Unmarried Couples and Property Rights in California: A Guide to Marvin Claims

When a married couple separates in California, the Family Code provides a framework for dividing property and determining spousal support. For unmarried couples, the rules are very different.

California does not automatically give unmarried partners the same property or support rights as spouses. But that does not necessarily mean that a long-term partner walks away with nothing. Depending on what the couple agreed to and how they handled their finances during the relationship, one partner may have claims under Marvin v. Marvin, the California case that established what are commonly called “Marvin claims” or “palimony” claims.

Here are some of the questions that come up most often.

We were together for years but never married. Do I have any rights?

Possibly, but the length of the relationship alone does not create the same rights that come with marriage.

A Marvin claim is based on contract law. The central question is whether the partners had an agreement about financial support, property ownership, sharing income, or other financial rights.

That agreement can be written, oral, or, in some circumstances, implied from the way the couple conducted themselves during the relationship.

What if we never had a written agreement?

That is common.

Many Marvin cases involve an alleged oral agreement. For example, one partner may claim that the couple agreed that one person would financially support the family while the other stayed home, cared for children, managed the household, or supported the working partner’s career.

An agreement may also be implied from the couple’s conduct. That makes the facts of the relationship particularly important.

What kinds of facts can show that we had an agreement?

There is no single fact that establishes a Marvin claim. Courts look at the relationship as a whole.

Relevant evidence can include how the couple handled bank accounts and credit cards, how property was titled, whether they pooled income, what they told friends and family, how they described their relationship on employment or benefit forms, and whether one partner was named as a beneficiary of life insurance, retirement accounts, a will, or a trust.

Emails, text messages, cards, and other communications can also be important. Statements such as “this house belongs to both of us” or “you don’t need to work because I’ll always take care of you” may become significant evidence when the parties later disagree about what they promised each other.

I stayed home and raised our children while my partner worked. Does that matter?

It can.

California recognizes that domestic services can constitute consideration for an enforceable agreement between unmarried partners. Those services can include caring for children, managing the household, cooking, cleaning, caring for pets, or assisting with a partner’s business.

But performing those services does not automatically entitle someone to half of the other person’s property or to lifetime support. There still has to be a legal basis for the particular claim being made.

Can I receive “palimony” after we separate?

Potentially.

If the parties had an enforceable agreement that one partner would provide financial support, a court may enforce that agreement. But this is not the same thing as spousal support.

A family court does not simply look at the parties’ incomes and decide what support would be appropriate under California’s spousal support laws. A Marvin claimant has to establish the agreement and the right to support under ordinary contract principles.

That distinction can be very important, particularly at the beginning of a case because the procedures available to obtain temporary financial support are much more limited than they are in a divorce.

We bought a house together. What happens to it?

Real property is often one of the biggest issues when an unmarried couple separates.

The analysis can depend on how title is held, who contributed money toward the purchase or improvements, and, importantly, what the parties agreed about ownership.

If one partner contributed substantially to a property titled only in the other partner’s name, that does not necessarily end the inquiry. Depending on the facts, claims involving an agreement to share the property, reimbursement, an equitable lien, a resulting or constructive trust, quiet title, or partition may come into play.

These cases can become significantly more complicated when the legal title to the property does not match what one partner says the couple agreed to.

Does it matter that the house, business, or investments are only in my partner’s name?

Yes, but title is not necessarily the entire analysis.

One of the central issues in many Marvin cases is the difference between legal ownership on paper and what the parties allegedly agreed would happen economically.

For example, a business may have been legally owned by one partner even though both partners worked in the business and treated it as a joint enterprise. Similarly, one partner may hold title to a house even though the other claims they contributed money or services based on an agreement that they would share in the property.

The stronger the documentary evidence surrounding those arrangements, the easier it is to evaluate the potential claim.

What if my partner says we never had any agreement?

That is one of the central evidentiary problems in Marvin cases.

An oral agreement can become a “you said, I said” dispute. That is why contemporaneous evidence matters.

Texts, emails, financial records, estate planning documents, beneficiary designations, property records, domestic partnership forms, and testimony from people who heard the parties discuss their arrangement can all help establish what the parties understood during the relationship.

The conduct of the parties over many years can sometimes be just as important as a particular conversation.

Do we have to have lived together full time?

Not necessarily.

Cohabitation can be important when domestic services are alleged to be part of the agreement, but California cases recognize that modern relationships do not always involve living under the same roof seven days a week.

Part-time cohabitation may be sufficient depending on the nature and stability of the relationship and the agreement being asserted.

And where the claim is based on pooling money to acquire property rather than providing domestic services, cohabitation may not play the same role.

What if we have children together?

Parentage issues such as custody and child support are handled under family law. A Marvin claim concerning the unmarried couple’s financial relationship is a civil claim.

That means separating unmarried parents can potentially have both a family law case concerning their children and a separate Marvin action concerning property or financial agreements. In appropriate circumstances, related cases may ultimately be coordinated or heard together.

It is important to identify the potential Marvin issues early rather than assuming that everything arising from the relationship will automatically be addressed in the parentage case.

How long do I have to bring a Marvin claim?

This is one of the most important issues to evaluate immediately.

According to the type of claim, different statutes of limitation may apply. A claim based on breach of a written agreement generally has a four-year limitations period, while claims based on oral or implied agreements generally have a two-year period. A quantum meruit claim also generally has a two-year limitations period.

Determining when that period began can be complicated.

The clock does not necessarily start simply because the relationship ended. It can begin when one partner clearly stops performing the alleged agreement or communicates a position inconsistent with it. Conversely, if a partner continues providing the promised support after separation, the breach may occur later.

For that reason, someone who thinks they may have a Marvin claim should have the timing analyzed early.

Can my former partner be required to pay my attorney’s fees?

Unlike divorce cases, there is no comparable statutory right allowing a Marvin plaintiff to require the wealthier partner to contribute to attorney’s fees based simply on the parties’ relative financial circumstances.

That can make these cases expensive to pursue, particularly because some cases also require forensic accountants, appraisers, economists, or other experts.

The economics of the case therefore matter. A potential claim should be evaluated not only in terms of whether a legal theory exists, but also the value of the property or support at issue, the available evidence, and the likely cost of pursuing it.

What should I gather before talking to an attorney?

Start with the documents that tell the story of the relationship financially.

That may include texts and emails discussing money or property, bank and credit card records, deeds and purchase documents, records showing contributions toward a home, documents relating to jointly operated businesses, insurance and retirement beneficiary designations, estate planning documents, domestic partnership or benefit forms, and communications with third parties about your financial arrangement.

It is also useful to create a basic timeline: when you began living together, major career changes, when children were born, when significant property was acquired, what each person contributed, when the relationship ended, and when financial support or access to shared resources stopped.

What is the biggest misconception about Marvin claims?

Probably that California has a form of “common law marriage” under which a long relationship automatically gives an unmarried partner rights similar to a spouse.

That is not how Marvin claims work.

The question is not simply how long you were together or whether the relationship looked like a marriage. The analysis focuses on what the parties agreed to, what each person did in reliance on that agreement, how they actually structured their financial lives, and what evidence exists to prove it.

For unmarried couples with significant property, a shared business, substantial differences in income, or one partner who stepped away from a career to support the family, those questions can have significant financial consequences.

The reverse is also true. Couples who want certainty about their respective rights can use a written cohabitation agreement to establish in advance how property, income, expenses, and support will be treated if the relationship ends.

What Happens to a Business in a Prenuptial Agreement?

If You Own a Business Before You Get Married

California law does not have a clear, automatic answer for what happens when one spouse runs a premarital business during the marriage and it grows. Courts can award the other spouse a share of that growth, and the outcome depends on expert witnesses, valuations, and a judge's discretion. That process is expensive, unpredictable, and often leaves both spouses feeling the result was unfair.

What a prenuptial agreement can do:

Keep it yours, fully. You and your spouse agree that the business, and everything it earns and grows into, stays your separate property. Your spouse gives up any claim to the business or its appreciation. This is the simplest option and the one with the least potential for future dispute.

Keep the business yours, but share the income. The business stays yours, but a portion of what it earns each year is treated as money belonging to both of you. You keep the equity and the long-term value; your spouse participates in the cash flow. This is a middle-ground option that works well when both of you want to feel the marriage is economically fair without putting the business itself at risk. One thing to know: defining "income" is harder than it sounds: a business owner controls how much money the business pays out versus keeps inside the company, so the agreement needs to be specific about how income is calculated to make sure this option works as intended.

Pre-agree on what counts as a fair return. Instead of letting a court decide later what portion of the business growth your spouse is entitled to, you agree on that formula now, while you're on good terms and both understand the business. This replaces an expensive courtroom battle with a calculation you both already approved.

If You Start or Buy a Business During the Marriage

In California, income earned during marriage generally belongs to both spouses. That means a business you build from scratch during the marriage could be considered jointly owned, even if your spouse had nothing to do with it. On the other hand, if both of you work to build it, the law may not fully account for that either. Couples are often surprised by this.

What a prenuptial agreement can do:

Treat it as belonging to both of you from day one. If you're building something together,or if the spirit of your marriage is that everything you create during it is shared,you can simply agree that any business started during the marriage is community property. Clean, simple, and consistent with how many couples actually think about their finances. If one of you puts in separate money to fund it, that person gets reimbursed first before the split.

Keep it separate, but share what it pays you. The business is yours, the equity, the long-term value, the upside. But your salary and bonuses from it belong to both of you. This option protects the business as an asset while ensuring your spouse benefits from your work during the marriage. One thing to know: defining "income" is harder than it sounds, a business owner controls how much money the business pays out versus keeps inside the company, so the agreement needs to be specific about how income is calculated to make sure this option works as intended.

Start it as yours, but let it gradually become shared. Think of this like an employment vesting schedule. The business starts as your separate property, but over time, typically up to ten years, a growing percentage becomes community property. If the business is sold, there's an acceleration that gives your spouse a fair share of what had been building up. This option works well when one spouse is the founder and builder, but both want to feel that a long marriage is reflected in how the business is treated.

If You're Making Investments in Someone Else's Business

If you invest your own money in a startup or small business during the marriage, questions can arise about whether that investment and its returns belong to you, to both of you, or somewhere in between, especially if you later get more involved in running it.

What a prenuptial agreement can do: 

Passive investment stays yours. If you put in your own money and stay hands-off, the investment and whatever it earns stays your separate property.

Active involvement changes the picture. If you later roll up your sleeves and start working in that business, the agreement can provide that at that point it becomes a shared asset,with you getting reimbursed for what you originally put in.

The right choice depends on a few practical questions:

How involved will both of you be in the business?  

How important is simplicity?  

What feels fair to both of you right now?  

Could a Prenup Actually Strengthen Your Relationship?

Financial conflict is one of the most common sources of stress in a marriage, but a lot of the public conversation around prenups still assumes they're about distrust or planning for divorce. That's not what I see in practice.

The part people tend to miss is that the value of a prenup is not just the document. It's the process.

The Conversation Most Couples Avoid

What I see come up again and again:

• Uneven income, or expected changes to income

• One person planning to step back for children

• Existing assets like real estate or business interests

• Family money or an anticipated inheritance

• Debt that hasn't been fully discussed

• Very different ideas about spending, saving, and risk

Without a prenup, those issues don't go away. They just stay unspoken until something forces the conversation later. 

What the Process Actually Looks Like

People tend to imagine prenups as adversarial. Two lawyers negotiating against each other while the couple sits in the middle.

My job is usually to translate options and consequences, not fight. And because full financial disclosure is required in California, both people have to put everything on the table: assets, debts, income, obligations. For a lot of couples, it's the first time they've had a truly transparent conversation about money.

You also learn a lot about your partner in the process. How they handle discomfort. Whether they avoid or engage. What they actually value when something is on the line. That information is useful well beyond the agreement itself. 

Another misconception is that prenups only matter if you divorce. They shape the marriage itself.

They can:

• Create clarity around ownership and responsibility

• Reduce ambiguity about financial roles and expectations

• Protect family assets or children from a prior relationship

• Avoid future conflict by making decisions when things are calm

For example, if one person is considering stepping back from work, it's much easier to talk through what that means financially before it happens than after. The agreement becomes a reference point not something you revisit every day, but something that removes uncertainty.

The couples who benefit most from prenups aren't the ones assuming their relationship will fail. They're the ones willing to be clear with each other early.

If you can't talk about money before the wedding, you'll still be talking about it later. The difference is that later it's usually happening under pressure.

A prenup just moves that conversation to a moment where you have more control, more information, and a shared goal of getting it right.

Is Your Prenup Actually Enforceable? What Couples in California Need to Know

You've seen it in the headlines. A celebrity couple splits, one spouse tries to invoke the prenuptial agreement, and suddenly there's a court battle over whether the thing is even valid. How does a legally signed document end up worthless?

The short answer: prenups can be thrown out. If you're considering a prenuptial agreement (or already have one), here's what actually determines whether it will hold up.

The good news is that California law favors prenuptial agreements — meaning courts start with a general presumption that they should be enforced. The bad news is that there are several specific ways an agreement can be invalidated, and some of them are surprisingly easy to trigger.

In California, the rules for prenups signed after January 1, 2002 are governed by the California Premarital Agreement Act. Under the Act, a prenup will be unenforceable if: it wasn't made voluntarily, it's unconscionable and proper financial disclosures weren't made, or it violates public policy. Let's break each of those down.

The Agreement Must Be Truly Voluntary

Under California law, a premarital agreement is presumed to have been signed involuntarily unless four specific conditions are met:

1. Each party had independent legal counsel — or formally waived it. This means your own attorney, not one suggested or paid for by your partner. If your fiancé recommended a specific attorney for you to use, that could raise red flags. If one person is paying both attorneys' fees, that's also a problem. The safest approach: each person hires their own lawyer independently.

If you chose to waive counsel entirely, that waiver must be in a separate document — it cannot simply be buried inside the prenup itself.

2. There was a seven-day waiting period. You cannot be handed a prenup and asked to sign it the same week — or even a few days later. California requires at least seven calendar days between when you're first presented with the agreement and when you sign it. Springing a prenup on someone the week before the wedding is a classic way to get it thrown out later.

3. You had the legal capacity to sign. You must have been of sound mind when you signed. Signing under the influence of substances, during a mental health crisis, or in any other impaired state can invalidate the agreement.

4. No fraud, duress, or undue influence. This is more nuanced than it might sound. Duress means being threatened — someone fearing for their safety, family, or financial security if they don't sign. Undue influence means someone took unfair advantage of your vulnerabilities or pressured you in a way that overrode your free will.

Importantly, persuasion and negotiation are not undue influence. Neither is the fact that one person really, really wanted to get married. But a history of domestic violence, threats to call off the wedding, or exploiting someone's financial desperation can all tip the scales toward invalidation.

Post-Marital Agreements

Most people have heard of a prenuptial agreement. Fewer know that couples can enter into a similar agreement after they are already married. These are called postnuptial agreements — or post-marital agreements — and they serve many of the same purposes as a prenup. But they come with a set of legal and practical complications that prenups do not, and understanding those differences matters before you decide to pursue one.

The Key Legal Difference: No Statutory Framework

Prenuptial agreements in California are governed by the Uniform Premarital Agreement Act, codified in the Family Code. There is a clear statutory framework that tells attorneys, clients, and courts exactly what is required for a prenup to be valid and enforceable.

Postnuptial agreements have no equivalent statutory framework in California. They exist in a more legally ambiguous space, which means the standards for enforceability are less predictable and the risk of a court setting the agreement aside is meaningfully higher.

Fiduciary Duties Change Everything

When you get married in California, you and your spouse owe each other fiduciary duties. That is not a formality — it is a legal standard that applies to every financial transaction between spouses, including the negotiation and signing of a postnuptial agreement.

This is the central reason postnuptial agreements are more complicated than prenups. Before marriage, parties are dealing at something closer to arm's length. After marriage, they are fiduciaries to each other. Every postnuptial negotiation takes place in that context, and attorneys on both sides have to take it seriously.

What does that mean practically? It means both parties need full, transparent financial disclosure. It means neither party can be pressured, misled, or left without adequate time and information to make a genuinely informed decision. And it means that attempting to streamline or shortcut the process creates real legal risk for the agreement and potential malpractice exposure for the attorneys involved.

Why Couples Pursue Postnups

The reasons couples want postnuptial agreements are usually one of the following:

To rebalance a financial inequity. One spouse may have significantly more separate property wealth than the other, and both parties want to transmute some of that separate property to community property to create a greater sense of shared financial stake in the marriage. A common example is adding a spouse's name to the deed of a home purchased before the marriage.

To strengthen a marriage under strain. Some couples going through a difficult period believe that restructuring their finances more equitably will reduce tension and reinforce their commitment to each other. The postnup serves as a kind of financial reset.

To create a pre-negotiated framework. Sometimes couples want to agree in advance on how their assets would be divided if the marriage were to end, on terms they both consider fair now, before the emotional intensity of a divorce makes negotiation harder.

All of these are legitimate reasons. But they also illustrate why postnuptial agreements require careful handling: the same document that is meant to strengthen a marriage can look, in hindsight, like preparation for a divorce.

The Hidden Risk: Undisclosed Intent

One of the more challenging scenarios in postnuptial practice is when both parties present as wanting to strengthen their marriage, but one of them privately intends to use the agreement as a stepping stone to divorce. The agreement is negotiated in apparent good faith, signed, and then shortly afterward one spouse files.

Courts are aware of this dynamic. An agreement negotiated under the banner of reconciliation, where one party had an undisclosed intention to divorce, faces a real risk of being set aside. Drafting postnuptial agreements in a way that accounts for this risk — through strong disclosure provisions, independent counsel requirements, and clear recitals about the parties' intent — is part of what makes these agreements defensible.

What This Means for You

If you are considering a postnuptial agreement, here is what you should know going in.

It will take longer and cost more than a prenup. The fiduciary duty framework requires more rigorous process, more documentation, and more careful attention to disclosure and informed consent on both sides.

Both parties need independent counsel. This is not optional. An attorney who represents both spouses in a postnuptial negotiation is walking into a conflict of interest that can undermine the agreement entirely.

Full financial disclosure is mandatory. Both parties need to understand what they are agreeing to, what rights they are giving up, and what the realistic alternatives are.

The goal matters. A postnuptial agreement negotiated with genuine mutual intent to clarify finances and strengthen a marriage is in a very different legal position than one negotiated while one party is already planning an exit. The recitals and process surrounding the agreement should reflect the actual purpose.

Done carefully, postnuptial agreements can be valuable and enforceable. Done carelessly, they can give a false sense of security and fall apart exactly when they are needed most.