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What You Have Been Told About Prenups Is Wrong

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What You Have Been Told About Prenups Is Wrong

Posted by SteelPeak on Sep 29, 2026, 10:57:39 PM
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If you or someone you know is planning to tie the knot, here is some sound advice about prenups.

The cultural story about prenuptial agreements is wrong in almost every direction. The story says prenups are for the rich, for the cynical, for couples who don't really trust each other, for people planning their divorce before they've even married. None of that holds up under examination. The case for a prenup is actually strongest not for people who already have significant wealth but for people who are still building it, for couples where the financial futures are genuinely different, and for partners who want to remove a category of future conflict before it forms.

The reframe worth considering: a prenup is a contract about money, the same way a will is a contract about inheritance and a financial plan is a contract about priorities. It's a document written during a season of clarity that governs decisions made during seasons of stress. The emotional weight the document carries is almost entirely cultural. The practical value is significant.

What a California prenup actually does

In California, community property law governs marriage by default. Under Cal. Fam. Code §760, all property acquired during marriage while domiciled in California is presumed to be community property, owned 50/50 regardless of whose name is on the title or whose income funded it. Under §2550, at divorce, community property is divided equally. Separate property, meaning what you owned before marriage and what you inherit or receive as a gift during it, stays with its original owner, but only if you can prove that separation with documentation. Commingled funds convert separate property into community property permanently.

A prenup modifies these defaults. It can specify that each spouse's income remains separate property rather than becoming community. It can protect a business started before marriage from becoming a partial community asset. It can preserve a family inheritance from being commingled. It can address spousal support in advance. It can define how specific assets are treated if the marriage ends, which is particularly valuable when the assets are complex (stock options, deferred compensation, startup equity, inherited real estate).

A California prenup cannot waive child support or predetermine child custody. These are always determined at the time of any future dispute based on the children's best interests, which is why child-related provisions in prenups are unenforceable.

What it costs, honestly

California prenup costs in 2026 vary significantly by complexity. A straightforward agreement for a couple with modest assets and conventional W-2 income runs $3,000 to $5,000 total, split between both spouses' attorneys. A mid-range agreement for professionals with homes, retirement accounts, and potential spousal support provisions runs $5,000 to $10,000. Complex agreements involving business ownership, stock options, multi-state real estate, significant inheritances, or international assets can run $10,000 to $20,000 or more, with high-complexity cases reaching $50,000 at the upper end.

California law (Cal. Fam. Code §1615) requires a mandatory seven-day review period between the date the final agreement is presented to the non-drafting spouse and the date it can be signed. This cannot be waived. Any material change to the agreement restarts the clock. Practically, this means starting the prenup conversation three to six months before the wedding, not three weeks. Rushed prenups are more likely to be challenged and more likely to fail enforcement later.

Both parties should have independent legal counsel. This isn't optional in a practical sense, because a prenup signed without separate representation is significantly more vulnerable to challenge in the event of divorce. Budget for two attorneys, not one.

Why the case is strongest for people who aren't already wealthy

The culturally assumed version of the prenup story is that wealthy people get prenups to protect existing fortunes from less wealthy partners. This happens, but it's not the most common or the most valuable use of the document.

The stronger case is for couples where both partners are still building. When one spouse is three years into building a business that might be worth $20 million in a decade, community property law will likely treat that value as jointly owned if the business was started or meaningfully grown during the marriage. A prenup can address this in advance, with specificity about what's separate and what's community. Without it, the question gets resolved in court at the worst possible time.

It's also strong for couples with significant income disparity between the partners, not because one partner is untrustworthy, but because the legal structure of community property produces specific results in specific scenarios, and both partners may prefer a different outcome from what the default rules prescribe.

And it's strong for couples where one or both partners have children from a prior relationship. Here, a prenup can preserve intended inheritance to those children without subjecting it to claims that would otherwise arise under community property law. This is among the most common reasons second-marriage couples pursue a prenup.

What a prenup doesn't do

A prenup is not an insurance policy against divorce. Marriages that end still end, and prenups don't prevent the underlying reasons. What they do is remove one specific category of conflict from the process if divorce does occur, which is the financial unwinding. That's valuable, but it's worth being clear about the scope.

A prenup also can't anticipate every future situation. Couples' circumstances change. New children, new businesses, new inheritances, major career shifts — none of these are fully addressable in a document signed before the marriage begins. Postnuptial agreements exist to address changes that arise, but they're more expensive and more contested than prenups.

Finally, a prenup isn't a substitute for the money conversation. Couples who sign a prenup but haven't actually discussed values, goals, and decision-making frameworks end up with a legal document and no operating agreement. The prenup is best understood as one output of a larger planning conversation, not as a replacement for it.

The question worth asking

For most couples, the question isn't whether to get a prenup. It's whether to have the prenup conversation. The conversation itself surfaces things that are worth knowing about each other regardless of whether a document gets signed at the end of it: financial history, priorities, fears, expectations, and how you'll each handle the hard decisions when they come.

Couples who have the conversation and conclude they don't need a prenup are in a strong position. Couples who have the conversation and do sign one are in an even stronger position. Couples who skip the conversation are the ones who get surprised later.

Considering a prenup or a premarital financial consultation?

We don't draft prenups, but we regularly coordinate with California family law attorneys as part of the broader premarital planning we do with engaged couples. If you're considering a prenup and want help thinking through the structure, the priorities, and how to coordinate it with the rest of your financial plan, a 30-minute conversation is a useful starting point.

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