IL STATE GUIDE
Illinois Alimony (Maintenance): Rules and Guidelines
Illinois generally uses the term “maintenance” for spousal support. Section 504 of the Illinois Marriage and Dissolution of Marriage Act addresses eligibility, factors, and—when applicable—guideline amount and duration.
Quick orientation. Illinois courts first decide whether maintenance is appropriate after considering statutory factors. If maintenance is appropriate, guideline calculations apply in qualifying cases; the statute also allows non-guideline awards with findings. A formula is not a substitute for the threshold eligibility decision.
Terminology: People may say “alimony,” while state statutes and courts may use “spousal support,” “maintenance,” or another term. Follow the language used by the state source and court documents.
Eligibility comes before guideline math
The statute directs the court to consider whether maintenance is appropriate in light of the parties’ circumstances. Listed factors include income and property, each party’s needs, present and future earning capacity, time needed for education or training, contributions to the other spouse’s career, the marital standard of living, marriage duration, age and health, tax consequences, and valid agreements. Marital misconduct is not the basis for a maintenance award.
Guidelines apply only in qualifying situations
When the court finds maintenance appropriate, section 504 provides guideline methods for amount and duration in specified circumstances, along with authority to make a non-guideline award when justified. Statutory eligibility thresholds and calculation rules can change. Check the current statute and the facts that affect whether a guideline applies before relying on any calculator.
Orders can have different terms
Illinois law distinguishes fixed-term, indefinite, and reviewable maintenance. The judgment should state which applies. Modification and termination are addressed elsewhere in the statute, so a question about an existing order requires review of both the order’s language and current law.
Questions to take to an Illinois attorney
- Has the court reached the threshold question of whether maintenance is appropriate?
- Do the statutory guideline conditions apply to this case?
- What income definition and tax assumptions are relevant?
- Is the award fixed-term, indefinite, or reviewable?
- What agreement or existing order controls modification or termination?
Official sources and research scope
The Illinois General Assembly notes that its compiled-statute database is updated on an ongoing basis and recent public acts may not yet appear in the compilation. Check the source notes and relevant public acts for current effective dates.
- Illinois Marriage and Dissolution of Marriage Act, 750 ILCS 5/504 ↗
- Illinois Courts: Divorce and family law information ↗
Start with these primary sources, check for later changes and effective dates, and ask a licensed attorney how the law applies to specific facts. This is an educational research summary, not legal advice or a prediction of an outcome.
Content status: Initial state research summary. The cited sources were checked October 13, 2026. The page has not been reviewed by a state-licensed attorney. We will update it as we expand and verify the state library.
Sources checked October 13, 2026 · Read the disclaimer
Prepare for a conversation. Use the private AlimonyPath checklist to organize general questions; it does not estimate a payment or decide legal eligibility.