How Property Is Divided in an Illinois Divorce

Illinois courts divide marital property in "just proportions" — not automatically 50/50. Under 750 ILCS 5/503, the judge evaluates your specific financial circumstances and decides what's fair. That makes preparation critical: the more clearly you present your financial picture, the more influence you have over the outcome.

Step 1: Classify Everything as Marital or Non-Marital

The court's first job is sorting every asset and debt into two categories:

Marital property includes virtually everything acquired by either spouse during the marriage, regardless of whose name is on the title or account. Your salary deposited into a solo checking account? Marital. A car bought with one spouse's bonus? Marital. The default presumption is strong — if it was acquired after the wedding and before the judgment of dissolution, it's marital unless proven otherwise.

Non-marital property stays with the spouse who owns it. This includes:

• Assets owned before the marriage
• Inheritances received by one spouse (if kept separate)
• Gifts given specifically to one spouse
• Property excluded by a valid prenuptial agreement
• Personal injury compensation (except for lost earnings)

The spouse claiming an asset is non-marital bears the burden of proving it by clear and convincing evidence — a high standard. Any ambiguity, and the court classifies it as marital.

Step 2: Value the Marital Estate

Every marital asset gets valued at fair market value — what a willing buyer would pay a willing seller. The court has discretion to select the valuation date, typically the trial date, though parties can agree on the filing date or separation date instead.

For bank and investment accounts, this is straightforward — pull the statement. For real estate, you'll need an appraisal. For businesses, retirement accounts, and complex assets, professional valuation may be necessary.

Step 3: Divide in Just Proportions

The court weighs these statutory factors under 750 ILCS 5/503(d):

• Each spouse's contribution to acquiring, preserving, or increasing marital property — including homemaker and caregiver contributions
• Dissipation of assets by either spouse
• The value of non-marital property assigned to each spouse
• Duration of the marriage
• Economic circumstances of each spouse
• Any prenuptial or postnuptial agreement
• Age, health, occupation, and employability of each spouse
• Whether the custodial parent should keep the family home
• Each spouse's needs and earning potential

No single factor dominates. A 25-year marriage where one spouse stayed home to raise children will look very different from a 5-year marriage between two working professionals.

Common Asset Types and How They're Handled

Bank accounts: Joint accounts are straightforward to divide. Individual accounts opened during the marriage are still marital property — the court divides them based on the overall equitable split.

Investment accounts: Stocks, bonds, mutual funds, and brokerage accounts acquired during the marriage are marital. The valuation date matters here because market fluctuations can significantly change the division.

Retirement accounts: 401(k)s and IRAs accrued during the marriage are marital. Division requires a QDRO (private plans) or QILDRO (Illinois public pensions).

Real estate: The family home is often the largest single asset. Options include selling and splitting proceeds, one spouse buying out the other, or deferred sale until children reach a certain age.

Vehicles: Valued at fair market value (what they'd sell for, not what you paid). Typically each spouse keeps the vehicle they primarily use, with the value difference offset elsewhere.

What Courts Don't Consider

Illinois is a pure no-fault state. Judges cannot factor in adultery, abandonment, or other marital misconduct when dividing property. The only exception: if a spouse wasted marital funds on an affair partner (hotels, gifts, trips), that spending can be claimed as dissipation.

Building Your Case

The outcome depends heavily on what you bring to the table. A complete, organized inventory of every asset and debt — with documentation — puts you in the strongest position to advocate for your share.

The Illinois Divorce Financial Split Guide provides worksheets for inventorying and classifying every asset, calculating net values, and building the marital balance sheet courts use to determine just proportions.

See more Illinois guides →