Illinois 750 ILCS 5/504 2026 guidelines

Maintenance (Alimony) Calculator

Estimate spousal maintenance amount & duration under Illinois divorce law

Illinois formula (750 ILCS 5/504): (33.3% of payer's net income) − (25% of recipient's net income) = monthly maintenance. Applies when combined gross income is under $500,000/year. Result is capped so recipient does not exceed 40% of combined net income.

Income information

Payer's annual gross income

Recipient's annual gross income

Income type entered above

Years of marriage

Tax filing details (for net income estimate)

Payer's filing status

Recipient's filing status

Monthly deductions (payer)

Child support / mo

Prior maintenance / mo

Other deductions / mo

Additional details

Maintenance type sought

Additional months (partial yr)

⚠ Combined gross income exceeds $500,000/year. The Illinois statutory formula may not apply — courts have full discretion to set amount and duration based on individual factors under 750 ILCS 5/504.

⚠ Payer has prior child support or maintenance obligations. The standard guideline formula may not apply per 750 ILCS 5/504(b)(1). Consult a licensed Illinois attorney.

Your results

Monthly maintenance

—

per month

Annual maintenance

—

per year

Duration

—

Payer's net monthly income—

Recipient's net monthly income—

33.3% of payer's net income—

25% of recipient's net income—

Formula result (before cap)—

40% combined income cap—

Cap applied? —

Monthly maintenance—

Duration breakdown — 750 ILCS 5/504(b-1)(1)(B)

Marriage length

—

per 750 ILCS 5/504

Duration multiplier

—

per Illinois statute

Maintenance duration

—

Total payments (est.)

—

over full duration

Important: This calculator provides general estimates only and does not constitute legal advice. Results are based on the Illinois 750 ILCS 5/504 statutory formula. Actual court orders depend on judicial discretion, individual circumstances, asset division, and other factors. Since 2019, maintenance is not tax-deductible for the payer nor taxable income for the recipient under federal law. The formula applies only when combined gross income is below $500,000/year and the payer has no prior maintenance or child support obligations. Consult a licensed Illinois family law attorney for advice specific to your situation.

Illinois Maintenance Calculator (Alimony Calculator)

Maintenance (Alimony) Calculator

Navigate Site

Follow Us