In an Illinois divorce, you’re generally entitled to a fair share of the property and debt you and your spouse built during the marriage. You keep whatever is legally yours alone. And depending on the gap between your incomes, you may receive spousal support — or be the one who pays it. “Fair” is the word that matters most: Illinois divides marital property equitably, which means by what’s fair under the circumstances, not automatically down the middle.
Below, we’ll walk through exactly what that means in practice — how the property gets split, what stays yours, who keeps the house, whether you have a claim on your spouse’s retirement, when spousal support comes into play and how much, what happens to the debt, and whether cheating changes anything. This is written for Illinois, and specifically for how these cases are handled in DuPage County courtrooms.
Is everything my spouse and I own just split 50/50?
No. Illinois is an equitable-distribution state. That means a judge divides your marital property in what the law calls “just proportions” — a fair split, not a mathematically equal one (750 ILCS 5/503(d)). Sometimes fair is fifty-fifty. Often it isn’t.
The court weighs a list of factors to decide what’s fair, including:
- How long you were married
- Each spouse’s income, earning capacity, age, and health
- What each person contributed — and that specifically includes contributions as a homemaker or parent, not just paychecks
- Whether one spouse wasted marital money (more on that below)
- Who will be caring for the children and needs the family home
- Any prenuptial or postnuptial agreement you signed
Illinois courts have said the split doesn’t have to be equal to be equitable (In re Marriage of Heroy). They’ve also said that dividing property fairly depends on more than an analysis of dollars and cents (In re Marriage of Abu-Hashim). A judge has broad discretion here, and an appeals court will only second-guess it if the decision was truly unreasonable (In re Marriage of Tietz). That discretion is exactly why how your facts get presented matters so much.
Which things count as “ours,” and which stay mine?
Before anything gets divided, the court sorts your property into two buckets. Marital property is what you built together during the marriage, and it’s on the table. Non-marital property is what’s legally yours alone, and you keep it. Anything acquired during the marriage is presumed marital. If you claim something is yours alone, you carry the burden of proving it by clear and convincing evidence (750 ILCS 5/503(a)–(b)).
Property that’s generally yours to keep includes:
- Assets you owned before the marriage
- Gifts and inheritances made specifically to you
- Anything you and your spouse agreed in writing would stay separate
Here’s the trap that catches people. Separate property doesn’t always stay separate. If you mix it into the marital pot — deposit an inheritance into a joint account, or add your spouse’s name to a house you owned before the wedding — the law may treat it as a gift to the marriage. That converts it into shared property. Lawyers call this transmutation; the Illinois Supreme Court built that doctrine in In re Marriage of Olson. The practical lesson: “mine” isn’t automatically safe once it’s been commingled, and tracing it back out takes documentation.
Who gets to keep the house?
The house is usually handled one of three ways: you sell it and split the proceeds, one spouse buys out the other’s share, or one spouse keeps it and gives up other assets to balance the scales. There’s no automatic rule that either spouse gets the home.
One factor tilts this specifically. Illinois law lets the court consider the desirability of letting the parent who has the children most of the time stay in the family home (750 ILCS 5/503(d)). But keeping the house is never free — it’s a trade. If you take the home, you’re typically giving up a claim on something else of comparable value, like retirement savings. And if you want to keep it, you generally have to be able to refinance the mortgage into your own name to get your spouse off the loan.
Am I entitled to part of my spouse’s retirement — and is mine at risk?
Yes — the portion of a retirement account or pension earned during the marriage is marital property and gets divided, no matter whose name is on it (750 ILCS 5/503(b)(2)). This cuts both ways: you may have a real claim on your spouse’s 401(k) or pension, and your spouse may have a claim on yours.
Retirement is often the single largest asset in a divorce, and people routinely overlook it. To figure out the marital share of a pension, Illinois uses a formula that looks at how much of the pension was built up while you were married (the coverture fraction, from In re Marriage of Hunt). Splitting these accounts usually requires a special court order — a QDRO or QILDRO — that divides the account without triggering taxes or early-withdrawal penalties.
One important exception: Social Security benefits can’t be divided or used as an offset in an Illinois divorce (In re Marriage of Crook).
Will I get spousal support — or have to pay it?
Maybe — spousal support (Illinois calls it maintenance, and you may know it as alimony) is not automatic. A judge first has to decide it’s appropriate at all, based on the gap between your finances, not on who did what to the marriage (750 ILCS 5/504).
Support exists to address a real economic imbalance, and that imbalance is well documented. After divorce, women’s household income has been found to drop by an average of 41% — nearly twice the decline men experience. The court looks at factors like each spouse’s income and property, the standard of living you had during the marriage, how long you were married, whether one spouse put a career on hold to support the family, and how realistic it is for the lower earner to become self-supporting and how long that would take (750 ILCS 5/504(a)).
Note two things this is not: it’s not gender-based, and it’s not a reward or punishment for behavior. Either spouse can receive it, and either spouse can be ordered to pay it.
If I do get maintenance, how much and for how long?
When your combined gross income is under $500,000, Illinois uses a guideline formula. Support is roughly 33⅓% of the paying spouse’s net income minus 25% of the receiving spouse’s net income. But the recipient’s total income can’t end up above 40% of the couple’s combined net income (750 ILCS 5/504(b-1)(1)(A)). The length of support is tied to how long you were married, using a set multiplier that grows with the years (750 ILCS 5/504(b-1)(1)(B)).
Support generally comes in one of three forms:
- Fixed-term — it runs for a set period and then ends, often to give the lower earner time to get back on their feet.
- Reviewable — it comes back before the court on a set date to check on the recipient’s progress toward supporting themselves.
- Indefinite — no set end date, an option that becomes available for long marriages (20+ years).
The guidelines are a strong starting point, but a judge can deviate from them when applying the formula wouldn’t be fair (In re Marriage of Brill). Maintenance ends automatically if either spouse dies, if the recipient remarries, or if the recipient moves in with a new partner in a marriage-like relationship (750 ILCS 5/510(c)). And one tax point people get wrong: for divorces finalized after 2018, maintenance is no longer tax-deductible for the payer or taxable to the recipient.
Am I going to be stuck with my spouse’s debt?
Not automatically, and not necessarily half. Debt run up during the marriage is divided on the same fairness standard as property. The court looks at who incurred it, who benefited from it, and who has the ability to pay it (750 ILCS 5/503(a), (d)). Where one spouse is largely responsible for a debt and is in a much better position to pay, a court can assign most or all of it to that spouse (In re Marriage of Werries).
But there’s a critical catch that surprises people: a divorce decree divides responsibility between you and your spouse — it does not bind your creditors. If your names are both on a credit card or loan, the bank can still come after either of you regardless of what the judgment says. That’s why joint accounts stay dangerous until they’re actually closed, paid off, or refinanced out of your name. And be aware that most divorce-related debts — support obligations especially — can’t be wiped out in bankruptcy (11 U.S.C. § 523(a)(5), (15)).
Does it matter that my spouse cheated or caused the divorce?
For the money, usually no. Illinois is a pure no-fault state — the only ground for divorce is irreconcilable differences. And the law says property is divided “without regard to marital misconduct” (750 ILCS 5/503(d)). An affair, by itself, does not get the wronged spouse a bigger share or a bigger maintenance check.
There’s one real exception, and it matters: dissipation. Say your spouse spent marital money for their own benefit, unrelated to the marriage, as it was breaking down — bankrolling an affair or gambling it away. You can ask the court to charge that spending against their share (In re Marriage of O’Neill). The rules here are strict. You have to give proper notice, and once you do, the accused spouse has to prove with clear and specific evidence where the money actually went (In re Marriage of Schneeweis). Vague “I spent it on the household” answers won’t cut it.
So what will actually decide how much I walk away with?
Your specific facts will. There’s no universal number, because the outcome turns on the length of your marriage, the gap between your incomes, what’s marital versus separate, who the children live with, whether either spouse wasted money, and any agreement you signed. Two couples with the same bank balance can land in very different places.
Two realities are worth holding onto. First, full financial disclosure is mandatory — both spouses have to lay out their finances under oath. Illinois courts take hiding assets seriously enough that they’ve vacated finished divorce judgments over it and reopened cases years later when the hiding came to light (In re Marriage of Palacios; In re Marriage of Brubaker). Second, many Illinois divorces are resolved by agreement between the spouses rather than by a judge imposing a result. That means your choices and your negotiating position shape the final number as much as the statute does. And that’s exactly why what you do early matters.
What should I do right now?
Three things protect what you’re entitled to before anything is decided:
- Don’t make big moves on your own. Moving out of the house, draining a joint account, or agreeing to terms just to keep the peace can quietly undercut your position — sometimes permanently.
- Start documenting. Pull together records of what you own, what you owe, and both incomes. Clear documentation is what wins the marital-versus-separate and dissipation fights later.
- Get advice before you commit to anything. Even one conversation can flag a mistake you’d otherwise make in the first week.
This is where experience in the room counts. Lafata Law is based in DuPage County, and both attorneys — Megan Lafata and Tom Elsner — spent years as DuPage County prosecutors, each trying over 100 cases to verdict before building their practice. That courtroom background matters in divorce for a specific reason: cases often settle, but you settle from strength when the other side knows your lawyer is genuinely ready to try the case. Whether the fight is over the house, a share of a pension, spousal support, or a dissipation claim, having counsel who negotiates from real trial readiness shapes how those negotiations go.
If you’re trying to understand what you’re entitled to in your own situation, reach out to Lafata Law in DuPage County to talk it through.
This article is general legal information about Illinois divorce law, not legal advice, and reading it does not create an attorney-client relationship. Illinois law changes and every case turns on its own facts — consult a licensed Illinois attorney about your specific situation.