Prenup Boom: 53% of Under-45 Americans Now Sign One (2026 Poll)

A Harris poll of 2,148 U.S. adults released July 6, 2026 found that 53% of engaged or married Americans under 45 have signed a prenuptial agreement — up from roughly 8% in the 1990s. For California couples, this matters because a prenup is the only way to opt out of the state's default 50/50 community property rule under Cal. Fam. Code § 760.

Key Facts

The Bloomberg feature reports the 53% figure is a sharp climb from approximately 8% in the 1990s and about 41% of Gen Z respondents in a 2022 survey. Experts quoted in the piece attribute the shift to younger couples treating prenuptial agreements as ordinary financial planning, aided by viral attention to celebrity prenups. The data signals a generational reframing: a prenup is now a budgeting tool, not a prediction of divorce.

Why this matters legally

A prenuptial agreement is the single most powerful private contract two people can sign before marriage, because it overrides the property-division rules a state would otherwise impose. In California, a valid prenup lets couples decide in advance how assets, debts, and spousal support will be handled — replacing the default community property regime with terms they negotiate themselves.

The legal significance of the 53% figure is straightforward: more couples are exercising contractual control over outcomes that judges would otherwise decide. Under Cal. Fam. Code § 760, everything earned or acquired during marriage is presumptively community property, split equally at divorce. A prenup is the recognized legal mechanism for changing that default. When adoption rises this fast, it changes the baseline expectation family courts encounter — more incoming divorces will involve a governing contract rather than a blank statutory slate.

That said, a prenup only works if it is legally enforceable. A rising signing rate does not guarantee a rising rate of valid agreements. Many of the prenups driving this boom are signed by younger couples using templates or apps, and California imposes strict procedural requirements that a poorly drafted document will fail. The gap between signing a prenup and having an enforceable one is where litigation happens.

How California law handles this

California enforces prenuptial agreements under the California Uniform Premarital Agreement Act, codified at Cal. Fam. Code § 1600–1617, but only when specific safeguards are met. The state treats prenups more skeptically than most jurisdictions because it wants to prevent one party from railroading the other into an unfair deal.

Under Cal. Fam. Code § 1615, a premarital agreement is unenforceable if the challenging party did not sign it voluntarily, or if the agreement was unconscionable when signed and that party lacked fair disclosure of the other's finances. California adds a mandatory seven-day rule: under Cal. Fam. Code § 1615(c), the party against whom enforcement is sought must have had at least seven calendar days between first receiving the agreement and signing it. Skip that window and the whole contract can collapse.

California also restricts what a prenup can do to spousal support. Under Cal. Fam. Code § 1612, a provision waiving or limiting spousal support is unenforceable if the party challenging it was not represented by independent legal counsel when the agreement was signed, or if the provision is unconscionable at the time of enforcement. In plain terms: if you want an alimony waiver to hold up in California, both spouses generally need their own lawyers. Full financial disclosure is not optional — each party must exchange a fair and reasonable picture of assets and debts, and hidden accounts are a common ground for invalidation. Couples exploring these agreements should read our overview of prenuptial agreements and, for those already married, postnuptial agreements, which follow different fiduciary-duty rules.

Practical takeaways

1. Build in the seven-day cushion. Under Cal. Fam. Code § 1615(c), the receiving party must have at least seven calendar days to review before signing. Present a full draft weeks before the wedding — never hand over a prenup the night before or during rehearsal-dinner chaos.

2. Get independent counsel for both sides. California will not enforce a spousal-support waiver under Cal. Fam. Code § 1612 unless the waiving party had their own attorney. Two lawyers is not overkill; it is often what makes the document survive a challenge.

3. Disclose everything in writing. Attach a signed schedule of each party's assets, debts, and income. Incomplete or misleading disclosure is the most common reason California courts void prenups under Cal. Fam. Code § 1615.

4. Do not rely on a generic online template. The viral, app-driven signing wave means many couples hold documents that were never tailored to California's requirements. A template that ignores the seven-day rule or the counsel requirement can be worthless exactly when you need it. If you want to understand how property would divide without an agreement, understanding community property is the starting point.

5. Revisit the agreement if life changes. A prenup signed at 28 may not fit at 40 after a business launch or inheritance. California allows postnuptial modifications, but they carry heightened fiduciary scrutiny because spouses owe each other duties of good faith once married.

If you are weighing a prenup or trying to figure out your next step, our personalized divorce roadmap can help you map out your options, and you can find a divorce attorney in your county to review any agreement before you sign. The rise to 53% shows this is now mainstream financial planning — but only a properly drafted, California-compliant agreement actually delivers the protection couples think they are getting.

This article discusses recent news and provides general legal commentary. It does not constitute legal advice. Every case is unique. Consult a qualified family law attorney for advice specific to your situation.