IL · PRENUP · Updated July 2026 · Free
Illinois Prenuptial Agreement PDF
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Illinois at a glance: UPAA State: Yes (750 ILCS 10/1) · Alimony Waivers: Allowed unless causing undue hardship · Governing Law: 750 ILCS 10/1
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Overview
Prenuptial Agreements in Illinois
Illinois enforces the Uniform Premarital Agreement Act (750 ILCS 10/1, et seq.).
Key Facts
Illinois Prenuptial Agreement — Quick Reference
| Requirement | Illinois Rule |
|---|---|
| UPAA State | Yes (750 ILCS 10/1) |
| Alimony Waivers | Allowed unless causing undue hardship |
| Governing Law | 750 ILCS 10/1 |
Legal Requirements
Illinois Legal Requirements
- Must be in writing and signed by both prospective spouses.
Governing Laws
Illinois Governing Laws
750 ILCS 10/1
Illinois Uniform Premarital Agreement Act
Governs enforceability and execution parameters.
Read the full text of these laws at Cornell Law School's Illinois legal resources or your state legislature's official website.
Questions & Answers
Illinois Prenuptial Agreement — Frequently Asked Questions
What is the "undue hardship" rule in Illinois?
If a waiver of spousal support causes a spouse undue hardship due to unforeseen circumstances, the court can ignore the waiver and award support.