When You Are Asked to Sign a Prenup

What a Prenuptial Agreement Does Under California Law

A prenuptial agreement, which California's statutes call a premarital agreement, is "an agreement between prospective spouses made in contemplation of marriage and to be effective upon marriage" (Family Code section 1610). It must be in writing and signed by both people (Family Code section 1611). The rules for these agreements sit in the Uniform Premarital Agreement Act, Family Code sections 1600 through 1617, and the section that matters most to the person asked to sign is Family Code section 1615, which sets out when an agreement can be refused enforcement.

The reason a prenup exists at all is that the property rights the law gives spouses "may be altered by a premarital agreement or other marital property agreement" (Family Code section 1500). Without an agreement, California's default rules apply. In plain terms, separate property is generally what a person owns before marriage, or receives during marriage as a gift or inheritance. Community property is generally what either spouse earns or acquires during the marriage, which the law treats as belonging to both. A prenup can change how those labels apply to a particular couple.

Under Family Code section 1612(a), the parties may contract about:

• each party's rights in property of either or both of them, "whenever and wherever acquired or located";
• the right to buy, sell, use, transfer, lease, mortgage or otherwise manage and control 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 how the agreement is read; and
• any other matter, including personal rights and obligations, that does not violate public policy or a statute imposing a criminal penalty.

The agreement takes effect only on marriage (Family Code section 1613). If the wedding never happens, the agreement does not take effect. If a marriage is later found void, the agreement is enforceable only to the extent needed to avoid an inequitable result (Family Code section 1616).

If a signed prenup is ever disputed in a San Diego County divorce, the dispute is heard by the Superior Court of California, County of San Diego. The court files family cases by ZIP code under its ZIP Code List (ADM-254), across four divisions: the Central Courthouse at 1100 Union Street, San Diego, CA 92101; the North County Regional Center at 325 South Melrose Drive, Vista, CA 92081; the East County Regional Center at 250 East Main Street, El Cajon, CA 92020; and the South County Regional Center at 500 3rd Avenue, Chula Vista, CA 91910. Whichever courthouse hears the case, the same California rules described here govern.

The Seven-Day Rules: Time You Have Before Signing

Family Code section 1615(c) builds in two separate waiting periods, and each one protects the person being asked to sign. They are easy to blur together, so it helps to take them one at a time.

The first concerns advice to get a lawyer. Family Code section 1615(c)(1) states: "The advisement to seek independent legal counsel shall be made at least seven calendar days before the final agreement is signed." This clock starts when the signing party is told to get their own attorney.

The second concerns the document itself. For agreements signed on or after January 1, 2020, Family Code section 1615(c)(2)(B) requires that the party "had not less than seven calendar days between the time that party was first presented with the final agreement and the time the agreement was signed, regardless of whether the party is represented by legal counsel." This clock starts when the final agreement is put in front of the signing party. The statute adds that it does not apply to nonsubstantive amendments that do not change the terms of the agreement.

So there are two clocks: one for the advice to get counsel and one for having the final version in hand. The words "final agreement" matter. A draft still under negotiation, or one with blanks where numbers or assets belong, is not the final agreement. When terms change in a substantive way, the version that will actually be signed is the one the second clock measures from.

These rules carry real weight. Under section 1615(c), a premarital agreement is deemed not to have been signed voluntarily unless the court finds, in writing or on the record, that the listed requirements were met, including both seven-day periods. That is why the timing of a prenup's delivery, often a week or two before a wedding, is something attorneys look at closely.

Independent Legal Counsel: What It Means and Why It Matters

Independent legal counsel means an attorney who represents only the person signing, not the lawyer who drafted the agreement for the other side. Under Family Code section 1615(c)(1), the court looks for one of two things: the signing party was represented by independent counsel when signing, or, after being advised to seek independent counsel, expressly waived that representation in a separate writing. The advice itself must come at least seven calendar days before signing, as described above.

A person may choose not to hire a lawyer. The law allows that. But going without one triggers an added protection. Family Code section 1615(c)(3) requires that an unrepresented party "was fully informed of the terms and basic effect of the agreement as well as the rights and obligations the party was giving up by signing the agreement." It goes on: "The explanation of the rights and obligations relinquished shall be memorialized in writing and delivered to the party prior to signing the agreement."

The same subdivision requires that the unrepresented party was proficient in the language in which the explanation was given and in which the agreement was written. This is a statutory requirement, not a courtesy. The unrepresented party must also sign a document, on or before signing the prenup, declaring that they received this information and naming who provided it.

Someone signing alone may feel these steps are paperwork. Their practical significance is larger. If the advisement, the separate written waiver or the written explanation is missing, the agreement is open to the argument that it was not signed voluntarily. Lack of independent counsel also matters directly for spousal support terms, covered below.

Grounds for Challenging a Prenup in California

Family Code section 1615(a) states that a premarital agreement "is not enforceable if the party against whom enforcement is sought proves either of the following." That wording places the burden of proof on the person challenging the agreement. There are two grounds.

The first is that the party did not sign voluntarily. Here the seven-day rules, the counsel advisement and the written explanation for an unrepresented party all come into play, because section 1615(c) ties voluntariness to them. Section 1615(c)(4) also requires a finding that the agreement and the related writings were not signed under duress, fraud or undue influence, and that neither party lacked capacity. Duress means pressure that overrides a person's free choice; undue influence means one person taking unfair advantage of another's trust or weakness. Section 1615(c)(5) lets the court weigh any other factors it considers relevant. An agreement presented days before the wedding, with no real chance to review it or reach a lawyer, is the kind of circumstance these provisions are written to catch.

The second ground combines unfairness with missing financial information. Unconscionable means so one-sided and unfair that it shocks the conscience, the kind of term no reasonable person would agree to under fair conditions. Under section 1615(a)(2), the agreement must have been unconscionable when signed, and before signing all three of these must have applied to the challenging party:

• they were not given 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 what was provided; and
• they did not have, or reasonably could not have had, adequate knowledge of the other party's property or financial obligations.

Under section 1615(b), unconscionability is decided by the court as a matter of law. A prenup that hides assets or debts is exposed to this challenge, but the statute requires the combination above, not concealment alone. Separately, section 1617 tolls (pauses) any statute of limitations on claims under the agreement during the marriage, though defenses based on delay, such as laches and estoppel, remain available.

What a Prenup Cannot Take Away

Family Code section 1612(b) is short and direct: "The right of a child to support may not be adversely affected by a premarital agreement." Whatever two adults agree about their own finances, they cannot bargain away a child's support.

The catch-all in section 1612(a)(7) also has a limit built in. The parties may cover other matters only if those terms are "not in violation of public policy or a statute imposing a criminal penalty." A prenup cannot require something illegal.

Spousal support, the payments one spouse may owe the other after separation, receives its own rule. Under Family Code section 1612(c), any spousal support provision, including a waiver, "is not enforceable if the party against whom enforcement of the spousal support provision is sought was not represented by independent counsel at the time the agreement containing the provision was signed, or if the provision regarding spousal support is unconscionable at the time of enforcement." Two points follow. A support waiver signed without independent counsel cannot be enforced against that person. And even with counsel, a support term is tested again for unconscionability when someone tries to enforce it, which may be many years later. The statute also says having counsel does not, by itself, make an otherwise unenforceable support provision enforceable.

A common worry is the prenup "where one spouse gets nothing." A prenup can keep each person's separate property separate, and it can also change how property acquired during the marriage is treated, if the agreement validly addresses it. What it cannot do is escape the voluntariness and disclosure protections of section 1615, the child support rule, or the spousal support limits of section 1612(c). A very lopsided agreement draws scrutiny under those rules.

How to Respond When You Are Asked to Sign

Receiving a prenup starts a process; it does not set a deadline. The seven-day rules in section 1615(c) exist to create space for review, and that space belongs to the person asked to sign. Someone in the middle of wedding planning may feel there is no room to slow down, but the law assumes there will be.

Reading the agreement closely is usually where people begin. Useful questions include which property it labels separate, whether it changes the treatment of earnings during the marriage, what it says about spousal support, and whether any terms end or change after a set number of years or on some event. It also helps to check whether a financial disclosure from the other party is attached, and what it lists.

Consulting an independent attorney before signing is the step section 1615(c)(1)'s advisement is built to allow. An attorney licensed in California and familiar with practice in the Superior Court of California, County of San Diego, can review the draft and explain its effect under California law.

Negotiating is also open. A prenup is a contract, and its terms can be discussed, revised and rebalanced before anyone signs. After the wedding, changing it requires a written agreement signed by both spouses (Family Code section 1614), so the period before signing is often when changes are simplest.

Declining is an option too. California law does not require anyone to sign a premarital agreement, and voluntariness is the foundation of the whole framework in section 1615.

Do Prenups Hold Up in Court in California?

California enforces premarital agreements that meet the requirements of the Uniform Premarital Agreement Act. A prenup is not suspect simply because it exists; section 1612 expressly allows couples to contract about a wide range of property matters.

Challenges tend to center on the same few issues: the seven-day periods were not observed, the counsel advisement was missing or late, the unrepresented party received no written explanation, financial disclosure fell short, or a term is unconscionable. Because section 1615(c) asks what happened before signing, courts look at the circumstances of signing, not only the text of the document. The court must make its findings on voluntariness in writing or on the record.

Timing cuts both ways. An agreement properly signed can still have its spousal support term refused if that term is unconscionable at the time of enforcement under section 1612(c). On the other hand, the statute's test is unconscionability and the specific disclosure failures in section 1615(a)(2), not simply whether one person came out ahead. A deal that favors one side is not, for that reason alone, unenforceable. How any particular agreement fares depends on its facts and on the evidence, and no outcome is assured either way.