Getting married in Wisconsin? A prenuptial agreement lets you set clear expectations about property, debt, and (where allowed) support—so you’re not relying only on default state rules.
Key points
- Prenups are recognized if they’re voluntary, in writing, and signed by both partners.
- Unenforceable if involuntary, unconscionable when signed, or lacking disclosure without waiver.
- Wisconsin follows the UPAA. Must be in writing, signed before marriage. No notarization required but recommended. Full disclosure or waiver is necessary.
- This is a <strong>community‑property</strong> jurisdiction—your prenup can define what stays separate and how community property is handled.
Are prenups legal in Wisconsin?
Wisconsin follows the UPAA. Must be in writing, signed before marriage. No notarization required but recommended. Full disclosure or waiver is necessary.
What makes a Wisconsin prenup enforceable?
Unenforceable if involuntary, unconscionable when signed, or lacking disclosure without waiver.
What you can—and can’t—include
May waive property and alimony; child-related clauses are void.
Simple process
Disclose assets fully, sign early, and notarize.
Next steps
General information only, not legal advice. Laws and cases change—consider speaking with a local attorney about your situation.
Browse other states in our State Guides hub.

