Statute of limitations: how to win a motion to dismiss on time-bar

Filing a [motion](/insights/glossary/motion) to dismiss for [statute](/insights/glossary/statute) of limitations is one of the most powerful tools a defendant has. Done right, it ends the case before discovery, before depositions, and before any fact-finder ever weighs the merits. Done wrong, it tips off the plaintiff to weaknesses they can patch in an amended complaint.

This guide walks through how courts actually decide these motions, how to assemble the record you need to win one, and the traps that sink defendants who treat the limitations defense as an afterthought.

What a statute of limitations actually does

A statute of limitations is a legislatively fixed deadline for filing a particular type of claim. Every state has them. Every category of claim has one. The exact period depends on the claim and the jurisdiction:

Personal injury claims commonly run 2 to 3 years.
Written-contract claims commonly run 4 to 6 years.
Property damage often tracks personal injury, sometimes longer.
Federal civil rights claims under 42 U.S.C. § 1983 borrow the forum state's personal injury period.
Specialized claims (defamation, fraud, professional malpractice, products liability) often have their own carve-outs.

Two things make limitations a particularly attractive ground for early dismissal. First, it usually does not require fact-finding outside the complaint: the court compares the date the claim accrued against the filing date and applies math. Second, when the bar applies, dismissal is normally with prejudice, which means the plaintiff cannot refile.

The accrual rule controls everything

The single most important question in any limitations motion is when did the claim accrue? That is the moment the limitations clock starts running. Get this date wrong and the motion fails.

The default rule in most states and in federal court for federal claims is that a claim accrues when the plaintiff "knew or should have known" of the injury and its cause. See Wallace v. Kato, 549 U.S. 384, 391 (2007) (the standard rule that accrual occurs when the plaintiff has a complete and present cause of action). Courts call this the discovery rule.

But the discovery rule is not universal:

Some claims accrue at the moment of the wrongful act, regardless of discovery. Trespass and battery are common examples.
Contract claims usually accrue at breach, even if the non-breaching party does not learn of the breach for years.
Continuing-tort doctrines (nuisance, hostile work environment) treat the limitations clock as restarting with each new act, so the relevant date is the last actionable act, not the first.
Medical malpractice statutes in many states have a discovery rule modified by a hard "statute of repose" outer limit. See, e.g., Cal. Civ. Proc. Code § 340.5.

The defense brief must identify the controlling accrual rule for the specific claim, cite the controlling authority, and then show that the complaint's own allegations place accrual outside the limitations window.

Building the record from the complaint

A 12(b)(6) motion to dismiss on limitations grounds is decided on the pleadings. That means everything the defendant cites for the accrual date has to either appear in the complaint or be a matter of judicial notice. Three sources are typically available:

The complaint itself. Plaintiffs routinely plead dates: the date of the accident, the date the contract was breached, the date the plaintiff "discovered" the harm. Every one of those dates is a candidate accrual marker.
Documents attached or incorporated by reference. When the complaint attaches a contract, a letter, or a notice, the court can read those documents. See Tellabs, Inc. v. Makor Issues & Rights, Ltd., 551 U.S. 308, 322 (2007) (court may consider documents incorporated by reference at the pleading stage).
Judicially noticeable public records. Government filings, recorded deeds, prior judgments, and the like can usually be considered without converting the motion to summary judgment. See Fed. R. Evid. 201.

What the defendant cannot do is introduce extrinsic evidence (declarations, deposition excerpts, emails not attached to the complaint) without converting the motion to summary [judgment](/insights/glossary/judgment) under Rule 12(d). When that happens, the schedule slows down dramatically and the plaintiff gets discovery. Most experienced defense lawyers will not file a limitations motion at the pleading stage unless the accrual date is provable from the four corners of the complaint.

Tolling is the plaintiff's escape hatch

Even when the math looks bad for the plaintiff, several doctrines can pause or extend the limitations clock. The defendant's brief should anticipate each one and explain why it does not apply.

Minority and incapacity tolling

In most jurisdictions, the limitations clock does not run against a person who is a minor or who is mentally incapacitated at the time the claim accrues. The clock starts when the disability is removed. See Hardin v. Straub, 490 U.S. 536, 542-43 (1989) (state tolling rules for minors and incapacity apply to federal § 1983 claims borrowing state limitations periods).

If the complaint pleads facts suggesting the plaintiff was a minor or incapacitated, the defendant must address those facts head-on. A common posture: concede that minority tolling extends the deadline by X years, then show that even with the toll the filing was late.

Fraudulent concealment

When a defendant actively concealed the wrong from the plaintiff, equitable tolling pauses the clock until the plaintiff discovers (or reasonably could have discovered) the underlying claim. The doctrine has teeth: the plaintiff has to plead specific acts of concealment, not just that the defendant did not volunteer information. See Holmberg v. Armbrecht, 327 U.S. 392, 397 (1946) (fraudulent concealment tolls federal limitations periods).

Defense brief tip: if the complaint does not allege concealment with the kind of particularity Rule 9(b) requires, point that out. Conclusory allegations of "concealment" do not toll limitations.

Continuing wrongs

Where the harm is ongoing rather than a single discrete act, courts often treat each new wrongful act as restarting the clock. Hostile work environment, nuisance, and continuing trespass are textbook examples. See Nat'l R.R. Passenger Corp. v. Morgan, 536 U.S. 101, 117 (2002) (hostile work environment claim is timely so long as one act contributing to the claim falls within the limitations period).

The defense response is usually to distinguish the continuing wrong from a discrete act with continuing consequences. A single firing has continuing consequences (lost wages), but it is still one discrete act for limitations purposes.

Equitable estoppel

When the defendant induced the plaintiff to delay filing (for example, by representing that a claim would be resolved without litigation), the defendant may be estopped from raising limitations. This is fact-intensive and usually unsuitable for a 12(b)(6) ruling, but the issue should be flagged so the trial judge knows the doctrine and its limits.

Savings statutes

Many states have "savings statutes" that give a plaintiff a window (often six months to one year) to refile after a non-merits dismissal. A defendant who succeeds in dismissing one filing on procedural grounds may face a refiling that uses the savings statute. The brief should note whether a savings statute applies and, if so, whether the plaintiff has already exhausted it.

How to brief the motion

A clean limitations motion to dismiss has a predictable structure. Use it.

Introduction

Open with the math. "The complaint alleges that Plaintiff was injured on January 5, 2018. The applicable limitations period is two years. Suit was not filed until April 12, 2024, more than four years after the deadline." A judge who reads only the first paragraph should know exactly why the case is barred.

Statement of facts

Walk through the complaint chronologically. Every accrual-relevant date should be quoted with paragraph citations to the complaint. The judge should be able to verify each date without flipping back and forth.

Legal standard

Two paragraphs is usually enough. One paragraph on the 12(b)(6) standard. One paragraph on the limitations standard, citing the leading authority in the forum on dismissing limitations claims at the pleading stage. See Jones v. Bock, 549 U.S. 199, 215 (2007) (affirmative defenses may be raised by motion to dismiss when their applicability is clear from the face of the complaint).

Argument

Lead with the strongest theory. The standard structure is:

The applicable limitations period is X years.
The complaint shows accrual on date Y.
Filing on date Z was outside the window.
No tolling doctrine saves the claim, and here is why.

The fourth point is where most weak motions fail. Defendants who ignore tolling invite the plaintiff to amend and inject tolling allegations. A thorough motion either disposes of the tolling doctrines on the pleadings or shows that no factual basis for tolling has been alleged.

Conclusion

Ask for dismissal with prejudice. Limitations dismissals are nearly always with prejudice because amendment cannot revive a time-barred claim. See Foman v. Davis, 371 U.S. 178, 182 (1962) (leave to amend may be denied where amendment would be futile).

What courts get wrong and how to fix it

The two most common errors:

Treating limitations as a pure question of law when it isn't. Most states allow the plaintiff to raise tolling, accrual delay, or continuing-wrong theories in opposition without amending. A defendant who briefed the motion as pure law has to address those theories on the fly at oral argument. Avoid this by addressing every plausible accrual and tolling theory in the opening brief.

Confusing accrual with the date of the wrongful act. In discovery-rule jurisdictions, the wrongful act and accrual can be separated by years. The defense brief that conflates them gets the math wrong and forfeits credibility.

Recent doctrinal developments to watch

Several lines of cases are reshaping limitations practice:

The Supreme Court has continued to clarify accrual for civil-rights claims. See McDonough v. Smith, 588 U.S. 109 (2019) (fabricated-evidence § 1983 claim accrued when criminal proceedings terminated in plaintiff's favor).
State courts are split on whether the COVID-19 emergency orders that tolled state limitations periods apply to federal claims borrowing state periods. Practitioners should check the most recent forum-state decisions.
Statutes of repose continue to take on more importance as a backstop to discovery-rule tolling. See CTS Corp. v. Waldburger, 573 U.S. 1, 8 (2014) (distinguishing statutes of repose from statutes of limitations and noting that repose periods are not subject to equitable tolling).

The bottom line

Statute of limitations is the defendant's best path to ending a weak case at the pleading stage. The motion succeeds when the brief: identifies the right limitations period and accrual rule for the specific claim, walks the court through the math using dates from the complaint itself, and forecloses every plausible tolling theory. It fails when the defendant treats limitations as a one-paragraph throwaway, leaves tolling for the reply, or tries to introduce extrinsic evidence that turns the motion into a slower summary judgment fight.

For plaintiffs facing such a motion, the same map points to the response: contest accrual, plead tolling with specificity, and argue that any unresolved factual disputes preclude dismissal. The doctrine is favorable to defendants only when the complaint itself makes the case time-barred. A well-pleaded complaint that leaves accrual ambiguous usually survives.