Florida Statute of Limitations for Unjust Enrichment Claims

The Florida statute of limitations for unjust enrichment is four years, set by Florida Statutes section 95.11(3)(j), which covers legal or equitable actions on obligations not founded on a written instrument.¹ File after that window closes and the court will dismiss the case, no matter how strong the underlying facts are.

One boundary to clear up before anything else. If a written contract already governs the same subject matter, Florida law bars unjust enrichment entirely, and you’d need to bring a breach of contract action instead. Written contracts carry a five-year limitation period under the same statute. Unjust enrichment fills gaps where no contract applies; it isn’t a backup theory when a contract claim exists.

When the Four-Year Clock Starts

The period begins when the claim “accrues.” Under Florida Statutes section 95.031, a cause of action accrues when the last element of the claim falls into place.² For unjust enrichment, that moment is when the defendant has received and retained the benefit under circumstances that make keeping it without payment unfair. Preparation, expense, or partial performance on your side doesn’t start the clock. Completion of the benefit to the defendant does.

Florida measures accrual objectively, from the date the claim arises, not from the date you personally find out about it. Section 95.031(2) does allow a discovery-based start date, but it limits that rule to products liability and fraud.² Unjust enrichment is not on that list. If someone was enriched at your expense four years and one day ago and you only just learned about it, the standard rule treats the claim as time-barred.

What Can Pause the Deadline

Florida Statutes section 95.051 lists the specific grounds that toll a limitation period, and the statute is explicit that no other reason will do.³ The provisions most likely to matter in an unjust enrichment case:

The defendant is absent from Florida, and you cannot achieve valid service of process on them anyway.
The defendant uses a name unknown to you, making service impossible.
The defendant is concealed within Florida in a way that prevents service.
The person entitled to sue was adjudicated incapacitated before the claim arose, in which case the clock pauses during the incapacity.
The person entitled to sue is a minor with no parent, guardian, or guardian ad litem, or whose guardian has a conflict of interest.

The last two grounds carry a hard outer limit. Even with tolling for incapacity or minority, the case must be filed within seven years of the event that created the claim.³ That cap is easy to miss and easy to blow past.

Fraudulent Concealment and Equitable Estoppel

Separate from the statutory list, Florida courts recognize equitable estoppel when a defendant actively hides the wrongdoing. If deliberate steps kept you from discovering that the defendant was unjustly enriched at your expense, a court may refuse to let them use the statute of limitations as a shield.

Estoppel works differently from tolling. It operates after the limitation period has already run, blocking the defendant from raising the expired deadline as a defense rather than technically extending it. Proving it requires affirmative acts of concealment. Silence or a failure to volunteer information generally isn’t enough; the concealment has to be active and deliberate.

What Happens If You File Late

An expired statute of limitations is a complete defense. When no tolling ground applies and no estoppel argument succeeds, the court dismisses the case without reaching the merits.¹ The strength of your evidence and the size of the dollar figure make no difference once the deadline has passed.

The defendant does have to raise the defense; courts do not apply it on their own. In practice, competent defense counsel will raise it at the first opportunity. Once it’s on the table, the only routes around it are one of the statutory tolling grounds in section 95.051 or equitable estoppel based on fraudulent concealment.³ Both require specific facts that most cases don’t have. If you think you may have an unjust enrichment claim, the safest move is to identify the date the defendant received the benefit and count forward from there, treating four years as a firm ceiling and giving yourself margin to prepare and file well before it.

1
Florida Senate. Florida Code 95.11 – Limitations Other Than for the Recovery of Real Property
2
Florida Senate. Florida Code 95.031 – Computation of Time
3
Florida Senate. Florida Statutes 95.051 – When Limitations Tolled