Can You Sue Your Divorce Lawyer for Malpractice?

The most expensive mistakes in divorce cases tend to be about money, not feelings. A lawyer fails to do discovery and misses hidden assets. A lawyer accepts the other side's number for a closely held business without an independent valuation. A lawyer forgets to divide a pension, or never prepares the court order a retirement plan needs to split the account. Or a lawyer gives flatly wrong advice about what you could expect at trial, and you settle on that basis.

Family law is a steady source of claims. In the ABA's Profile of Legal Malpractice Claims covering 2020 to 2023, family law accounted for 10.02 percent of claims, fourth among all practice areas, down 2.79 percent from the prior study.

A leading example is Ziegelheim v. Apollo (N.J. 1992). The client told her lawyer she suspected her husband was hiding about $500,000 and asked for a thorough inquiry into his assets. She later claimed the lawyer's investigation was inadequate and that he told her she could expect only 10 to 20 percent of the marital estate. The New Jersey Supreme Court held that, if her evidence was believed, the lawyer very well could have been found negligent, and it sent the case back for trial.

This is the question most divorce clients ask, because nearly every divorce ends in a settlement the client signed. The majority answer is yes, you can still sue your own lawyer for negligent advice about the settlement.

The New Jersey Supreme Court held in Ziegelheim v. Apollo (1992) that a client's agreement to a negotiated settlement does not bar a malpractice claim against the lawyer who negligently handled the case. The court said lawyers must advise on settlements with the same skill and diligence as any other task. The Connecticut Supreme Court reached the same result in Grayson v. Wofsey, Rosen, Kweskin & Kuriansky (1994), affirming a $1,500,000 jury verdict for a client who settled her divorce on the third day of trial on her lawyers' advice.

Pennsylvania is the outlier. In Muhammad v. Strassburger (1991), the Pennsylvania Supreme Court held that a client who accepted a settlement cannot sue the lawyer for negligence in negotiating it unless the client proves actual fraud. Both the New Jersey and Connecticut courts expressly declined to follow that rule. If you settled in Pennsylvania, talk to a lawyer there before assuming you have a claim, and see our Pennsylvania page.

A disappointing ruling on custody, alimony, or property is not malpractice unless you can point to a specific error a competent family lawyer would not have made and show it changed the result. Family courts have wide discretion. A judge who awards less alimony than you hoped, or a custody schedule you dislike, has not proven your lawyer did anything wrong. The attorney judgment rule in many states protects reasonable strategic choices, such as settling to avoid the cost and risk of trial.

Emotional harm is also hard to recover. Divorce is painful, and a lawyer who was curt, slow, or expensive may deserve a complaint, but those problems usually belong in fee arbitration or a bar complaint rather than a lawsuit. The guide on what is not legal malpractice goes through the common cases.

You must show the lawyer fell below the standard of care of a reasonable family lawyer and that this caused you a financial loss. In settlement cases, that means proving you would have received more, either through a better settlement or at trial, with competent representation. That is the case within a case, applied to a divorce.

These cases usually need two kinds of experts. In Grayson, the client called a certified public accountant who testified the lawyers failed to properly value the marital estate and the husband's business interests, and an experienced family lawyer who testified the representation fell below the standard of care and that she would have received a larger property division and more alimony. A divorce malpractice claim typically needs an expert witness on the standard of care, and often a financial expert to value what was missed.

The divorce mistakes that most often lead to claims

Most successful divorce malpractice cases trace back to the financial side of the case. The table below lists common problems, what usually has to be shown, and the kind of expert who typically helps.

The advice cases deserve special attention. In Ziegelheim, the client's key allegation was that her lawyer told her she could expect only 10 to 20 percent of the marital estate. Wrong advice about the likely range of a divorce outcome can be negligence if a competent family lawyer would have known the range was different and the client settled because of it. The court stressed that lawyers are supposed to know the likely outcomes and the range of possible awards in the cases they handle.

Custody disputes are harder to turn into malpractice claims. A custody outcome is not a financial loss that is easy to measure, and courts decide custody based on the child's interests as the judge sees them. If your complaint is mainly about custody, a bar grievance or a motion to modify in family court may be the more practical route. And if the lawyer simply disappeared during the case, see abandonment and no communication.

The usual measure is the gap between what you received and what you would have received with competent representation. That can include a larger share of property, alimony or support you should have been awarded, the value of a retirement account that was never divided, and the legal fees you spend fixing the mistake.

In Grayson (1994), the Connecticut Supreme Court upheld a $1,500,000 verdict built on expert testimony that the client would have received a larger property share and more alimony with competent counsel. States apply their own property division and support rules in that calculation. Connecticut in Grayson measured the case against the state's equitable distribution and alimony statutes. A community property state would measure it differently. Your malpractice lawyer will need to rebuild the divorce under your state's rules.

Timing matters too. Asset values change, and a business worth little at the time of the divorce may be worth far more today. The comparison is often to what a competent lawyer would have obtained at the time, not to what the asset is worth now. Expect your experts to value things as of the divorce.

Fees are a separate question. If the lawyer overbilled you, see overbilling and fee disputes. For a broader look at values, see how much a legal malpractice case is worth.

The malpractice clock usually starts when you discover, or should have discovered, the mistake, subject to each state's rules. In California, you generally have one year from discovering the mistake, and never more than four years from the act, to sue a lawyer for malpractice. Many states pause the clock while the same lawyer keeps representing you on the matter. Check your state on the statute of limitations page.

Divorce errors are often found late, such as when you try to collect a pension share years afterward. Write down the date you learned of the problem.

1. Get your full file, including discovery and financial disclosures. See how to get your case file.
2. Ask a family lawyer whether the divorce judgment can still be reopened or corrected.
3. Collect proof of the assets or income that were missed.
4. Keep a timeline of the advice you received about settling.

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