Moradi Neufer is a California Certified Family Law Specialist firm with a San Francisco office that drafts and reviews postnuptial agreements for married Bay Area couples under California Family Code sections 721, 852, and 1500. Their attorneys help clients protect separate property, startup equity, real estate, and business interests through enforceable marital agreements that meet California’s heightened scrutiny standards.
You got married without a prenuptial agreement. Maybe you didn’t think you needed one. Maybe the timing wasn’t right. Maybe your financial situation looked very different when you got engaged than it does today.
Now you’re established. You have a business, a significant equity stake, Bay Area real estate, or assets that have grown well beyond what either of you anticipated. And you want a clear, legally sound agreement in place, one that protects what you’ve built and ensures both of you understand exactly how your finances would be handled if your marriage doesn’t last.
That’s what a postnuptial agreement does. And at Moradi Neufer, we help married San Francisco couples draft postnuptial agreements that work, that hold up under California’s heightened legal standards, and that are built around your actual financial situation rather than a generic template.
A postnuptial agreement, sometimes called a “postnup” or marital agreement, is a legal contract signed after marriage that addresses how assets, debts, and financial matters will be handled during the marriage and in the event of a dissolution. Read our blog 5 Ways a Postmarital Agreement Can Strengthen Your Marriage and Finances
In practical terms, it does many of the same things a prenuptial agreement does. It can protect separate property, address business interests, establish spousal support provisions, and define how equity compensation will be characterized. The difference is the timing: a postnuptial agreement is created while you’re already married, which changes the legal framework significantly.
California courts take a harder look at postnuptial agreements than prenuptial ones. That’s because once you’re married, you owe your spouse fiduciary duties under California Family Code section 721, which means any agreement between spouses must be entered into with complete transparency, fairness, and full financial disclosure. Courts examine postnuptial agreements more closely than prenups to make sure those standards were met.
That heightened scrutiny is exactly why working with an experienced San Francisco family law attorney matters. A postnuptial agreement that isn’t carefully drafted, fully disclosed, and voluntarily signed by both parties can be challenged and set aside, leaving you with no protection at all.
The Bay Area creates financial complexity that many couples didn’t fully anticipate when they walked down the aisle. Here are the situations we see most often.
A liquidity event is approaching. Your startup is heading toward an IPO, acquisition, or Series C. Your equity stake, once a hypothetical number on a cap table, is now worth something real and substantial. If that equity was granted during your marriage, it may be characterized as community property. A postnuptial agreement can address this directly before the event closes.
RSU grants are growing faster than expected. Tech compensation in the Bay Area is heavy on restricted stock units. RSUs that vest during a marriage generate community property interests, regardless of whose name is on the grant. A postnuptial agreement can define how those grants are characterized and what happens to unvested shares in a dissolution, removing years of potential litigation from the equation.
You started a business during the marriage. When a business is built during a marriage, the appreciation in its value is generally subject to community property rules. If your company has grown significantly, your spouse may have a claim to a portion of that growth, even if they had no involvement in the business. A postnuptial agreement can define the scope of the community property interest and protect the business going forward.
You received an inheritance. Inherited property is separate property under California law, but it can become commingled with community assets over time. A postnuptial agreement can confirm the separate property character of inherited funds, a family home, or investment accounts before the lines get blurry.
You bought San Francisco real estate. Property values in neighborhoods like Pacific Heights, Sea Cliff, Noe Valley, and the Marina have appreciated dramatically. If you owned property before marriage and community funds have been used for mortgage payments or improvements, your spouse may have acquired a community property interest. A postnuptial agreement can address how that is handled.
You’re entering a second marriage or protecting children from a prior relationship. Estate planning and inheritance protection are among the most common reasons remarried couples seek postnuptial agreements. A well-drafted agreement can ensure that your separate assets pass to your children from a prior relationship while still providing for your current spouse.
Your marriage went through a difficult period. Some couples negotiate postnuptial agreements as part of reconciliation, establishing financial clarity as a foundation for moving forward. This is a legitimate and, when properly handled, enforceable use of a postnuptial agreement under California law.
The legal frameworks are similar in some ways and importantly different in others.
Prenuptial agreements in California are governed primarily by the Uniform Premarital Agreement Act, codified at Family Code sections 1600 through 1617. They come with the seven-day presentation rule, independent counsel requirements, and full disclosure standards, and courts generally assume they are valid unless a specific challenge is raised.
Postnuptial agreements operate under a different and more demanding standard. They are governed by the general California transmutation and marital agreement statutes, including Family Code sections 721, 852, and 1500. California courts do not presume a postnuptial agreement is valid. The burden is on the party seeking enforcement to show that the agreement was entered into voluntarily, with full financial disclosure, and that it was fair at the time of signing.
The fiduciary duty between married spouses under Family Code section 721 means that any agreement made during marriage is scrutinized for undue influence. If one spouse had more financial sophistication or more legal resources, and the other signed without truly understanding what they were giving up, a court can and will set the agreement aside.
This does not mean postnuptial agreements are unenforceable. It means they require more care in the drafting process. Both parties should have independent legal counsel. Both parties should make full financial disclosure, which means disclosing all assets, debts, income, and financial obligations, not just the major ones. The agreement should be signed when the marriage is stable, not in the middle of a crisis or during active dissolution proceedings.
A well-drafted postnuptial agreement can address most of the same subject matter as a prenuptial agreement.
Property characterization. The agreement can specify which assets are separate property, which are community property, and how future assets will be treated. This is particularly useful for couples who have commingled assets over time and want to draw a clear line going forward.
Business interests and appreciation. For founders and business owners, a postnuptial agreement can define what portion of a business, if any, is subject to community property claims, and how the business will be valued and treated in the event of a dissolution.
Equity compensation. RSUs, stock options, ISOs, and NSOs can all be addressed in a postnuptial agreement. The agreement can specify which grants are treated as separate property, how unvested shares are characterized, and what method will be used to divide equity compensation if the marriage ends.
Debt allocation. The agreement can assign responsibility for specific debts, protecting one spouse from the other’s business liabilities, student loans, or financial obligations.
Spousal support provisions. A postnuptial agreement can address whether spousal support will be paid in the event of dissolution, establish a formula, or include a waiver. As with prenuptial agreements, a spousal support waiver in a postnuptial agreement is enforceable only if the waiving spouse had independent legal counsel. Courts can also void a waiver if enforcing it would be unconscionable at the time of dissolution.
Estate planning alignment. For couples with complex estate plans, postnuptial agreements can be coordinated with trust structures, beneficiary designations, and estate documents to ensure consistency.
What a postnuptial agreement cannot do: it cannot predetermine child custody or child support. California courts retain exclusive jurisdiction over those matters, and any provision purporting to control them is unenforceable.
In San Francisco’s technology economy, startup equity is often the most valuable and the most legally complicated asset a married couple has to navigate.
California’s community property rules apply to assets acquired during marriage, which means RSUs that vest after your wedding date, stock options exercised while you’re married, and appreciation in a company you founded after the ceremony are all potentially subject to community property claims. The allocation of unvested shares is particularly complex, and California courts apply time-based formulas, sometimes called the Hug formula or the Nelson formula, to determine how much of an equity grant belongs to the community versus the individual spouse.
A postnuptial agreement doesn’t eliminate these questions, but it gives both spouses the opportunity to answer them proactively, while the marriage is intact and both parties are thinking clearly, rather than in a courtroom during a contentious dissolution.
Our team at Moradi Neufer understands the structure of equity compensation in the Bay Area. We know how vesting schedules work, how grant dates interact with marriage dates, and how to draft language that is specific enough to protect your position without being so rigid that it creates problems you didn’t anticipate. If you’re a founder, an executive with a growing equity package, or a tech professional approaching a significant liquidity event, this is a conversation worth having now.
When you come to us, you’re not getting a generic agreement pulled from a template. You’re getting a document built around your actual financial situation, your specific equity structure, your real estate holdings, and what you and your spouse actually care about protecting.
We start with a consultation. We listen to why you want this agreement, what you’re trying to protect, and what your financial picture looks like. We’re direct about what’s achievable and what isn’t, and we’ll tell you clearly if there are aspects of your situation that create legal risk.
We draft the agreement with your specific circumstances in mind and walk you through every provision in plain language. We coordinate with your spouse’s independent counsel and handle revisions until both parties are satisfied. And we make sure the execution process meets California’s standards for voluntary signing and full disclosure.
Our attorneys are Certified Family Law Specialists. We’ve handled marital agreements for founders, executives, high-net-worth couples, and individuals with complex financial situations across San Francisco and the Bay Area. We know what makes these agreements hold up, and we know what makes them fail.
A postnuptial agreement is one of the most thoughtful financial decisions a married couple can make, not a sign of trouble, but a sign of clarity.
If your financial situation has changed significantly since your wedding, or if you’re carrying significant assets without any formal agreement in place, let’s talk about what a postnuptial agreement could look like for you.
Schedule a consultation with our San Francisco postnuptial agreement team. Every case is different. Let’s talk about yours.
1. What is a postnuptial agreement?
A postnuptial agreement is a legally binding contract signed by two married spouses that addresses how assets, debts, and financial matters will be handled during the marriage and in the event of a dissolution. It functions similarly to a prenuptial agreement but is created after the wedding. In California, postnuptial agreements are governed by Family Code sections 721, 852, and 1500, and face heightened scrutiny compared to prenups because spouses owe each other fiduciary duties under California law.
2. Is it too late to get a postnuptial agreement if we’re already married?
No. There is no time limit on when a postnuptial agreement can be signed. Couples can enter into a postnuptial agreement one year into marriage or twenty years in. The agreement is valid as long as it meets California’s legal requirements: it must be in writing, signed voluntarily by both spouses, supported by full financial disclosure, and fair at the time of signing. Courts do look more carefully at agreements signed during marital conflict or immediately before a divorce filing, so the earlier and more stable the circumstances, the better.
3. Are postnuptial agreements enforceable in California?
Yes, postnuptial agreements are enforceable in California, but they face a higher legal standard than prenuptial agreements. Because married spouses owe each other fiduciary duties under Family Code section 721, courts examine postnuptial agreements closely for any sign of coercion, incomplete disclosure, or unfairness. An agreement that was entered into voluntarily, with full financial disclosure and independent legal counsel for both parties, and that was fair at the time of signing, is generally enforceable. Courts can still set aside a spousal support waiver if enforcing it at the time of dissolution would be unconscionable.
4. How is a postnuptial agreement different from a prenuptial agreement in California?
The main differences are timing and legal scrutiny. A prenuptial agreement is signed before marriage and is governed by the Uniform Premarital Agreement Act, codified at Family Code sections 1600-1617. California courts presume prenuptial agreements are valid unless they are specifically challenged. A postnuptial agreement is signed after marriage and faces a higher burden of proof. The party seeking to enforce it must show it was voluntary, fairly disclosed, and substantively fair. Both types require independent legal counsel and full financial disclosure, but the stakes for getting the process right are higher with postnuptial agreements.
5. What can a postnuptial agreement cover in California?
A California postnuptial agreement can address: characterization of separate versus community property, business interests and appreciation, equity compensation including RSUs and stock options, debt allocation, spousal support provisions or waivers, and estate planning goals. It cannot predetermine child custody or child support, which remain exclusively within the court’s jurisdiction. The agreement can draw a clear line between what each spouse brought into the marriage and what has been accumulated since, which is particularly valuable when assets have changed significantly during the marriage.
6. Can a postnuptial agreement protect my startup equity or RSUs?
Yes, and for Bay Area tech professionals and founders this is one of the most important uses of a postnuptial agreement. California’s community property rules apply to RSUs and stock options that vest during the marriage. Without an agreement, the community property component of those grants is subject to equal division in a dissolution. A postnuptial agreement can specify how equity grants are characterized, which grants are separate property, and what method will be used to value and divide unvested shares. This is particularly valuable when a liquidity event is approaching or an equity grant has grown significantly in value.
7. Do both spouses need a lawyer for a postnuptial agreement in California?
Both parties should have independent legal counsel, and California courts strongly favor agreements where both parties were represented. This is especially important with postnuptial agreements because of the fiduciary duty that exists between married spouses. If one party lacked independent counsel and later challenges the agreement by claiming they did not fully understand what they were signing, a court may void it. Having independent attorneys on both sides significantly reduces this risk and is the standard we recommend for all clients.
8. How long does it take to get a postnuptial agreement in California?
The timeline depends on the complexity of the financial situation. A straightforward postnuptial agreement with limited assets can be drafted in four to six weeks. Agreements involving business interests, equity compensation, multiple properties, or complex financial disclosure can take two to four months. Unlike prenuptial agreements, there is no mandatory waiting period between presentation and signing, but rushing the process creates legal risk. Both parties need adequate time to review the agreement with their own counsel and to understand what they’re agreeing to.
9. Can a postnuptial agreement protect a business I started during our marriage?
It can, but the analysis is nuanced. If a business was started during the marriage and has grown in value, some or all of that appreciation may be characterized as community property. A postnuptial agreement can define the scope of the community property interest as of the date of the agreement, establish a formula for valuing the business in the event of dissolution, and address how the business will be treated going forward. Courts will examine whether the agreement is fair to both spouses, so the business valuation and disclosure process is critical. We work with financial professionals to ensure the disclosure is complete and defensible.
10. Should I get a postnuptial agreement before or after an IPO or acquisition?
Before, if at all possible. Once a liquidity event closes and equity converts to cash or public shares, the characterization question becomes harder to resolve retroactively. A postnuptial agreement negotiated and signed before the event can address how pre-event equity, unvested grants, and the proceeds of a sale or IPO will be treated. This is one of the most time-sensitive uses of a postnuptial agreement in the Bay Area, and it’s one we see often. If your company is in the process of an IPO, acquisition, or major funding round, reaching out now rather than after the event closes is strongly advisable.
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