Prenuptial Agreements in Illinois: A Plain-English Guide

A prenuptial agreement is not about expecting the worst. It is about transparency, planning, and protection. In Illinois, without a prenup, income earned during the marriage is generally considered marital property regardless of who earns it. A prenup allows you to make intentional decisions instead of relying on default legal rules.

What Is a Prenuptial Agreement?

A prenup is a legal contract signed before marriage that defines financial rights and responsibilities. Without one, earnings during the marriage are typically treated as shared marital property in Illinois.

Before your first consultation, it helps to start a list of your assets, income, and debts so you have a clear picture of where things stand.

Why This Matters in Illinois

Without a prenup, Illinois law presumes that all income earned during a marriage is marital property, no matter who earned it or whose name is on the account where it is deposited. That includes salary increases, bonuses, and business growth. Illinois law also presumes that all debt accrued during the marriage is marital debt, no matter whose name is on the account where the debt is held.

A prenup allows you to define different terms if you want to.

Is a Prenup Right for You?

Consider a prenup if you have assets, debt, or significantly different income potential. Also consider one if you expect an inheritance in the future. Most people do not keep inherited assets separated well enough to protect them without a prenup.

A prenup may be a good fit if any of these apply:

• You want clarity around income and assets.
• You want to disclose your income, assets, and debts to your intended spouse.
• You want your intended spouse to disclose theirs to you.
• You have pre-marital property you want to protect.
• You expect an inheritance or other non-marital property you want to protect.

Legal Requirements in Illinois

For a prenup to be enforceable in Illinois, it must be voluntary, with full financial disclosure and terms that are understood before anyone agrees to them. It must be in writing and signed. Best practice is for both parties to be represented by their own independent attorney.

A valid prenup allows you to override Illinois default property division rules and write your own. The state of Illinois has essentially already written a prenup for you and everyone else. When you get your own prenup, you are writing one tailored to your specific situation.

What Should Your Prenup Include?

Income

Most people choose to change the Illinois default. The default says all income earned during the marriage is presumed marital, even if it is in an account with only one person's name on it. Many couples agree to the opposite: all income in any jointly titled account is marital, but assets held in separate accounts are separate, non-marital property.

Retirement

The default is that all retirement assets earned during the marriage, including gains and losses, are marital property subject to division. A prenup can change that.

Spousal Support

Illinois has a maintenance calculator written into the Illinois Marriage and Dissolution of Marriage Act. You can choose to use that calculation or specify a different one.

Paid Amounts

Illinois law does not provide for a specific amount to be paid after a certain number of years of marriage. In a prenup, you can specify that one party will pay a defined amount to the other if a divorce happens after a particular number of years.

Real Property

You can make specific elections for your situation. For example, you can specify that a pre-marital house or condo remains separate even if the non-owning spouse contributes mortgage payments during the marriage.

Plans for Inheritance

You can specify what happens if one party receives an expected or unexpected inheritance during the marriage.

Benefits and Considerations

Benefits: clarity, and protection of assets and future income. Many people appreciate that a prenup lets them understand the financial decisions they make during marriage. They do not have to guess about how the law will treat certain income or assets at the end of a marriage, whether by divorce or death.

Challenges: emotional discomfort, stigma, and the time and effort required to gather the financial disclosures needed to complete the agreement.

Preparing to Work with an Attorney

Understand your finances and priorities before beginning the process. Gather as many account statements as possible to make the disclosure step less painful.

Questions to think through before your consultation:

• What concerns do I have?
• What circumstances can I foresee?
• What specific answers do I need?
• How is Illinois law likely to treat my situation without a prenup?

Talk to an Illinois Family Law Attorney About Your Prenup

We work with prenuptial agreement clients throughout Illinois. Whether you are protecting pre-marital property, a future inheritance, or business interests, we can help you think through your priorities and write an agreement that fits your situation. Talk to a family law attorney before you decide whether a prenup is right for you.