A common law marriage is a legally recognized marriage formed without a license or ceremony, available in only about a dozen U.S. jurisdictions and requiring far more than simply living together. Where it exists, it carries the same legal weight as a marriage performed by a judge or officiant, affecting inheritance, taxes, medical decisions, and federal benefits identically. Everywhere else, no amount of shared time or shared finances produces a marriage in the eyes of the law.
What Actually Creates a Common Law Marriage
Every state that recognizes these unions requires the couple to make a present, mutual agreement to be married. A plan to marry someday does not count. The agreement has to reflect an immediate, permanent commitment, one that can only be ended by death, divorce, or annulment.1Social Security Administration. GN 00305.060 Common-Law Marriage — General
On top of that agreement, courts typically look for five elements when deciding whether a valid common law marriage exists:2U.S. Department of Labor. Common-Law Marriage Handbook
- Legal capacity: both partners old enough to marry and free from any existing marriage.
- Mutual agreement: both intend a present, permanent marital relationship.
- Cohabitation: the couple lives together continuously as spouses.
- Holding out: the couple openly presents itself to the community as married.
- Reputation: people who know the couple generally regard them as married.
Holding out is usually what separates a long relationship from a marriage. Filing joint tax returns, sharing a last name, listing a partner as a spouse on insurance, signing a lease or mortgage as a married couple, and introducing each other as husband or wife all count as evidence. No single act is required, but the overall picture has to show two people who have publicly integrated their lives as spouses.
The Seven-Year Myth
One of the most stubborn misconceptions in family law is that living together for seven years automatically creates a common law marriage. No state has ever had that rule. The length of cohabitation is at most one piece of evidence, and it matters far less than whether the couple actually agreed to be married and presented themselves that way. Couples who share a home for decades in a non-recognizing state are, legally, not married at all, no matter how tangled their finances become.
The myth cuts both ways. Some people assume they have spousal rights they don’t have, and only find out when a partner dies or ends up in the hospital. Others avoid getting a license because they think they’re already covered. If you live in a recognizing state and want the marriage, the agreement and public representation matter far more than the calendar.
Where Common Law Marriage Is Recognized
Only a small number of jurisdictions currently allow couples to form new common law marriages: Colorado, Iowa, Kansas, Montana, Oklahoma, Rhode Island, Texas, and the District of Columbia. Utah works differently, requiring couples to petition a court for a judicial order recognizing the relationship as a marriage. New Hampshire recognizes common law unions only for inheritance purposes when one partner has died.3National Conference of State Legislatures. Common Law Marriage by State
Several states abolished common law marriage but still honor unions that formed before the cutoff date. Alabama, Georgia, Idaho, Ohio, Pennsylvania, and South Carolina fall into this group, with South Carolina’s change coming from a 2019 state supreme court decision. In each, a couple has to show the marriage began before the state’s specific cutoff.3National Conference of State Legislatures. Common Law Marriage by State
Every other state does not recognize common law marriage at all. In those states, a couple has no path to a legal marriage without a license and ceremony.
What Rights a Common Law Marriage Gives You
A valid common law marriage carries every legal right of a ceremonial marriage. Courts, agencies, and employers treat the two the same once the marriage is established.
Inheritance and Property
If one partner dies without a will, the surviving common law spouse inherits under the state’s intestate succession laws like any other surviving spouse. The exact share depends on the state and on whether the deceased had children or surviving parents, but a spouse is always near the front of the line. Without a recognized marriage, a surviving partner may have no claim at all to assets held solely in the deceased’s name.
Taxes
Common law spouses can file joint federal income tax returns. The IRS determines marital status based on whether the couple is married under the laws of the state where the marriage was formed.4Internal Revenue Service. Revenue Ruling 2013-17
Medical Decisions
Hospitals treat a recognized spouse as next of kin, allowing the partner to give informed consent for treatment if the other is incapacitated. Without the legal marriage, a long-term partner can be shut out entirely, especially if the patient’s biological family objects.
Social Security
A common law spouse may qualify for Social Security survivor benefits, spousal benefits during the worker’s lifetime, and other dependent benefits. The agency evaluates the marriage under the laws of the state where the worker was domiciled when the application is filed, or at the time of death for survivor claims.5Social Security Administration. SSR 61-9 Validity of Common-law Marriage Where Parties Intend Ceremonial Marriage in Future
FMLA Leave
Federal regulations define “spouse” under the Family and Medical Leave Act to include a partner in a common law marriage entered into in a state that recognizes such marriages, and the definition also covers same-sex common law marriages. The regulation looks at where the marriage was entered into, not where the employee currently works or lives, so a couple who formed a valid common law marriage in one state keeps FMLA spousal protection after moving to a state that does not recognize it.6eCFR. 29 CFR 825.122
Immigration
USCIS may treat a common law marriage as valid for immigration purposes if it was valid where it was formed, evaluating each case on the facts and expecting affidavits, joint tax returns, shared mortgages or leases, and other evidence of a marital partnership. USCIS also considers whether the state where the couple lives or intends to live recognizes common law marriages from other jurisdictions, which can complicate a petition.7USCIS. Chapter 6 – Spouses
Children
Children born during a valid common law marriage have the same legal standing as children born during a ceremonial one. The partner married to the mother at the time of birth is presumed to be the child’s legal parent, so the father’s name can go on the birth certificate, custody rights exist automatically, and the child can inherit from both parents without a separate paternity action. If the marriage itself is later disputed, that presumption can unravel and paternity may need to be established in court.
What Happens If You Move to Another State
The general rule is that a marriage validly formed in one state will be recognized in another, an idea that draws from the Full Faith and Credit Clause in Article IV of the U.S. Constitution.8Constitution Annotated. ArtIV.S1.1 Overview of Full Faith and Credit Clause Most states do honor out-of-state common law marriages, but the situation is not as airtight as it is for ceremonial ones. Some states have declined to recognize a common law marriage formed elsewhere, particularly when one partner was domiciled in the non-recognizing state at the time.
Federal agencies handle the question more cleanly. FMLA looks only at where the marriage was formed.6eCFR. 29 CFR 825.122 Social Security evaluates the marriage under the laws of the worker’s domicile at the time of the claim.1Social Security Administration. GN 00305.060 Common-Law Marriage — General For federal benefits, the key question is usually whether the marriage was valid where and when it was formed. If you are planning a move and want certainty, getting a license and ceremony before you go eliminates the ambiguity.
How to Prove the Marriage Exists
There is no marriage certificate, so proving a common law marriage means assembling documents and witness statements. If a partner denies it, or a government agency questions it, the burden falls on the person claiming the marriage.
The Social Security Administration, which handles these questions often, prefers signed statements from both spouses plus two blood relatives, with adjusted requirements when one or both spouses have died. Each statement should explain why the signer believes the marriage existed.9Social Security Administration. 20 CFR 404.726 – Evidence of Common-Law Marriage Documentary evidence adds weight: joint tax returns, shared bank accounts, insurance policies naming a spouse, mortgage documents signed as a married couple, religious marriage certificates, and government forms listing a spousal relationship. The more consistent the record, the easier the claim. Contradictions don’t automatically sink it, but they do invite closer review.2U.S. Department of Labor. Common-Law Marriage Handbook
If you’re in one of these marriages, document it as though you may need to prove it, because at some point you probably will.
Ending a Common Law Marriage
There is no such thing as a common law divorce. Because the marriage is legally identical to a ceremonial one, ending it requires a formal divorce in court. Moving apart, dating other people, or agreeing the relationship is over does nothing. Until a judge signs a decree, both partners remain married and cannot remarry.
The divorce works the same way as any other. One spouse files a petition in family court, and the court oversees the division of marital property and debts, addresses custody and support if there are children, and can order alimony. The extra step, if the other partner disputes it, is proving the marriage existed in the first place. People who drifted apart years ago sometimes discover they are still legally married when they try to remarry or apply for benefits. If your relationship met the standard in a recognizing state, assume you need a divorce to end it cleanly.
How to Avoid an Unintended Common Law Marriage
Long-term couples in recognizing states who don’t want to be married should be deliberate about it. A written cohabitation agreement stating that neither party considers the relationship a marriage is the most effective tool. It should be signed, dated, and ideally notarized.
Day-to-day behavior matters just as much. Refer to each other as partner rather than husband or wife. File taxes as single individuals. Do not list a partner as a spouse on insurance forms, loan applications, or government paperwork. These choices prevent the buildup of evidence that a court could read as holding out. A cohabitation agreement can also cover how expenses are split, who owns what, and what happens to jointly purchased property if the relationship ends, which spares both people a messy separation even without any marriage claim.