2026 Guidelines•750 ILCS 5/504

Illinois Maintenance Calculator

Estimate spousal support (alimony) accurately.
(For Child Support, use our Income Shares Calculator)

Important: This calculator provides general estimates only and does not constitute legal advice. Use of this calculator does not create an attorney-client relationship with Steele Family Law or Beermann LLP. Results do not account for judicial discretion, tax implications, or case-specific factors. For advice regarding your specific situation, consult a licensed Illinois attorney.

Financial Inputs

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Net Income Note: This calculator uses approximate tax rates (28% High / 22% Low) to estimate Net Income. For precise "Standardized Tax Amount" calculations required by court, consult an attorney.

Estimated Annual Support

Maintenance (Alimony)
$0
for 0 years
Monthly Payment
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Income Shift Visualization

How Illinois Maintenance is Calculated in 2026

Under 750 ILCS 5/504, maintenance (formerly alimony) is calculated using a standardized formula for most couples with a combined gross income of less than $500,000.

  • The Formula: Maintenance is calculated as 33.3% of the payer's net income minus 25% of the receiver's net income.
  • The Cap: The maintenance award, when added to the receiver's own income, cannot exceed 40% of the combined net income of both parties.
  • Duration: The length of payments is determined by multiplying the length of the marriage by a statutory factor.

High Net Worth Exception

For families with combined incomes exceeding $500,000, judges have discretion to deviate from these guidelines. Beermann LLP specializes in arguing for deviations based on lifestyle, asset division, and future earning capacity.

Learn about High Asset Maintenance →

Need a Personalized Analysis?

Online calculators cannot account for tax strategies, business deductions, or hidden income. Consult an attorney for analysis of your specific situation.

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