Divorcing spouses often assume spousal support gets decided case by case with no real formula behind it. Illinois actually uses a specific calculation for most cases, and understanding it can set realistic expectations early.
What Is Maintenance Under Illinois Law?
Maintenance is Illinois’s current term for what many people still refer to as spousal support, and it refers to payments one spouse makes to the other after a divorce. Under 750 ILCS 5/504, Illinois applies a specific guideline formula when combined gross income falls under a statutory threshold and the paying spouse has no prior support obligations.
How Is The Guideline Amount Actually Calculated?
The formula takes 33 and one third percent of the paying spouse’s net annual income and subtracts 25 percent of the receiving spouse’s net annual income. A built in cap prevents the result, once added to the receiving spouse’s own income, from exceeding 40 percent of the couple’s combined net income.
How Long Does Maintenance Typically Last?
Duration depends on the length of the marriage, calculated by multiplying the marriage length by a statutory percentage that increases as the marriage gets longer. Marriages of 20 years or more can result in maintenance equal to the full length of the marriage or an indefinite term, at the court’s discretion.
Does The Formula Apply To Every Case?
No. When combined gross income exceeds the statutory threshold, or when the paying spouse already has support obligations from a prior relationship, courts instead weigh a list of factors rather than applying the formula directly. These factors include each spouse’s income and needs, the standard of living during the marriage, and any impairment to a spouse’s earning capacity from time spent on domestic responsibilities.
Can Maintenance Be Designated Differently Depending On Circumstances?
Yes. Illinois allows maintenance to be set up as fixed term, indefinite, or reviewable, and each designation carries different practical consequences. Hurst, Kay, Allen & Stambler, LLC walks clients through which designation actually fits their circumstances before an agreement is finalized. A reviewable order allows a court to revisit the amount or duration at a specified future point rather than locking in a final outcome from the start.
Does Maintenance Automatically End At Some Point?
Yes, under certain conditions. Maintenance generally terminates automatically if the receiving spouse remarries or begins living with a new partner in a marriage like relationship, or if either spouse dies, regardless of what term was originally set for the payments.
What Documentation Supports An Accurate Maintenance Calculation?
Because the formula depends on accurate income figures for both spouses, gathering the right records early helps avoid disputes later:
- Recent pay stubs or income statements for both spouses
- Tax returns from recent years
- Documentation of any self employment income or business deductions
- Records connected to any prior support obligations, if applicable
How Does This Apply To A Deerfield Divorce?
Because the guideline formula depends heavily on accurate net income figures, disputes over what counts as income can meaningfully change the resulting number. A Deerfield family lawyer can review both spouses’ income documentation to confirm a proposed calculation reflects an accurate picture.
What Happens If Income Changes After Maintenance Is Set?
A significant change in either spouse’s income after maintenance has been established can justify asking the court to modify the existing order. A Deerfield family lawyer can evaluate whether a specific change in circumstances supports a modification request.
Getting the underlying income figures right from the start helps avoid a maintenance calculation that has to be revisited later through a contested modification. If you need help understanding maintenance in a Deerfield divorce, reach out to our office for a confidential evaluation of your situation.
