Missouri prenuptial agreements, online for $649
A prenup built for Missouri law and for your finances, completed online by you and your partner in days. One flat price for the couple, with notarization included. No retainers, no hourly bills, no per-partner pricing.
Not sure it fits your situation? Book a free 20-minute consult
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Why a Missouri prenup is different
A First prenup is built around the laws of Missouri, and you, from the ground up.
Missouri has a signing formality, and it is easy to miss
Missouri law says a marriage contract that secures, conveys or affects property has to be in writing and acknowledged by each partner, or proved by one or more subscribing witnesses. Acknowledging means appearing before a notary and confirming the signature is yours. In a lot of states notarizing a prenup is simply good practice. In Missouri it is how you satisfy the statute, and First includes online notarization for both partners.
Freely, fairly, knowingly, and with full disclosure
Missouri courts enforce a prenup that was entered into freely, fairly, knowingly, understandingly and in good faith with full disclosure, and that is not unconscionable. In weighing that they look at how much time there was to revise the agreement, whether assets were fully disclosed, and the bargaining position of each partner. The partner attacking the agreement carries the burden of proof, not the one relying on it.
Equitable division is the default you are replacing
Without a prenup, a Missouri court divides marital property in the proportions it deems just, and equitable doesn't always mean equal. Property excluded by a valid written agreement is not marital property at all. That matters most for growth: the increase in value of something you owned before the marriage becomes marital to the extent that marital money or either spouse's work built it.
What your $649 Missouri prenup includes
One price per couple, not per partner. Everything below is included.
- Customized to Missouri law and to your finances, not a fill-in-the-blank template
- Built on a foundation drafted with experienced family law attorneys
- Guided questionnaire both partners complete separately, from any device
- Structured financial disclosure tools for both partners, which is what Missouri courts examine
- Covers real estate, retirement, business ownership, equity, inheritance, gifts, debts, pet custody, and more
- Online notarization included at no extra cost, which is how Missouri asks a marriage contract to be acknowledged
- Save and resume anytime, so both partners have time to review before signing
- $649 flat. No retainer, no hourly bills, no per-partner pricing. Finish at your own pace.
First vs hiring two Missouri attorneys on your own
Key considerations
A Missouri prenup is $649 flat for the couple through First, completed online with notarization included. Hiring two attorneys separately in Missouri, where family law attorneys average $292 an hour and experienced St. Louis-area attorneys run $300 to $500, commonly lands between $3,200 and $12,400 for the couple.
Hired separately, a prenup is quoted per partner and often billed hourly, so the final number is hard to predict before you start. First is one flat price for both of you, with no retainer and no hourly bills.
The fees also price only the legal work. Hiring on your own means building a shortlist of Missouri family law attorneys, calling each one, booking consults, and confirming both fees and availability against your wedding date, then running all of it again because your partner needs a different attorney. First replaces this work with a process the two of you complete together, at your own pace, from anywhere in the state.
| Hourly rate | Typical total for the couple | |
|---|---|---|
| Missouri average, all practice areas | $300 | – |
| Missouri family law attorneys | $292 | – |
| St. Louis area | $300 to $500 | – |
| Two St. Louis-area attorneys hired separately | – | $3,200 to $12,400 |
| First Self-Serve | Flat fee | $649 for the couple |
Rates from the Clio 2025 Legal Trends Report and published St. Louis-area family law rates. Couple totals are computed from St. Louis-area rates. Reviewed for Missouri in September 2026.
How it works
From start to signed on your schedule, with time to review
1
Sign up and invite your partner
Create your account, add your partner's email, and you are both in the platform.
2
Complete the guided questionnaire
Walk through assets, debts, real estate, and retirement at your own pace. Save and resume anytime.
3
Review your custom agreement
Your prenup is generated from your answers and built for Missouri, not pulled from a generic template.
4
Sign and notarize online
Once both partners are aligned, sign and notarize on the platform, well before the wedding.
Real couples, real successes with First®
The #1 customer-rated prenup platform.
These testimonials are real customer quotes collected by First. No compensation was provided in exchange for these quotes.
Is Self-Serve right for your Missouri prenup?
First Self-Serve is the best option for your prenup. It combines a process that guides you through alignment and full financial disclosure with a reasonable cost and free online notarization.
Self-Serve is right for you if…
- You and your partner broadly agree on how you want your finances to work
- You want a Missouri-specific agreement rather than a downloadable template
- You have time before the wedding for both of you to read it, ask questions and sign well ahead of the day
- You want one flat price for the couple instead of two hourly bills
Self-Serve covers situations like…
- One of you owns a business, or holds stock, options or RSUs
- A home or other property one of you owned before the wedding
- An inheritance or family gifts you want to keep as separate property
- Child support or maintenance one of you already pays from a prior marriage
- Deciding maintenance now, whether that means waiving it or setting it in advance
Missouri prenup questions, answered
Is a prenup enforceable in Missouri?
Yes. Missouri enforces a prenup that was entered into freely, fairly, knowingly, understandingly and in good faith with full disclosure, and that is not unconscionable. The agreement also has to be in writing and acknowledged by each partner, or proved by subscribing witnesses. Courts weigh access to independent counsel, the time available to revise the agreement, each partner's bargaining position, and whether assets were fully disclosed. The partner challenging the agreement carries the burden of proof.
How much does a prenup cost in Missouri?
With First, a Missouri prenup is $649 flat for the couple, with online notarization included. Hiring attorneys instead commonly runs $3,200 to $12,400 for the couple, billed hourly at St. Louis-area rates of $300 to $500 an hour, since each partner needs their own attorney and the hourly math runs twice. Our guide to what a prenup costs walks through that math.
Do you do prenups in St. Louis, Kansas City and Springfield?
Yes. First serves couples across Missouri, including St. Louis and St. Charles County, Kansas City and the Jackson and Clay county suburbs, Independence, Springfield, Columbia and Jefferson City. Self-Serve is $649 flat for the couple and is completed online, so where in the state you live does not change the process or the price.
How much does a prenup cost in St. Louis?
Experienced St. Louis-area family law attorneys commonly bill $300 to $500 an hour. Because each partner needs their own, hiring two separately commonly runs $3,200 to $12,400 for the couple. First is $649 flat for the couple, with online notarization included.
Do both people need a lawyer for a prenup in Missouri?
No. Missouri does not require either partner to be represented for a prenup to be valid. Access to independent counsel is one of the things a Missouri court weighs if an agreement is challenged, alongside how much time each partner had to revise it, each partner's bargaining position, and whether assets were fully disclosed. Disclosure and time are within your control, and they are what First Self-Serve is built around. If you'd like to talk your situation through, book a free 20-minute call.
Can I do a Missouri prenup online?
Yes. Nothing in Missouri law treats an agreement differently because of how it was produced. What matters is that it is in writing and acknowledged by each of you, that both partners disclosed their finances fully, that both signed freely and in good faith, and that the terms are not unconscionable. First Self-Serve is $649 for the couple and includes online notarization.
Does a Missouri prenup have to be notarized?
In practice, yes. Missouri requires a marriage contract that affects property to be in writing and acknowledged by each of the contracting partners, or proved by one or more subscribing witnesses. Acknowledging a signature means signing before a notary, so notarizing is the straightforward way to satisfy the statute. First includes online notarization for both partners at no extra cost.
When should we sign a prenup in Missouri?
As early as you reasonably can. Missouri has no statutory waiting period, but the amount of time each partner had to review and revise the agreement is one of the factors a Missouri court weighs if it is challenged. An agreement produced days before the ceremony, to a partner who has not seen it, is the fact pattern most likely to fail. Signing months ahead removes that argument.
Is First Self-Serve right for a complex Missouri prenup?
Yes. Self-Serve covers business ownership, stock, options and RSUs, real estate, inheritance and gifts, existing child support or maintenance obligations, and maintenance terms, all for $649 flat for the couple. If you'd like to talk your situation through first, book a free 20-minute call.
What does a Missouri prenup cover?
A Missouri prenup can set out what stays separate, since property excluded by a valid written agreement is not marital property, how marital property and debts are divided if the marriage ends, and maintenance. It is especially useful for growth: without an agreement, the increase in value of property one of you owned before the marriage becomes marital to the extent marital money or either spouse's work contributed to it. A Missouri court can still refuse to enforce terms it finds unconscionable.
Start your Missouri prenup
A Missouri-specific prenup, built online and made to hold up. $649 flat for the couple, with notarization included.
Not sure it fits your situation? Book a free 20-minute consult