Prenuptial & Postnuptial Agreements in Illinois Divorce

At Cohen Law, we help individuals and couples protect their finances and secure their futures through comprehensive prenuptial agreements and postnuptial agreements. These legally binding contracts are powerful tools in an Illinois divorce, especially in high-net-worth cases, marriages with business ownership, or situations involving inheritance or family property. They provide clarity, transparency, and peace of mind—before and during marriage.

Illinois Prenuptial Agreements

A prenuptial agreement (“prenup”) is a written contract created and signed before marriage. Under the Illinois Uniform Premarital Agreement Act, a prenup can outline how property and financial issues will be handled in the event of divorce, separation, or death. Couples in Illinois often use prenups to:

Protect premarital assets, investments, and real estate
Safeguard business interests, professional practices, and family companies
Define spousal maintenance (alimony) terms
Keep inheritance and family wealth separate
Avoid expensive litigation and uncertainty in the divorce process

Prenups are especially valuable for individuals with significant assets, second marriages, blended families, or anyone wanting financial transparency from the beginning.

Illinois Postnuptial Agreements

A postnuptial agreement (“postnup”) is similar to a prenup, but signed after the marriage has already begun. Spouses often pursue a postnup when major life events or financial changes occur, such as:

A spouse opens a business or receives a large inheritance
One party takes on significant debt
There are concerns about financial behavior or spending
Couples want to outline property division, marital vs. non-marital assets, or maintenance
The marriage is struggling and spouses want clarity and structure going forward

Postnups are common in high-asset marriages, professional families, and situations where spouses want financial security or protection without pursuing divorce.

Why Prenups & Postnups Matter in Illinois Divorce

Without a valid agreement, Illinois marital property laws determine how assets, debts, businesses, retirement accounts, and real estate are divided. A prenup or postnup allows couples—not the court—to control those decisions.

Prenups and postnups don’t cause divorce—they help prevent uncertainty. By clearly defining expectations, they reduce stress, protect financial stability, reduce conflict and legal fees, protect personal wealth and inherited property, and minimize courtroom battles.

Courts in Illinois generally enforce prenups and postnups if they are fair, voluntary, and executed properly. Experienced legal representation is critical to ensuring the agreement stands up in court.

Why These Agreements Matter

At Cohen Law, we work with clients to draft, negotiate, and review these agreements with professionalism, discretion, and care.

Whether you are preparing to marry or already married and seeking clarity, we make sure your rights, assets, and future are protected.