Common Law Marriage in California

When you share a home, finances, and a life with someone, it can feel like marriage in every meaningful way. But in California, feelings don't create legal rights. The state requires a license and a ceremony. That means millions of cohabiting couples have far fewer legal protections than they realize, and learning that the hard way, during a breakup or after a death, can be devastating.

What is a common law marriage?

A common law marriage is a legally recognized union created without a marriage license or formal ceremony. Instead of going through the traditional process, couples become legally married through their conduct: living together, holding themselves out publicly as spouses, and agreeing to be married. The concept has roots in English common law and survives in a small number of U.S. states today.

People in common law marriages typically share finances, own property together, and may have children. What they lack is a marriage certificate. That absence matters enormously when relationships end or one partner dies, because it can eliminate automatic legal protections that married couples take for granted.

As of 2025, only nine states and Washington D.C. recognize new common law marriages. These are Colorado, Iowa, Kansas, Montana, New Hampshire, South Carolina, Texas, Utah, and Washington D.C. Each has its own rules, but most require that both partners be legally eligible to marry, that they live together, and that they present themselves publicly as a married couple. Some states have eliminated common law marriage entirely but still recognize marriages validly created there before a specific cutoff date.

Notably, there is no universal "seven-year rule." The idea that living together for a certain number of years automatically creates a marriage is a myth in every state. Requirements vary, and some states set no minimum cohabitation period at all.

Common law marriage in California

California abolished common law marriage in 1895. Since then, the only way to become legally married in this state is to obtain a marriage license from a county clerk and hold a ceremony with a licensed officiant. Cohabitating for any length of time, sharing bank accounts, buying a home together, or having children does not change that. See California divorce laws for a broader overview of how the state defines and governs marriage.

There is one narrow exception. If you and your partner established a valid common law marriage in a state that recognized it at the time, and you then moved to California, California will generally honor that marriage as valid. This follows the U.S. Constitution's Full Faith and Credit Clause, which requires states to respect the legal judgments of other states.

Keep in mind that proving an out-of-state common law marriage can be difficult because there is no marriage certificate. Courts may ask for evidence that you met the other state's requirements: proof of cohabitation, joint financial records, evidence that you presented yourselves publicly as spouses. Some couples find it easier to simply get married in California after relocating.

Rights of unmarried couples in California

Without a legal marriage, California treats each partner as a single individual with separate property, separate finances, and separate legal obligations. This has real consequences when a relationship ends. Here is how the law treats four key areas.

Finances and bank accounts

Each partner owns 100% of any asset in their name alone. If you opened a joint bank account together, those funds are split equally. But if only one partner's name is on an account or asset, proving any ownership claim without formal documentation is very hard. Keeping detailed records of contributions matters.

Property

California's community property rules apply only to married couples and registered domestic partners. For everyone else, property belongs to whoever holds title. If both partners are on a deed or car title, they split that asset equally when they separate. If only one name appears, the other partner must go to court to prove any ownership interest, which requires receipts, bank records, and other documentation. For more detail on how property is handled in California separations, see our guide to property and debt division in California.

Spousal support

Unmarried partners are not automatically entitled to support after a breakup. California courts do not have general authority to award alimony to people who were never legally married. A Marvin claim (discussed below) is the primary path for pursuing support, but it is a civil lawsuit, not a family law proceeding, and it is difficult to win.

Child custody and support

Child support and custody are available to unmarried parents, but parentage must first be legally established. California courts ask unmarried parents to go through a formal parentage process, either through the courts or through a voluntary declaration of parentage, before either parent can request custody, visitation, or child support orders. Once parentage is established, the same rules that apply to divorcing parents apply here. For more information, see our overview of California child custody laws.

Marvin claims: what they are and how they work

In 1976, the California Supreme Court decided a landmark case involving actor Lee Marvin and his former partner, Michelle Triola. Triola had given up her career to support Marvin's, and when the relationship ended, she sought financial support. The court ruled that while she could not prove a contract existed in her specific case, unmarried couples in California can enforce express or implied agreements about property and financial support. That ruling created what we now call a Marvin claim or, colloquially, a palimony claim.

A Marvin claim is a civil lawsuit, not a family court matter. To succeed, you need to demonstrate that an agreement existed between you and your partner, whether it was written, oral, or implied through the way you both conducted your lives. Courts look at factors including how long you lived together, how financially intertwined you were, what sacrifices either partner made (such as leaving a career to raise children or support the other's professional growth), and what documentation exists of any understanding about shared finances or future support.

These cases are genuinely difficult to win. Proving an oral or implied contract to a court's satisfaction requires substantial evidence: financial records, communications, witness testimony, and documentation of how you lived. California courts in 2024 and 2025 have continued to require clear, credible evidence of an actual agreement, not just a long or emotionally close relationship.

Importantly, Marvin claims apply equally to all unmarried couples regardless of gender or sexual orientation. If you are considering pursuing or defending one, working with a family law attorney is essential. The stronger your documentation, the stronger your position.

How to protect yourself without getting married

You don't have to get married to protect your financial interests in a long-term relationship. California offers two practical tools that give unmarried couples meaningful legal protection.

Cohabitation agreement

A cohabitation agreement is a private written contract between two unmarried partners that spells out how property is owned, how finances are handled, and how assets will be divided if the relationship ends. It can also address whether one partner would provide financial support to the other after a separation. Think of it as a prenuptial agreement for people who are not getting married. Courts enforce these agreements when they are fair and properly executed, which makes them far more reliable than an oral understanding or an implied arrangement.

California law does require that any cohabitation agreement addressing support be tied to actual cohabitation. Support provisions are not enforceable for couples who are simply dating without living together. And any agreement that is heavily one-sided may face scrutiny. A family law attorney can help you draft something that holds up.

California domestic partnership

A registered domestic partnership gives you almost all of the same rights and responsibilities as marriage under California state law. This includes community property rights, spousal inheritance rights, the ability to make medical decisions for an incapacitated partner, parental rights, and the right to file state taxes jointly. Any two adults in a committed relationship can register, regardless of gender, by filing a Declaration of Domestic Partnership with the California Secretary of State.

One important limitation: domestic partnerships are not recognized by the federal government for most purposes. This affects federal taxes, Social Security benefits, immigration status, and federal retirement accounts. For couples with any of those concerns, speaking with an attorney before registering is worthwhile.

Both of these options require deliberate action. They don't happen automatically. If you are making significant financial or personal sacrifices for a relationship, the time to put protections in place is now, not after a dispute arises. You may also want to review our article on prenuptial agreements in California for additional context on how couples structure financial arrangements before formalizing a relationship.

Common law marriage myths

A few persistent misunderstandings about common law marriage in California are worth addressing directly, because acting on them can leave people legally unprotected.

Myth: If you live together long enough, you become legally married. This is false in California and in most other states. There is no cohabitation period that creates a marriage. Time together does not generate legal rights. You must take formal steps, either by marrying or by establishing a domestic partnership or cohabitation agreement.

Myth: Most states allow common law marriage. This is also false. As of 2025, only nine states and Washington D.C. recognize new common law marriages. The majority of states, including California, require a formal marriage process.

Myth: Buying property together creates marriage-like rights. It does not. Jointly purchased property is split equally between co-owners, but that is ordinary co-ownership law, not marital property law. You are not entitled to spousal support, inheritance rights, or any other marriage-based benefit just because you co-own an asset.

Myth: A Marvin claim is easy to win. It is not. These are civil lawsuits based on contract law. Courts require concrete evidence of an actual agreement. A long relationship and shared expenses alone are rarely enough. If you are counting on a Marvin claim as your financial safety net, you are in a precarious position.

This article is for informational purposes only and does not constitute legal advice. Laws vary by state and are subject to change. For guidance specific to your situation, schedule a free 15-minute call with a Hello Divorce account coordinator.