08 Jun Your Child’s Prenup Is an Estate Planning Issue. Not Just a Family Law Issue.
A divorce you’ll never be a party to can still cost your family millions.
Your child marries. No prenup, because no one wanted the conversation. The marriage fails. And assets you spent a lifetime protecting end up divided by a judge who never met you. This isn’t rare, and it isn’t limited to a particular net worth. I’ve watched it unfold for $10 million estates and $100 million estates alike.
The Inheritance Exposure You’re Not Seeing
In most states, an inheritance is initially classified as separate property. That means it belongs to the child who received it, not to the marital estate. But that classification is fragile. The moment your child deposits inherited funds into a joint bank account, uses inherited money to buy a marital home, or commingles inherited assets with marital assets in any way, the separate property character can be lost.
Once it’s commingled, it’s marital property. And marital property gets divided in a divorce. The trust you spent $30,000 creating and the assets you spent a lifetime accumulating can end up on the wrong side of a property settlement because your child made a single banking decision without understanding the consequences.
Why a Trust Alone Isn’t Enough
Many estate planners tell their clients: “Leave everything in trust and the assets will be protected from your child’s divorce.” That’s partially true. Assets held inside an irrevocable trust, properly structured, are generally not reachable by a beneficiary’s spouse in a divorce. The trust itself is protected.
But here’s what that advice misses. Once the trustee distributes money to your child, the distribution loses that protection. It becomes your child’s money. If your child puts it into a joint account or uses it for joint purposes, it becomes marital money. And most trusts do make distributions, because that’s why you created them.
A prenuptial agreement closes that gap. It can specify that distributions from family trusts remain the separate property of the recipient spouse, regardless of how they’re used. Without a prenup, you’re relying on your child’s financial discipline to maintain the separate character of inherited assets over the life of a marriage. That’s a bet most families lose.
The Business Succession Problem
For business-owning families, the risk is even more concentrated. If your child inherits an interest in the family business, or is expected to take over the company, and then goes through a divorce, the ex-spouse may have a claim against the business interest. Even if the ex-spouse doesn’t end up owning a piece of the company, the litigation itself can force a valuation, create discovery obligations that expose confidential financial information, and disrupt operations.
A prenup that specifically addresses the family business, including how it’s valued in a divorce, whether the non-owner spouse has any claim to appreciation during the marriage, and how buyout rights interact with the operating agreement, can prevent all of this.
How to Have the Conversation
The reason most families skip this is discomfort. Nobody wants to tell their child’s fiance that they need to sign a legal agreement before the wedding. It feels transactional. It feels like you’re predicting failure.
Here’s how I’ve seen families handle it well. The parents explain, clearly and without apology, that the family has a wealth preservation plan and that prenuptial agreements are part of that plan for everyone, not just this child, not just this marriage. It’s a family policy, not a personal judgment. When the prenup is framed as protecting family assets rather than protecting against a specific person, the conversation changes entirely.
Some families go further and include a provision in their trusts that conditions distributions on the beneficiary having a valid prenuptial agreement. That removes the personal element completely. The trust requires it. There’s nothing to negotiate.
What a Good Prenup Covers for Estate Planning Purposes
A prenup designed to work with an estate plan should address: classification of inherited assets as separate property regardless of commingling; treatment of distributions from family trusts; treatment of the family business interest, including valuation methodology and buyout terms; waiver of any claim to the other spouse’s separate property trusts; and a clear statement of what each spouse is and is not entitled to in a dissolution.
This isn’t boilerplate work. The prenup needs to coordinate with the trust documents, the operating agreement, and the overall estate plan. When all four pieces work together, the family’s wealth is protected across generations. When any one of them is missing, there’s a gap.
Is Your Family’s Wealth Protected From Your Children’s Divorces?
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