What to know:
- Wyoming has no prenup statute, so courts read a prenup as a contract; the state Supreme Court confirmed in Seherr-Thoss v. Seherr-Thoss (2006) that prenuptial agreements are valid, enforceable, and governed by the same rules that apply to other contracts.
- A Wyoming court examines whether the agreement is fair and equitable, whether both partners entered it knowingly and voluntarily, and whether either acted under fraud or duress.
- Without a prenup, a Wyoming judge makes whatever disposition of property appears just and equitable under Wyo. Stat. § 20-2-114, and can reach property held by either partner.
- Hiring two attorneys commonly runs $2,100 to $8,700 for the couple at published Wyoming family-law rates of $200 to $350 an hour (Clio 2025 Legal Trends Report).
- First offers a fully online, enforceable way to create a Wyoming prenup, built around the disclosure and timing that Wyoming courts look at, so couples anywhere in the state can handle it on their own schedule.
Getting married in Wyoming and thinking about a prenup? You are already doing the thing that matters most: talking about money and expectations before the wedding, while you both have time and goodwill. A prenup is a planning tool that puts your shared decisions in writing, and in Wyoming the process is more manageable than most couples expect.
Here is the reassuring part. Wyoming has no premarital agreement statute, and its Supreme Court held in Seherr-Thoss v. Seherr-Thoss (2006) that prenuptial agreements are valid, enforceable, and governed by the same rules of construction as other contracts. That means clear terms and a clean signing carry the weight. Both of those are within your control. Below is what makes a Wyoming prenup hold up, what a court does without one, what it costs, and how to get one.
Are prenups valid in Wyoming?
Yes. A prenup is valid and enforceable in Wyoming, and a court reads it the way it reads any other contract. Wyoming has no premarital agreement act, so there is no separate statutory checklist to satisfy. In Seherr-Thoss v. Seherr-Thoss, 2006 WY 111, 141 P.3d 705, the Wyoming Supreme Court held that prenuptial agreements are valid, enforceable, and governed by the same rules of construction that apply to other contracts. The Wyoming Supreme Court has continued to restate that contract-based approach in more recent years, including in Morrison v. Morrison, 2024 WY (Wyo. 2024).
This is worth reframing as a strength. Because Wyoming treats a prenup as a contract, the things that make contracts hold up are the things that make your prenup hold up: both partners understanding what they signed, both knowing what the other has, and neither being pressured. A well-built agreement gives you all three. For a sense of how Wyoming compares with other states, our state-by-state guide lays out the range. If you are weighing whether to get one, a Wyoming prenup is well within reach.
What makes a Wyoming prenup enforceable?
Because a Wyoming court reads a prenup as a contract, it looks at a short list of practical questions. Is the agreement fair and equitable? Did both partners enter it knowingly and voluntarily? Did either act under fraud or duress? These are the review points the Supreme Court described in Seherr-Thoss, and they map onto steps you can take before you sign.
Fairness starts with full disclosure. Each partner should lay out what they own and what they owe, in writing, so the other is deciding with complete information. A court that later reviews the agreement asks whether both partners knew what the other had. Full disclosure is the cleanest way to answer that question yes. Our explainer on why full financial disclosure matters walks through what to include.
Voluntary signing is the other half. An agreement produced days before the ceremony, with one partner feeling cornered, is the fact pattern most likely to draw scrutiny. Giving each other time to read and consider the terms is what a court looks at first. For the broader picture of what courts weigh, see what makes a prenup enforceable. Wyoming does not require either partner to have independent counsel for a prenup to be valid, though nothing stops you from consulting an attorney if you want one.
How does Wyoming divide property without a prenup?
If you do not have a prenup and a marriage ends, a Wyoming judge decides how to divide what you own. Under Wyo. Stat. § 20-2-114, in granting a divorce the court makes whatever disposition of the property of the parties appears just and equitable. That is a wide grant of discretion. A judge can reach property held by either partner, including assets one partner brought into the marriage.
Two things follow from this. First, "just and equitable" does not always mean equal; a judge weighs the circumstances and can split things in a way that is not fifty-fifty. Second, without an agreement, the outcome is the judge's call rather than yours. A prenup lets you and your partner make those decisions together, in advance, instead of leaving them to a courtroom later. If you want to see what the default looks like in more detail, we cover it in what happens if you don't have a prenup.
What can a Wyoming prenup cover?
A Wyoming prenup can set out what counts as each partner's separate property, how debts are handled, and what each person brings into the marriage. If one of you owns ranch land, a business, or property that predates the relationship, the agreement can designate those as separate so a court does not have to guess later. It can also address how debts are treated, so a loan one partner brought in stays that partner's responsibility.
Because the agreement is read as a contract, its terms carry real weight, with one limit worth knowing: a Wyoming court will not enforce an agreement it finds unfair or unconscionable, and it reviews for fraud and duress. That is why clear terms and full disclosure matter so much. Terms that are transparent, mutual, and supported by honest financial disclosure are the terms most likely to hold up.
How much does a prenup cost in Wyoming?
Cost is the question most couples want answered plainly, so here it is. With First, a Wyoming prenup is $649 flat for the couple, with online notarization included. Hiring two attorneys instead commonly runs $2,100 to $8,700 for the couple, because each partner needs their own lawyer and the hourly math runs twice.
Those attorney figures come from published Wyoming family-law rates of $200 to $350 an hour. According to the Clio 2025 Legal Trends Report, Wyoming attorney rates average $309 across all practice areas and $281 for family law. Applying those rates across the same drafting hours for two separate attorneys is how the couple range is calculated.
| Path | What it covers | Typical cost (couple) |
|---|---|---|
| First Self-Serve (online, flat) | Full online prenup with online notarization included | $649 flat for the couple |
| Two attorneys (each partner) | Attorney-drafted, hourly, each partner separately represented | $2,100 to $8,700 for the couple |
| Note | Wyoming family-law rates run $200 to $350 an hour; all-practice-area average $309, family law $281 (Clio 2025 Legal Trends Report) |
For a wider look at what drives prenup pricing, see our guide on how much a prenup costs.
How do you get a prenup in Wyoming?
The path is more straightforward than the traditional process suggests. No PDFs, no hourly rates, no back and forth with attorneys unless you want one. Here is the sequence that lines up with what Wyoming courts look at.
First, both partners disclose their finances fully: assets, debts, income, and anything either brings into the marriage. Second, you agree on the terms and put them in writing; an oral understanding does not hold up, so the agreement has to be a written document you both sign. Third, sign early. Wyoming sets no waiting period, but how much time each partner had to read and consider the agreement is what a court looks at first if it is ever challenged, so give yourselves room before the wedding. Fourth, notarize it. Wyoming does not require notarization for a prenup to be valid, but a notarized signature is straightforward evidence that both partners signed, and it is worth doing.
Nothing in Wyoming law treats an agreement differently because of how it was produced. A prenup in Wyoming created online is on the same footing as one drafted across a conference table, as long as it is in writing, both partners disclosed fully, and both signed freely.
Frequently asked questions
Are prenups enforceable in Wyoming?
Yes. Wyoming has no prenup statute, so courts read a prenup as a contract, using the same rules that apply to other contracts. A court looks at whether the agreement is fair, whether both partners signed knowingly and voluntarily, and whether either acted under fraud or duress.
Do both people need a lawyer for a prenup in Wyoming?
No. Wyoming does not require either partner to be represented for a prenup to be valid. What a court examines is whether both partners signed freely and knew what the other had. Full disclosure and giving each other time to review are within your control.
Does a Wyoming prenup have to be notarized?
No. Wyoming does not require a prenup to be notarized to be valid. Notarizing it is still worth doing, because a notarized signature is straightforward evidence that both partners signed. First includes online notarization at no extra cost.
How much does a prenup cost in Wyoming?
With First, a Wyoming prenup is $649 flat for the couple, with online notarization included. Hiring two attorneys instead commonly runs $2,100 to $8,700 for the couple, since each partner needs their own lawyer and the hourly math runs twice.
When should we sign a prenup in Wyoming?
As early as you reasonably can. Wyoming sets no waiting period, but how much time each partner had to read and consider the agreement is what a court looks at first if it is ever challenged. An agreement produced days before the ceremony is the fact pattern most likely to fail.
Can I do a Wyoming prenup online?
Yes. Nothing in Wyoming law treats an agreement differently because of how it was produced. What matters is that it is in writing and signed, that both partners disclosed their finances fully, and that both signed freely.
What can a Wyoming prenup decide?
It can decide what stays separate, so a court does not have to divide your property the way it considers just and equitable. It can also assign debts and settle what happens to the property each of you brings into the marriage. A Wyoming court can still refuse to enforce terms it finds unconscionable, which is why full financial disclosure matters as much as the terms you choose.
Getting started
A Wyoming prenup is well within reach when you start early, disclose fully, and put clear terms in writing. Those are the same things a Wyoming court looks at, and all of them are yours to control. First serves couples across Wyoming, including Cheyenne, Casper, and Laramie, fully online and at one flat price for the couple. If you want to see what a Wyoming prenup covers before deciding, take a look at First's pricing and what is included.
Methodology
These figures are drawn from the Clio 2025 Legal Trends Report, reflecting published Wyoming attorney hourly rates ($309 all practice areas, $281 family law), and from published Wyoming family-law rates of $200 to $350 an hour. Couple totals ($2,100 to $8,700) are calculated by applying those hourly rates across the same drafting hours for each partner's separate attorney. First's flat price of $649 for the couple is First's own published rate.
Sources
- Seherr-Thoss v. Seherr-Thoss, 2006 WY 111, 141 P.3d 705: Wyoming Supreme Court holding that prenuptial agreements are valid, enforceable, and read as contracts, subject to review for fairness, voluntary entry, and absence of fraud or duress.
- Wyo. Stat. § 20-2-114: Wyoming statute providing that a court divides property in a way that is just and equitable and can reach property held by either partner.
- Clio 2025 Legal Trends Report: published Wyoming attorney hourly rates behind the cost comparison.
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.