Illinois Security Deposit Law: Return Deadline, Limits, and How to Get It Back

In Illinois, the headline rule is set by the Security Deposit Return Act (765 ILCS 710), which applies to residential buildings with five or more units. Under that law, a landlord who wants to keep any part of your deposit for damages must mail you an itemized statement of those damages within 30 days of move-out, and must return the balance you are owed within 45 days. Illinois has no statewide dollar cap on how much a landlord may charge as a deposit. If your landlord wrongfully withholds money in bad faith, you can sue for twice the amount wrongfully withheld, plus court costs and attorney's fees, in the small claims division of your county's Circuit Court. Note that buildings with four or fewer units are not covered by the state Return Act, and the City of Chicago has its own much stricter ordinance, so where you live matters a great deal.

How much can a landlord charge in Illinois?

Illinois does not set a statewide maximum on security deposits. A landlord can generally ask for one month's rent, two months', or some other amount the market will bear. Because there is no cap in the state statute, the amount is largely a matter of your lease.

• There is no statutory limit on deposit size under Illinois state law.
• Some cities, most notably Chicago, regulate deposits closely even though they don't cap the dollar amount.
• Always read your lease: the deposit amount, what it covers, and how it will be returned should be spelled out in writing.

The deadline to return your deposit

Under the Security Deposit Return Act, the timing depends on whether the landlord is keeping any money for damage:

• If the landlord intends to deduct for damages, they must give you an itemized statement of the damage and the estimated or actual repair cost within 30 days after you move out.
• The landlord must then refund whatever you are owed within 45 days of the date you vacated.
• If they fail to deliver the itemized statement on time, they generally lose the right to keep any of the deposit for damages and must return it in full.

If your building has four or fewer units, the state Return Act's specific deadlines do not apply by statute, but your lease and general contract principles still require the landlord to return what they don't have a legitimate right to keep. In that situation, sending a written demand and keeping records becomes even more important.

What can (and cannot) be deducted

A landlord may deduct for actual damage beyond ordinary use and for unpaid rent or other charges allowed by the lease. What they may not deduct is the cost of normal wear and tear, which is the gradual, expected deterioration that comes from living in a place.

• Fair game to deduct: broken windows, large holes in walls, pet damage to floors, unpaid rent, removing trash or abandoned belongings, repairs beyond normal use.
• Not deductible (normal wear and tear): faded paint, minor scuffs, worn carpet from ordinary foot traffic, small nail holes, and the general aging of the unit.
• When the landlord deducts for actual repairs, the itemized statement should include paid receipts, or good-faith estimates that are later replaced with receipts.

Interest on your deposit

Illinois has a separate law, the Security Deposit Interest Act (765 ILCS 715), but it only applies to larger buildings, generally those with 25 or more units. Tenants in covered buildings are entitled to interest on deposits held longer than six months, at a rate tied to a state-published savings rate. Because the rate changes and the building-size threshold is specific, confirm whether your building qualifies and what the current rate is before assuming you are owed interest.

• Interest generally applies only in buildings of 25+ units under state law.
• The rate is set by reference to an annually published savings rate, so it is usually small.
• Chicago's ordinance requires interest on a broader set of rentals, so city tenants should check the local rule.

Penalties and suing in small claims

The teeth of the Illinois Return Act are the penalty provisions. If a landlord willfully or in bad faith fails to comply, a court can award you damages equal to twice the amount wrongfully withheld, on top of returning the deposit, plus court costs and reasonable attorney's fees. That fee-shifting is a powerful tool, because it can make it worthwhile for a lawyer to take your case.

• Start with a written demand letter stating the amount owed, the move-out date, and a deadline, and keep a copy.
• Document everything: move-in and move-out photos, your lease, rent receipts, and any communications.
• If that fails, file in the small claims division of the Circuit Court in the county where the property sits. Illinois small claims handles disputes up to $10,000, and the process is designed to be navigable without a lawyer.
• Because the deposit statutes allow doubled damages and attorney's fees in clear cases, it is often worth a free consultation with a tenant attorney or a local legal aid office, especially if the amount is large or the landlord is uncooperative.

This is general legal information, not legal advice. Landlord-tenant law changes over time and can vary by city and county, and Chicago in particular has its own detailed ordinance with stricter deadlines and penalties. Confirm the current Illinois rules, the exact statute section, and any local ordinance for your municipality, or consult an Illinois tenant or landlord attorney before acting.