Illinois Family Law Insider

Illinois Alimony Calculator: How to Calculate Spousal Maintenance Correctly - #60


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You're using online Illinois alimony calculators getting wildly different estimates because they use outdated income caps and miss the critical combined income cap rule. Illinois spousal maintenance uses a strict net income formula with a household cap and duration tied to marriage length. Sterling Lawyers Lead Attorney and CEO Jeff Hughes reveals the 2025 Illinois alimony formula and the calculation mistakes that cost thousands.


In this episode, you'll learn about:


  • 2025 formula changes including $600K income cap and net income requirements
  • 40% combined income cap preventing recipients from exceeding total household percentage
  • Duration multiplier table ranging from short-term for brief marriages to lifetime for 20-plus years
  • Non-guideline discretion for high-income cases exceeding $600K combined
  • Common calculation errors using gross instead of net income and missing cap applications


Listen in to discover how to accurately calculate Illinois spousal maintenance using current 2025 rules and net income instead of relying on outdated online calculators that inflate estimates and don't apply the 40% cap correctly.

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Illinois Family Law InsiderBy Sterling Lawyers