Prenuptial agreements can protect your assets and set clear financial expectations before you get married. But they’re only worth the paper they’re printed on if a court will actually enforce them. Too many couples spend thousands of dollars creating these documents only to find out later that simple, avoidable mistakes made them completely useless.
Our friends at The Spagnola Law Firm discuss how getting the details right from the start makes all the difference in whether your agreement holds up. A prenuptial agreement lawyer can walk you through the process and help you sidestep the traps that sink these agreements in court.
Hiding Assets or Leaving Out Financial Information
You can’t hold back information about what you own or owe. Courts expect complete honesty from both people before they sign a prenup. That means disclosing everything: bank accounts, retirement funds, real estate, business interests, debts, and ongoing financial obligations. Even if you didn’t mean to hide something, leaving it out creates problems. When your spouse discovers undisclosed assets years later during a divorce, they’ve got solid grounds to throw out the whole agreement. The disclosure has to be thorough and truthful, period.
Waiting Until the Last Minute
Dropping a prenuptial agreement on someone a week before the wedding doesn’t fly in most courtrooms. The closer you get to the ceremony, the more pressure there is to just sign and move forward. Courts know this, and they look at last-minute agreements with serious skepticism. Give yourselves real time to work through this. Most states suggest wrapping up your prenup at least 30 days before you walk down the aisle. This window lets both of you:
- Actually read and understand what you’re signing
- Talk to your own lawyers without rushing
- Push back on terms that don’t work for you
- Make a genuine decision instead of a panicked one
If there’s any hint that someone felt cornered or threatened into signing, the agreement won’t survive a challenge.
Only One Person Gets a Lawyer
Sure, it’s not always a legal requirement for both parties to have their own attorneys. But having separate representation makes your prenup much harder to attack later. When one spouse has a lawyer and the other doesn’t, judges start to worry the agreement might be one-sided. Your spouse’s attorney represents your spouse. That lawyer’s job is to protect their client’s interests, not yours. Getting your own counsel means someone’s actually looking out for your financial future and flagging provisions that could hurt you down the road.
The Terms Are Outrageously Unfair
Courts won’t touch prenuptial agreements that are shockingly lopsided or leave one person in financial ruin. What counts as “unconscionable” depends on where you live, but agreements that strip one spouse of everything while the other keeps their wealth typically fail. Think about provisions that completely waive spousal support even though one person gave up their career to raise kids. Or asset splits that leave someone without basic financial security while their ex lives comfortably. These don’t hold up.
You Skipped Required Formalities
Prenups need to follow specific rules to be valid. In most places, they must be written down and signed by both parties. Verbal promises mean nothing legally, no matter how sincere they seemed at the time. Some states require notarization. Others need witnesses in addition to a notary. Missing these technical steps can void an agreement that’s otherwise completely fair. It sounds bureaucratic, but these formalities matter.
Trying to Control Child Custody or Support
You can’t use a prenuptial agreement to decide who gets the kids or how much child support gets paid. Courts won’t allow it because these decisions have to be made based on what’s best for the child at the time of divorce, not what seemed reasonable years earlier. Any language about waiving child support or locking in custody arrangements is unenforceable. Worse, including these provisions might undermine the validity of your entire agreement.
Your Life Changed But Your Prenup Didn’t
Marriages evolve. The prenup you signed before you had children, changed careers, received an inheritance, or started a business might not make sense anymore. This doesn’t automatically trash the agreement, but courts may refuse to enforce terms that have become unreasonable because life has gone in a different direction. Reviewing and updating your prenup as things change keeps it relevant and defensible.
Start With a Solid Foundation
Your prenuptial agreement only gives you peace of mind if it actually works when you need it. Knowing what makes these documents fall apart helps you avoid expensive mistakes from the beginning. Be honest about your finances. Give yourselves enough time. Get your own lawyer. These steps significantly improve the chances your prenup will stand up when it matters most.