Prenuptial Agreement Cost in Wisconsin
Last updated 5 min read
A prenuptial agreement in Wisconsin typically costs $500 – $1,500 for a simple agreement and up to $3,000 – $8,000 for complex estates. Wisconsin 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 Wisconsin works, what it costs, and what the state requires.
Cost breakdown
| Complexity | Typical cost | Who this fits |
|---|---|---|
| Simple | $500 – $1,500 | W-2 income, no business, no kids from prior relationships |
| Moderate | $1,500 – $3,000 | Real estate, retirement accounts, modest separate property |
| Complex | $3,000 – $8,000 | Business interests, multi-state property, expected inheritance |
Average attorney rate in Wisconsin: $175–$400/hr. Both spouses hiring separate attorneys typically adds 50–75% to the total bill.
What Wisconsin 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: Yes — without a prenup, property acquired during marriage is presumptively split equally.
The controlling statute is Wis. Stat. §766.58 (Marital Property Agreements) — read the full text on the Wisconsin legislature site.
Wisconsin is a community-property (marital property) state and does NOT use the UPAA. Premarital and postmarital agreements are governed by Wis. Stat. §766.58 ("marital property agreements"). Under Button v. Button, the three-part test requires procedural fairness (fair disclosure + voluntary execution) and substantive fairness (fair terms at signing). Child support cannot be adversely affected.
A notable Wisconsin case
Button v. Button, 131 Wis. 2d 84, 388 N.W.2d 546 (1986). Wisconsin Supreme Court adopted the controlling three-part fairness test for marital property agreements: fair and reasonable financial disclosure, voluntary execution, and substantively fair terms. The definitive Wisconsin authority on prenup and postnup enforceability under §766.58.
Timeline
Start the conversation at least 90 days before the wedding and sign at least 30 days before.
Find a prenup attorney in Wisconsin
The single most important hire for a Wisconsin prenup is your own family law attorney. We partner with LegalMatch to connect readers with vetted family law attorneys in their state.
Find a prenup attorney in Wisconsin
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