Can you sue your lawyer for missing a deadline?

Deadlines run through every kind of case. The most important is the statute of limitations on your underlying claim, the last day to file a lawsuit at all. After that come court deadlines: the time to answer a complaint, respond to discovery, oppose a motion for summary judgment, designate an expert, or file a notice of appeal. Missing some of these is fixable. Missing others ends the case.

The ABA's Model Rules of Professional Conduct treat this as a core duty. Rule 1.3 requires a lawyer to "act with reasonable diligence and promptness," and the official comment to that rule uses a missed statute of limitations as its example of how delay can destroy a client's legal position. Under ABA Model Rule 1.3, a lawyer must act with reasonable diligence and promptness, and the rule's own commentary names an overlooked statute of limitations as the extreme case of neglect.

Insurers have tracked this for decades. In the ABA Standing Committee on Lawyers' Professional Liability study covering 1996 to 1999, failure to know or ascertain a deadline accounted for 15.24% of claims, and all scheduling errors combined accounted for 28.49%. The most recent ABA profile, covering 2016 to 2019, reported that over one third of claims came from administrative errors such as failing to calendar deadlines or from client relations problems. Deadline problems remain one of the most common reasons clients sue.

Common patterns:

• A personal injury lawyer files the lawsuit a few days too late, or in the wrong state under the wrong limitations period.
• A lawyer misses a shorter notice deadline for a claim against a city, county, or state agency.
• A defense lawyer never answers, and the court enters a default judgment.
• A lawyer loses a ruling and never files the notice of appeal.
• A lawyer lets a case sit until the court dismisses it for failure to prosecute.

A missed deadline is almost always a breach of the standard of care. Lawyers are expected to know the limitations periods for the kind of case they take and to calendar them. Courts rarely accept "the law was unclear" as an excuse for a plainly stated filing deadline.

But breach alone does not make a malpractice case. It is not malpractice, in the legal sense, when:

• The case had no value. If you would have lost anyway, the missed deadline did not cause you a loss.
• The deadline had already passed before you hired the lawyer. A lawyer you consulted on day 800 of a two-year limitations period did not blow it.
• The court excused the lapse. Many procedural deadlines can be cured by a motion to extend time or to set aside a default. If the mistake was fixed, damages may be limited to the extra fees you paid.
• You caused the delay. If you ignored repeated written warnings to sign a complaint or provide records, the lawyer has a defense.

A lawyer who turns you down can still be responsible for deadline advice. In Togstad v. Vesely, Otto, Miller & Keefe (Minnesota Supreme Court, 1980), a lawyer told a woman at a free consultation that she had no medical malpractice case and never mentioned the two-year limitations period. The jury found an attorney-client relationship, found the lawyer negligent, and awarded $610,500 to her husband and $39,000 to her, and the Minnesota Supreme Court affirmed. In Togstad, a single consultation in which a lawyer failed to mention a two-year statute of limitations supported a $649,500 malpractice verdict.

Most states phrase the elements the way Pennsylvania did in Kituskie v. Corbman (Pennsylvania Supreme Court, 1998): the employment of the lawyer, the lawyer's failure to exercise ordinary skill and knowledge, and that the negligence was the proximate cause of damage. In deadline cases the first two are usually easy. The third is where cases are won or lost.

Proving causation means trying the case within a case. You show the jury the lawsuit that never happened: the accident, the injuries, the defendant's fault, and the verdict you would have obtained. In a missed deadline claim, you generally must prove by a preponderance of the evidence, meaning more likely than not, that you would have won the underlying case and recovered money. Read how the case within a case works before you decide whether to sue.

You will usually need an expert witness, though some courts say no expert is needed when the negligence is obvious to a layperson, and a blown limitations period is the textbook example. You may still need experts on the underlying case itself, such as a doctor in a lost medical malpractice claim. Some states also require a certificate of merit early in the case.

Collectibility

Winning the lost case on paper is not always enough. Many courts ask whether you could have actually collected the judgment. If the at-fault driver had no insurance and no assets, a $500,000 lost claim may be worth very little. In Kituskie, a lawyer missed California's one-year limitations period for a car crash, and a jury awarded $2,300,000. The Pennsylvania Supreme Court held that collectibility is relevant, and noted that most courts make the client prove it. Pennsylvania joined the minority and put the burden on the lawyer to prove the judgment would not have been collectible.

The basic measure of damages is what you lost: the amount you would have recovered in the underlying case, limited in many states by what you could have collected. If the lawyer's error exposed you to a default judgment, damages may be the judgment entered against you, to the extent you would have defended it successfully.

Item	Usually recoverable?	Notes
Value of the lost claim	Yes	Proved through the case within a case
Default judgment against you	Often	If you had a valid defense
Fees paid to fix the mistake	Often	Motions, appeals, new counsel
Lost punitive damages	Varies	Barred in California
Emotional distress	Rarely	Most states limit it

States differ on the edges. In California, a client cannot recover as malpractice damages the punitive damages the client would have won in the underlying case, under Ferguson v. Lieff, Cabraser, Heimann & Bernstein (California Supreme Court, 2003). Other states handle that question differently, and states also differ on whether the lawyer's unpaid contingency fee is deducted from the award. For a fuller breakdown, see how much a legal malpractice case is worth.

Here is the irony: the claim against the lawyer has its own short deadline. California Code of Civil Procedure section 340.6 requires suit within one year after you discover the wrongful act, or four years from the act, whichever comes first. That four-year limit is tolled while the lawyer keeps representing you on the same matter, while you have not suffered actual injury, and in some other situations. New York's CPLR 214(6) gives three years for non-medical malpractice, whether the theory is contract or tort.

Many states apply a discovery rule, so the clock starts when you knew or should have known about the mistake, and many recognize continuous representation tolling while the same lawyer is still handling the matter. Some also have a statute of repose that sets an outer limit regardless of discovery. Check your state on our statute of limitations table or your state page, such as California or New York.

1. Find out if it can still be fixed. Some procedural deadlines can be reopened by motion, often within tight windows. A new lawyer should look at this immediately.
2. Get your file. You are generally entitled to your client file. See how to get your case file.
3. Do not sign a release. ABA Model Rule 1.8(h)(2) bars a lawyer from settling a malpractice claim with an unrepresented client unless the client is advised in writing to get independent counsel and given a reasonable chance to do so.
4. Write down the timeline while you remember it: when you hired the lawyer, what you were told, and when you learned the case was lost.
5. Talk to a legal malpractice lawyer soon. Your own deadline may already be running. Our guide on what to do after a missed deadline walks through each step.

If you think a missed deadline cost you a case, a free case review takes about two minutes and can connect you with an independent attorney who handles legal malpractice claims in your state.