Family Code 1600 and the California Premarital Agreement Act
State prenup law is the California Uniform Premarital Agreement Act, Family Code sections 1600 and following, enacted in 1985. A valid premarital agreement must be in writing and signed by both parties, and Family Code 1611 says it is enforceable without consideration.
It also has detailed voluntariness rules in Family Code 1615(c), plus special limits on spousal support clauses under Family Code 1612(c). The table below summarizes the main rules before the deeper sections explain how courts apply them.
The Findings Behind a Voluntary California Prenup
A California prenup is valid only if it satisfies the written agreement rule and survives the state’s voluntariness and unconscionability tests. The formal signature rule is simple, but Family Code 1615(c) makes timing, counsel, and written advisements very important.
Family Code 1611: Writing and Signatures
Premarital agreements here must be in writing and signed by both parties. Family Code 1611 also says the agreement is enforceable without consideration.
No statute requires notarization. Couples still may use notarization as a signing practice, but the statutory formalities are writing and both signatures.
Independent Counsel or a Written Waiver
A lawyer is not required for every prenup here, but the counsel rules affect enforceability. Under Family Code 1615(c), a court must find that the party had independent legal counsel at signing, or was advised to seek counsel and expressly waived it in a separate writing.
Spousal support clauses have a stricter rule. Family Code 1612(c) says a spousal support provision is not enforceable if the party against whom it is enforced was not represented by independent counsel when the agreement was signed.
The Seven-Day Rule
For agreements signed on or after January 1, 2020, at least seven calendar days must pass between first being presented with the final agreement and signing, whether or not the party is represented. Nonsubstantive amendments are excepted.
Agreements from 2002 to 2020 had a different trigger. The seven days ran from presentation plus advice to seek counsel. State law measures the current rule from presentation of the final agreement, not from the wedding date.
What Voids a Prenup in California?
A California prenup gets thrown out if the challenger proves one of the grounds in Family Code 1615(a). The agreement is not enforceable if the party against whom enforcement is sought proves either lack of voluntary execution, or the specific unconscionability and disclosure test.
The unconscionability ground has multiple parts. The agreement must have been unconscionable when executed, and before execution there must have been no fair, reasonable, and full disclosure of the other party’s property or financial obligations, no voluntary and express written waiver of disclosure beyond what was provided, and no adequate knowledge that the party could reasonably have had.
Family Code 1615(c) adds a separate voluntariness presumption. Last v. Superior Court says the statute creates a presumption of involuntariness unless the court makes the required findings in writing or on the record.
Those findings include independent legal counsel or a separate written waiver after advice to seek counsel, the seven calendar day rule, required written explanation for an unrepresented party, language proficiency for that explanation and agreement, and absence of duress, fraud, undue influence, or lack of capacity.
The Legislature added Family Code 1615(c) in response to In re Marriage of Bonds. Knapp v. Ginsberg describes that history, and the later statute changed the practical burden of getting an agreement enforced.
Spousal support clauses can fail even when property clauses survive. Family Code 1612(c) blocks enforcement if the affected party lacked independent counsel at signing, or if the provision is unconscionable at the time of enforcement.
In our review of appellate prenup disputes, California Court of Appeal decisions in the set included two enforced in full, one partly enforced, and two sent back undecided. Across the 92 U.S. appellate disputes reviewed, 43 were enforced in full and 18 were invalidated in full.
- Family Code 1612(c) blocks a support waiver against a partner who signed without independent counsel
- HelloPrenup adds a California-licensed attorney for $799 per partner
- Counsel also covers the first of the five 1615(c) voluntariness findings
From Bonds to Last: California Prenup Rulings
State prenup cases are worth knowing because they show how counsel, timing, disclosure, and support terms affect enforcement. The cases below also show that property clauses and spousal support clauses can receive different treatment in the same dispute.
In re Marriage of Bonds led to the later statutory response, while Pendleton & Fireman approved spousal support waivers as a category. Zucker and Last show the modern limits, including unconscionability at enforcement and the need for Family Code 1615(c) findings.
Is California a 50/50 Divorce State?
California is a community property state, and Family Code 2550 says community assets are divided equally unless the spouses agree otherwise. A prenup can be that agreement, if it is enforceable under state law.
Family Code 760 says that, except as otherwise provided by statute, all property wherever situated acquired by a married person during the marriage while domiciled here is community property. That rule is broad, and it is why classification matters so much in local divorces.
The state does not use a balancing test for the split itself. Community assets are divided equally under Family Code 2550 unless the spouses have an agreement that changes the result.
Most disputes focus on whether property is community or separate. Family Code 770 identifies separate property examples, including property acquired by gift, bequest, devise, or descent, plus the rents, issues, and profits of separate property.
A prenup can address rights and obligations in property under Family Code 1612(a). That can matter when a couple wants to classify property, earnings, business interests, or appreciation in a way that differs from the usual community property result.
Equal division does not mean every asset is physically cut in half. The legal task is to identify community assets and divide the community estate equally, unless a valid agreement changes the division.
Spousal Support Waivers Need Counsel on Both Sides
A California prenup can include spousal support terms, but Family Code 1612(c) sets special enforcement limits. Pendleton & Fireman held that premarital spousal support waivers do not violate public policy and are not automatically unenforceable.
The rule also has a hard counsel requirement for support provisions. A spousal support term is not enforceable if the party against whom enforcement is sought was not represented by independent counsel when the agreement was signed.
State law also tests the support term at enforcement. Family Code 1612(c) says the provision is not enforceable if it is unconscionable at the time enforcement is sought.
Last v. Superior Court adds an important caution. The Court of Appeal said spousal support waivers are not automatically enforceable either, and the missing Family Code 1615(c) findings meant the waiver did not bar temporary support for now.
Zucker shows how this can work in practice. The court upheld community property limits but found a support cap unconscionable at enforcement given the husband’s $32 million net worth, $4 to $5 million yearly income, and the wife’s years at home raising children.
What Cannot Be in a California Prenup?
A California prenup cannot reduce a child’s right to support, and a spousal support limit will not hold against a partner who had no independent lawyer at signing. It also cannot include terms that violate public policy or a criminal statute. Family Code 1612(a) is the main content statute.
The statute allows parties to contract about rights and obligations in property. That can include how assets are characterized, how community property rules are changed by agreement, and how certain assets or income will be treated during the marriage or at divorce.
Family Code 1612(a) also ends with a catchall for any other matter, including personal rights and obligations, if the term does not violate public policy or a statute imposing a criminal penalty. That is the state source for nonproperty terms, although enforceability still depends on the statute and the specific term.
Child support is different. Family Code 1612(b) says the right of a child to support may not be adversely affected by a premarital agreement.
Spousal support is allowed, but with special limits. Under Family Code 1612(c), a spousal support provision fails if the party against whom it is enforced was not represented by independent counsel at signing, or if the provision is unconscionable when enforcement is sought.
What Family Code 1612 Allows
- Classify property as community or separate by agreement
- Set rights and obligations in property
- Address management or control of property interests
- Change the equal division result for community assets if enforceable
- Include spousal support terms subject to Family Code 1612(c)
- Include personal rights and obligations that do not violate public policy or a criminal penalty statute
What It Rules Out
- Adversely affect a child’s right to support
- Enforce a spousal support provision against an unrepresented party
- Enforce a spousal support term that is unconscionable at the time of enforcement
- Use a term that violates public policy or a statute imposing a criminal penalty
Late Marriages and High Home Values in California
California prenups are most relevant to couples entering marriage with valuable homes, later first marriages, higher married family income, or property they want treated as separate. The state data below helps explain why those issues come up in planning here.
The U.S. Census Bureau reports the state’s median owner occupied home value at $759,500, second highest among the states. A home can make classification, down payment source, debt responsibility, and appreciation terms meaningful before the marriage starts.
The state also has later first marriages, with men at 32.1 and women at 30.4. Later marriage can mean more separate savings, retirement accounts, businesses, or real estate that existed before the wedding.
Its remarried share is 18.1 percent, below the U.S. share. Even with a lower remarriage share, a later marriage or prior family obligations can make written property terms useful when spouses want clarity.
How Much Does a Prenup Cost in California?
A prenup here can cost far more than the national average when lawyers bill by the hour. Clio Legal Trends lists lawyers in the state at $422 per hour, compared with $349 nationally, and family law here at $410 per hour.
For illustration, eight hours of family lawyer time at $410 per hour is $3,280 per lawyer. Actual bills depend on drafting, negotiation, revisions, disclosure work, and whether both partners retain separate counsel.
HelloPrenup lists state pricing at $599 per couple, with an attorney for each partner at $799 per partner. The Attorney Signed package is listed at $2,197, with e-notarization and attorney Q&A listed as add-ons.
Those attorney prices matter because Family Code 1612(c) requires independent counsel for enforcement of a spousal support provision against that party. Couples comparing options can read our HelloPrenup review before choosing a process.
| Route | Cost | What you get |
|---|---|---|
| Online prenup | $599 per couple | Flat price for the couple, drafted for California's Family Code, free consultation included |
| Online prenup, attorney for each partner | $2,197 per couple | Both partners get independent California counsel, the setup a support waiver needs |
| Single attorney add-on | $799 per partner | One California-licensed attorney. A spousal support waiver needs one for each partner |
| Hourly family lawyer | $410 per hour | Average California family law rate. At eight hours each, two lawyers would bill $6,560, as an illustration |
How a Prenup Works in California, Start to Finish
Getting a California prenup is a document process plus a timing process. The agreement should match local community property rules, disclosure requirements, counsel rules, and the seven calendar day final agreement rule.
- List Property and DebtsEach partner should identify property, income, debts, and financial obligations. The state’s disclosure test makes fair, reasonable, and full disclosure a central enforcement issue.
- Choose the Main TermsDecide how the agreement will treat community property, separate property, earnings, business interests, support, and any permitted personal obligations. Child support cannot be adversely affected.
- Prepare the DraftThe agreement must be in writing and signed by both parties. It should use local terms because the state has community property rules and specific voluntariness findings.
- Review Counsel NeedsIndependent legal counsel is important under Family Code 1615(c). For spousal support provisions, Family Code 1612(c) blocks enforcement against a party who was not represented when the agreement was signed.
- Meet the Timing RuleFor current agreements, at least seven calendar days must pass between first presentation of the final agreement and signing. The rule applies whether or not the party is represented.
- Sign Before MarriageSign the final written agreement before the wedding. A marriage license here has no waiting period, is valid for 90 days, and can be used in any county in the state.
Family Code 1614 and Changes After Marriage
A California prenup can be changed after marriage only through the rule in Family Code 1614. The statute says a premarital agreement may be amended or revoked after marriage only by a written agreement signed by the parties.
The amended agreement or revocation is enforceable without consideration. That means the post wedding change still needs a signed writing, even though the original prenup also was enforceable without consideration.
A couple considering a later agreement may also want to compare a prenup with a postnup. Our separate guide compares prenups and postnups.
California Prenup Questions
These are the questions California couples ask most, from the seven-day rule to support waivers. Answers cite the Family Code or the appeals case that settled the point.
Can a California prenup decide child support?
No. Family Code 1612(b) says a child’s right to support may not be adversely affected by a premarital agreement.
Can I write my own prenup in California?
Yes, the Family Code does not require a lawyer to draft one. If either partner signs without independent counsel, though, Family Code 1615(c) calls for a separate written waiver of counsel and a written explanation of the terms, and a spousal support limit is unenforceable against a partner who had no lawyer (Family Code 1612(c)).
Is California a community property state?
Yes. Property a spouse acquires during the marriage while living in California is community property under Family Code 760, and Family Code 2550 divides community assets equally unless the spouses agree otherwise in writing.
Does a prenup protect you 100% in California?
No. A court can refuse it for involuntary signing, for unconscionability combined with missing disclosure, or when the 1615(c) findings on counsel and timing are missing. A spousal support term can also fail if it is unconscionable when enforcement is sought.
Prenup Law Next Door in Nevada, Oregon and Arizona
Nevada and Arizona are community property states too, while Oregon divides property by equitable distribution. If one of you lives there, compare that guide.
Sources
California’s Family Code and Court of Appeal opinions back each rule here, with Census and Clio data for the numbers.
- California Family Code, Uniform Premarital Agreement Act (Justia)
- Last v. Superior Court, California Court of Appeal (CourtListener)
- In re Marriage of Zucker, California Court of Appeal (CourtListener)
- Knapp v. Ginsberg, California Court of Appeal (CourtListener)
- In re Marriage of Bonds, 24 Cal.4th 1 (CourtListener)
- In re Marriage of Pendleton & Fireman, 24 Cal.4th 39 (CourtListener)
- U.S. Census Bureau, American Community Survey 1-year estimates
- Clio Legal Trends, lawyer hourly rates in California
- Marriage Science, Do Prenups Hold Up in Court? Appellate study
Not legal advice. This article is general information only. Prenup laws differ by state and change over time. Consult a licensed attorney in your state before acting on anything here.
