Prenuptial Agreements in Colorado: The Rules, the Costs, and How to Get One

You're planning a Colorado wedding, and somewhere between the venue deposit and the guest list, a question surfaces: if we sign a prenup, will it hold up here? It's a fair thing to ask. Colorado couples marry at a high rate; the U.S. Census Bureau's 2024 marriage and divorce data put Colorado among the states with the highest 2022 marriage rates. A prenup is a planning tool that helps you and your partner agree, in writing and ahead of time, on how you'd handle property and finances. And in Colorado, whether it holds up comes down to a clear four-part test.

Let's walk through what that test asks, how Colorado divides property when there's no prenup, what one costs, and how to get one.

Are prenups valid in Colorado?

Yes. Colorado enforces premarital agreements under its version of the Uniform Premarital and Marital Agreements Act. A Colorado prenup must be a written record signed by both partners, and under C.R.S. § 14-2-309 a court can refuse to enforce it on any one of four grounds. Meeting the format is the easy part. The four grounds are where agreements succeed or fail.

If you're weighing whether to create one, our Colorado prenup page walks through what's included. Below is the legal backbone every valid Colorado agreement rests on.

What makes a Colorado prenup enforceable?

The statute gives a Colorado judge four independent reasons to set an agreement aside. Any one of them, on its own, can sink the whole prenup, so all four matter.

The first is voluntariness. If a partner can show the signing was involuntary or the result of duress, a court can refuse to enforce the agreement. This is why timing matters so much (more on that below).

The second is access to independent legal counsel. Colorado does not require either partner to hire a lawyer, but it does ask that each partner had access to one and a reasonable time to decide whether to use that access.

The third is notice for an unrepresented partner. If a partner signs without their own attorney, the agreement must give that partner a plain-language explanation of the rights and obligations the prenup modifies or waives. A partner going it alone has to be told, in language they can follow, what they're giving up.

The fourth is financial disclosure. Before signing, each partner needs adequate information about the other's finances, or a knowing waiver of that disclosure. Hiding an account or a debt undercuts the whole agreement.

These four grounds are specific to Colorado's statute, and they're the reason a generic template pulled off the internet can leave you exposed. For a broader look at how enforceability works across states, see our guide on what makes a prenup enforceable.

Do you need a lawyer for a prenup in Colorado?

No. Colorado does not require either partner to be represented, and prenups are routinely signed without attorneys. What the statute asks is narrower and more practical: that each partner had access to independent legal advice and a reasonable time to decide whether to use it, that financial disclosure was adequate, and that an unrepresented partner received plain-language notice of the rights being waived.

Read those requirements together and a pattern emerges. The law cares less about whether a lawyer was in the room and more about whether each partner understood what they were signing and had room to walk away. Give yourselves time, exchange full financial information, and make sure an unrepresented partner gets a clear explanation of the terms. That's what the statute is checking for.

How does Colorado divide property without a prenup?

Without a prenup, a Colorado court divides your marital property under the state's equitable distribution rule. Colorado is an equitable distribution state, which means marital property is divided in the proportions a court deems just under C.R.S. § 14-10-113. Here's the part couples often miss: "equitable" doesn't always mean "equal." A judge weighs factors like each partner's contribution and economic circumstances, and the split can land somewhere other than fifty-fifty.

Colorado is not a community property state, where marital assets are presumed to split evenly. If you want to understand that distinction, our guide on community property states breaks it down.

There's a wrinkle in Colorado law that surprises a lot of people. Under C.R.S. § 14-10-113(4), the increase in value during marriage of property a partner owned beforehand, or received by gift or inheritance, is marital property. So the house you bought before the wedding stays yours, but the appreciation it gains during the marriage can be divided. Same with an inherited investment account: the principal is separate, the growth is marital by default. A prenup is how a couple keeps that growth designated as separate, and it's one of the most common reasons Colorado couples sign one.

For how Colorado stacks up against other states, see our state-by-state comparison.

What can a Colorado prenup cover, and what can't it?

A Colorado prenup can address most of the financial questions a couple faces. You can designate what counts as separate property and what becomes marital, decide how property gets divided if the marriage ends, set terms for spousal maintenance, and clarify how debts are handled. These are the terms that give couples clarity and reduce what's left to argue about later.

There are limits. A prenup cannot dictate child support or child custody; Colorado courts decide those based on the child's best interests at the time, no matter what an agreement says. And maintenance and attorney-fee terms carry a special check. Under C.R.S. § 14-2-309(5), a court can refuse to enforce a maintenance or attorney-fee provision if it is unconscionable at the time of enforcement, and the judge decides that as a matter of law. Unconscionable means so one-sided or unfair that a court will not enforce it. So even a signed maintenance waiver can be revisited if, years later, enforcing it would leave a partner in severe hardship.

How much does a prenup cost in Colorado?

Cost is the question most couples land on, and the range is wide. The traditional route means each partner hires their own attorney, because a single lawyer cannot represent both of you. Colorado's average lawyer rate is $321 an hour according to the Clio 2025 Legal Trends Report, and Denver-area family law rates run higher, from $280 to $600 an hour. Multiply that across two attorneys and several rounds of drafting, and the couple's total commonly runs $3,000 to $14,900.

Here's how the paths compare:

With First, a Colorado prenup is $649 flat for the couple, completed online with notarization included. No hourly meters, no separate notary trip, no back and forth between two firms. For a fuller breakdown of what drives prenup pricing, see our guide on how much a prenup costs.

How do you get a prenup in Colorado?

The practical path is shorter than most couples expect. Colorado's statute asks for an agreement in a record signed by both partners, and it does not treat an agreement differently based on how it was produced. That means an online prenup and a lawyer-drafted one stand on the same statutory footing, as long as the substance is right: voluntary signing, access to independent legal advice, adequate financial disclosure, and drafting to Colorado law.

Start early. Colorado sets no fixed waiting period and requires no notary or witnesses, but signing days before the ceremony is the fact pattern most likely to draw a duress challenge. Give yourselves a reasonable stretch of time. Exchange complete financial information. If one partner isn't using an attorney, make sure they get a plain-language explanation of what the agreement waives. Then sign and notarize.

If you'd rather handle it online, First's Self-Serve process builds a prenup in Colorado to the state's four-part test, at your own pace, with online notarization built in.

Frequently asked questions

Is a prenup enforceable in Colorado?

Yes, if it clears Colorado's four-part test. The agreement must be a written record signed by both partners. A court can refuse to enforce it if a partner shows the signing was involuntary, there was no access to independent counsel, an unrepresented partner got no plain-language notice of waived rights, or financial disclosure was inadequate.

Do both people need a lawyer for a prenup in Colorado?

No. Colorado does not require either partner to be represented, and prenups are routinely signed without attorneys. What the statute asks is that each partner had a reasonable time to decide whether to hire one, adequate financial disclosure, and, for an unrepresented partner, plain-language notice of the rights the agreement waives.

Does a Colorado prenup have to be notarized?

No. Colorado's statute requires the agreement to be in a record and signed by both partners; it does not require notarization or witnesses. Notarizing is still worth doing, because a notarized signature is straightforward evidence that both partners signed, and voluntary consent is the first thing a court examines.

How much does a prenup cost in Colorado?

Hiring attorneys commonly runs $3,000 to $14,900 for the couple, billed at Denver-area rates of $280 to $600 an hour, since each partner needs their own. With First, a Colorado prenup is $649 flat for the couple, completed online with notarization included.

When should we sign a prenup in Colorado?

Early enough that neither partner is deciding under pressure. Colorado sets no fixed deadline, but the law asks that each partner had a reasonable stretch of time before signing. An agreement produced days before the ceremony is the fact pattern most likely to fail that test; signing months ahead removes the argument.

Can I do a Colorado prenup online?

Yes. Colorado's statute asks for an agreement in a record signed by both partners and does not treat an agreement differently based on how it was produced. What matters is voluntary signing, access to independent legal advice, adequate financial disclosure, and drafting to Colorado law.

Getting started

If you're weighing a prenup in Colorado, First's online Self-Serve process builds an agreement to Colorado's requirements, at your own pace, with online notarization included. You and your partner set the terms now, with full financial information and time to decide, which is exactly what the statute asks for. See what it costs on our pricing page.

Methodology

These figures are drawn from the Clio 2025 Legal Trends Report for Colorado attorney hourly rates and from published Denver-area family law firm rates, covering 2025. Couple totals of $3,000 to $14,900 are computed from Denver-area hourly rates on the assumption each partner retains their own attorney. First's flat price of $649 for the couple reflects the Self-Serve package including online notarization.

Sources

First is not a law firm. The information and tools provided by First on this site are not legal advice and not a substitute for the advice of an attorney.