Colorado Prenuptial Agreement
Colorado prenuptial agreements are governed by the UPMAA (C.R.S. § 14-2-306 through § 14-2-309). Courts apply a split review: property provisions are reviewed for unconscionability at signing only, but spousal maintenance provisions face a second review at divorce — one of Colorado's key prenupenforceability risks.
Bottom line: Colorado earns a C grade. Dual review on maintenance means a once-fair waiver can be undone if circumstances change during the marriage. A prenup is still far better than none.
Colorado Prenup Enforceability Rating: C
Colorado Prenup Laws: Key Statutes Explained
UPMAA (C.R.S. § 14-2-306 through § 14-2-309)
Separate Property
All assets can remain separate property, avoiding costly divorce settlements. Joint assets and debts titled in both names are split 50/50 as marital property.
Unconscionability Dual Review
Courts review property/debt provisions for unconscionability only at execution. However, spousal maintenance and attorney fee provisions are reviewed at the time of enforcement.
Unconscionability Standard
A prenup is unenforceable if the party proves: (1) involuntary execution OR duress; (2) no access to independent legal representation; (3) inadequate financial disclosure; OR (4) no notice of rights waived (if unrepresented).
Spousal Support Review at Enforcement
Maintenance provisions must not be "unconscionable at the time of enforcement." Courts evaluate unconscionability considering standard of living, income disparity, marriage length, and financial hardship.
Timing
No minimum specified, but we recommend signing the prenup 60+ days before the wedding, with both parties having 2-3 weeks to review the final version to minimize challenge risk.
Independent Counsel
Not required, but separate counsel dramatically strengthens enforceability if the agreement is later challenged. Sufficient time and financial capacity to review with an attorney is required, and if no counsel is ultimately retained, there must be a written waiver.
Financial Disclosure
"Adequate financial disclosure" of both parties assets, debts and income required, or can be expressly waived in writing. PerfectPrenup includes both.
Medium Burden to Challenge
Challenging party must prove the prenup is invalid by preponderance of evidence (standard burden, not the higher "clear and convincing" requirement). Marital agreements are strongly favored in law. The challenger must prove involuntary execution, duress, lack of counsel access, inadequate disclosure, or unconscionability.
Child Support and Custody
Child support and custody clauses are unenforceable and could undermine the entire agreement. Do not include.
Colorado Prenuptial Agreement Court Cases
In re Marriage of Ikeler, 161 P.3d 663 (Colo. 2007)
The Colorado Supreme Court held that a waiver of attorney's fees in a prenuptial agreement is subject to review for unconscionability at the time of enforcement, and found the waiver unconscionable where the wife was a stay-at-home mother of triplets after only four years of marriage.
Linker v. Linker, 470 P.2d 921 (Colo. App. 1970)
Court of Appeals declared antenuptial agreement void due to constructive fraud where the wife lacked sophistication, had limited knowledge of her husband's property rights, and did not understand the legal effect of the agreement despite having general knowledge of his assets.
Newman v. Newman, 653 P.2d 728 (Colo. 1982)
Colorado Supreme Court held that maintenance provisions in antenuptial agreements are reviewable for unconscionability at the time of enforcement (not just at execution), establishing that circumstances can change during marriage making once-fair provisions unconscionable.
In re Marriage of Bailey, 2025 WL 716404 (Colo. App. 2025)
Court of Appeals upheld prenuptial agreement where wife had general knowledge of husband's finances and her claims of pressure and fear that husband would "snap" did not constitute duress, holding that general awareness of spouse's net worth satisfies disclosure requirements without requiring exact values.
In re Marriage of Watters, 2025 WL 865141 (Colo. App. 2025)
Court of Appeals upheld postnuptial agreement signed 16 years into marriage despite wife's depression and anxiety at signing, holding that husband failed to prove duress and that parties' subsequent conduct inconsistent with the agreement did not establish abandonment.
In re Marriage of Kinning, 2023 WL 12052426 (Colo. App. 2023)
Court of Appeals upheld postnuptial agreement despite husband's controlling behavior and ultimatum to sign within hours before international family vacation, finding wife retained financial independence with unlimited access to joint accounts and was not rendered susceptible to pressure.
In re Marriage of Zander, 480 P.3d 676 (Colo. 2021)
Colorado Supreme Court held that oral agreements to exclude property from the marital estate are unenforceable, requiring that all premarital and marital agreements must be in writing and signed by both parties to be valid under Colorado law.
In re Marriage of Alt, No. 21CA0591 (Colo. App. Mar. 3, 2022)
Court of Appeals reversed trial court and enforced prenuptial agreement's "net appreciation" provision, holding that well-drafted prenuptial agreements can override normal commingling rules and protect separate property principal even when marital funds are commingled with premarital accounts.
In re Marriage of Blaine, 480 P.3d 691 (Colo. 2021)
Colorado Supreme Court held that an interspousal transfer deed signed by only one spouse does not constitute a "valid agreement" to exclude property from the marital estate, as both spouses must sign for an agreement to be valid under marital property law.
5-Step Checklist: How to Sign & Execute a Prenup in Colorado
Step 1: Download and read the Colorado prenuptial agreement
Start with our free template. It is written for Colorado-specific statutes and case law under the Uniform Premarital and Marital Agreements Act (C.R.S. § 14-2-301 et seq.). Read it in full — know what you are getting into legally for marriage. The 15+ pages is written thoroughly to include rebuttals to common legal challenges and fallback provisions.
Step 2: Draft changes on your own
See a clause you don't like? Copy it into an AI like Claude, explain what you'd like to change or what you want the clause "to do." Save any changes as a separate alternate version — don't overwrite the original. Bring both versions to your attorney review. Note: AI is often gender-biased and crafts terms beyond what is legally required. Push back on its output.
Step 3: Find a lawyer in your state
Find a matrimonial or divorce attorney in your state. Avvo, Findlaw, and Justia are good. Look for someone with 10+ years experience. Call or email and ask them how much to review your draft prenup and help with signing. Send them your draft.
Step 4: Meet your lawyer 4–6 months before the wedding
Our recommendation: sign the prenup before proposing. That way, you both get the legal work out of the way, and you know this is the right person to marry. Already proposed? 4–6 months before the wedding should leave you enough time to give your spouse 1–2 weeks to review the final draft and have it signed 60+ days before the wedding. Colorado has no statutory minimum, but presenting a prenup close to the wedding makes a duress challenge significantly easier under the UPMAA.
Step 5: Sign, notarize, and store the agreement
Execute the agreement with both attorneys present — their witness signatures carry more enforceability weight than a standalone notary. If one party doesn't have an attorney, notarize at minimum. Each party keeps a signed original, and so should each party's attorney. Store yours somewhere secure like a safety deposit box. Create a .pdf and save it via a backup drive and email.
Colorado Prenuptial Agreement: Frequently Asked Questions (2026)
What is a prenuptial agreement?
A legal contract signed before marriage that determines how assets, debts, and finances are handled in the event of divorce, instead of state laws which the couple is unaware of and are often punitive. In our prenup, assets and debts are kept separate, unless held jointly, where they are split 50/50. Alimony is modified to incentivize larger families and longer marriages, rather than divorce. A privacy clause allows the growth of an intimate, trusting relationship. A dispute resolution clause moves proceedings out of a courtroom and into mediation or arbitration, preserving an ongoing relationship.
How much does a prenup cost in Colorado?
Attorney-drafted from scratch: $1,500–$5,000+ per side. The smarter approach: start with our free Colorado template, make changes with an AI like Claude, then hire an attorney only to review and assist with signing. The bill should be around $500 per side.
Are prenups enforceable in Colorado?
Yes, but Colorado earns a C rating. Colorado adopted the UPMAA — one of only two states to do so — which adds procedural requirements beyond most states: access to counsel, plain-language waiver notices, and adequate financial disclosure. Property and debt provisions are reviewed for unconscionability only at signing. Spousal maintenance and attorney fee provisions are reviewed again at divorce, meaning changed circumstances can affect enforcement. A prenup is still far better than no prenup.
What makes a prenup invalid in Colorado?
The most common grounds under C.R.S. § 14-2-309: involuntary execution or duress, no meaningful access to independent counsel, inadequate financial disclosure, missing plain-language notice of rights waived, or spousal maintenance that is unconscionable at divorce. Leave out child custody and support entirely — Colorado courts will not enforce them and they can invalidate the rest of the agreement.
Do I need a lawyer to get a prenup in Colorado?
Not technically — Colorado requires that each party have access to independent legal counsel, not that they actually retain one. However, if a party waives counsel, that waiver must be in writing and the agreement must contain plain-language notice of the rights being waived (C.R.S. § 14-2-309). In practice, both sides having separate attorneys is the best way to reduce challenge risk and ensure enforceability. Use the template to cut drafting costs — don't skip the attorney.
What should a Colorado prenuptial agreement include?
Our Colorado template is built around six core principles:
- Separate property — assets and debts stay with the party who acquired them, minimizing conflict
- Joint assets and debts — anything both parties sign for together is split 50/50
- Marital home — ownership is tracked as a percentage of contribution, so each party gets back what they put in
- Spousal support — structured to incentivize larger families and longer marriages, not divorce
- Full financial disclosure — all assets, debts, and income over $1,000, required under Alabama law
- Privacy clause — keeps financial and personal details private, supporting a trusting relationship
Leave out child custody and support entirely — Colorado courts will not enforce them and they can invalidate the rest of the agreement.
Does Colorado's equitable distribution law affect my prenup?
Yes — and this is a key reason Colorado couples need a prenup. Unlike community property states, Colorado divides marital property equitably at divorce under C.R.S. § 14-10-113, meaning a judge decides what's "fair" based on each spouse's circumstances and contributions — not a fixed 50/50 split. That judicial discretion can produce unpredictable results. A prenup replaces that uncertainty with terms both parties agreed to in advance.
How far in advance should I get a prenup in Colorado?
Sign 60+ days before the wedding. Give your spouse at least two weeks to review with their own attorney — Colorado has no statutory minimum, but presenting a prenup close to the wedding invites a duress challenge under the UPMAA. Contact an attorney 4–6 months before the wedding. Best practice: sign before proposing — no time pressure, and you'll find out if you really want to marry this person.
Can a spousal maintenance clause be challenged in Colorado?
Yes — this is the highest-risk clause in a Colorado prenup. Under C.R.S. § 14-2-309(5), maintenance and attorney fee provisions are reviewed for unconscionability at divorce, not just at signing. Newman v. Newman (1982) established this standard, which carried through into the UPMAA. Ikeler (2007) struck an attorney fee waiver as unconscionable where the wife was a stay-at-home mother of triplets after a short marriage.