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Prenuptial Agreement Cost in Missouri

Last updated 5 min read

A prenuptial agreement in Missouri typically costs $1,500 – $2,500 for a simple agreement and up to $4,500 – $8,000 for complex estates. Missouri prenup costs depend on attorney rates, how complex your finances are, and whether both spouses retain their own lawyer. This page isn't legal advice — it's a plain-English summary of how a prenup in Missouri works, what it costs, and what the state requires.

Cost breakdown

Complexity Typical cost Who this fits
Simple $1,500 – $2,500 W-2 income, no business, no kids from prior relationships
Moderate $2,500 – $4,500 Real estate, retirement accounts, modest separate property
Complex $4,500 – $8,000 Business interests, multi-state property, expected inheritance

Average attorney rate in Missouri: $200–$300/hr. Both spouses hiring separate attorneys typically adds 50–75% to the total bill.

What Missouri law requires

  • In writing: Yes — required.
  • Notarization: Not required, but recommended for evidentiary purposes.
  • Independent counsel: Strongly recommended (and often outcome-determinative if litigated).
  • Community property state: No — equitable distribution applies in the absence of an agreement.

The controlling statute is Mo. Rev. Stat. §451.220 — read the full text on the Missouri legislature site.

Missouri requires prenups to be in writing and signed. Enforceability is reviewed under contract-law principles plus a fairness analysis: full disclosure, voluntary execution, and the agreement must not be unconscionable.

A notable Missouri case

McMullin v. McMullin, 926 S.W.2d 108 (Mo. Ct. App. E.D. 1996). Missouri Court of Appeals struck down a prenup where the husband listed assets but assigned no values and gave little time to consult counsel — "full disclosure" requires values, not just descriptions.

Read the full McMullin v. McMullin case explanation →

Timeline

Start the conversation at least 90 days before the wedding and sign at least 30 days before.

Find a prenup attorney in Missouri

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Frequently asked questions

How much does a prenup cost in Missouri?
A prenuptial agreement in Missouri typically costs $1,500 – $2,500 for a simple agreement, $2,500 – $4,500 for a moderate one, and $4,500 – $8,000 for complex estates with businesses or multi-state property. Average attorney rates in the state run $200–$300/hr. Both spouses hiring separate attorneys adds 50–75% to the total — and is strongly recommended.
Does Missouri require a notary for a prenup?
No, Missouri does not require notarization by statute. A prenup must be in writing and signed by both parties; notarization is a best practice for evidentiary reasons but not a legal requirement.
Do both spouses need their own attorney in Missouri?
Independent counsel for each spouse is strongly recommended (and often outcome-determinative if litigated). Joint representation — one attorney for both spouses — is among the most common grounds for a court to invalidate a prenup later. Even where it isn't strictly required, paying one lawyer to "save money" frequently costs the entire agreement.
What statute governs prenups in Missouri?
Missouri prenups are governed by Mo. Rev. Stat. §451.220. The full statute text is available on the state legislature site.

Missouri prenup attorneys

What to look for, typical rates.

Will my prenup hold up?

60-second check applying Missouri rules.

Compare states side-by-side

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McMullin v. McMullin case

Missouri Court of Appeals struck down a prenup where the husband listed assets but assigne…

How to get a prenup

6-step process.

What makes a prenup invalid?

5 reasons courts reject them.