Prenuptial Agreements and Divorce Mediation in California

If you and your spouse signed a prenup and are now considering divorce mediation, the prenup does not replace mediation. It becomes one of the documents you work from. Terms it clearly settles can be confirmed in your agreement. Issues it leaves open are worked through together. Financial disclosure is still required, and the mediator does not rule on whether the prenup holds.

Maybe one of you sees it as settling everything. Maybe the other is unsure it was ever fair. Both of you may be wondering whether mediation can work with that document on the table. This explainer walks through what a prenup is under California law and when courts enforce one. It then covers how mediation handles a prenup, whether you and your spouse are in San Diego County or mediating online from anywhere in California.

What a Prenuptial Agreement Does Under California Law

A prenuptial agreement, also called a premarital agreement, is a contract two people sign before they marry that takes effect when they marry. In California it is governed by the Uniform Premarital Agreement Act, Family Code sections 1600 through 1617. Those sections are written for agreements made before marriage. An agreement signed during marriage, often called a postnuptial agreement, follows different rules.

Two property terms come up again and again. Community property is generally property either spouse acquired during the marriage. Separate property is generally property a spouse owned before the marriage, or received during it as a gift or inheritance. Much of what a prenup does is change how property would otherwise be sorted into those two groups.

Under Family Code section 1612(a), the parties may contract about each of these subjects:

• the rights and obligations of each party in any property of either or both of them, wherever and whenever acquired
• the right to buy, sell, use, transfer, mortgage, manage, control, or otherwise deal with property
• what happens to property on separation, divorce, death, or another event
• making a will, trust, or other arrangement to carry out the agreement
• ownership of a life insurance death benefit
• which state's law governs the agreement
• any other matter, including personal rights and obligations, that does not violate public policy or a criminal statute

There are firm limits. Under section 1612(b), "the right of a child to support may not be adversely affected by a premarital agreement." Spousal support terms carry their own conditions, covered in the next section. Under Family Code section 1611, "a premarital agreement shall be in writing and signed by both parties." It is enforceable without consideration, which means neither person had to give anything extra in exchange for signing.

When a California Court Will — and Will Not — Enforce a Prenup

A prenup is not automatically enforced. Under Family Code section 1615(a), a premarital agreement is not enforceable if the party against whom enforcement is sought proves either that they did not execute it voluntarily, or that it was unconscionable when it was executed and, before execution, all of the following applied to that party: they were not provided a fair, reasonable, and full disclosure of the other party's property or financial obligations; they did not voluntarily and expressly waive, in writing, any right to disclosure beyond the disclosure provided; and they did not have, or reasonably could not have had, an adequate knowledge of the other party's property or financial obligations.

Voluntariness has specific statutory requirements. Under Family Code section 1615(c), a prenup "shall be deemed" not executed voluntarily unless the court finds, in writing or on the record, a set of conditions that includes these:

• The spouse opposing enforcement was represented by independent legal counsel at signing. Or, after being advised to seek independent counsel, that spouse expressly waived representation in a separate writing. The advisement must come at least seven calendar days before the final agreement is signed.
• The seven-calendar-day rule was met. For agreements signed on or after January 1, 2020, that spouse had at least seven calendar days between first seeing the final agreement and signing it. This applies "regardless of whether the party is represented by legal counsel." For agreements signed between January 1, 2002, and January 1, 2020, the seven days ran from when the spouse was first presented with the final agreement and advised to seek independent counsel. For both versions, the requirement does not apply to nonsubstantive amendments that do not change the terms of the agreement.

Spousal support provisions face a separate test. Under section 1612(c), a spousal support term, including a waiver, is not enforceable if the spouse it is being enforced against was not represented by independent counsel when the agreement was signed. Section 1612(c) also makes a spousal support term unenforceable if it is unconscionable at the time of enforcement, and says an otherwise unenforceable term may not become enforceable solely because the party against whom enforcement is sought was represented by independent counsel.

How Mediation Works When a Prenuptial Agreement Exists

Under Evidence Code section 1115, mediation is "a process in which a neutral person or persons facilitate communication between the disputants to assist them in reaching a mutually acceptable agreement." The mediator is that neutral person. The mediator does not represent either of you, does not advocate for either of you, and does not decide anything for you. That includes whether your prenup is enforceable.

With a prenup in the picture, mediation usually sorts issues into three groups:

1. Issues the prenup clearly resolves. If you both read a term the same way, you can confirm it in your settlement agreement.
2. Issues the prenup leaves open. These are worked through in mediation under the ordinary California rules.
3. Issues where one of you questions the prenup. Mediation can help you explore whether you can agree on how to treat a disputed term. You might honor it, adjust it, or set it aside by agreement. The mediator does not rule on it.

Either of you may consult or retain your own attorney at any point. Neither of you is required to. Independent advice can matter most where enforceability is in question. If there has been domestic violence, coercion, or a protective order, safety comes first. The guide on when mediation is not appropriate covers those situations.

Disclosure does not go away. Mediation does not remove the duty of financial disclosure, and neither does a prenup. Under Family Code section 2104(f), each spouse serves a preliminary declaration of disclosure with the petition or response, or within 60 days of filing it. You and your spouse can extend that time by written agreement, or the court can extend it by order. If the petitioner served by publication or posting under a court order, and the respondent files a response before a default judgment, the petitioner has 30 days from that response. Under Family Code section 2105(a), the final declaration of disclosure and a current income and expense declaration are generally due before or at the time you agree on property or support issues other than temporary support. If the case goes to trial, they are due no later than 45 days before the first assigned trial date. A court can order otherwise for good cause. Any waiver of the final declaration must be mutual. Under section 2105(d), it is executed under penalty of perjury in open court or by separate stipulation. It must include the listed representations, among them that both of you have complied with section 2104 and exchanged preliminary declarations.

Confidentiality has limits. Under Evidence Code section 1119, what is said and written in mediation is generally confidential, except as the Evidence Code's mediation chapter otherwise provides. It is not absolute. Under Evidence Code section 1123, a written settlement agreement signed by both spouses can be admitted or disclosed if any of these is true:

• it says it is admissible or subject to disclosure
• it says it is enforceable or binding
• all parties expressly agree to its disclosure
• it is used to show fraud, duress, or illegality relevant to an issue in dispute

The overview of divorce mediation agreements explains how that written agreement comes together.

Property, Support, and What the Prenup May — or May Not — Have Settled

Without a prenup, Family Code section 2550 directs the court to divide the community estate equally. The exceptions include a written agreement of the parties and an oral stipulation in open court. A prenup can change that default by labeling certain property separate or by setting a different division. If the prenup does that and is enforceable, mediation works from those terms. For assets it does not cover, the general rules apply. Property division mediation covers those rules in more depth.

Valuation follows its own rule. Under Family Code section 2552, the court values community assets and debts as near as practicable to the time of trial. For good cause, on 30 days' notice by the moving party, the court may use a date after separation and before trial. Property is not automatically valued as of the date you separated.

Separate-property reimbursement. Under Family Code section 2640(b), a spouse who contributed separate-property money to acquire community property is generally reimbursed, to the extent the contribution is traced to a separate source. Qualifying contributions are downpayments, payments for improvements, and payments that reduce the principal of a loan used to buy or improve the property. Interest, maintenance, insurance, and taxes do not count. Reimbursement is not owed if the spouse made a written waiver or signed a writing with that effect. It is paid without interest or adjustment for change in monetary values. It cannot exceed the property's net value at the time of division.

The Moore/Marsden apportionment runs the other way. It applies when community money pays down a loan on one spouse's separate-property home. In that case, the community may acquire a proportional interest in that home. A prenup may speak to either situation, which is one reason its exact language matters.

Spousal support. A prenup may limit or waive spousal support only if its support terms satisfy the section 1612(c) conditions described in the enforceability section. If a support term does not meet them, or the prenup is silent, you negotiate support in mediation under the general Family Code framework. The guide to spousal support mediation walks through that.

Businesses and retirement. A business's value can include goodwill. Its value is decided on the evidence, often with the help of experts. For retirement plans, Family Code section 2610 directs the court to make orders that give each spouse a full community share, except as subdivision (b) provides. A prenup may address whether retirement savings built before or during marriage are separate or community.

Children. Under Family Code section 1612(b), the right of a child to support may not be adversely affected by a premarital agreement. Parents may agree on child support, but the agreement is subject to the court's approval. Under Family Code section 4065(a), the court will not approve an amount below the guideline formula unless the parents declare all of the following:

• they are fully informed of their rights
• the order is agreed to without coercion or duress
• the agreement is in the children's best interests
• the children's needs will be adequately met
• the right to support has not been assigned to the county, and no public assistance application is pending

Child support mediation explains how those declarations fit into the process.

The Six-Month Waiting Period and How the Divorce Process Proceeds

California sets a minimum waiting period before a divorce is final. Under Family Code section 2339, a judgment does not end the marriage until six months have passed from one of two dates, whichever comes first. One is the date the summons and petition are served. The other is the date the respondent appears in the case. The period does not run from filing. The court may extend it for good cause, and the rule is also subject to Family Code sections 2340 to 2344.

Mediation can begin, and you can reach a settlement agreement, before the six months are up. The marriage simply does not end until the waiting period has passed. If you resolve some issues and not others, a partial agreement in mediation can put the settled terms in writing.

For couples in San Diego County, family law cases are heard by the Superior Court of California, County of San Diego. Where your case is filed, and which rules apply, depend on your circumstances, including where you and your spouse live. The California Courts' self-help divorce resource explains the general court steps.

To Talk With Simple Divorce Mediation About Mediation and a Prenup

A prenup can make some parts of a divorce clearer and leave others more uncertain than either of you expected. Much turns on what the document actually says and how it was signed. A consultation is a place to raise those questions. The mediator will not decide whether the prenup holds; that question stays with you, your own advisers if you choose them, and the court.

Whether you are in San Diego County or elsewhere in California and mediating online, you can call Simple Divorce Mediation at 858-330-1378 to arrange a joint mediation consultation whenever it suits you both.

About this article. Reviewed by Amy J. Lass, CA Bar No. 246779. Last updated 2026-10-08.