New York does not recognize common law marriage created inside the state, but it does honor a common law marriage that was validly formed in a state that allows one. That distinction is the whole answer, and it controls everything else: inheritance, healthcare authority, taxes, and whether you would need a divorce to walk away.
Why You Can’t Form a Common Law Marriage in New York
New York abolished common law marriage on April 29, 1933. Since then, Domestic Relations Law Section 11 has required every marriage performed in the state to be solemnized by an authorized officiant, such as a member of the clergy, a judge, or a city clerk, with a marriage license obtained beforehand.1New York State Senate. New York Domestic Relations Law 11 – Marriage, How Solemnized
Time and appearances don’t substitute. You could live with a partner in New York for fifty years, share every bank account, raise children together, and introduce each other as spouses at every event, and the state would still treat you as unmarried. The only route to a New York marriage is a license plus a ceremony.
The Out-of-State Exception
Under the Full Faith and Credit Clause of the U.S. Constitution, states generally must honor legal relationships established in other states.2Cornell Law School. Full Faith and Credit So if you and your partner met the requirements for common law marriage while living somewhere that permits one, New York treats your union as valid when you move here. Your marriage carries the same legal weight as any licensed New York marriage.
Recognition turns entirely on the law of the state where you claim the marriage was formed. A New York court does not apply New York’s marriage rules to your relationship. It looks at whether you satisfied the other state’s requirements during the time you lived there.
Where Common Law Marriages Can Still Be Created
Only a handful of jurisdictions still allow new common law marriages. As of 2026, the list includes Colorado, Iowa, Kansas, Montana, Texas, and Utah, along with the District of Columbia. Rhode Island and Oklahoma recognize them through case law rather than statute. New Hampshire occupies an unusual middle ground: it treats cohabiting couples as legally married only for inheritance purposes after one partner dies.
Several other states abolished common law marriage but still honor unions formed before their cutoff dates. Alabama’s cutoff is January 1, 2017. Pennsylvania’s is January 1, 2005. Georgia’s is January 1, 1997. Ohio’s is October 10, 1991. A common law marriage entered before the applicable date remains valid, and New York should recognize it.
Requirements vary by state, but most share the same core: both partners must have the legal capacity to marry, must agree in the present tense to be married, must live together, and must hold themselves out publicly as a married couple. Cohabitation by itself never suffices.
Proving an Out-of-State Common Law Marriage in a New York Court
Claiming a common law marriage and proving one are different problems. New York courts require clear and convincing evidence that a valid marriage was formed under the other state’s law.3U.S. Department of Justice. Common-Law Marriage – Proof Required Under New York Law That standard sits above the ordinary “more likely than not” threshold used in most civil disputes.
The strongest evidence is documentary. Joint federal tax returns filed as married, shared bank accounts, deeds listing both partners, insurance policies naming a partner as spouse, and a shared last name all carry weight. Testimony from family, neighbors, and coworkers about the couple’s reputation as married partners supplements the paper record but rarely carries the case on its own.
The burden falls on the person asserting the marriage. If you are seeking spousal inheritance rights, healthcare decision-making authority, or equitable distribution of property, you need to arrive with documentation. Gather it well before you need it. After a partner dies or the relationship ends, proof becomes much harder to assemble.
What a Recognized Common Law Marriage Gives You
Once New York recognizes your marriage, you hold every right that any other spouse holds. There is no lesser tier for common law spouses.
Inheritance
A recognized spouse has an elective share of the deceased partner’s estate that protects against disinheritance, regardless of what the will says.4New York State Senate. New York Estates, Powers and Trusts Law 5-1.1 – Right of Election by Surviving Spouse If the partner dies without a will, the surviving spouse takes under New York’s intestacy statute; without recognition, an unmarried partner inherits nothing.5New York State Senate. New York Estates, Powers and Trusts Law 4-1.1 – Descent and Distribution of a Decedents Estate
Healthcare Decisions
New York gives a spouse priority in surrogate medical decision-making, sitting near the top of the hierarchy just below a court-appointed guardian.6New York State Senate. New York Public Health Law 2965 – Surrogate Decision-Making Without recognition, an unmarried partner can be shut out of medical decisions entirely, with authority passing instead to parents, siblings, or adult children.
Divorce Is Required to End It
A recognized common law marriage is a real marriage, which means it can only end through a real divorce. Moving apart or mutually agreeing the relationship is over does not dissolve anything. You need a formal divorce proceeding, with equitable distribution of marital property and the possibility of spousal maintenance. Skipping that step leaves both partners legally married, which creates problems for taxes, new relationships, benefits, and future estates.
Federal Taxes and Social Security
The IRS follows state law on marital status. Under Revenue Ruling 58-66, a couple in a valid common law marriage is treated as married for federal income tax purposes.7Internal Revenue Service. Revenue Ruling 2013-17 That means you must file as Married Filing Jointly or Married Filing Separately, based on your status on the last day of the tax year.8Internal Revenue Service. Filing Status The obligation to file as married applies whether or not you hold a certificate.
The Social Security Administration also recognizes common law marriages for spousal and survivor benefits, evaluating marital status under the law of the state where the insured person lived when the application was filed.9Social Security Administration. SSR 61-9 – Validity of Common-Law Marriage The SSA verifies the marriage through statements from both spouses (Form SSA-754), corroborating statements from relatives or others familiar with the relationship (Form SSA-753), and supporting documents such as mortgage records, insurance policies, and medical records.10Social Security Administration. Development of Common-Law (Non-Ceremonial) Marriages Assembling this evidence while both spouses are living is far easier than assembling it after one has died.
If You Have No Recognizable Common Law Marriage
If you have lived together in New York without a ceremony, or your common law marriage claim can’t be proven, New York offers almost no automatic property protections. This catches long-term couples off guard.
New York courts have held that no contract will be implied from the fact that two people lived together and shared a household. Contributing to a home for years, even a decade of mortgage payments, does not create a legal claim to your partner’s equity, retirement accounts, or other assets. A partner who left the workforce to raise children has no right to spousal support. If the partner dies without a will, the survivor inherits nothing.
An express written agreement between unmarried partners, however, is enforceable under standard contract principles, provided it is not based solely on a sexual relationship. The line between implied and express is the whole game: if it isn’t in writing, New York courts are unlikely to help you divide anything.
What Unmarried Couples Can Do Instead
Couples who don’t marry still have real options, but each requires deliberate action.
Cohabitation Agreement
A cohabitation agreement is a written contract that spells out how property, debts, expenses, and assets are handled during the relationship and if it ends. New York enforces these like any other contract: entered voluntarily, with full financial disclosure, for a lawful purpose. Because courts will not imply a property-sharing arrangement from cohabitation alone, this document is the single most important protective step an unmarried couple in New York can take.
Healthcare Proxy and Power of Attorney
Any competent adult in New York can name any other adult as their healthcare agent through a healthcare proxy; marriage is not required.11New York State Senate. New York Public Health Law 2981 – Health Care Proxy A durable power of attorney does the same job for financial decisions during incapacity. Without these documents, your partner has no legal standing to act for you.
Domestic Partnership Registration
New York City allows couples to register as domestic partners through the Office of the City Clerk.12Office of the City Clerk – New York City. Domestic Partnership Registration Both partners must be at least 18, not currently married or in another domestic partnership, and not related in a way that would bar marriage; at least one must be a New York City resident or a city employee. Registration provides access to some benefits, including health insurance through a partner’s city employment and hospital visitation. Other municipalities offer similar registrations. Domestic partnership is not marriage and does not convey the full range of state or federal spousal rights.