Illinois Security Deposit Law: The 30-Day and 45-Day Return Rules

Illinois has no statewide cap on how much a landlord can charge for a deposit — but the return deadline splits in a way that trips up a lot of renters, and Chicago layers its own stricter rules on top.

Two deadlines depending on deductions

Under Illinois’s Security Deposit Return Act, the timeline depends on whether the landlord is deducting anything:

• If deducting for damages, the landlord has 30 days to send an itemized statement with paid receipts or estimates for the repairs
• If no deductions are being made, the landlord has 45 days to return the full deposit

That’s the reverse of what most renters assume — the deadline is actually shorter, not longer, when the landlord plans to keep part of your money.

Receipts aren’t optional

Illinois is specific about documentation: if a landlord deducts for repairs, they generally must provide paid receipts, or copies of them, within 30 days of sending the itemized statement, if the repair wasn’t finished in time for the original notice. A deduction with no receipt and no clear itemization is exactly the kind of charge worth challenging.

If you’re in Chicago, check the local ordinance too

Chicago’s Residential Landlord and Tenant Ordinance layers additional protections on top of state law, including interest requirements on deposits held over six months and stricter penalties for violations. If your unit is in Chicago, the city ordinance — not just state law — governs your deposit.

What happens when landlords violate the rules

For unintentional violations, you’re generally entitled to your actual damages — the amount wrongfully withheld. For violations found to be in bad faith, Illinois law allows you to recover:

• Twice the amount of the deposit wrongfully withheld
• Plus court costs and attorney’s fees

Illinois landlords who withhold a deposit in bad faith risk paying double, plus your legal costs.

What to do if the deadline passes

1. Check whether your unit is in Chicago and covered by the local ordinance’s extra rules
2. Send a written demand citing the Security Deposit Return Act and the relevant deadline (30 or 45 days)
3. Ask specifically for receipts if deductions were claimed without documentation
4. File in small claims court if the landlord doesn’t respond

Not sure exactly how many days have passed, or what your landlord actually owes you? Run the numbers in our free security deposit calculator — it does the date math and flags whether your landlord has already blown the deadline.

If you do get an itemized list and something looks inflated or undocumented, our deposit dispute guide covers how to push back.

Quick reference

1. No statewide cap on deposit amount
2. With deductions: 30 days and an itemized statement with receipts
3. With no deductions: 45 days to return the full deposit
4. Chicago has its own stricter ordinance on top of state law
5. Bad-faith withholding allows recovery of 2x the deposit plus court costs and attorney’s fees

This article is general information for renters, not legal advice. Landlord-tenant law changes, and city or county ordinances can add rules on top of state law. Confirm specifics with a local tenant rights organization or attorney before acting.