Illinois Security Deposit Deadline

Learn Illinois's 30-day damage itemization rule, 45-day full-return rule, and the trigger for security deposit disputes.

Track both Illinois timing rules

Illinois has two key statewide timing rules: a 30-day itemized damage statement rule and a 45-day full-return rule if the required statement and receipts are not furnished.

For property-damage deductions, the 30-day clock runs after the later of the tenant vacating the rental or the tenant's right of possession ending.

The 30-day damage statement rule

If the landlord keeps money for property damage, Illinois generally requires an itemized statement within 30 days after the later of:

The statement should identify the alleged damage and the estimated or actual cost for each item.

The 45-day full-return rule

If the required itemized statement and receipts or copies are not furnished, Illinois generally requires the landlord to return the security deposit in full within 45 days after you vacated.

This is why you should track both dates: when you moved out and when your right of possession ended, if those dates are different.

Receipts and estimate follow-up

Paid receipts or copies should be included with the damage statement. If the landlord uses estimated costs, paid receipts or copies generally must follow within 30 days after the estimate statement was furnished.

If receipts cannot be produced through no fault of the landlord, Illinois requires substitute proof and an explanation. Missing receipts should be reviewed carefully, not ignored.

Address and delivery matter

Give your landlord a current mailing address in writing. If you want deposit notices by email, provide a verified email address too. Save proof of what you sent and when.

Illinois allows delivery by personal delivery, postmarked mail to the last known address, or electronic mail to a verified email address provided by the tenant. If the tenant fails to provide a mailing or email address, that can affect damages or penalties tied to the landlord's response.

Official sources

Source reviewed: April 2026.

What to do next

After you know which deadline is the problem, the next written step should match it: missing itemization, missing receipts, missed 45-day return, unsupported deductions, or a final demand before escalation.

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Important: This page provides general information and is not legal advice.