It’s one of the most persistent myths in American family law: if you live with your partner long enough, you’re automatically married under “common law.” Millions of couples believe this. And in California — one of the most progressive states in the country — many assume those protections surely exist.
They don’t. Not in the way most people think.
The Short Answer: California Does Not Recognize Common Law Marriage
California abolished common law marriage in 1895. That’s not a typo — 1895. Since then, the state has not recognized new common law marriages, no matter how long two people have lived together, combined their finances, referred to each other as spouses, or raised children together.
If you want the legal rights and responsibilities that come with marriage in California, you need a marriage license and a formal ceremony recognized by the state.
The Exception: Marriages Formed in Other States
Here’s where it gets slightly nuanced. California does recognize common law marriages that were validly formed in states where they’re still legal. If you and your partner established a common law marriage in Texas, Colorado, Iowa, or one of the other states that still recognize them — and then moved to California — California law will generally honor that marriage.
But if you’ve never lived in a state that allows common law marriage, this exception doesn’t help you.
What About Domestic Partnerships?
California does offer a meaningful alternative: registered domestic partnerships. Same-sex couples have had access to this for years, and since 2020, opposite-sex couples over 18 can also register.
A registered domestic partnership in California provides many of the same rights as marriage, including:
- Inheritance rights
- Hospital visitation and medical decision-making authority
- Rights to property acquired during the partnership
- Spousal support obligations upon dissolution
- Parental rights and responsibilities
But registration is required — it doesn’t happen automatically just because you’ve been together for years.
The Real Risk for Unmarried Cohabiting Couples
When long-term cohabiting couples in California split up without formal legal status, the results can be devastating. Without marriage or a domestic partnership registration, the law treats you largely as legal strangers when it comes to:
- Division of property acquired during the relationship
- Rights to a shared home (even if you’ve lived there for decades)
- Claims to your partner’s retirement accounts or pension
- Inheritance if your partner dies without a will
Palimony and Cohabitation Agreements
While California doesn’t recognize common law marriage, courts have recognized “palimony” — financial support for a former partner after a breakup — in certain circumstances. The landmark 1976 case Marvin v. Marvin established that courts can enforce agreements between cohabiting partners, whether written or implied.
However, these cases are complex, expensive to litigate, and uncertain in outcome. A far better approach is a cohabitation agreement — a legal contract that spells out how property and finances will be handled if the relationship ends. Think of it as a prenuptial agreement for unmarried partners.
What Couples Should Do
If you and your partner are committed to building a life together in California, don’t rely on the myth of common law marriage. Either get legally married, register as domestic partners, or work with a family law attorney to create a cohabitation agreement that protects both of you. A little legal planning now prevents a lot of heartbreak later.
