Alimony in Naperville: how it is calculated
Alimony in Naperville follows Illinois law, not a local rule — the same statute applies whether the case is filed in DuPage County or anywhere else in the state. Here is what that formula produces, and where a Naperville case is actually heard.
Where a Naperville case goes
A divorce filed in Naperville is heard by the Illinois court for DuPage County. The judge applies the state statute below; the county sets the filing procedure, not the amount. Naperville has about 153,124 residents (Census Bureau, 2024 estimate).
Open the full Illinois alimony calculator → — same formula, with every input, the statute (750 ILCS 5/504(b-1)) and the date it was last checked.
Formula
33⅓% payer − 25% recipient (net)
Type
Post-divorce maintenance (statutory formula)
Does Naperville have its own rule?
No. 750 ILCS 5/504(b-1) applies across Illinois, so a case from Naperville is decided by the same numbers as one filed anywhere else in the state. What changes locally is the courthouse, the clerk's procedure and how long the docket takes — not the amount.
What the statute says
750 ILCS 5/504(b-1) — Illinois Marriage and Dissolution of Marriage Act, Section 504.
Last checked 2026-08-27. Read the source →
Also for Naperville
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