A prenuptial agreement can help a couple decide how certain financial issues will be handled before marriage. It is not simply a list of who owns what today. The agreement may affect property management during marriage and the treatment of assets, debts, or support if the marriage ends, so the drafting process matters as much as the final document.
What is a prenuptial agreement in California?
California Family Code section 1610 defines a premarital agreement as an agreement between prospective spouses made in contemplation of marriage and intended to take effect upon marriage. Section 1611 requires it to be in writing and signed by both parties. Section 1613 states that it becomes effective when the marriage occurs.
That timing distinguishes a prenup from an agreement negotiated after the wedding. If future spouses marry before the document is completed, they should not assume that simply signing the same draft later produces the same legal result. Under section 1614, after marriage the spouses may amend or revoke a premarital agreement only through a written agreement signed by both parties; no consideration is required. Other postmarital agreements require separate legal analysis.
What can a California prenup cover?
Under Family Code section 1612, prospective spouses may make agreements about rights and obligations in property, how property may be managed or transferred, and how property will be handled upon separation, divorce, death, or another stated event. The statute also permits provisions involving wills, trusts, life-insurance death benefits, choice of law, and other matters that do not violate public policy or a criminal statute.
The agreement should identify assets and obligations clearly enough that both people understand what is being addressed. Depending on the couple, that may include a home, business interests, investment accounts, retirement benefits, expected inheritances, existing debt, or how future earnings will be characterized.
A prenup is not unlimited. Section 1612 states that a child's right to support may not be adversely affected. A spousal-support provision, including a waiver, is not enforceable against a person who was not represented by independent counsel when signing the agreement, or if the provision is unconscionable when enforcement is sought.
What is California's seven-day rule for prenups?
For agreements signed on or after January 1, 2020, Family Code section 1615 generally requires the party against whom enforcement is later sought to have at least seven calendar days between first receiving the final agreement and signing it. The statute says this timing rule applies regardless of whether that person has a lawyer. Nonsubstantive amendments that do not change the agreement's terms are treated differently under the statute.
The same section separately says the advice to seek independent legal counsel must be given at least seven calendar days before the final agreement is signed. Treating seven days as a drafting target is risky. A late rewrite can create a new timing question, and a compressed schedule can make voluntary review harder to demonstrate.
Why does financial disclosure matter?
A court may find a prenup unenforceable if it was unconscionable when signed and the person challenging it was not given fair, reasonable, and full disclosure of the other person's property or financial obligations, did not voluntarily waive additional disclosure in writing, and did not have or reasonably could not have had adequate knowledge of those finances.
Practical disclosure may involve current statements and records for real estate, businesses, bank and investment accounts, retirement assets, compensation, loans, tax obligations, and other material interests. The appropriate scope depends on the circumstances. A schedule attached to the agreement is only useful if it is complete enough for informed review.
California's default property rules remain important context. California Courts explains that property and debt acquired during marriage are generally treated as community property, while property owned before marriage and individual gifts or inheritances are generally separate. Our guide explains how California community property works when no enforceable agreement changes the analysis.
Do both people need their own lawyer?
Section 1615 ties voluntary execution to independent legal counsel or, after advice to obtain counsel, an express waiver made in a separate writing. It adds written-information requirements when the party against whom enforcement is sought was unrepresented. Section 1612 applies an even stricter rule to spousal-support provisions: lack of independent counsel can make that provision unenforceable against the unrepresented person.
One lawyer should not be expected to advise both future spouses about competing rights. Separate review gives each person a chance to ask confidential questions, understand what would otherwise happen under California law, and propose revisions before signing.
When can a California prenup be challenged?
Family Code section 1615 provides two principal enforceability routes: the challenging party may prove that the agreement was not executed voluntarily, or may prove that the agreement was unconscionable when executed and, before signing, that person was not given fair, reasonable, and full financial disclosure, did not voluntarily and expressly waive additional disclosure in writing, and did not have and reasonably could not have had adequate knowledge of the other party's property or financial obligations. Whether an agreement was unconscionable is decided by the court as a matter of law. The statute also directs courts considering voluntariness to address counsel or waiver, timing, information provided to an unrepresented party, duress, fraud, undue influence, capacity, and other relevant factors.
A disagreement at divorce does not automatically invalidate an agreement, and a signed document is not automatically beyond challenge. Enforcement depends on the actual terms, process, evidence, and law applicable to that agreement.
How should a couple prepare for a prenuptial agreement?
- Start well before the wedding. Allow time for disclosure, separate advice, negotiation, and a stable final draft.
- Identify the purpose. Decide which property, debt, business, estate-planning, or support questions require clear terms.
- Exchange meaningful financial information. Preserve the schedules and records used during review.
- Use independent counsel. Each future spouse should understand the agreement and the rights affected before signing.
- Keep the completed record. Retain the signed agreement, disclosure materials, waivers, and related written explanations.
Mahdavi & Mahdavi Family Law advises clients in Ventura and Los Angeles Counties on California family-law and property division issues. A consultation can help identify which terms need attention and what information should be gathered before an agreement is drafted or signed.
This article provides general California family-law information, not legal advice for a particular agreement. Current law and the specific facts should be reviewed by qualified counsel.
