An unmarried partner has no inheritance rights when the other partner dies without a will. Every state’s intestacy laws distribute a deceased person’s property to legal spouses, children, parents, and siblings in that order, and a long-term partner who was never married sits nowhere on that list. That is the baseline for unmarried partners’ inheritance rights without a will, and it holds no matter how many years you lived together, shared bills, or raised a household. The good news is that most of what the default rules take away can be put back through titling, beneficiary forms, and a short stack of estate planning documents signed while both of you are alive.
Why Intestacy Shuts You Out
When someone dies without a will, a statutory formula called intestate succession decides who gets their property. The surviving spouse inherits first, then children, then parents, then siblings, and eventually more distant relatives. Unmarried partners appear nowhere on that ladder.
If your partner dies with $200,000 in a bank account titled solely in their name and no will, that money goes to their next of kin, which could be a parent, a sibling, or a cousin they hadn’t spoken to in years. The probate court will not weigh whether you paid half the mortgage or spent fifteen years building a life together. The working assumption is that if someone wanted a non-relative to inherit, they would have put it in writing. Without that writing, biological and legal family wins every time.
This reaches beyond money. Furniture, vehicles, and personal belongings that you used together but that were titled in your partner’s name are part of the probate estate, and they follow the same intestacy order. You can be legally barred from keeping them.
What Still Passes to You Automatically
Not everything a person owns goes through probate. Some assets transfer based on how they are titled or who is named as beneficiary, and those transfers happen regardless of marriage.
Joint Tenancy With Right of Survivorship
When two people own property as joint tenants with right of survivorship, the deceased owner’s share passes automatically to the survivor. This applies to real estate, bank accounts, and brokerage accounts. The survivor usually needs only a death certificate and some paperwork to clear title. No probate court involved.
A couple of warnings. Tenancy by the entirety, which works similarly, is available only to married couples; unmarried partners cannot use it. And if a deed reads “tenants in common” rather than “joint tenants with right of survivorship,” there is no automatic transfer. The deceased partner’s share drops into the estate and passes under intestacy, potentially to their family instead of to you. The exact wording on the deed decides the outcome.
Payable-on-Death and Transfer-on-Death Accounts
Bank accounts, brokerage accounts, and in many states vehicle titles can carry a payable-on-death or transfer-on-death designation. The institution pays the named person directly when the account holder dies. The designation overrides intestacy because it is a contract between the account holder and the institution. Someone has to set it up, though. A checking account with no POD designation and no joint owner sits in the estate until probate finishes, which commonly takes six months to over a year.
Retirement Accounts and Life Insurance
401(k)s, IRAs, and life insurance policies pay out to whoever is named on the beneficiary form. The named beneficiary collects regardless of marital status.
Unmarried couples have both an advantage and a risk here. Married participants in employer-sponsored retirement plans have an automatic safeguard: federal law makes the spouse the default beneficiary, and changing that requires the spouse’s written, notarized consent. Unmarried participants face no such restriction, so you can freely name your partner. But there is also no safety net. If an unmarried participant never fills out the beneficiary form, the plan’s default rules apply, and those typically send the money to the estate rather than to the surviving partner.
The Narrow Exceptions
Common Law Marriage
Roughly ten states still recognize common law marriage, which can grant full spousal inheritance rights without a ceremony or license. A couple generally must show mutual intent to be married, consistent cohabitation, and a public reputation as a married couple. Shared bank accounts, joint tax filings, and using the same last name all help.
If a surviving partner proves a common law marriage in a state that recognizes one, they step into the full shoes of a legal spouse for inheritance purposes, including intestacy rights and the ability to claim an elective share. The burden of proof falls entirely on the survivor, and it is a heavy one, especially during grief. The deceased partner cannot confirm anything. Courts vary widely in how strictly they weigh the evidence. Relying on common law marriage as your inheritance plan means betting that a judge will later agree with your version of the relationship.
Registered Domestic Partnerships and Civil Unions
About a dozen states and the District of Columbia offer formal registration for domestic partnerships or civil unions. Where available, these statuses generally give the surviving partner the same inheritance rights as a legal spouse in that state, including intestacy rights and the elective share. Registration is usually a form, a fee, and sometimes a waiting period.
Two limits are worth knowing. Those rights may not follow you if you move to a state without a comparable registration system. And the IRS does not treat registered domestic partners as married for federal tax purposes unless they are legally married under state law, which matters for the next section.
Tax Penalties Even When You Do Inherit
Even when an unmarried partner successfully inherits through a will, joint tenancy, or beneficiary designation, the tax treatment is harsher than what a spouse would face.
The unlimited marital deduction exempts any amount of property passing to a surviving spouse from federal estate tax. It does not exist for unmarried partners. Property passing to you is a taxable transfer like any other non-spouse gift. For 2026, the individual federal estate tax exemption is $15,000,000, so estates below that owe no federal estate tax regardless of who inherits. Above it, the gap is dramatic: a married person can leave $50 million to their spouse tax-free, while an unmarried person leaving the same amount to a partner owes estate tax on every dollar above $15 million, at rates up to 40%.
Adding an unmarried partner to a real estate deed during your lifetime is treated as a gift by the IRS. If the interest you transfer exceeds the annual gift tax exclusion, which is $19,000 per recipient for 2026, you must file a gift tax return (Form 709). Married couples transfer property between themselves freely. The gift does not necessarily trigger an immediate tax bill, because the excess reduces your lifetime estate tax exemption, but it creates a filing obligation and eats into the exemption your estate will eventually use.
Federal Survivor Benefits You Can’t Claim
Federal survivor benefits are built around legal marriage. Cohabitation does not create eligibility, no matter how long it lasted.
Social Security survivor benefits are available only to a surviving spouse, an ex-spouse from a marriage of at least ten years, a dependent child, or a dependent parent. An unmarried partner of thirty years has no claim.
Federal employee retirement benefits work similarly. Under the Federal Employees Retirement System, monthly survivor annuities go to a current spouse, former spouse, or dependent child. An unmarried partner can receive benefits only through the “insurable interest” option, which the employee has to elect while alive and healthy and which reduces the retiree’s own annuity. Disability retirees cannot use the option at all. A separate lump-sum payment of remaining retirement contributions can go to anyone the employee names in a signed, witnessed beneficiary designation filed before death. Without that designation, the payment follows the standard priority order, starting with the spouse.
Funeral and Medical Authority
Exclusion goes beyond money. Most states follow a statutory priority list for funeral and burial decisions that starts with the spouse, then adult children, parents, and siblings. An unmarried partner who shared every meal with the deceased for twenty years may have no legal standing to decide whether their partner is buried or cremated.
Medical decisions follow the same pattern. If your partner becomes incapacitated and has not signed a healthcare power of attorney naming you as their agent, their biological relatives make the calls, and they may or may not respect your input. A few states include “domestic partner” in the default hierarchy, but usually below the spouse and immediate family. A healthcare directive and durable power of attorney signed while both partners are healthy fix this. They cost little and are routinely neglected.
If Nothing Was Planned: Legal Claims as a Last Resort
When a surviving partner has no legal status, no joint ownership, and no beneficiary designation to lean on, litigation may be the only option left. These claims are expensive, slow, and uncertain.
A surviving partner who made direct financial contributions to the deceased’s property, such as mortgage payments, renovation costs, or property taxes, can file a creditor’s claim against the estate for reimbursement. Courts may apply unjust enrichment or quantum meruit, which is compensation for the reasonable value of money or services contributed, to order repayment. This does not give you an ownership stake. It gives you a dollar figure for what you put in.
Some jurisdictions allow “Marvin claims,” which are lawsuits based on an express or implied agreement between partners to share assets or provide support. The claim requires evidence that an actual agreement existed, whether spoken or written. Proving it without written documentation is a steep climb. Judges want receipts, correspondence, or witness testimony.
Shared household items like furniture, electronics, artwork, and pets become their own fight. If an item is titled solely in the deceased partner’s name or has no title at all, the estate’s administrator may treat it as estate property. Your options are limited to proving you purchased it, that it was a gift to you, or that both partners agreed in writing to joint ownership. Without that evidence, the administrator has no legal basis to hand it over.
What to Do Now to Protect Each Other
Almost every disadvantage described above can be eliminated or reduced with advance planning. The tools are not complicated, and most do not require a lawyer, though working with one is usually worthwhile.
- Write a will. This is the single most important step. A valid will lets you leave specific property to your partner and name them as executor. Without one, intestacy controls everything in your probate estate.
- Set up a revocable living trust. Property held in a trust passes to the beneficiary privately, outside of probate, avoiding the delays, costs, and public record of probate court. You keep full control during your lifetime.
- Update every beneficiary designation. Check your 401(k), IRA, life insurance policies, and bank accounts, and name your partner as the primary beneficiary on each. These designations override a will, so outdated forms from a prior relationship can undo your intentions.
- Title real estate as joint tenants with right of survivorship. Confirm the deed says exactly that, not “tenants in common.” The wording decides whether the property passes automatically or goes through probate.
- Sign a healthcare power of attorney. This gives your partner legal authority to make medical decisions if you are incapacitated. Without it, that authority defaults to your biological family.
- Sign a durable power of attorney for finances. This lets your partner manage bills, access accounts, and handle financial matters if you cannot, which matters most when household expenses run through accounts in only one name.
- Execute a healthcare directive, sometimes called a living will, so your partner and your medical team know your wishes for end-of-life care.
- Sign a written designation of the person authorized to handle your funeral and remains, where your state allows it. Without it, the statutory next-of-kin list controls.
The cost of these documents is modest next to the cost of litigation, a lost inheritance, or a partner locked out of a hospital room. For unmarried couples, these steps are the difference between your partner inheriting what you intended and the legal system treating them like a stranger.