and is not otherwise tolled or extended, you typically must file within 6 years.

When does the clock start?

The “accrual date” is often the pivotal input. In straightforward cases, accrual can track the date the defendant’s alleged enrichment becomes wrongful and the claimant can sue. In more complex fact patterns, accrual may turn on:

• Discovery concepts (when Oregon law permits or requires discovery-based accrual)
• When performance or payment occurred (e.g., when the transfer that is alleged to be unjust happened)
• Continued treatment of the transaction (e.g., installment payments)

Because accrual can be fact-specific, the DocketMath calculator is designed around a user-provided accrual date to reflect the theory you’re using.

How output changes as inputs change

When you use DocketMath’s statute-of-limitations calculator, your final “last day to file” typically changes in these ways:

• Accrual date later → deadline later
  Moving accrual from 2021-03-01 to 2021-09-15 pushes the 6-year window accordingly.

• Different legal bucket → different SOL
  If the claim is better characterized as arising from a different statutory category (for example, a claim governed by a specific statute rather than the default general rule), the deadline can change materially.

• Tolling/extension inputs (if applicable) → deadline later
  Tolling can postpone the clock, sometimes substantially, depending on the condition (e.g., disability, certain legal disabilities, or specific statutory tolling mechanisms).

Key exceptions

SOL exceptions in Oregon aren’t one-size-fits-all. For unjust enrichment / restitution scenarios, the most practically relevant “exception paths” tend to involve tolling and how accrual is determined.

Here are the key categories to evaluate when building your timeline:

• Tolling based on legal disability
  Oregon law contains tolling rules for certain claimants who are under specified disabilities. If a claimant qualifies, the SOL may pause or be extended.

• Accrual tied to discovery (when allowed by the theory and statute)
  Some causes of action accrue when a person knows or should know of the facts giving rise to the claim. If the applicable Oregon rule allows discovery-based accrual, you may treat “discovery date” as the accrual input rather than the “transaction date.”

• Fraud or concealment concepts (where recognized for the theory)
  Oregon recognizes legal doctrines that can affect when a claim accrues or whether the SOL is tolled due to wrongdoing that prevents discovery. Whether those doctrines apply depends heavily on the underlying claim and proof.

• Equitable relief vs. money damages framing
  Restitution can be sought as an equitable remedy. In some procedural postures, courts analyze timeliness by reference to the equitable nature of the requested relief (including potential limitations doctrines). That means two filings with similar facts but different remedies can produce different timeliness outcomes.

Statute citation

For Oregon, unjust enrichment and restitution claims are most commonly evaluated using the general civil statute of limitations for actions upon obligations not otherwise specified, which is typically a 6-year period.

Use this key Oregon citation when mapping the deadline:

• ORS 12.080 — generally provides a 6-year limitation period for certain civil actions not governed by a different specific statute.

Because Oregon’s SOL analysis depends on how the claim is characterized, your precise citation can shift if the claim actually fits a specific statutory scheme (rather than the general obligation framework). DocketMath’s calculator is built to reflect the most common SOL pathway for restitution-style claims, but the correctness of the result depends on selecting the right “bucket” for your theory.

Use the calculator

DocketMath’s statute-of-limitations calculator helps you translate Oregon SOL timing rules into a concrete filing deadline.

Recommended inputs to enter

Use these inputs to produce the most useful output:

• Jurisdiction: Oregon (US-OR)
• Claim type: Unjust enrichment / restitution (money damages framing)
• Accrual date: The date you believe the cause of action accrued under your theory (transaction date, payment date, or discovery date—depending on the facts)
• Tolling/extension: If you’re modeling an exception path, include the relevant start/end dates for the period you contend the clock should be paused (when known)

What the calculator output will show

Depending on your inputs, DocketMath will produce:

• Estimated deadline to file (based on the SOL length from the selected rule)
• Elapsed time between accrual and the modeled “today” date
• Remaining time until the deadline

How to sanity-check the results (quick checklist)

To start converting your dates into a deadline, use:

• /tools/statute-of-limitations

Sources and references

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

• Or. Rev. Stat. § 12.010

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