A de facto relationship is a committed partnership in which two people live together and share their lives in the way a married couple would, without ever marrying. In most of the United States, that arrangement by itself gives you almost none of the legal protections marriage grants automatically. What you actually get depends on your state, on whether your partnership meets a specific legal category, and above all on what the two of you have put in writing.
How Courts Decide a Relationship Is De Facto
No single factor settles it. When a court has to decide whether two people were in a genuine domestic partnership, it looks at the full picture of how the couple lived. Length of cohabitation matters. So does whether partners shared finances, maintained a sexual relationship, presented themselves publicly as a couple, and supported each other emotionally and practically. Jointly titled property, shared bank accounts, and mutual financial dependence all point toward a recognized partnership.
Courts also weigh whether the couple raised children together, divided household responsibilities, and made joint decisions about their lives. There’s no checklist that guarantees recognition. The overall pattern is what matters. Two people who lived together for a decade, raised children, and merged their finances look very different to a court than two roommates who split rent for a few years.
Common Law Marriage: The Status That Actually Carries Rights
In the U.S., the legal concept closest to a recognized de facto relationship is common law marriage, and only about ten states and the District of Columbia currently allow a new one to form. Those states include Colorado, Iowa, Kansas, Montana, New Hampshire, South Carolina, Texas, and Utah, with Rhode Island and Oklahoma recognizing common law marriages through case law rather than statute.1National Conference of State Legislatures. Common Law Marriage by State Each state sets its own requirements, but the common elements are that both partners must be legally able to marry, must agree to be married, must live together, and must hold themselves out to the community as a married couple.
If you establish a valid common law marriage in one of those states, other states generally must recognize it under the Full Faith and Credit Clause, even states that won’t let a new one form inside their borders. If you live in a state that doesn’t recognize common law marriage and you never established one elsewhere, your long partnership gives you almost none of the legal protections married couples receive by default. A couple who has lived together for twenty years in a non-recognition state has fewer automatic rights than a couple married yesterday.
Registered Domestic Partnerships and Civil Unions
Some jurisdictions offer a middle path. New Jersey provides statewide domestic partnership rights, and Colorado recognizes civil unions at the state level. Beyond that, dozens of cities and counties maintain their own registries. The rights attached vary enormously. Some registries provide health insurance access, hospital visitation, and limited property protections. Others are largely symbolic. Read the specific ordinance or statute that governs your local registry before assuming registration gives you anything close to the full package of marriage.
Property Rights When You Split Up
This is where unmarried partners most often get blindsided. When a married couple divorces, courts divide property using statutory frameworks. When an unmarried couple splits, no equivalent system exists in most states. Property generally belongs to whoever holds title, regardless of who paid the mortgage, funded the renovation, or kept the household running.
If your partner’s name is the only one on the deed to a home you both paid for, you don’t automatically have a right to half. A few states, including Georgia, Illinois, and Louisiana, offer almost no legal claims for unmarried partners seeking property division. Most other states allow claims, but you have to prove them using legal theories that are harder to win and more expensive to litigate than a standard divorce. California’s 1976 Marvin decision established that unmarried partners can enforce written, spoken, or implied agreements about property and support, and that principle has influenced courts across the country. Proving an implied agreement years later, usually with faded memories and contradictory testimony, is a steep climb.
Jointly titled assets are simpler. If both names are on a bank account, deed, or vehicle title, both partners have a legal ownership interest. The practical rule: if you’re contributing to an asset during the relationship, get your name on the title or get the arrangement in writing.
Financial Support After a Breakup
Married couples going through divorce can seek alimony. Unmarried partners generally cannot, unless they can prove a common law marriage or they have a written agreement that addresses support. The concept sometimes called “palimony” isn’t a standard entitlement; it rests on whether the couple had an enforceable contract, and many states require that contract to be in writing.
One wrinkle: if you already receive alimony from a previous marriage and you begin cohabiting with a new partner, that new relationship can affect the existing alimony. Many states allow the paying ex-spouse to petition for a reduction or termination when the recipient enters a new cohabiting relationship, even without remarriage.
Children and Parental Rights
Parental rights do not depend on whether the parents were ever married. Both biological parents have rights and obligations toward their children regardless of relationship status. When unmarried parents separate, custody, visitation, and child support are decided under the child’s best interests standard, the same standard courts apply in divorce.2Legal Information Institute. Best Interests of the Child
The main difference is procedural. Married fathers are presumed to be the legal father of children born during the marriage. Unmarried fathers may need to establish paternity through a voluntary acknowledgment or a court order before they can assert custody or visitation rights. Once paternity is established, the framework is essentially the same as for divorcing parents, and child support obligations are calculated by state guidelines and cannot be waived by agreement between the parents.
Medical Decisions and Hospital Access
Without documentation, you may not be able to make medical decisions for your partner in an emergency. Most states have default surrogate decision-making hierarchies that prioritize spouses, adult children, and parents. An unmarried partner is typically not on that list. If your partner is incapacitated and you haven’t been designated as their healthcare agent, the hospital will turn to family instead.
Federal regulations do protect your right to visit. Hospitals participating in Medicare or Medicaid must inform patients of their right to designate visitors, explicitly including domestic partners, and cannot restrict visitation based on sexual orientation, gender identity, or relationship status.3eCFR. 42 CFR 482.13 Visitation and decision-making are two different things. Being allowed in the room doesn’t let you authorize a procedure or make end-of-life decisions.
To close the gap, both partners should execute a healthcare power of attorney (sometimes called an advance healthcare directive) naming each other. The agent can make decisions about treatments not covered in a separate declaration, choose providers, access medical records, and enforce your wishes in court. Some states require notarization. A directive created in one state may not be honored in another, so couples who travel or move frequently should check whether their documents will carry across state lines.
Inheritance and Retirement Accounts
If your partner dies without a will, you will almost certainly receive nothing. Every state’s intestacy laws (the rules that control who inherits with no will) prioritize spouses, children, parents, and siblings. Unmarried partners are not included in any state’s default inheritance hierarchy, regardless of how long you lived together. A partner of thirty years has less standing in most intestacy schemes than a distant cousin.
The only protection is deliberate planning. Your partner has to name you in a valid will. Even then, wills can be challenged by family, so a properly executed will drafted with an attorney reduces that risk. For assets that pass outside a will, including retirement accounts and life insurance, the beneficiary on file controls who receives the money.
Married spouses get automatic protection on retirement accounts under federal law. A spouse is the default beneficiary of a 401(k), and the account holder cannot name anyone else without the spouse’s written waiver. Unmarried partners get no such protection. If your partner has a 401(k) or pension and never updated the beneficiary form, those funds go to whoever is listed, which could be an ex-spouse, a parent, or a plan default. Plan administrators are required to follow the beneficiary on file even when it clearly doesn’t reflect what the account holder would have wanted. Life insurance works the same way: the policy pays the named beneficiary. Updating these designations is one of the simplest and most overlooked steps.
Taxes
Unmarried couples cannot file joint federal returns. Each partner files as single or, if they have a qualifying child or dependent relative, potentially as head of household. A domestic partner alone does not qualify as the “qualifying person” for head of household status.4Internal Revenue Service. Understanding Taxes – Filing Status
Under limited circumstances you can claim your partner as a dependent. Your partner must live with you the entire year, earn less than the annual exemption amount in gross income, receive more than half their support from you, and the relationship must not violate local law.5Office of the Law Revision Counsel. 26 USC 152 Dependent Defined If your partner qualifies, employer-provided health coverage for them won’t be treated as taxable imputed income.
When an employer offers health coverage to an employee’s domestic partner and the partner does not qualify as a tax dependent, the employer’s share of the premium for the partner is generally counted as taxable imputed income on your W-2, and your contributions for your partner’s coverage are made with after-tax dollars. For a spouse, both of those costs receive favorable pre-tax treatment.5Office of the Law Revision Counsel. 26 USC 152 Dependent Defined
Gift tax is another split. Married spouses can transfer unlimited amounts to each other without triggering gift tax. Unmarried partners cannot. In 2026, you can give up to $19,000 per year to your partner without filing a gift tax return.6Internal Revenue Service. Gifts and Inheritances 1 Anything above that must be reported on IRS Form 709, though you won’t owe actual gift tax until your cumulative reported gifts exceed the lifetime exclusion of $15,000,000.7Internal Revenue Service. Whats New – Estate and Gift Tax This matters when partners share expenses unevenly or when one contributes significantly more to a joint purchase.
Social Security and Other Federal Benefits
Social Security survivor benefits are available to spouses and, in limited cases, common-law spouses. If you live in a state that recognizes common law marriage and can prove your relationship meets the criteria, the Social Security Administration may treat you as a surviving spouse. If you live in a non-recognition state and never established one elsewhere, survivor benefits are simply unavailable, regardless of how long you were together.
The same limit runs through other federal programs. Veterans’ benefits, federal employee benefits, and immigration sponsorship define eligibility by legal marriage or, in some cases, recognized common law marriage. A de facto relationship alone, without one of those statuses, generally does not qualify.
What to Put in Writing
A cohabitation agreement is the single most effective tool for unmarried partners who want to protect their rights. It’s a written contract that can address property ownership, financial responsibilities during the relationship, and how assets and debts will be divided if the relationship ends. It can also include post-separation support.
To hold up in court, the agreement should be in writing and signed voluntarily by both partners. It cannot include illegal provisions, and it cannot restrict child support, which belongs to the child and is set by courts regardless of what the parents agreed. Courts in some states have refused to enforce agreements that appear to be based on an exchange of sexual services, so financial arrangements should be tied clearly to the economic partnership rather than the intimate relationship.
Beyond the cohabitation agreement itself, unmarried partners should put the following in place:
- A will naming your partner as a beneficiary. Intestacy laws exclude unmarried partners entirely.
- A healthcare power of attorney designating your partner to make medical decisions if you’re incapacitated.
- A financial power of attorney authorizing your partner to manage your finances during illness or absence.
- Updated beneficiary designations on retirement accounts, life insurance, and payable-on-death bank accounts.
- Joint property titling, with a written agreement on how ownership is divided, for any major asset you buy together.
Married couples receive most of these protections by default. Unmarried partners build them one document at a time. The cost of putting them in place is modest compared to what can go wrong when a crisis arrives and the legal system has nothing to work with.