No state requires a specific number of years of living together to create a common law marriage, so the honest answer to how long you have to live together for common law marriage is that duration alone never triggers one. The widely repeated “seven years” rule does not exist in any state’s law. A common law marriage forms when a couple agrees to be married right now, holds themselves out publicly as spouses, and lives together while legally free to marry. That can happen in months, or it can fail to happen after decades under the same roof.
The Seven-Year Rule Is a Myth
People state it with confidence. It is still wrong. No statute in any state that recognizes common law marriage sets a minimum cohabitation period, and courts do not count years to decide whether a marriage exists. They look at the whole relationship.1Department of Labor. Common-Law Marriage Handbook
Length of cohabitation is evidence, and a longer shared history strengthens the case. But two people can share a home for twenty years without being common law married if they never agreed to be spouses and never presented themselves that way. A different couple who clearly agrees to be married, introduces each other as husband and wife, and moves in together can meet the test within a much shorter span. Time supports the story; it does not write it.
What Actually Creates a Common Law Marriage
The elements vary a little by state, but the core test is consistent. All of these must be true at the same time.
- A present agreement to be married. Both partners have to genuinely intend to be married to each other now. Plans to marry someday do not count. The agreement does not need to be in writing, but it has to be mutual and present-tense.
- Holding out as spouses. The couple must present themselves publicly as married: introducing each other as husband, wife, or spouse, and often sharing a last name, wearing rings, or listing each other as a spouse on insurance and benefits paperwork.
- Cohabitation. Living together is required. No minimum length, but a shared household as a couple is part of the picture.
- Legal capacity. Both people must be old enough to marry (generally 18, with some states allowing younger with consent), mentally competent, and not already married to someone else.1Department of Labor. Common-Law Marriage Handbook
The capacity requirement catches more couples than expected. If one partner is still legally married to somebody else, no common law marriage can form until that prior marriage ends. In several states, once it does, a valid common law marriage can then be established going forward if the couple keeps living as spouses.2Social Security Administration. State Laws on Validity of Common-Law Non-Ceremonial Marriages
Where Common Law Marriage Is Still Possible
Most states no longer allow new common law marriages. The jurisdictions that currently do are Colorado, Iowa, Kansas, Montana, Oklahoma, Rhode Island, Texas, Utah, and the District of Columbia. New Hampshire recognizes common law marriage only for inheritance after one partner has died.3National Conference of State Legislatures. Common Law Marriage by State
If you live somewhere else, you generally cannot create a new common law marriage no matter how long you cohabit. There is an important exception in the other direction: a common law marriage validly formed in a state that allows it is recognized in every other state under the Full Faith and Credit Clause. A couple who becomes common law married in Colorado stays married after moving to California.
Grandfathered Marriages in Former Common Law States
Several states abolished common law marriage but still honor unions formed before a cutoff. A marriage that met the requirements in one of these states before the date below remains valid today:
- South Carolina: before July 24, 2019
- Alabama: before January 1, 20174Alabama Legislature. Alabama Code 30-1-20 – Common-Law Marriage Abolished
- Pennsylvania: before January 1, 2005
- Georgia: before January 1, 1997
- Idaho: before January 1, 1996
- Ohio: before October 10, 1991
- Florida: before January 1, 1968
- Indiana: before January 1, 1958
Texas and Utah Attach Their Own Deadlines
Two states do put a clock on the process, but not the one people usually ask about. Texas calls its version an informal marriage. A couple can either sign a declaration of informal marriage with the county clerk or later prove the marriage through evidence of an agreement, cohabitation in Texas, and public representation as spouses. If the couple separates and no legal proceeding is filed within two years, Texas law presumes no marriage agreement ever existed. That presumption can be rebutted, but the burden becomes much heavier.5State of Texas. Texas Family Code 2.401 – Proof of Informal Marriage
Utah does not recognize common law marriage by default at all. You have to petition a court or administrative body for an order establishing that an unsolemnized marriage exists, and the petition must be filed during the relationship or within one year after it ends. The court then evaluates legal age, capacity, cohabitation, assumption of marital rights and duties, and public representation as spouses.6Utah Legislature. Utah Code 81-2-408 – Validity of Marriage Not Solemnized Miss the one-year window and recognition is off the table.7Utah Courts. Judicial Recognition of a Relationship as a Marriage
Why the Answer Matters
A valid common law marriage carries the full legal weight of a ceremonial one, at the state level and the federal level.
The IRS treats you as married once your common law marriage is valid in the state where it formed, and you must file using a married status (jointly or separately). Filing as single is not an option, and this stays true even after moving to a state that does not permit new common law marriages.8Internal Revenue Service. Revenue Ruling 2013-17
The Social Security Administration likewise recognizes valid common law marriages when it decides spousal and survivor benefits. A common law spouse can claim survivor benefits on the same footing as a widow or widower from a ceremonial marriage.9Social Security Administration. Code of Federal Regulations 404.726 – Evidence of Common-Law Marriage Recognized common law spouses also get the default authority spouses have for medical decisions when a partner is incapacitated, and they inherit under state intestacy rules if a partner dies without a will. Couples who assume they are common law married but never actually met the elements have none of these protections.
Proving It When Someone Asks
Because there is no marriage certificate, proof depends on the paper trail and on people who know you. The burden is on the person claiming the marriage exists, and the issue usually surfaces in divorce, benefits claims, or inheritance disputes.1Department of Labor. Common-Law Marriage Handbook
Documentary evidence typically includes:
- Joint federal or state tax returns filed as a married couple
- Joint bank accounts, mortgage documents, or deeds in both names
- Insurance policies, employer benefit enrollments, or pension beneficiary forms naming a partner as a spouse
- Leases or other records tying both partners to the same address
Testimony fills in the rest. Friends, family, coworkers, and neighbors can confirm that the couple presented themselves as married. For Social Security claims, the agency prefers signed statements from blood relatives of the deceased spouse.9Social Security Administration. Code of Federal Regulations 404.726 – Evidence of Common-Law Marriage A single document rarely does the job on its own; agencies and courts want to see a consistent pattern.
Ending It Takes a Divorce
One point catches people off guard: because a common law marriage has the same legal status as a ceremonial one, ending it requires a formal divorce. Moving out does not do it. There is no cohabitation clock that runs the other way to dissolve the marriage. Property, debts, spousal support, and any custody questions go through court just as they would for any other divorce, with the added step of proving the marriage in the first place if it is contested. Remarrying without that divorce is bigamy, even though the earlier marriage never had a wedding.