G.L. c. 260, § 4; Colucci v. Rosen, Goldberg, Slavet, Levenson & Wekstein, P.C., 25 Mass. App. Ct. 107 (1987)
Legal malpractice in Massachusetts — three years, and the case within a case
A claim in Massachusetts trial courts · Last verified August 26, 2026
Suing a lawyer is an ordinary negligence claim with two features that make it harder than any other professional negligence case.
You have to win twice. The case within a case rule requires the plaintiff to prove that, but for the lawyer's error, they would have prevailed in the underlying matter — and, where money is the object, that the judgment would have been collectible.
And the limitations period has its own statute. Actions against attorneys run on G.L. c. 260, § 4, not on the general tort period — a point that matters less than the correction below.
What the claim is
Your lawyer made a mistake, and it cost you the case, the deal, or the money.
Where the right comes from
Common law negligence, with the limitations period supplied by G.L. c. 260 § 4.
What a plaintiff has to prove
- An attorney-client relationship, which creates the duty;
- Breach of the standard of care — the skill and diligence of the ordinary lawyer in the circumstances;
- Causation, which is the case-within-a-case requirement; and
- Damages.
The case within a case
This is the element that defeats most legal malpractice claims, and it is not a technicality.
To show that the lawyer's error caused a loss, the plaintiff must try the underlying matter inside the malpractice case and prove they would have won it.
In a lost lawsuit, the plaintiff must prove they would have obtained a judgment — which means proving the original claim, against a defendant who is now represented by the lawyer's malpractice insurer and who will defend the underlying case as vigorously as the original defendant would have.
And, ordinarily, that the judgment was collectible. A lawyer who blew the limitations deadline on a claim against a defendant with no assets and no insurance has caused no measurable loss.
In a transactional matter, the plaintiff must prove what the deal would have looked like had the error not occurred — that the other side would have agreed to the missing term, that the property would have been marketable, that the will would have been upheld.
In a lost defence, the plaintiff must prove they would have obtained a better result than the one they got.
The practical effect is that a legal malpractice case is two cases in one file, and the plaintiff carries the burden on both.
How long you have to file — and the repose that does not exist
Three years, under G.L. c. 260 § 4. Its first paragraph places "actions of contract or tort for malpractice, error or mistake against attorneys, certified public accountants and public accountants" — along with several other categories — on a three-year period from accrual.
There is no seven-year statute of repose for attorneys. This is worth stating plainly because it is asserted often and it is wrong.
Section 4's second paragraph creates the seven-year repose, and it applies to a specific list: "actions of contract or tort for malpractice, error or mistake against physicians, surgeons, dentists, optometrists, hospitals and sanitoria." Attorneys are in the first paragraph, which has no repose at all.
The consequence is real. A client told their claim against a lawyer expired seven years after the error is being told something the statute does not say. What governs instead is the discovery rule.
The discovery rule does the work. The claim accrues when the client knew or reasonably should have known that they had suffered appreciable harm as a result of the lawyer's conduct. In litigation malpractice, that is frequently the moment the underlying case is lost or dismissed rather than the moment the error occurred.
The continuing representation doctrine can postpone accrual further. Where the lawyer continues to represent the client in the same matter, the period may not run while that representation continues — the client is entitled to rely on the lawyer to fix the problem.
A contract claim against the lawyer is also within § 4's three years; the section covers actions "of contract or tort."
What has to happen before you file
Get the file. The client owns it, and the underlying case cannot be reconstructed without it.
Expert testimony, which is required in all but the plainest cases — a missed deadline is sometimes obvious enough to go without, and a judgment call about strategy never is.
What the claim pays
The value of what was lost — the judgment that would have been obtained, the settlement that would have been reached, the deal term that would have been secured, less what was in fact recovered.
Fees paid to the lawyer, in an appropriate case.
Consequential damages, where foreseeable.
Twelve percent prejudgment interest.
No punitive damages at common law, and no attorney's fees on the negligence claim.
Chapter 93A, in narrow circumstances. The practice of law is in trade or commerce for 93A purposes, but Massachusetts requires more than negligence — 93A reaches deceptive or unfair conduct, such as concealing the error or misrepresenting the status of the case. Where it applies it brings the multiplier and mandatory fees.
Breach of fiduciary duty, where the lawyer's conduct involved a conflict, self-dealing or use of client confidences. That claim runs on the same three-year period but does not require the case-within-a-case showing in the same way, because the injury is the breach of loyalty rather than the lost case. See breach of fiduciary duty.
Which court
Superior Court, for most of these, given the amounts.
District Court or the Boston Municipal Court below the $50,000 threshold, though a malpractice case that small is unusual.
Who can be sued
The lawyer who handled the matter.
The firm, for the conduct of its lawyers.
Not, generally, a lawyer with no attorney-client relationship with the plaintiff — though Massachusetts recognises a narrow duty to a non-client in specific circumstances, most often an intended beneficiary of a will the lawyer drafted negligently.
Common defenses
- No breach — the decision was a judgment call within the range of competent practice, which is the defence in every strategy case.
- No causation — the underlying case would have been lost anyway, which is where the case-within-a-case rule does the defendant's work.
- The judgment would not have been collectible.
- The client caused the loss — failed to appear, withheld information, rejected sound advice.
- Comparative negligence.
- Limitations, subject to the discovery rule and continuing representation.
- The claim is about the fee, which is a fee dispute rather than malpractice.
What people get wrong
There is no seven-year repose for lawyers. That period is in the second paragraph of § 4 and applies to medical providers. Attorneys are in the first paragraph, three years, no repose.
Losing a case is not malpractice. Lawyers lose winnable cases, and the standard is competence, not success.
You have to prove you would have won. The case within a case is the reason most of these claims fail, and it means litigating the old case all over again.
Collectability matters. A perfect claim against an empty defendant is worth nothing, and the malpractice claim inherits that.
The clock may not have started when the error did. The discovery rule and continuing representation frequently postpone accrual to the day the case was lost.
Negligence alone is not a 93A claim. Deception or unfairness is required, and it is what makes concealing the error worse than the error.
Where it came from
Legal malpractice was slow to develop as a field, for reasons that had less to do with doctrine than with practice: lawyers did not sue lawyers, insurers were scarce, and the case-within-a-case burden made most claims uneconomic.
That burden is not an accident of pleading. It follows from what negligence requires. A lawyer's error is only a cause of loss if the client would have done better without it, and the only way to know is to decide the underlying matter. Every alternative — presuming loss from the error, awarding the value of a chance — has been considered by courts elsewhere and largely rejected, because it would make lawyers insurers of outcomes they never guaranteed.
The Massachusetts limitations structure reflects a different judgment. When the Legislature added the seven-year repose in the 1970s, it was responding to the medical malpractice insurance crisis, and it wrote the repose into a paragraph naming physicians, surgeons, dentists, optometrists, hospitals and sanitoria. Attorneys were left in the first paragraph with the ordinary three years and the discovery rule.
That means a legal malpractice claim in Massachusetts can be brought long after the error, provided the client did not know and could not reasonably have known that they had been harmed — which, in a matter the lawyer is still handling, is often the case.
Common questions
How long do I have to sue my lawyer in Massachusetts?
Three years from when you knew or reasonably should have known you had suffered appreciable harm. Continuing representation in the same matter can postpone that.
Is there a seven-year deadline?
Not for attorneys. The seven-year repose in G.L. c. 260 § 4 applies to physicians, surgeons, dentists, optometrists, hospitals and sanitoria — not to lawyers.
Do I have to prove I would have won the original case?
Yes. Massachusetts applies the case-within-a-case rule, and in a money case you generally also have to show the judgment would have been collectible.
Is losing a case malpractice?
No. The standard is the skill and diligence of an ordinary competent lawyer, not a successful result.
Can I recover attorney's fees?
Not on the negligence claim. A chapter 93A claim requires deceptive or unfair conduct beyond negligence — concealing the error, for instance — and then carries mandatory fees.
Can I sue a lawyer who never represented me?
Rarely. Massachusetts recognises a narrow duty to a non-client in limited circumstances, most often an intended beneficiary of a negligently drafted will.