Spousal Maintenance (Alimony) in Illinois: How It's Calculated and Who Qualifies

If you're heading into a divorce in Illinois, one of the first questions that comes up is whether spousal maintenance — what many people still call "alimony" — will be part of the picture. Will you pay it? Will you receive it? And if so, how much, and for how long?

The good news is that Illinois doesn't leave this up to a judge's gut feeling. Spousal maintenance is governed by a statutory formula that brings a fair amount of predictability to the process, even though the court still has discretion in many cases. Here's how it actually works.

What Is Spousal Maintenance?

Spousal maintenance is financial support paid by one spouse to the other during or after a divorce. It's meant to help the lower-earning spouse maintain a reasonably comparable standard of living post-divorce, particularly in marriages where one spouse earned significantly more or where one spouse stepped back from a career to support the household.

Maintenance is separate from child support. A couple can have a maintenance order, a child support order, both, or neither, depending on the circumstances of the case.

Who Qualifies for Maintenance?

There's no automatic entitlement to maintenance in Illinois. A court will look at whether an award is appropriate at all before it even gets to calculating an amount. Factors the court considers include:

• The income and property of each spouse

• The needs of each spouse

• The earning capacity of each spouse, including any impact from time out of the workforce

• The standard of living established during the marriage

• The duration of the marriage

• The age and physical/emotional health of both spouses

• Contributions one spouse made to the other's education, training, or career

• Any valid prenuptial or postnuptial agreement addressing maintenance

  
  

If the court determines maintenance is appropriate, it then turns to Illinois's guideline formula to calculate the amount — unless the parties' combined income exceeds the statutory threshold or other factors make the guideline formula inapplicable, in which case the court has broader discretion.

How Is the Amount Calculated?

For cases where the guidelines apply, Illinois uses a formula:

(33.33% of the paying spouse's net annual income) − (25% of the receiving spouse's net annual income) = annual maintenance amount

There's also a cap: the amount awarded cannot bring the receiving spouse's total income (their own income plus maintenance) above 40% of the couple's combined net income.

For example, if one spouse earns $120,000 net and the other earns $40,000 net, the formula would calculate 33.33% of $120,000 minus 25% of $40,000 — then check that result against the 40% combined-income cap before finalizing the number.

How Long Does Maintenance Last?

Duration is also guided by a formula, this time based on the length of the marriage. The court multiplies the length of the marriage by a statutory percentage that increases with each additional year of marriage. In short marriages, maintenance tends to be shorter and more clearly time-limited. In longer marriages — generally 20 years or more — the court has discretion to order maintenance for a period equal to the length of the marriage or on an indefinite basis.

Can the Court Deviate From the Guidelines?

Yes. Even when the guideline formula technically applies, a judge can deviate from it if applying it strictly would be unfair given the specific facts of the case. When a court deviates, it's required to explain its reasoning on the record, referencing the same broader factors listed above (income, needs, standard of living, etc.).

Does It Matter Who Filed or Who Was "At Fault"?

Illinois is a no-fault divorce state, so misconduct like infidelity generally does not factor into whether maintenance is awarded or how much. The focus stays on the financial realities of the marriage, not on assigning blame.

What About Taxes?

Under current federal tax law, maintenance payments are not deductible by the paying spouse and are not counted as taxable income for the receiving spouse. This is a shift from the old rules, so it's worth keeping in mind when negotiating settlement terms, since the after-tax impact can differ from what the raw formula numbers suggest.

Talk to a Family Law Attorney Before Assuming Either Outcome

Every case is different, and the guideline formula is a starting point, not a guarantee. Whether you expect to pay maintenance or receive it, understanding how the calculation works — and where a court has room to deviate — puts you in a much stronger position heading into settlement discussions or litigation.

If you have questions about how spousal maintenance might apply to your situation, contact Larimer Law LLC at (773) 902-0200 to schedule a consultation.