California Prenuptial Agreement
California prenuptial agreements are governed by California Family Code §§ 1610–1617. Courts apply dual review — unconscionability is assessed at both signing and divorce — and California adds two unusual requirements: independent legal counsel is mandatory for any spousal support provisions, and a seven-day waiting period must pass between the final draft and signing.
Bottom line: California earns a C- grade. Dual review, mandatory counsel, a strict waiting period, and unpredictable spousal support scrutiny make California one of the harder states for prenup enforceability. A prenup is still far better than none.
California Prenup Enforceability Rating: C
California Prenup Laws: Key Statutes Explained
California Family Code §§ 1610-1617
Separate Property
All assets can remain separate property, avoiding costly divorce settlements. Joint assets and debts titled in both names are split 50/50 as marital property.
Unconscionability at Execution AND Enforcement
Courts review unconscionability at execution (signing) AND enforcement (divorce), requiring a high level of alimony for a prenup to be enforceable. Marriage of Zucker (2022) rejected a prenup that paid the wife $6,000/month because she enjoyed a $60,000/month lifestyle during marriage. 10% was found too little, we think courts might accept 25-50% of statutory amounts (10-20% of payor’s income), but it remains at a judge’s discretion. If they disagree, the alimony modification will be rejected and the full statutory amount will apply (40% of payor’s income - 50% of recipient’s).
Timing
Mandatory seven-day waiting period between presentation of the final agreement and signing. We recommend signing 60+ days before the wedding with 10+ days to review. Reach out to an attorney 4-6 months before the wedding with your PerfectPrenup draft.
Independent Counsel
Independent counsel is REQUIRED. Spousal support waivers or limitations are unenforceable without independent counsel, regardless of fairness.
Financial Disclosure
"Full disclosure" of assets, debts and income is required, and waivers are heavily scrutinized. Disclose all assets over $1,000 so they aren’t split 50/50 later. PerfectPrenup includes a disclosure waiver, but don’t rely on it alone as California courts have a hostile approach to prenups.
Low Burden to Challenge
Challenging party bears burden of proof, but many avenues to invalidate: dual-review unconscionability for spousal support (execution AND enforcement), strict seven-day waiting period with no substantive changes, mandatory independent counsel for any spousal support provisions, full disclosure requirements heavily scrutinized, and no clear threshold for acceptable support levels (10% of statutory rejected too low). California is hostile to prenups, but the only thing worse would be to marry without one.
Child Support
Child support and custody clauses are unenforceable and could undermine the entire agreement. Do not include.
California Prenuptial Agreement Court Cases
California courts consistently invalidate prenups with large income/asset disparities and spousal support waivers that leave one spouse unable to maintain reasonable lifestyle, while upholding prenups between parties with similar financial positions.
In re Marriage of Zucker (2022) 75 Cal.App.5th 1025
Court struck down $6,000/month spousal support cap as unconscionable when husband earned $250,000/month—merely 10% of probable statutory award deemed "oppressive."
In re Marriage of Facter (2013) 212 Cal.App.4th 967
Complete spousal support waiver invalidated when attorney husband ($1M/year, $10M+ assets) divorced unemployed high school graduate wife with no assets after 16-year marriage due to "dramatic disparity" and "inequality of bargaining power", while asset separation upheld.
In re Marriage of Miotke (2019) 35 Cal.App.5th 849
Mutual spousal support waiver enforced when both spouses had similar earning histories and wife had $107,000 net worth at signing despite not working at that time.
In re Marriage of Howell (2011) 195 Cal.App.4th 1062
Pre-2002 spousal support waiver upheld because 2002 Family Code amendments requiring independent counsel for support provisions were not applied retroactively.
In re Marriage of Cadwell-Faso (2011) 191 Cal.App.4th 945
Prenup signed 6 days (not 7) after final draft upheld when both parties represented by counsel throughout months-long negotiations—holding later prospectively superseded by AB1380 (2020).
In re Marriage of Hill & Dittmer (2011) 202 Cal.App.4th 1046
Prenup upheld against claims of fraudulent disclosure when evidence showed valid waiver and months-long negotiation period.
Last v. Superior Court (2023) Case No. G060943
Prenups are presumed involuntary and unenforceable unless trial court makes written findings that all Family Code §1615(c) requirements were satisfied.
In re Marriage of Clarke & Akel (2018) 19 Cal.App.5th 914
Seven-day waiting period begins when spouse receives the final draft of prenuptial agreement.
5-Step Checklist: How to Sign & Execute a Prenup in California
Step 1: Download and read the California prenuptial agreement
Start with our free template, written for California-specific statutes and case law under California Family Code §§ 1610–1617. Read it in full. The 15+ pages include provisions to opt out of California's community property default and rebuttals to common legal challenges. Pay close attention to the spousal support section — it's the clause California courts attack most aggressively.
Step 2: Draft changes on your own
See a clause you don't like? Copy it into an AI like Claude, explain what you'd like to change, and save any edits as a separate version — don't overwrite the original. Bring both to your attorney review. Note: AI is often gender-biased and crafts terms beyond what is legally required. Push back on its output.
Step 3: Find a family law attorney in California — both of you
Independent counsel is legally required for any spousal support provision to be enforceable under Family Code § 1612(c). Find separate attorneys. Avvo, Findlaw, and Justia are good starting points. Look for 10+ years of California family law experience. Contact attorneys 6+ months before the wedding — California's procedural requirements take time to satisfy correctly.
Step 4: Finalize the agreement at least 7 days before signing
Our recommendation: sign the prenup before proposing. That way, you both get the legal work out of the way, and you know if this is someone you really want to marry. Already proposed? California law requires a mandatory 7-calendar-day waiting period between delivery of the final agreement and signing (Family Code § 1615(c)(2)(B), as amended by AB 1380, effective January 1, 2020). No substantive changes are permitted during that window — the clock restarts if terms change. We recommend delivering the final draft 10+ days before signing and signing 60+ days before the wedding.
Step 5: Sign with both attorneys present and store the agreement
Execute with both attorneys present — their presence is documented evidence of voluntariness and required for spousal support modifications. Under Last v. Superior Court (2023), a prenup is presumed unenforceable unless a court makes written findings that all § 1615(c) requirements were satisfied (both parties represented or counsel waived in writing; 7-day waiting period observed; unrepresented party fully informed in writing; no duress, fraud, or undue influence; parties had capacity to contract). Each party keeps a signed original; each attorney keeps a copy. Store yours in a safe deposit box and save a PDF to a backup drive.
California Prenuptial Agreement: Frequently Asked Questions (2026)
What is a prenuptial agreement?
A legal contract signed before marriage that determines how assets, debts, and finances are handled if the marriage ends. In California — a community property state — without a prenup, everything earned or acquired during the marriage is split 50/50 at divorce. A prenup lets both parties opt out of that default. Our template keeps assets and debts separate unless held jointly, structures spousal support to reward longer marriages rather than incentivize divorce, and routes disputes to mediation or arbitration.
How much does a prenup cost in California?
Attorney-drafted from scratch: $2,500–$10,000+ per side. Because independent counsel is legally required for spousal support provisions, you can't skip attorneys entirely — but starting with our free template should bring the bill to around $750–$1,500 per side.
Are prenups enforceable in California?
Yes, but California earns a C rating — one of the harder states to enforce a prenup in. Courts review unconscionability twice: at signing and again at divorce. A prenup is still far better than no prenup, so just make sure you have an attorney review it, which is mandatory in California.
What makes a prenup invalid in California?
The most common reasons: missing the 7-day waiting period, no independent counsel for spousal support provisions (Facter), support set so low it's unconscionable at divorce (Zucker — $6,000/month struck when husband earned $250,000/month), and incomplete financial disclosure. Leave out child custody and support entirely — including them risks tainting the rest of the agreement.
Do I need a lawyer to get a prenup in California?
Yes — effectively. Independent counsel is required by statute for any spousal support clause to be enforceable (Family Code § 1612(c)). A party can waive counsel in writing, but that waiver must itself be voluntary, fully explained, and memorialized in a signed declaration. In practice, both sides having separate attorneys is far cleaner.
What should a California prenuptial agreement include?
Our California template is built around six core principles:
- Separate property — assets and debts stay with the party who acquired them, minimizing conflict
- Joint assets and debts — anything both parties sign for together is split 50/50
- Marital home — ownership is tracked as a percentage of contribution, so each party gets back what they put in
- Spousal support — structured to incentivize larger families and longer marriages, not divorce
- Full financial disclosure — all assets, debts, and income over $1,000, listed in the exhibits, satisfying California Family Code § 1615(a)(2)(A)
- Privacy clause — keeps financial and personal details out of public record, supporting a trusting relationship
Leave out child custody and support entirely — California won't enforce them and they can invalidate the rest of the agreement.
Does California's community property law affect my prenup?
Yes — it's the primary reason California couples need a prenup. Without one, all income earned and assets acquired during marriage are split 50/50 at divorce, including salary, business growth, retirement contributions, and your spouse's debts. A properly drafted prenup will opt both parties out of community property entirely.
How far in advance should I get a prenup in California?
Sign 60+ days before the wedding, with your spouse receiving the final draft at least 10 days before signing. Contact attorneys 6+ months before the wedding. Best practice: sign before proposing — no time pressure, and you'll know if this is the right person to really move forward with marriage.
What is California's 7-day rule?
Under Family Code § 1615(c)(2)(B), the party signing must have at least 7 calendar days between receiving the final agreement and signing it. AB 1380 (effective January 1, 2020) tightened this rule — it now applies even when both parties have counsel, and no substantive changes are permitted during the waiting period. The clock resets if terms change and starts upon actual receipt of the final draft (Clarke & Akel, 2018).
Can a spousal support waiver be challenged in California?
Yes — aggressively. Support provisions face dual unconscionability review: fair at signing AND at divorce. Zucker (2022) struck a $6,000/month cap when the husband's income increased significantly during marriage. Facter (2013) invalidated a full waiver after a 16-year marriage with a large income disparity. Miotke (2019) enforced a mutual waiver where both spouses had comparable earning histories. The pattern: courts enforce support modifications when both parties were on roughly equal financial footing at signing; they strike them when the disparity is large and the spousal support was not dynamic.