Prenuptial agreements have become a standard part of estate and wealth planning conversations, particularly for high net worth clients with significant assets, business interests, or complex family structures entering a marriage. The legal industry has done a solid job of normalizing them, and for good reason. A well-drafted prenup creates clarity. It documents intent. It reduces conflict in an already difficult process if a marriage ends.
But there is a piece of this conversation that does not get enough attention outside of legal circles, and we have started raising it more directly with clients: a prenuptial agreement is not ironclad. A seasoned family law attorney will tell you the same thing, and we think more clients need to hear it from their financial advisors too.
What Can Override a Prenuptial Agreement
Courts have set aside prenuptial agreements for a range of reasons, some of them being:
- Full financial disclosure was not provided at the time of signing.
- One party did not have independent legal counsel.
- The terms were so one-sided that a court found them unconscionable.
- The circumstances at the time of divorce differed so substantially from what the agreement anticipated that enforcement would be unreasonable.
None of this means prenuptial agreements are not worth pursuing. They absolutely are. But treating one as a guaranteed outcome creates a false sense of security that can lead to inadequate planning elsewhere in the estate and financial structure.
Financial and Estate Planning Implications for Business Owners and High Net Worth Families
When clients enter a marriage with significant assets, business equity, or an expected inheritance, we encourage them to think about their prenuptial agreement as one layer of protection in a larger structure, not the whole structure.
That means keeping premarital assets clearly titled and documented. It means maintaining detailed records of contributions to jointly held accounts or property. It means making sure the estate plan, beneficiary designations, and trust structures reflect the intentions documented in the prenup, not just assuming the prenup will handle everything on its own.
For clients who own businesses, this becomes especially important. A business that grows significantly during a marriage may be treated very differently by a court than a business valued at the time the prenup was signed, regardless of what the agreement says about separate property.
Why the Financial Structure and the Legal Document Need to Be Designed Together
The best outcomes we have seen come from clients whose attorneys and financial advisors are in communication. The legal document and the financial structure need to be designed to work together. When they are drafted in isolation, gaps appear, and those gaps tend to surface at the worst possible time.
If you have a prenuptial agreement in place and have not had a fee-only fiduciary financial advisor review how your current asset structure aligns with it, that conversation is worth having. The goal is not to prepare for failure. The goal is to make sure your planning holds up regardless of what life brings.
