How long an employer has to sue an employee depends on the claim, but most deadlines fall between one and six years. These windows, called statutes of limitations, are set by the legal theory behind the lawsuit and the state where it’s filed. Federal claims like trade secret theft and unauthorized computer access run on their own clocks. Miss the deadline, and the right to sue is gone no matter how strong the case.
Deadlines by Type of Claim
The filing window turns on what the employer is suing over. Some claims run on federal law and apply the same everywhere. Others run on state law, where the numbers vary.
Breach of a Written Contract
Written contracts get the longest deadlines because the agreement itself is documented. Across the states, the range runs from three years on the low end to ten or more in a few jurisdictions. Most states land somewhere between four and six years. This is the window that typically applies to non-competes, non-solicitation clauses, and non-disclosure agreements.
Breach of an Oral Agreement
Oral contracts carry shorter deadlines because proving the terms depends on memory and credibility. Most states allow two to four years, with the overall range stretching from two to six.
Trade Secret Misappropriation
The federal Defend Trade Secrets Act gives employers a claim when an employee takes proprietary information such as customer lists, formulas, pricing strategies, or source code. The deadline is three years from the date the employer discovered the theft or should have discovered it through reasonable diligence.1Office of the Law Revision Counsel. 18 USC 1836 – Civil Proceedings A continuing theft counts as a single claim, so the clock doesn’t reset each time the employee uses the stolen information. Most states have their own trade secret statutes with similar windows, usually three to five years.
Unauthorized Computer Access
The federal Computer Fraud and Abuse Act allows a civil suit when an employee accesses a computer system without authorization and causes damage or loss. The deadline is two years from the wrongful act or two years from the date the damage was discovered, whichever is later.2Office of the Law Revision Counsel. 18 USC 1030 – Fraud and Related Activity in Connection With Computers This claim often comes up when a departing employee downloads files or logs into systems after leaving.
Theft or Conversion
When an employee takes company property or embezzles funds, the civil claim is usually called conversion. Most states give the employer two to three years to file, though some allow up to six. The short window makes prompt action important once a theft is discovered.
Defamation
Defamation claims have some of the tightest deadlines. Most states require the suit to be filed within one to two years of the defamatory statement being made or published. Reputational harm is treated as time-sensitive, and these claims grow stale quickly.
Breach of Fiduciary Duty Under ERISA
When the employee at issue manages retirement plans or benefit programs, ERISA sets the deadline. The employer must file within three years of gaining actual knowledge of the breach, or within six years of the breach itself, whichever comes first. If the employee committed fraud or actively concealed the breach, the deadline is six years from the date the employer discovered it.3Office of the Law Revision Counsel. 29 USC 1113 – Limitation of Actions
When the Clock Starts
The deadline doesn’t always run from the day the employee did something wrong. For most breach-of-contract claims, the clock starts the day the contract was broken. If an employee with a two-year non-compete goes straight to a competitor, the window opens on the first day of that competing employment.
For claims where the harm isn’t immediately obvious, courts apply the discovery rule. The clock starts when the employer actually discovered the wrongdoing or should have discovered it through reasonable diligence. The federal trade secret and computer fraud statutes build this rule directly into the law.1Office of the Law Revision Counsel. 18 USC 1836 – Civil Proceedings Many states apply it to other claims as well, though not all do.
The discovery rule matters most in embezzlement and data theft cases. An employee who skims money over several years and manipulates the books to hide it may not be caught until an outside audit turns up discrepancies. In that scenario, the clock starts when the audit revealed the loss, not when the first dollar was taken. There is a catch, though. The “should have discovered” standard means an employer who ignores obvious red flags can’t rely on the discovery rule. Courts expect reasonable vigilance.
What Can Pause the Deadline
Even after the clock starts, certain events can pause it. This is called tolling, and it effectively extends the total time an employer has to file.
Fraudulent concealment is the most common tolling scenario. When an employee actively hides their wrongdoing rather than simply staying quiet, many courts pause the limitation period until the employer uncovers the deception. The employer generally has to show two things: that the employee took affirmative steps to conceal the wrongdoing, and that those steps actually prevented the employer from discovering the claim.
The employee’s absence from the jurisdiction can also pause the clock. If a former employee moves out of state and cannot be served with legal papers, some states toll the limitation period for the duration of that absence. The doctrine has become less important with modern long-arm statutes that let lawsuits reach across state lines, but it still matters in some jurisdictions.
When the Employment Contract Changes the Rules
Many employment agreements include clauses that shorten the statute of limitations. An employer may require employees to agree that any lawsuit related to their employment be filed within six months or a year, rather than the two to six years state law would normally allow. Courts have generally upheld these provisions as long as the shortened period is not unreasonably brief and no specific statute prohibits it.
Not every state allows this. A handful have laws voiding any contract provision that sets a limitation period shorter than the statutory default. Others permit shortening but cap how much, sometimes prohibiting reductions greater than fifty percent of the standard period. When an employment agreement contains an unenforceable limitation clause, courts in most jurisdictions strike the clause rather than throw out the whole contract.
Mandatory arbitration clauses add another layer. If the contract requires disputes to go through arbitration, the arbitration agreement itself may set its own filing deadline, often shorter than what a court would apply and often buried in onboarding paperwork. An employer relying on a contractual deadline needs to confirm it’s enforceable in their state before counting on it.
What Happens If the Deadline Passes
An expired statute of limitations doesn’t automatically kill the case. It’s what the law calls an affirmative defense, meaning the employee has to raise it.4Legal Information Institute. Federal Rules of Civil Procedure Rule 8 – General Rules of Pleading An employer can technically file a late lawsuit, and if the employee never argues the deadline has passed, the case proceeds. In practice, any competent defense attorney will spot a blown deadline immediately.
Once the defense is raised, the court will almost certainly dismiss the claim. The merits stop mattering. It doesn’t matter how much money the employee took or how clearly they violated their non-compete. The window closed. This is where employers most often get burned: they know about the problem, they plan to sue eventually, and by the time they get around to it the deadline has quietly passed. Sitting on a claim is the fastest way to lose it.