STATE GUIDE · UPDATED 2026
Every OurPrenup agreement is built for the laws where you live. In Wisconsin, a prenup is formally called a marital property agreement.
Start your Wisconsin prenupYes — prenuptial agreements are legally enforceable in Wisconsin under Wisconsin law (Wis. Stat. § 766.58). To be valid, the agreement must be in writing, signed voluntarily by both partners, and made with fair financial disclosure. It should be notarized (strongly recommended, though not legally required), and both partners should have a real opportunity to review it well before the wedding.
Most property acquired during the marriage is owned 50/50 unless your agreement says otherwise.
Yes. Wisconsin enforces prenuptial agreements under its own statutory framework. The governing law is Wis. Stat. § 766.58. The agreement must be in writing and signed by both partners, entered into voluntarily, and made with fair financial disclosure.
Wisconsin law formally calls a prenup a "marital property agreement." It works the same way: a written contract two people sign before marriage that sets out property and financial rights.
Notarization is not strictly required in Wisconsin, but strongly recommended — a notarized agreement is significantly harder to challenge in court, and OurPrenup's Wisconsin signing instructions include it.
No — Wisconsin does not require witnesses for a prenuptial agreement. Both partners' signatures (ideally notarized) are what matter.
No — Wisconsin does not require either partner to hire a lawyer for a valid prenup. Independent review is still recommended, and every OurPrenup agreement documents that both partners had the opportunity to seek counsel.
Yes. Wisconsin is a community property state — without an agreement, most property acquired during the marriage is owned 50/50. A prenup lets you set your own rules for what stays separate and what is shared.
Yes — Wisconsin allows couples to set, limit, or waive spousal support in a prenup, subject to fairness review and statutory safety valves that protect a spouse from being left in hardship. OurPrenup offers a full waiver, payment formulas with amounts you choose, or leaving support to state law.
Each partner must make a fair and reasonable disclosure of their assets, debts, and income before signing. Hiding assets is the fastest way to make a prenup unenforceable in Wisconsin. OurPrenup builds sworn financial disclosure schedules for both partners into every agreement.
Wisconsin has no fixed statutory deadline, but signing well before the wedding matters: agreements signed days before a wedding are the easiest to attack as pressured. Most attorneys recommend having the agreement finished at least 30 days before the wedding.
Attorney-drafted prenups in Wisconsin commonly run $1,500–$5,000+ per couple. OurPrenup is a flat $599 per couple for a complete Wisconsin-specific marital property agreement, financial disclosure schedules for both partners, a plain-language summary, and step-by-step Wisconsin signing instructions — with optional online e-sign and notarization for $50.
Both parties review the final marital property agreement and all attached financial schedules.
Both parties sign the marital property agreement.
Have the agreement notarized. While Wisconsin does not legally require notarization, we strongly recommend it. Notarized agreements are significantly harder to challenge in court.
Keep the original signed agreement in a safe location. Provide copies to both parties and their attorneys.
3 people total at signing
This guide is general information about Wisconsin law, not legal advice. For advice on your specific situation, consult a licensed attorney in Wisconsin. See our full legal disclaimer.
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