If you own a business and are heading into a divorce, your prenuptial agreement may feel like your strongest line of defense. It can be, but only if it was properly drafted and meets California’s strict legal requirements.
What your prenup can actually do for your business
Under California’s Uniform Premarital Agreement Act, a valid prenup can identify your business as separate property, limit your spouse’s claims to business income and appreciation, and establish how the company will be valued if the marriage ends.
Without a valid prenup, California law gives your spouse a potential claim to any growth your business experienced during the marriage, even if they had no role in running it.
What California law requires for a prenup to hold up
California family law sets out what makes a prenup legally binding. The agreement must be in writing, signed voluntarily by both parties and supported by full financial disclosure from each side. Both parties should have had independent legal counsel, or must have waived that right expressly in writing.
California requires both parties to wait a minimum seven-day window after receiving the final agreement before signing it. This gives each person time to review the terms carefully and seek separate legal representation before committing.
Where prenups can fall short
A signed prenup is not automatically bulletproof. Common grounds for challenge include agreements signed under time pressure or too close to the wedding, incomplete financial disclosure, and situations where one party lacked independent counsel without properly waiving it. Courts can also strike specific clauses they consider grossly unfair to one party, even while upholding the rest of the agreement.
Getting legal help before your prenup faces a court challenge
If you have any doubts, find out now rather than mid-litigation. A family law attorney can review your agreement and identify vulnerabilities before your spouse’s legal team does.
Gathering financial records from around the time you and your spouse signed the prenup can also assist during an attorney review, particularly documentation showing what each party shared financially and when. A prenup is only as strong as its foundation. If yours has weaknesses, understanding them early gives you a better chance of addressing them before they become a problem.

