Prenuptial agreements — contracts signed before marriage that outline how property and finances will be handled if the marriage ends — are generally upheld by Colorado courts. But they are not automatically bulletproof. If a prenup is challenged during a divorce, a judge will examine both how it was created and what it actually says.

How Colorado Law Approaches Prenup Enforcement

In 2013, Colorado enacted the Uniform Premarital and Marital Agreements Act, which applies to all prenuptial agreements signed on or after July 1, 2014. This law governs what a prenup can contain, what’s required for it to be valid, and the limited grounds on which a judge can declare it unenforceable. Attacking a prenuptial agreement in Colorado requires proving that one of the requirements of the Marital Agreements Act was not met. Except for spousal maintenance and attorney fees, the grounds for challenging a prenup depend on whether the process was fair, not whether the outcome was fair. Simply regretting what you agreed to years ago is not enough.

What Can Get a Prenup Thrown Out in Colorado

A prenuptial agreement is unenforceable if the party against whom enforcement is sought proves that their consent was involuntary or the result of duress, that they did not have access to independent legal representation, or that they did not receive a reasonably accurate description and good-faith estimate of the other party’s property, liabilities, and income. Here’s what each of those grounds actually looks like in practice.

Signing Under Duress

Courts ask whether the agreement was freely entered into by both parties. Rushing a partner to sign, presenting the document close to the wedding date, or using threats or intimidation can all be interpreted as signing under duress — and a prenup signed under duress will be tossed out. One important nuance: an ultimatum that marriage will not occur without signing the agreement does not, in itself, constitute duress under Colorado law. There generally needs to be something more — real pressure, a lack of time to respond, or outright threats.

No Meaningful Opportunity to Get Legal Advice

For agreements entered into after July 1, 2014, Colorado law added a distinct ground for challenge based on the lack of independent legal representation. If a party didn’t have a lawyer, the prenup must include a clear, plain-language statement outlining the rights and obligations affected by the agreement. This means that if a spouse does not have legal representation, the agreement must include a conspicuous notice detailing the rights waived by signing. Without that notice, the agreement is vulnerable.

It’s important to note here that it’s not required that a spouse have a lawyer. What’s required is that they have the opportunity to get a lawyer if they want.

Hidden or Incomplete Financial Disclosure

Colorado law requires each party to disclose all known assets, liabilities, and income. The purpose of this disclosure is to ensure that each party understands the other party’s financial landscape, enabling informed consent. Adequate financial disclosure means that, before signing, both spouses receive a reasonably accurate and complete description and good-faith estimate of the value of any property, income, and liabilities of the other spouse. If this did not occur, or one spouse hid assets from the other, there may be cause to challenge the prenup.

Unconscionable Spousal Maintenance Terms

Even an otherwise enforceable prenup can be thrown out in part if its provisions regarding spousal maintenance or attorney fees are unconscionable at the time of enforcement. The issue of unconscionability is decided by the court as a matter of law. Even a well-drafted marital agreement may be deemed unconscionable by a judge reviewing circumstances years later, at the time of divorce. A spousal support waiver that seemed reasonable before children were born can look very different after one spouse spent a decade out of the workforce.

What a Prenup Can Never Include

Some provisions are off-limits no matter how carefully the rest of the agreement was drafted. Terms that affect child support, custody, or visitation are unenforceable — courts must evaluate those matters based on the best interests of the child at the time of the divorce. Any clause that violates public policy, such as penalizing a spouse for filing for divorce, is also void. Courts retain discretion to strike down provisions contrary to Colorado public policy.

The Biggest Misconception: “Unfair” Doesn’t Automatically Mean Unenforceable

Many people assume that if a prenup heavily favors one partner, a court will refuse to enforce it. That’s not quite how Colorado law works. The grounds for challenging a prenup depend on whether the process was fair, not whether the outcome was fair. Assuming a marital agreement was drafted by a competent attorney who followed the procedural and disclosure requirements, a challenge to the property and debt provisions is highly unlikely to succeed. That’s cold comfort if you signed without fully understanding what you were giving up, which is exactly why having your own attorney review an agreement before you sign is so valuable.

Your Next Step

If you’re considering a prenup or postnup, let’s discuss your specific situation. We’ll give you clear pricing upfront and help you understand exactly what you’re getting for your investment.

Ready to discuss a prenup? Contact Lester Law for a free consultation and transparent pricing.

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