Common Law Marriage in California: Unmarried Couples' Options

Does California Recognize Common Law Marriage?

No. California abolished common law marriage by statute in 1895, and no court in the state will treat an unmarried couple as legally married based on cohabitation alone. This has been reaffirmed repeatedly, including in Estate of Edgett (1980), where the California Court of Appeal stated plainly that the doctrine was abolished and that courts "have consistently refused to equate the nonmarital relationship to a lawful marriage."

Living together, sharing a last name, filing joint tax returns, or maintaining joint bank accounts does not create a marriage under California law. In Beckman v. Mayhew (1975), a couple lived together for years, used the same last name for financial purposes, and shared a joint checking account. The court still found no marital relationship existed because the parties "were not married, knew that they were not married, and had no intention of marrying."

The One Exception: Out-of-State Common Law Marriages

California will recognize a common law marriage that was validly entered into in a state that permits it. Only a handful of states still allow common law marriage (including Colorado, Iowa, Kansas, Montana, and Texas, among others). If you established a valid common law marriage in one of those states and then moved to California, the state may treat your property as "quasi-community property," handled similarly to community property in divorce or probate proceedings.

What Property Rights Do Unmarried Couples Have in California?

Unmarried couples in California have significantly fewer automatic property rights than married couples. Community property laws and spousal support provisions under the Family Law Act apply only to legal marriages.

Here's what that means in practice:

• No automatic property sharing. Property acquired during a nonmarital relationship is not automatically shared. Ownership is controlled by title and, where applicable, contract. If only one partner's name is on a mortgage or property deed, the other partner generally has no automatic legal claim to that property, even if both contributed to payments.
• No inheritance rights. An unmarried partner has no default right to inherit from the other partner the way a spouse does under intestate succession.
• No control after death. A surviving unmarried partner has no automatic right to control the body, make funeral arrangements, or make medical decisions. The Sacramento County Public Law Library notes that a common law spouse "will be considered like any other friend, and has no rights at all to control such things."
• No marital communication privilege. The evidentiary privilege that allows married spouses to keep certain communications confidential does not extend to unmarried partners.

These gaps don't mean you're without options. They do mean you need to take affirmative steps (through contracts, estate planning, or formal legal status) to create the rights that marriage would otherwise provide automatically.

The Marvin Doctrine and Palimony in California

California's most significant legal framework for unmarried couples' property disputes comes from Marvin v. Marvin (1976), a California Supreme Court decision that established that agreements between unmarried partners about property and earnings can be legally enforced.

The court held that "adults who voluntarily live together and engage in sexual relations are nonetheless as competent as any other persons to contract respecting their earnings and property rights." An agreement between unmarried partners is valid as long as it is not based solely on sexual services. Courts can enforce both express contracts (those explicitly stated, whether written or oral) and may also look for implied agreements based on the couple's conduct.

What Is Palimony?

Palimony is a term used to describe support payments or property claims sought by one partner after an unmarried couple separates. It is not a statutory right. Instead, it arises from contract principles established under the Marvin doctrine.

To succeed in a palimony claim, the person bringing the lawsuit must prove that an agreement existed, whether written, oral, express, or implied. For claims involving asset sharing, the required standard of proof is "clear and convincing evidence," which is a higher bar than the "preponderance of evidence" standard used in most civil cases. This makes palimony lawsuits difficult to win in practice.

Why a Written Agreement Matters

The Marvin doctrine cuts both ways. It gives unmarried couples the ability to create enforceable financial arrangements, but it also leaves the door open to uncertain, expensive litigation when no written agreement exists. A written agreement removes ambiguity and avoids the need to reconstruct years of conduct and conversations in court.

Putative Spouse and Domestic Partnership Options

Beyond cohabitation agreements, California law provides two other frameworks that can give unmarried individuals property rights similar to those of married spouses.

Putative Spouse

A putative spouse is someone who has a good faith belief that a valid marriage exists, even though the marriage is actually void or voidable (for example, because of a procedural defect or a prior undissolved marriage). Under California Civil Code, a putative spouse may be entitled to "quasi-marital property" rights, meaning property acquired during the putative marriage can be divided similarly to community property.

This status is narrow. It requires a genuine, good faith belief in the marriage's validity. In Estate of Edgett, the court rejected a claim by a cohabitant who tried to analogize her situation to a putative marriage because she could not show a good faith belief that a valid marriage existed.

Registered Domestic Partnership

California's registered domestic partnership provides rights and responsibilities substantially equivalent to marriage, including community property protections and support obligations. To register, both partners must share a common residence and meet one of the following criteria:

• Both partners are of the same sex, or
• At least one partner is 62 years of age or older (meeting Social Security eligibility criteria)

Registered domestic partners receive property division and support rights under the Family Law Act, unlike unmarried cohabitants who rely on contract law.

How Cohabitation Agreements Address Property Without Marrying

A cohabitation agreement is a written contract between partners who live together but do not plan to marry. It defines financial responsibilities and property ownership during the relationship, and outlines what happens if the couple separates or one partner passes away.

California courts treat cohabitation agreements as enforceable contracts, similar to prenuptial agreements, provided they meet basic requirements under California contract law:

• In writing. While oral agreements can theoretically be enforced under Marvin, a written agreement is far more practical and reliable.
• Mutual agreement. Both parties must agree to the terms.
• Voluntary. Both parties must sign knowingly and voluntarily, without coercion.
• Full financial disclosure. Each partner should be transparent about their finances, similar to the disclosure required for prenups.

Common Provisions

Cohabitation agreements can include as many or as few terms as the couple needs. Typical provisions cover:

• Which assets belong to each partner individually and which are shared
• How joint bank accounts and shared expenses (utilities, groceries, rent) are handled
• How property (including real estate) is divided if the relationship ends
• Responsibility for debts incurred during the relationship
• What happens with shared property if one partner dies

Each partner should have independent legal counsel review the agreement. This helps ensure the contract holds up if it's ever challenged and that both parties understand their rights and obligations.

Cohabitation Agreements vs. Prenups: When Each Applies

A prenuptial agreement and a cohabitation agreement serve similar purposes, but they apply at different stages. A prenup is for couples who plan to marry. A cohabitation agreement is for couples who intend to stay together without marrying. Both require full financial transparency, and both benefit from each partner working with an independent attorney.

The core distinction is legal context. A prenup is governed by California's Uniform Premarital Agreement Act and takes effect upon marriage. A cohabitation agreement is governed by general contract law and takes effect when signed. If an unmarried couple later decides to marry, they would typically replace or supplement their cohabitation agreement with a prenup.

As Michael C. Cotugno, Esq., Managing Partner, Neptune Legal, has noted: "Meticulously defining assets and debts within a premarital agreement is not a limitation on your love; it is, fundamentally, a profound act of liberation." The same principle applies to cohabitation agreements. Whether you're planning to marry or not, putting financial expectations in writing creates alignment and reduces the risk of costly disputes down the road.

Both tools work best when each partner has independent counsel and both approach the process as a shared conversation about money, ownership, and expectations, not as an adversarial exercise.