You can sue siblings for not taking care of your parents, but the lawsuit only has a real chance of succeeding in a few specific situations: when siblings had a written agreement to share caregiving costs and one broke it, when a sibling holding power of attorney breached their fiduciary duty to the parent, or when one sibling was unjustly enriched by another’s unpaid caregiving labor. Filial responsibility laws sound like they should apply here, but they almost never do between family members. In most cases, mediation, a written personal care agreement, or a claim against the parent’s estate will get you further than a lawsuit against a sibling.
Legal Theories That Actually Work Between Siblings
Courts generally treat adult children’s care for aging parents as a moral obligation, not a legal one. That means “my sibling isn’t doing their share” is not, by itself, a cause of action. You need a specific legal theory that fits the facts. Three come up most often.
Breach of Contract
If your siblings agreed to share caregiving duties or expenses and one of them broke the agreement, you may have a breach of contract claim. The agreement has to be concrete and provable. A written arrangement spelling out who handles which responsibilities, how costs get split, and what happens if someone doesn’t follow through is much stronger than a verbal understanding that everyone would pitch in. Without documentation, courts will treat caregiving contributions as voluntary family support rather than an enforceable obligation.
Even an email exchange where siblings agree to split costs can serve as evidence of a contract. It is not as good as a signed agreement, but it beats a handshake.
Unjust Enrichment
An unjust enrichment claim argues that a sibling unfairly benefited from your caregiving labor without paying their share. To succeed, you need to show three things: a real benefit was conferred on the sibling, the sibling knew about or appreciated that benefit, and letting them keep it without compensating you would be unfair.
This is where a lot of claims fall apart. If your sibling lives across the country, never asked for your help, and received no direct financial benefit from your caregiving, proving enrichment is hard. The theory works better in situations where your care preserved something the sibling later inherits (the family home holds its value, for example) or where you covered nursing home bills that the sibling would otherwise have had to help pay.
There’s another problem. If you provided care voluntarily as a family gift with no expectation of repayment, courts won’t retroactively treat it as a compensable service. Your intent to be reimbursed has to be documented from the start, not reconstructed later.
Breach of Fiduciary Duty
The strongest claim between siblings usually involves a sibling who holds power of attorney or serves as legal guardian for the parent. That role creates a fiduciary duty to act in the parent’s best interests, which includes using the parent’s assets appropriately for their care. If a sibling with financial power of attorney neglects the parent’s medical needs, diverts the parent’s money for personal use, or refuses to spend it on necessary care, that is a breach of fiduciary duty and courts take it seriously.
Unlike the messier theories above, fiduciary duty claims have well-established legal standards. A successful case can result in the court removing the sibling from their role, ordering a full accounting of how funds were spent, and awarding damages. If your dispute involves a sibling controlling your parent’s finances rather than a sibling simply refusing to help, this is likely your strongest angle.
Why Filial Responsibility Laws Usually Don’t Help
Roughly 27 states still have filial responsibility statutes on the books requiring adult children to support parents who cannot afford their own care.1National Conference of State Legislatures. States Spell Out When Adult Children Have a Duty to Care for Parents On paper, this looks like the exact tool a caregiving sibling would want to use against a non-contributing one. In practice, it almost never works that way.
These statutes trace back to colonial-era poor laws that made families responsible for destitute relatives instead of the public. They were designed to let creditors and government agencies recover costs, not to let siblings settle scores between themselves. When filial responsibility laws do get enforced today, the plaintiff is almost always a nursing home chasing unpaid bills or a state Medicaid program seeking reimbursement. The best-known example is a Pennsylvania case in which a nursing home won a judgment of roughly $93,000 against a son for his mother’s unpaid care costs. That case was brought by the facility, not by a sibling.
Most of these statutes don’t clearly create a private right of action between family members. Courts also require proof that the parent is genuinely indigent and that the sibling being sued has the financial ability to contribute. Even in states with active enforcement, judges are reluctant to referee family caregiving disputes without something more concrete to work with. So if you were hoping filial responsibility law would let you drag your sibling in and force them to pay, the honest answer is that it almost certainly won’t.
Claims Against a Parent’s Estate
Many caregiving siblings don’t think about legal claims until after the parent dies and the estate is being divided. The rule here is straightforward but unforgiving. Without a written agreement, courts generally treat caregiving payments and labor as voluntary gifts, not loans or compensable services.
The strongest basis for an estate claim is a written agreement: a promissory note, a personal care contract, or a clear letter signed by the parent acknowledging the debt and promising repayment. Verbal agreements are harder to prove but may hold up if supported by testimony from people who heard the parent acknowledge the arrangement, along with meticulous records showing the caregiver treated payments as loans rather than gifts. A sibling who paid for a parent’s essential medical care or housing might argue an implied contract existed for “necessaries,” but the bar is high and courts apply it inconsistently.
The practical lesson: if you are providing care or paying expenses for a parent and you expect to be compensated, document the arrangement in writing while the parent is still competent to sign. Waiting until the estate is in probate is almost always too late.
Personal Care Agreements Prevent Most of These Disputes
The best legal tool available to a caregiving child is not a lawsuit at all. It is a personal care agreement, sometimes called a caregiver contract or elder care contract. This is a written contract between the parent and the child providing care that spells out what services will be provided, how often, and at what rate of pay. Signing one before care begins protects you legally, keeps the arrangement clean for tax purposes, and prevents Medicaid problems later.
A properly drafted agreement should include:
- A start date and duration, whether a set period or the parent’s lifetime.
- Services described in detail, such as transportation to appointments, meal preparation, medication management, and bathing assistance.
- Hours and frequency, using flexible language like “no fewer than 20 hours per week” to accommodate changing needs.
- A compensation rate and payment schedule, typically weekly or biweekly.
- Signatures from both parties and a clause requiring written mutual agreement for any changes.
Compensation has to reflect fair market value for the services provided, roughly what a home care agency in your area would charge. Paying a family caregiver $50 an hour in a market where professional aides charge $25 can create serious Medicaid problems. Call two or three local home care agencies, document the going rates, and keep detailed daily logs of the care you provide, including dates, hours, and specific tasks.
Medicaid imposes a five-year lookback period when someone applies for long-term care benefits. Payments to a family caregiver without a formal agreement can be treated as gifts rather than compensation during that review, which triggers a penalty period during which the parent is ineligible for coverage. A written agreement signed before care begins, with payments at fair market value and supporting documentation, converts what would otherwise look like a gift into a legitimate business transaction. Lump sums are harder to justify than regular paychecks, so biweekly or monthly payments are safer.
A personal care agreement also creates an employer-employee relationship for tax purposes. The parent is the household employer, and the caregiving child is the employee. Income taxes, Social Security, and Medicare generally apply to the wages, with some exceptions for younger children.2Internal Revenue Service. Topic No. 756, Employment Taxes for Household Employees
Try Mediation Before You Sue
Litigation between siblings over parent care almost always costs more in legal fees, family damage, and emotional energy than the dispute is worth. Mediation is faster and less destructive. A neutral mediator helps siblings talk through caregiving responsibilities, financial contributions, and decision-making authority without a judge imposing a solution. The goal is a written agreement everyone can live with.
Professional mediators who specialize in elder care and family disputes typically charge between $100 and $300 per hour, though rates vary by location and experience. A straightforward sibling dispute might resolve in one or two sessions. Some courts require mediation before allowing family disputes to proceed to trial anyway, so you may end up there whether you file a lawsuit or not.
Mediation works best when all siblings are willing to participate honestly. If one sibling refuses to engage, or a power imbalance makes negotiation unproductive, arbitration is a more structured option. An arbitrator hears evidence from both sides and issues a binding decision, functioning as a private judge. It’s faster and cheaper than court, but you give up the right to appeal.
When It’s Not About Money: Reporting Neglect
Sometimes the real problem is not that a sibling won’t chip in, but that a sibling with control over the parent is causing harm. Every state operates an Adult Protective Services program that investigates reports of elder abuse, neglect, and financial exploitation. If you believe a sibling’s failure to provide care, or their active mismanagement of your parent’s affairs, puts your parent at risk, you can file a report with your state’s APS office. Most states accept anonymous reports.
APS investigators assess the parent’s living conditions, health, and safety. If they substantiate neglect, the agency can arrange in-home care services, recommend guardianship proceedings, or in severe cases facilitate relocation to a safer environment. APS findings can also serve as evidence if you later pursue legal action. To find the correct APS office for your parent’s location, contact the Eldercare Locator at 800-677-1116, a free national service that connects callers with local aging resources.3USAging. Eldercare Locator
When a parent lacks the mental capacity to make safe decisions and no family member holds appropriate legal authority, any interested person can petition a court to appoint a guardian. Guardianship removes significant autonomy from the parent, so courts treat it as a last resort and may explore less restrictive alternatives first, such as supported decision-making arrangements. A court may also appoint a guardian ad litem, an independent investigator who evaluates the situation and recommends what outcome best serves the parent’s interests.
What to Do Before You Sue
If you are the sibling carrying the caregiving load and you are running out of patience, a lawsuit is rarely the right first move. Families that come through these disputes in reasonable shape tend to take a few practical steps early:
- Document everything now. Keep records of every expense you pay, every hour of care you provide, and every conversation with siblings about sharing responsibilities. Contemporaneous records are worth far more than after-the-fact recollections.
- Put agreements in writing. Even a brief email confirming what siblings agreed to can serve as evidence of a contract.
- Get a professional care assessment. A geriatric care manager or your parent’s physician can document the level of care your parent actually needs, creating an objective baseline that a non-contributing sibling can’t easily wave away.
- Explore whether cooperation is possible on the tax side. Sometimes a sibling who won’t help with caregiving will still coordinate on a multiple support agreement if there’s a benefit to them. Financial incentives can restart stalled conversations.
- Try mediation first. A few hundred dollars spent with a mediator is almost always a better investment than thousands in legal fees for a lawsuit with uncertain odds.
Outside of the specific scenarios described above (written agreements, unjust enrichment with a real provable benefit, and fiduciary duty claims against a sibling with power of attorney) the legal system gives you limited tools to force a sibling to share caregiving. The families that avoid the worst outcomes are usually the ones that put clear agreements in writing before resentment builds to the breaking point.