A common law marriage starts the moment a couple with the legal capacity to marry simultaneously satisfies every element their state requires, typically a present-tense agreement to be married, living together as spouses, and publicly presenting themselves as a married couple. There is no waiting period, ceremony, or license, and the marriage is legally effective the instant all elements line up, not when any single one is first met.1Social Security Administration. POMS GN 00305.060 – Common-Law Marriage — General Only a handful of jurisdictions still allow new common law marriages to form, so where you live when the elements align matters as much as what you do.
Where a New Common Law Marriage Can Actually Begin
A common law marriage can only start in a jurisdiction that recognizes new ones. Those are Colorado, Iowa, Kansas, Montana, Rhode Island, South Carolina, and the District of Columbia. Texas allows couples to either register an informal marriage at the county clerk’s office or establish one by meeting a three-part test of agreement, cohabitation in Texas, and public representation as married. Utah recognizes unsolemnized marriages only after a court or administrative body issues an order confirming the relationship meets the state’s criteria. Oklahoma’s statute requires a marriage license, but state courts have continued to uphold common law marriages through case law, leaving its status uncertain.2National Conference of State Legislatures. Common Law Marriage by State
New Hampshire is a narrow exception. It recognizes a common law marriage only for probate purposes, when two people lived together and were generally known as married for at least three years and one of them has died. The surviving partner can then be treated as a spouse for settling the estate, but the recognition does not apply during both partners’ lifetimes.3Social Security Administration. POMS PR 05605.032 – New Hampshire
Several states abolished common law marriage but still honor unions formed before a cutoff date: Alabama before January 1, 2017; Georgia before January 1, 1997; Idaho before January 1, 1996; Ohio before October 10, 1991; and Pennsylvania before January 1, 2005. In those states, no new common law marriage can start today, but one that began before the cutoff remains valid.
If you live in any other state, no amount of time together will start a common law marriage. The seven-year rule you may have heard about is a myth. Living together for seven years, or seventy, does not create a marriage anywhere. In non-recognition states, the only path to legal marriage is a licensed, ceremonial one. A short visit to a recognition state will not fix this either. Colorado, Ohio, Oklahoma, and Texas, among others, have held that a brief stay by nonresidents is not enough to form a valid union.4Social Security Administration. POMS GN 00305.075 – State Laws on Validity of Common-Law Non-Ceremonial Marriages
Capacity Has to Exist First
Before the three elements can start the clock, both partners must have the legal capacity to marry. That means both are at least 18 in most jurisdictions, both are mentally competent to understand what marriage means, and critically, neither is already married to someone else.5Department of Labor. Common-Law Marriage Handbook
If one partner has a prior marriage that was never dissolved by divorce or annulment, any attempted common law marriage is void from the outset. The start date cannot predate the removal of that impediment. Once the earlier marriage ends, a valid common law marriage can begin going forward if the couple keeps living together and continues to meet the other requirements in a recognition state. Some states apply a “putative spouse” doctrine to protect the property and financial interests of a person who genuinely believed the marriage was valid when it was not.
The Three Elements That Have to Line Up
Each recognition state has its own wording, but three elements run through nearly all of them. The marriage begins the instant all three exist together.1Social Security Administration. POMS GN 00305.060 – Common-Law Marriage — General
A Present-Tense Agreement to Be Married
Both partners must mutually agree to be married now, not later. A promise to marry at some future point, such as an engagement, does not qualify. The agreement must contemplate a permanent, exclusive union that can only end the way any other marriage ends: by death, divorce, or annulment.1Social Security Administration. POMS GN 00305.060 – Common-Law Marriage — General The agreement does not have to be written, but written evidence makes the start date far easier to establish later.
Living Together as Spouses
The couple must cohabit as spouses. Sharing an address is not enough on its own. The arrangement has to reflect the mutual rights and responsibilities of marriage rather than a roommate situation or a casual relationship.5Department of Labor. Common-Law Marriage Handbook No recognition state sets a minimum number of months or years. New Hampshire’s three-year requirement is the one exception, and it applies only to that state’s narrow probate recognition after a partner’s death.3Social Security Administration. POMS PR 05605.032 – New Hampshire
Holding Out as Married
Both partners must present themselves to their community as married. Friends, family, neighbors, coworkers, and institutions all need to understand the relationship that way. Common forms this takes:
- One partner adopts the other’s surname, or both use a hyphenated name.
- Each refers to the other as “my husband” or “my wife” in social and professional settings.
- Joint bank accounts, mortgages, or credit cards held as a married couple.
- Each partner listed as spouse on health insurance, life insurance, or retirement beneficiary forms.
- Federal tax returns filed as Married Filing Jointly or Married Filing Separately.
Keeping separate last names can weigh against a claim of common law marriage because it cuts against the public-representation element.5Department of Labor. Common-Law Marriage Handbook The more consistently a couple presents as married across different areas of life, the stronger the case that a common law marriage exists and the easier it becomes to point to when it started.
Why the Start Date Matters
Because there is no certificate issued at the moment of formation, the start date can become contested years later, and it drives real financial outcomes.
For Social Security, a divorced spouse can collect benefits based on an ex-spouse’s earnings record only if the marriage lasted at least ten years before the divorce became final.6Office of the Law Revision Counsel. 42 USC 402 – Old-Age and Survivors Insurance Benefit Payments With no wedding date on a certificate, meeting that threshold depends on pinpointing when the three elements first lined up. The Social Security Administration accepts common law marriages that are valid under the law of the state where the couple lived when benefits were applied for, or where they lived when a partner died.1Social Security Administration. POMS GN 00305.060 – Common-Law Marriage — General
For federal taxes, the IRS recognizes common law marriages that are valid under state law. Marital status on December 31 sets your filing status for the whole tax year, and a valid common law spouse must file as Married Filing Jointly or Married Filing Separately rather than single.7Taxpayer Advocate Service. The Tax Ramifications of Tying the Knot If you later realize your common law marriage started in an earlier tax year and you filed as single, you can amend using the correct status, with all items affected by marital status adjusted consistently.8Internal Revenue Service. Revenue Ruling 2013-17 The standard three-year statute of limitations on amended returns still applies.
For immigration, USCIS treats a common law marriage as valid for visa and green card petitions if it is valid where formed, and it looks at affidavits, joint tax returns, mortgages, and joint utility bills as evidence of a marital partnership.9U.S. Citizenship and Immigration Services. USCIS Policy Manual – Volume 6, Part B, Chapter 6 – Spouses
For inheritance, a valid common law spouse has the same rights as a ceremonially married one, including a statutory intestate share and standing to bring a wrongful death claim. The problem is that proof has to come after the partner can no longer confirm the relationship. Without a documented start date and supporting records, a probate court may conclude no marriage existed, leaving the surviving partner with no spousal rights.
Fixing the Start Date in Writing
Because the marriage forms silently, the time to document when it started is while both partners are alive and in agreement. If the marriage is later challenged in a divorce, benefits claim, or probate dispute, the person asserting the marriage carries the burden of proof, which can be a preponderance of the evidence or the higher clear and convincing standard depending on the state.5Department of Labor. Common-Law Marriage Handbook
Useful records include joint tax returns, deeds listing both partners, shared bank or loan statements, insurance policies naming a partner as spouse, and mail addressed to both of you at the same address. Sworn written statements from friends and family who understood you as married also carry weight. For Social Security purposes, both partners (or the surviving partner plus relatives of the deceased) complete Form SSA-754, Statement of Marital Relationship, which asks when the couple began living together, how they introduced each other, whether they filed joint tax returns, and whether they opened joint accounts. The agency may contact employers, neighbors, and relatives listed on the form to verify.10Social Security Administration. SSA Handbook 1717 – Evidence of Common-Law Marriage
A short written statement signed and dated by both partners, confirming the present-tense agreement to be married as of a specific date, is one of the cleanest ways to lock in a start date. Paired with contemporaneous records showing cohabitation and public representation from that date forward, it answers the question the law actually asks: on what day did all three elements first exist at once.