Unmarried in California? Community Property Doesn’t Apply — Contract Law Does
If you’re not married and not a registered domestic partner in California, the community property system simply does not apply to you, no matter how long you’ve lived together or how intertwined your finances are. That surprises a lot of people — and it’s exactly why the landmark case Marvin v. Marvin matters so much.
A Marvin contract is an express or implied agreement between unmarried cohabitants to share property, earnings, or the value of services rendered during the relationship. Since community property law is off the table for unmarried couples, Marvin v. Marvin (1976) opened the door for these couples to enforce ordinary contract-law remedies instead — express contracts, implied contracts, quantum meruit, and equitable trusts.
Why Community Property Doesn’t Cover Cohabitants
California’s community property system attaches only to marriage and registered domestic partnership. Unmarried cohabitants get none of it by default:
- No community property presumption attaches to their earnings or purchases.
- They cannot claim quasi-marital property status — that doctrine is reserved for putative spouses in an invalid marriage, not for cohabitants who were never married at all.
- Property stays separately owned by whoever acquired it, unless a contract says otherwise.
The Four Contract Theories Under Marvin
Marvin v. Marvin and its progeny recognize four distinct routes to property or support rights for unmarried couples:
- Express contracts — an oral or written agreement to share property, earnings, or a business.
- Implied contracts — an agreement inferred from the parties’ conduct, such as joint bank accounts, commingled funds, or presenting themselves publicly as a couple with shared finances.
- Quantum meruit — recovery for the reasonable value of services rendered, such as homemaking, childcare, or unpaid work in a partner’s business.
- Constructive or resulting trusts — equitable doctrines used to prevent one partner from being unjustly enriched at the other’s expense.
The Meretricious Contract Limitation
Not every agreement between cohabitants is enforceable. California draws a sharp line around contracts based purely on sex.
- An agreement based solely on sexual services is unenforceable as against public policy.
- An agreement can include a sexual relationship as part of the arrangement, as long as it also contains non-sexual, property-related consideration — the court examines the whole agreement.
- If the only consideration is sexual services, the entire agreement fails; courts will not sever out a “legitimate” piece.
| Scenario | Enforceable? | Why |
|---|---|---|
| Pay for sexual services only | No | Sole consideration is meretricious |
| Pay for companionship + managing a business | Yes | Non-sexual property/business consideration present |
| Oral 50-50 profit-sharing agreement, no sex mentioned | Yes | Standard express contract |
| Pay someone to leave their spouse and marry you | No | Void as contrary to public policy (derogation of marriage) |
A Related Trap: Contracts in Derogation of Marriage
A contract is also void — regardless of sexual content — if its basis undermines an existing marriage, such as an agreement to pay someone to divorce their spouse. Courts will not enforce agreements built on inducing someone to break a marital relationship, because that violates public policy independent of the meretricious-consideration rule.
Worked Example
Facts: Wendy and Hank cohabitate for 15 years without ever marrying or registering as domestic partners. Early on, they orally agreed that Wendy would quit her job to manage Hank’s restaurant, and in exchange they would split all restaurant profits 50-50. Over the years, they also maintained a joint bank account depositing both their earnings and paying joint bills. When they separate, Hank claims Wendy has no property rights because they were never married.
Analysis: Hank is wrong on the law. Because Wendy and Hank were never married or in a registered domestic partnership, community property law does not apply — but that doesn’t leave Wendy empty-handed. She has at least two viable theories:
- Express contract: The oral 50-50 profit-sharing agreement regarding the restaurant is directly enforceable; nothing about it involves sexual consideration, so the meretricious-contract limitation never comes into play.
- Implied contract: Even setting the express agreement aside, 15 years of joint bank accounts, commingled earnings, and shared bill-paying supports an inference that the couple impliedly agreed to share their finances.
If neither theory were available — say, no joint account and no clear oral agreement — Wendy could still fall back on quantum meruit for the reasonable value of her unpaid work managing the restaurant.
Common Mistakes to Avoid
- Assuming Marvin contracts only apply to same-sex or unconventional couples. They apply to any unmarried parties, regardless of the composition of the relationship — the original case itself involved an unmarried opposite-sex couple.
- Thinking any agreement mentioning sex is automatically void. Only agreements where sexual services are the sole consideration fail; mixed agreements with genuine property or business terms are enforceable.
- Confusing Marvin analysis with community property or putative spouse analysis. Married couples get CP; putative spouses in an invalid marriage get quasi-marital property; unmarried cohabitants get contract law only. Mixing these up is a common Bar Exam scoring trap.
FAQ
Can unmarried couples in California claim community property?
No. Community property law applies only to marriages and registered domestic partnerships. Unmarried cohabitants must rely on contract-based Marvin claims — express, implied, quantum meruit, or equitable trust theories.
Is a cohabitation agreement based partly on a sexual relationship enforceable?
Yes, as long as it also includes non-sexual consideration, such as an agreement to manage a business or share property. Only agreements where sexual services are the sole consideration are unenforceable.
What can an unmarried partner recover if there’s no written or oral agreement?
Quantum meruit — the reasonable value of services like homemaking, childcare, or business labor provided during the relationship, even without an express or implied contract.
Key Takeaways
- Unmarried cohabitants get no community property or quasi-marital property rights in California — only contract law applies.
- Marvin v. Marvin recognizes four theories: express contract, implied contract, quantum meruit, and constructive/resulting trust.
- Agreements based solely on sexual services are unenforceable; mixed agreements with real property or business consideration are fine.
- Contracts in derogation of marriage — like paying someone to leave a spouse — are void regardless of sexual content.
- On the Bar Exam, always sort the facts first: married/RDP → CP; invalid marriage with good faith → putative spouse/QMP; unmarried cohabitants → Marvin contract analysis.
This article is educational and is not legal advice. Consult a licensed California attorney about your situation.
Related guides
- void and voidable marriages
- registered domestic partners and community property
- consideration in contract law
- statute of frauds