Changing or Revoking a Prenup

Before You Start: What California Law Allows

Family Code section 1500 sets the foundation: "The property rights of spouses prescribed by statute may be altered by a premarital agreement or other marital property agreement." California's default property rules apply to a marriage unless the spouses agree otherwise in writing. A prenup is one such written agreement. California law calls it a "premarital agreement," meaning an agreement between people about to marry, made in contemplation of the marriage and effective once they marry (Family Code section 1610).

Family Code section 1614 is the rule for changing that agreement once the couple is married. Its text reads: "After marriage, a premarital agreement may be amended or revoked only by a written agreement signed by the parties. The amended agreement or the revocation is enforceable without consideration."

Two points in that sentence matter most:

• The writing-and-signature rule. An oral agreement does not change a prenup, and neither does a course of conduct. A signed writing from both spouses is the threshold.
• No consideration. In ordinary contract law, "consideration" means something of value each side gives in exchange, such as money, property or a promise. Many contracts fail without it. Section 1614 removes that requirement. The amendment or revocation is enforceable even if neither spouse gives the other anything in return. The original prenup worked the same way (Family Code section 1611).

The statute names two paths. Amendment changes particular terms. Revocation cancels the agreement. The statutes do not add a filing step, a form, or a waiting period to section 1614 itself. Anything beyond the signed writing comes from the enforceability rules discussed in the steps below.

Step 1: Decide Whether You Are Amending or Revoking

The first decision is whether the change is partial or total, because that choice shapes everything the new document has to say.

Amendment modifies one or more specific terms and leaves the rest of the prenup in force. A couple might revise how a particular asset is treated, change a provision about earnings during the marriage, or update terms that no longer fit their circumstances. Every provision the amendment does not touch keeps operating as written.

Revocation cancels the entire premarital agreement. Section 1500 explains the effect. The prenup was the written agreement that altered the spouses' statutory property rights. Once it is revoked, those statutory rules, including California's community property rules, govern instead. "Community property" is, in general terms, the property the default rules treat as belonging to both spouses together. A couple considering revocation is in effect choosing to let California's default system apply going forward.

Both paths run through the same door. Section 1614 requires a written agreement signed by both parties whether the change is one sentence or the whole document. The practical difference is in the drafting. An amendment has to fit cleanly against the original text, so the old and new provisions do not contradict each other. A revocation has to be unmistakable about what it cancels. Some couples find, once they work through the original agreement, that the change they had in mind is larger or smaller than they first thought. That realization usually comes in this step.

Step 2: Understand the Independent-Counsel Requirement

Family Code section 1615 sets the enforceability standards for premarital agreements. It lists the grounds on which a spouse can later avoid an agreement. Section 1615 is written for the original prenup. The statutes do not say in so many words whether every item on its checklist applies to a later amendment or revocation. Because the amendment changes that same premarital agreement, a careful amendment is prepared so it would also meet section 1615's standards, alongside the section 721 duty described below.

Under section 1615(a), a premarital agreement is not enforceable if the spouse against whom it is enforced proves either of two things:

1. That spouse did not sign it voluntarily.
2. The agreement was unconscionable when signed, and that spouse lacked fair, reasonable and full disclosure of the other's property and financial obligations, did not waive further disclosure in writing, and did not have adequate knowledge of them. "Unconscionable" here means so unfair that a court will not enforce it, and the court decides that question as a matter of law.

Section 1615(c) explains what counts as voluntary. The agreement is deemed involuntary unless the court finds several things in writing or on the record. One is that the spouse was represented by independent legal counsel when signing. The alternative is that, after being advised to seek independent counsel, the spouse expressly waived that representation in a separate writing. "Independent" counsel means a lawyer representing that spouse alone, not the other spouse's lawyer. The advisement to seek counsel must come at least seven calendar days before the final agreement is signed.

For agreements signed on or after January 1, 2020, section 1615 also requires at least seven calendar days between the time a spouse is first presented with the final agreement and the time it is signed. That holds whether or not the spouse has a lawyer. If a spouse signs without counsel, section 1615 requires that the spouse be fully informed of the agreement's terms and basic effect. That explanation must be put in writing and delivered before signing. The spouse must also sign a document confirming receipt and naming who provided the information. Section 1615 also requires that the spouse be proficient in the language of the explanation and the agreement.

Section 1615 does not require every spouse to have a lawyer. It does make the absence of independent counsel, without the separate written waiver and the other safeguards, a ground on which a spouse may later challenge the agreement.

There is also a reason specific to married couples. Family Code section 721 places spouses in a confidential, fiduciary relationship in transactions with each other. That relationship imposes "a duty of the highest good faith and fair dealing on each spouse," and "neither shall take any unfair advantage of the other." Before the wedding, the couple were negotiating as two separate people. After it, they are negotiating while already owing each other this duty. Separate counsel is one way each spouse can see clearly what the change means for them.

Step 3: Prepare the Written Amendment or Revocation Agreement

The legal minimum comes from section 1614: a document in writing, signed by both spouses. Careful drafting goes further, so the document can be read and understood years later without guesswork.

An amendment typically:

• identifies the original agreement by its date and the names of both parties;
• states exactly which provisions are being changed, deleted or added;
• sets out the new terms in full, rather than describing them loosely;
• confirms that every provision not changed remains in effect.

A revocation typically:

• identifies the original agreement by its date and the parties;
• states that the agreement is canceled in its entirety;
• names the date the revocation takes effect.

No consideration needs to be recited or exchanged. Section 1614 makes the signed writing enough.

What a signature cannot be is pressured. The voluntariness factors in section 1615 include that the agreement was not signed under duress, fraud or undue influence, and that neither party lacked capacity. "Undue influence" means one person using a position of trust or power to override the other's free choice. That concern carries particular weight between spouses because of the section 721 duty. A draft that one spouse presents as settled, with no room for questions, invites exactly the kind of challenge the process is meant to avoid.

Drafting complexity varies widely. Updating a single clause is a modest task. Rewriting the treatment of a business, a home bought during the marriage, or years of mixed finances takes more drafting time and more review. No court form exists for this document. It is a private agreement between the spouses.

Step 4: Exchange Financial Disclosures

This is often the step that feels most delicate between spouses, because it asks each one to put their full financial picture on the table. The legal reason sits in section 721. An amendment or revocation that changes property rights is a transaction between spouses, and the fiduciary duty applies to it. Section 721 lists duties that come with that relationship. They include giving the other spouse access to books kept about a transaction, and providing "true and full information of all things affecting any transaction that concerns the community property" on request.

In practice, each spouse typically gathers and shares accurate, complete information about assets, debts, income and expenses before anyone signs. That usually means account statements, retirement and investment balances, real estate, business interests, loans and credit obligations. It also includes anything acquired or inherited since the original prenup.

Disclosure ties back to section 1615 as well. One of its enforceability grounds turns on whether a spouse received fair, reasonable and full disclosure of the other's property and financial obligations, or waived further disclosure in writing. A failure to disclose material facts can become a basis for a later challenge to the new document.

At this stage, disclosure is an obligation between the spouses themselves. It is not a court-filing process, and the statutes discussed here attach no court form or filing deadline to it.

Step 5: Sign the Agreement and Understand When It Takes Effect

Both spouses sign the written amendment or revocation. A document signed by only one spouse does not meet section 1614.

Section 1614 sets no timing rule, so a careful amendment follows section 1615's. For agreements signed on or after January 1, 2020, at least seven calendar days must pass between the date a spouse is first presented with the final agreement and the date that spouse signs it. Section 1615 also says the seven-day requirement does not apply to nonsubstantive amendments that do not change the terms of the agreement. A substantive change to the final draft, however, means the agreement is no longer the same one first presented.

Section 1614 does not set an effective date. A carefully drafted document names one. Without that, the natural reading is that it operates once both spouses have signed. The statute mentions only a writing and signatures. It says nothing about notarization or recording with a county recorder. Some couples choose to have signatures notarized as added evidence of who signed and when, but section 1614 does not make that a condition.

No court filing is required. Once properly signed, the amendment or revocation operates between the spouses on its own terms. Each spouse typically keeps a signed copy with the original prenup, so the full set of documents can be found together later.

Where San Diego County Family Cases Are Filed

Most amendments and revocations never reach a courtroom. A court becomes involved only if a dispute arises later, most often in a divorce, about whether the amendment is valid or what it means. In San Diego County, that question would be heard by the Superior Court of California, County of San Diego. Family law cases are assigned to one of four divisions by ZIP code under the court's ZIP Code List (ADM-254):

• Central Division: Central Courthouse, 1100 Union Street, San Diego, CA 92101
• North County Division: North County Regional Center, 325 South Melrose Drive, Vista, CA 92081
• East County Division: East County Regional Center, 250 East Main Street, El Cajon, CA 92020
• South County Division: South County Regional Center, 500 3rd Avenue, Chula Vista, CA 91910

Most family law cases from the ZIP codes ADM-254 assigns to a division are filed in that division. The court's own list is the place to confirm which division applies to a particular address. The court, applying California law, would measure the amendment or revocation against section 1614, the section 721 duty between spouses, and, to the extent they apply, the enforceability standards in section 1615. The guidance on San Diego Family Law Advocates covers California law only.

When the Process Gets Complicated

The straightforward version of this process is two spouses who agree on a change and put it in writing. Several situations make it more involved.

One spouse declines to sign

Section 1614 requires both signatures. A unilateral change, such as one spouse writing a revised version or declaring the prenup canceled, is not effective. If one spouse will not sign, the original agreement stays in force as written.

The original language is unclear

Ambiguous wording in the original prenup makes an amendment harder to draft. If the spouses read a provision differently, they usually need to settle what it means before they can agree on how to change it.

Assets have been mixed since the wedding

Over a marriage, separate and community funds often blend in bank accounts, home payments or investments. An amendment written as if nothing has changed since the original signing can leave real gaps. One example is separate money contributed toward community property. In a division of the community estate, Family Code section 2640 generally provides reimbursement for traced separate-property contributions unless there is a written waiver. An amendment that addresses current holdings deals with the estate as it actually stands.

A business is involved

When one spouse owns a business, the amendment's terms may depend on how that business is treated. A business's value can include goodwill, and its value is decided on the evidence, often with experts. That added work adds drafting and review time.

The original prenup may not be enforceable

If a spouse believes the original agreement fails the standards in section 1615, perhaps because of missing disclosure or the circumstances of signing, that question may need to be resolved before or alongside any amendment. Amending an agreement implies both spouses accept it as their starting point.

Each of these situations adds negotiation, drafting and review. None of them changes the basic rule: a signed writing from both spouses.

Typical Timeline

Section 1614 sets no timing floor. The seven-day period in section 1615, written for the original prenup, is the one a careful amendment follows. For agreements signed on or after January 1, 2020, at least seven calendar days must pass between first presentation of the final agreement and signing.

Beyond that floor, the timeline depends on three things. The first is how quickly both spouses agree on the terms. The second is how complex the changes are. The third is how long drafting, disclosure and independent-counsel review take. An uncontested amendment with straightforward terms can move relatively quickly once both spouses are ready to sign. A contested or complex amendment takes longer, because each round of negotiation and each counsel review adds time.

Because no court filing is needed for the amendment or revocation to take effect between the spouses, there is no court scheduling delay in the typical case.