- California is an community property state — marital assets are split 50/50 by default.
- Notarization is recommended but not required for prenups in California.
- Witnesses are recommended but not legally required.
- Full financial disclosure by both parties is required by law.
- California requires a 7-day waiting period between final draft and signing.
How California classifies marital property
California is a community property state. All assets and debts acquired during marriage are owned equally by both spouses — 50/50 regardless of who earned the income or holds the title. Separate property owned before marriage, or received as a gift or inheritance, stays yours only if it’s kept clearly segregated from marital funds. California also extends community property rules to registered domestic partnerships. A prenup can specify additional separate property, clarify how appreciation on pre-marital assets is treated, and modify or waive the default 50/50 division.
Understanding California's community property system is critical because a prenup is essentially your opportunity to override these default rules. Without one, everything earned during the marriage is split equally — regardless of who earned it.
The legal framework: UPAA
California has adopted the Uniform Premarital Agreement Act (UPAA), codified as Cal. Fam. Code § 1610-1617. This means prenup formation and enforcement follow a well-established statutory framework shared by 27 other states.
Signing requirements in California
California has specific requirements that must be met for a prenuptial agreement to be valid. Missing any of these can give a court grounds to throw out the entire agreement.
- **Written agreement** — Must be in writing — verbal prenups are not valid
- **Signed by both parties** — Both parties must sign voluntarily before the wedding
- **Notarization recommended** — Not legally required but strongly advised for court enforceability
- **Independent counsel required for support waiver** — If either party waives spousal support, that party must have independent legal counsel or waive the right in writing
- **Full financial disclosure** — Both parties must disclose all assets, debts, and income — incomplete disclosure is the #1 reason prenups are invalidated
- **7-day waiting period** — Final draft must be provided at least 7 days before signing — required by Cal. Fam. Code § 1610-1617
- **State-specific requirement** — Party waiving spousal support must have independent counsel or explicitly waive right to counsel in writing (Fam. Code § 1612(c))
- **State-specific requirement** — Applies to registered domestic partnerships
Spousal support in a California prenup
California allows spousal support waivers, but with an important condition: the waiving party must have independent legal counsel at the time of signing, or must explicitly waive that right in writing (Family Code § 1612(c)). Courts can also override the waiver at divorce if enforcing it would be unconscionable. Clause walks California couples through these requirements automatically.
Key case law: In re Marriage of Pendleton & Fireman (2000)
The California Supreme Court held that a premarital agreement waiving spousal support is enforceable when the waiving party was represented by independent legal counsel at the time of signing. This case confirmed that California’s 7-day waiting period and counsel requirements exist to protect the waiving party’s informed consent.
What this means for your prenup: Clause walks California couples through the 7-day waiting period requirement and flags when independent counsel is needed for a support waiver, reducing the risk of invalidity at enforcement.
Sunset clauses and special provisions
California courts will enforce sunset clauses — provisions that cause the prenup to expire after a set number of years. If you want the agreement to remain in effect indefinitely, make sure to exclude a sunset clause or explicitly state that the agreement has no expiration.
Build your California prenup on Clause
Clause generates a legally valid, California-specific prenuptial agreement starting at $549 — a fraction of the $5,000–$20,000 that traditional attorney-drafted prenups cost in California. The Agreement Builder automatically handles California's signing requirements, and financial disclosure obligations. Attorney review and online notarization are available as add-ons.
Clause is not a law firm and this article is not legal advice. For guidance specific to your situation, consult a licensed family law attorney in California.