Alimony in Illinois: Who Qualifies and How Long It Lasts

In Illinois, either spouse can ask a judge for "maintenance" — Illinois's legal term for alimony — in a case for dissolution of marriage, legal separation, declaration of invalidity of marriage, or dissolution of a civil union. The court's first job is deciding whether maintenance is justified at all, weighing factors such as each spouse's income and earning capacity, the standard of living during the marriage, the length of the marriage, and each spouse's contributions to the household. Only after the court decides maintenance is appropriate does it move on to calculating an amount and a duration. If the parties' combined gross annual income is under $500,000, Illinois law supplies a guideline formula for both amount and length. Marriages of 20 years or more are treated differently: the court has discretion to order maintenance for a period equal to the length of the marriage, or for an indefinite term.

How Illinois decides who qualifies for maintenance

There is no automatic right to maintenance in Illinois, and it is not tied to which spouse was "at fault" in the marriage — the statute specifically says maintenance is awarded without regard to marital misconduct. Instead, the court looks at the practical financial picture: income and property of each spouse, earning capacity, the standard of living established during the marriage, the duration of the marriage, and contributions each spouse made (including as a homemaker). Only after weighing those factors does the court decide whether a maintenance award is appropriate in the first place, and only then does it turn to the guideline calculations described below.

Maintenance can come up in more than a standard divorce. Illinois law applies the same framework to legal separation cases, cases declaring a marriage invalid, dissolution of a civil union, and modification proceedings for an existing maintenance order.

How much maintenance Illinois is likely to order

When the spouses' combined gross annual income is less than $500,000, Illinois uses a guideline formula rather than leaving the amount entirely open-ended:

• Guideline maintenance = 33 1/3% of the paying spouse's net annual income, minus 25% of the receiving spouse's net annual income.
• However the math works out, the amount added to the receiving spouse's income cannot push that spouse's total net income above 40% of the couple's combined net income.

This formula only applies below the $500,000 combined-income threshold. If a couple's combined gross income is at or above that amount, this specific guideline calculation does not automatically apply, and the court instead relies on the broader statutory factors (income, earning capacity, standard of living, and the rest) to set an amount it considers just.

How long Illinois maintenance lasts

Illinois also ties the guideline duration of maintenance to the length of the marriage, using a set of multipliers applied to the number of years married:

• Less than 5 years: 0.20
• 5 to 6 years: 0.24
• 6 to 7 years: 0.28
• 7 to 8 years: 0.32
• 8 to 9 years: 0.36
• 9 to 10 years: 0.40
• 10 to 11 years: 0.44
• 11 to 12 years: 0.48
• 12 to 13 years: 0.52
• 13 to 14 years: 0.56
• 14 to 15 years: 0.60
• 15 to 16 years: 0.64
• 16 to 17 years: 0.68
• 17 to 18 years: 0.72
• 18 to 19 years: 0.76
• 19 to 20 years: 0.80

For example, the multiplier is applied to the number of years the couple was married to arrive at a guideline number of years of maintenance. For marriages of 20 years or more, Illinois departs from a fixed multiplier entirely: the court has discretion to order maintenance for a period equal to the full length of the marriage, or to make it indefinite. That discretion means two similar 22-year marriages could end up with different maintenance lengths depending on the judge's assessment of the statutory factors.

Types of maintenance Illinois courts can order

Illinois law recognizes several different forms a maintenance award can take, and it's worth knowing the vocabulary before you go into a hearing or negotiation:

• Fixed-term — payments for a set number of years.
• Indefinite — payments with no set end date, typically associated with longer marriages.
• Reviewable — the order sets a future date for the court to revisit the amount or whether maintenance should continue.
• Reserved — the court holds open the possibility of awarding maintenance later without ordering it now.
• Maintenance in gross — a lump-sum payment instead of ongoing installments.

When maintenance can change or end (time-sensitive)

Once a maintenance order is in place, it isn't necessarily permanent, and it isn't automatically flexible either:

• Modification requires a substantial change in circumstances. A judge will not adjust maintenance simply because one side would prefer a different number — Illinois law requires a showing that circumstances have substantially changed since the order was entered, and any modification generally only applies to payments coming due after the other side has been formally notified of the modification request.
• Maintenance terminates automatically on the death of either spouse, on the remarriage of the spouse receiving maintenance, or if that spouse begins cohabiting with someone else on a resident, continuing, conjugal basis.
• Notice deadlines matter here. A spouse receiving maintenance who is planning to remarry generally must give 30 days' notice beforehand — and if the decision to remarry is made within that 30-day window, notice must go out within 72 hours instead. Missing these windows can create disputes over whether maintenance payments should have stopped.

The 90-day residency rule (time-sensitive)

Before a judgment of dissolution of marriage can be entered in Illinois — which is what ultimately triggers a maintenance order — at least one spouse must have resided in Illinois for at least 90 days. If you're new to the state or splitting time between states, confirm with the circuit court in the county where you plan to file whether this residency requirement has been satisfied before you count on a maintenance case moving forward there.

If bankruptcy is part of the picture

Maintenance obligations get special protection under federal bankruptcy law. A "domestic support obligation" — which includes court-ordered maintenance and child support — cannot be wiped out in bankruptcy, and it is paid ahead of most other unsecured debts in a bankruptcy case. Debts from a divorce-related property settlement are also generally treated as non-dischargeable in a Chapter 7 bankruptcy. In practice, this means a former spouse who owes maintenance generally cannot use bankruptcy to escape that obligation.

What you can do in Illinois

1. Confirm you meet the 90-day Illinois residency requirement before filing, or before assuming a dissolution case can be finalized here.
2. Gather income documentation for both spouses — net annual income drives the guideline maintenance formula when combined gross income is under $500,000.
3. Calculate your marriage length precisely so you can identify which duration multiplier applies, or whether you fall into the 20-years-or-more discretionary category.
4. Ask the court (or your case) to address which type of maintenance you're requesting — fixed-term, indefinite, reviewable, reserved, or in gross — since each has different long-term consequences.
5. If you're the spouse receiving maintenance and you plan to remarry, calendar the notice deadlines — 30 days' notice in advance, or within 72 hours if the decision is made inside that 30-day window — since missing them can create disputes about whether payments should have stopped.
6. If you want to change an existing order, document the substantial change in circumstances before filing a modification request, and make sure the other party is properly notified, since modifications generally only affect payments coming due after notice.
7. Confirm current numbers and deadlines with the Illinois circuit court clerk in your county or a licensed Illinois attorney, since maintenance calculations and procedures can be updated by the legislature.

This article is for general information only and is not legal advice; consult a licensed Illinois attorney about your specific situation.