Yes, you can sue a family member. No law shields relatives from civil accountability, so the same claims that work against a stranger — breach of contract, negligence, fraud, breach of fiduciary duty — work against a sibling, parent, spouse, or cousin. What changes is the terrain around the claim. Insurance policies sometimes exclude injuries between people who live together, a few states still keep pieces of old parent-child and spouse immunity doctrines on the books, filing deadlines can quietly expire while families try to work things out, and legal fees usually come out of your own pocket even if you win. Knowing those complications before you file is the difference between a claim that recovers money and one that costs more than it returns.
What Family Members Actually Sue Each Other Over
Most family lawsuits fall into a handful of familiar patterns. The legal claim looks the same as it would between strangers, but the facts tend to be messier because money and trust moved informally.
Unpaid loans are the classic breach-of-contract case. A sibling borrows $10,000, signs a promissory note, stops paying, and the lending sibling sues for the balance. Handshake deals can also be enforceable, but proving the terms of a verbal agreement is much harder, and a legal rule called the statute of frauds requires certain agreements to be in writing to be enforced at all — sales of land, leases longer than a year, and contracts that by their terms can’t be completed within a year are the common ones.1Legal Information Institute. UCC 2-201 Formal Requirements; Statute of Frauds If your brother orally promised to sell you his truck for $3,000, that agreement likely falls within the statute of frauds and would need a writing. For a straightforward oral loan repayable within six months, text messages, emails, or witnesses can carry the day, but a signed promissory note eliminates the problem entirely.
Personal injury claims between relatives are usually car accidents. The injured person files against the at-fault driver’s auto insurance; the family member is technically the defendant, but the real fight is with the insurer over fault and payout. A lawsuit becomes necessary when the insurer disputes the claim.
Property disputes also produce viable claims. If a brother borrows a sister’s car and totals it, and his insurance doesn’t cover the full repair cost, she can sue for the difference. Boundary disagreements between relatives who own neighboring land work the same way.
Inheritance fights are among the most emotionally charged. Will contests typically argue the person who made the will lacked mental capacity, or that another relative exerted undue influence over the terms. Separately, a beneficiary can sue an executor or trustee who mismanages estate assets, on a breach of fiduciary duty theory. Courts take that claim seriously because the executor holds a position of trust over other people’s money.
Elder financial exploitation is a growing area of family litigation. Adult children or other relatives with access to an aging parent’s finances may drain accounts, forge signatures, or pressure the elder into changing estate documents. Most states now provide a civil cause of action for financial exploitation of vulnerable adults, and some allow enhanced damages of double or triple the loss. These claims often overlap with criminal elder-abuse statutes, so a civil suit can run alongside or after a criminal investigation.
Insurance Problems You Won’t See in Ordinary Lawsuits
When the lawsuit is really a mechanism to reach insurance proceeds, as most family car-accident cases are, the policy itself can create obstacles that don’t exist between unrelated people.
Household Exclusion Clauses
Many auto liability policies contain a household exclusion that eliminates coverage for injuries to anyone who lives in the same home as the policyholder. Insurers justify the clause by pointing to the risk of collusion between relatives who might exaggerate a claim to collect a payout. If your policy has this exclusion and you’re injured by a family member you live with, the insurer may deny the claim entirely. Courts in some states have struck household exclusions down as contrary to public policy; others enforce them. The specific language of the policy, and your state’s law, both matter.
Step-Down Provisions
Even when a policy doesn’t exclude family claims outright, it may contain a step-down provision that reduces coverage for injuries to relatives. Instead of the full policy limit — say $100,000 per person — the insurer pays only the state-mandated minimum, which is often $25,000 or less. A family member’s claim can be worth a fraction of what a stranger’s would be under the same policy. Several state courts have invalidated step-down provisions on public-policy grounds, but the law varies widely.
Immunity Doctrines That Still Exist
Two old doctrines were designed specifically to block lawsuits between family members. Both have eroded significantly, but neither has vanished, and the rules vary by state.
Parental Immunity
The parental immunity doctrine traditionally bars a child from suing a parent for negligence, on the theory that lawsuits inside the household disrupt family harmony and parental authority. The trend over recent decades has been toward abolishing or sharply limiting the doctrine. At least two dozen states have either eliminated it or held that parents can generally be liable to their children for negligent conduct.
Where some form of the doctrine survives, courts have carved out substantial exceptions. Car accidents are the biggest: a child injured by a parent’s negligent driving can typically sue, but recovery is capped at the parent’s auto insurance coverage rather than reaching the parent’s personal assets. That structure lets the child recover without financially destroying the household. Injuries from a parent’s business activities and intentionally harmful conduct are also common exceptions, because the family-harmony rationale collapses in those settings.
Interspousal Immunity
Interspousal immunity once prevented spouses from suing each other for personal injuries, based on the outdated legal fiction that husband and wife were a single legal entity. The doctrine has been abolished in the vast majority of states and is no longer a meaningful barrier in most of the country. If your spouse’s negligence injures you, filing a claim is legally no different from filing against anyone else.
The Deadlines That Quietly Kill Family Cases
Every civil claim has a statute of limitations, a hard deadline after which you permanently lose the right to sue no matter how strong your case is. Miss it by a day and the court dismisses without ever looking at the facts. This is where family cases die more often than people realize, because relatives spend years trying to patch things up before consulting a lawyer.
The specific deadline depends on the claim type and the state. Personal injury deadlines across the country range from one year to six years. Written contract claims usually run longer, from roughly three years up to ten or fifteen in some states; oral contract deadlines tend to be shorter. The clock generally starts when the harm occurs or when you reasonably should have discovered it.
When the injured person is a child, most states pause the statute of limitations until the child turns 18, and the full period then begins running from the eighteenth birthday. The rule exists because minors cannot file lawsuits on their own and shouldn’t lose their rights because no adult acted for them in time. Exceptions apply in some categories of claims, and waiting until the last moment is still risky.
If you’re in active negotiation or mediation with a relative, a tolling agreement can buy time without forcing you to file. Both sides sign a written agreement pausing the limitations period for a set window. Negotiations continue without the pressure of an approaching deadline and without the hostility of a lawsuit landing mid-conversation. If talks fail, the clock resumes and you file then.
Who Pays the Lawyer
Under the American Rule, which applies in nearly all U.S. courts, each side pays its own attorney fees regardless of who wins. Sue your brother for $15,000 and win, and you collect $15,000 — but the $5,000 you spent on your lawyer stays spent. This is the opposite of most other countries, where the loser typically covers the winner’s legal costs.
Three exceptions can shift fees. If the original contract between you and the family member includes a fee-shifting clause, common in formal loan agreements, the winner can recover attorney fees as part of the judgment. Certain federal and state statutes authorize fee-shifting for specific claim types, such as discrimination or consumer protection violations. And courts have inherent authority to order a party who litigated in bad faith to pay the other side’s fees, though that exception is reserved for egregious conduct.
The practical result: in most family lawsuits, legal fees eat into your recovery. For smaller claims, that math often pushes people toward small claims court or mediation.
Small Claims Court for Smaller Disputes
For straightforward money disputes — an unpaid loan, property damage, unreturned deposits on shared housing — small claims court offers a faster and cheaper path than regular civil litigation. Filing fees typically run from about $10 to $75 for smaller claims, sometimes over $100 near the jurisdictional cap. Maximum claim amounts vary by state, from as low as $2,500 to as high as $25,000.
Small claims court strips away most of the complexity and cost of a regular lawsuit. Depositions and other formal discovery are generally unavailable, hearings are short, and many states either bar attorneys or make representation optional. You present your evidence to a judge or magistrate, the other side responds, and a decision often comes the same day. For a family loan dispute with a clear paper trail, this is often the most practical route.
The tradeoff is that the simplified process limits your ability to compel documents or testimony before trial. If your case depends on financial records the other side won’t hand over voluntarily, regular civil court gives you tools small claims court does not.
Alternatives Before You File
Suing a family member can permanently fracture the relationship, and the time and expense of litigation often exceed what people expect. Several alternatives resolve disputes without a courtroom.
Demand Letters
A demand letter is usually the first formal step. It’s a written notice, ideally on attorney letterhead, that spells out what the other person owes you, why you’re legally entitled to it, and what happens if they don’t pay or comply by a specific date. Many disputes settle at this stage because the letter signals seriousness and the other side would rather pay than litigate.
Mediation
Mediation brings in a neutral third party to help both sides talk through the dispute and find a resolution they can accept. The mediator doesn’t decide the case or take sides; the job is to keep the conversation productive, help each person understand the other’s position, and explore solutions neither had considered.2U.S. Department of Commerce. What is Mediation? Any agreement is voluntary. If mediation fails, you still have the right to sue. For family disputes where preserving the relationship matters, mediation is often the best first move after a demand letter.
Arbitration
Arbitration is more structured. Both sides present evidence and arguments to an arbitrator, who then issues a decision. When parties voluntarily agree in writing to binding arbitration, the decision carries the same weight as a court judgment and is enforceable under federal law.3Office of the Law Revision Counsel. 9 U.S. Code 2 – Validity, Irrevocability, and Enforcement of Agreements to Arbitrate Some court-annexed arbitration programs are non-binding, letting either side reject the award and request a trial. The key distinction is whether both parties signed a binding arbitration agreement before the process began. Arbitration is faster and more private than a trial, but you give up the right to appeal.
Taxes on What You Recover
Not every dollar you recover stays in your pocket. The tax treatment depends on what the money is meant to replace.
Damages for a physical injury — compensation for broken bones from a car accident your cousin caused, for example — are excluded from your gross income. Punitive damages are the exception; those are always taxable, even in a physical injury case.4Internal Revenue Service. Tax Implications of Settlements and Judgments
Settlements for non-physical harm get worse treatment. Recoveries for breach of contract, emotional distress not tied to a physical injury, defamation, or financial exploitation are generally taxable income. The IRS treats the money as replacing the economic loss you suffered, and that loss would have been taxed if you’d received it normally.4Internal Revenue Service. Tax Implications of Settlements and Judgments
Estate disputes have their own wrinkle. Winning a larger share of an estate is generally treated as an inheritance rather than income, and federal law excludes the value of property received through a bequest or inheritance from gross income.5Office of the Law Revision Counsel. 26 U.S. Code 102 – Gifts and Inheritances But if part of your estate claim covers services you provided the deceased, such as caregiving, that portion may be taxable as ordinary income. How the settlement agreement characterizes each payment matters enormously, which is why having a tax-aware attorney draft the language is worth the cost.