Illinois has some of the strongest tenant protections around security deposits in the country — especially in Chicago, which has its own Residential Landlord and Tenant Ordinance with penalties far exceeding state law. Yet many landlords still include lease provisions that violate these rules, counting on tenants not knowing their rights. Whether you're renting in Chicago, the suburbs, or downstate Illinois, understanding the deposit rules that apply to your location before you sign can protect you from unlawful deductions and guarantee your deposit's return.
What is a Security Deposit?
A security deposit in Illinois is money paid by a tenant to a landlord to secure the tenant's performance under a lease. Illinois law (765 ILCS 710 — the Security Deposit Return Act) and, in Chicago, the Residential Landlord and Tenant Ordinance (RLTO, Chicago Municipal Code §5-12) govern how deposits must be handled, including interest payments, return timelines, and penalties for non-compliance. The rules vary significantly between Chicago and the rest of the state.
Red flags to watch for
Both Illinois state law (for buildings with 25+ units) and Chicago's RLTO (for all rentals) require landlords to pay interest on security deposits annually. Omission of this suggests non-compliance.
Normal wear and tear is not deductible from a security deposit under Illinois law. Pre-listing these as standard deductions is a red flag.
Without a documented starting condition, the landlord can claim damage that existed before you moved in.
Illinois requires return within 30 days if no deductions are claimed. In Chicago, the RLTO requires return within 30 days, or 30 days plus an itemised statement if deductions are made. Longer timelines violate the law.
Under the Chicago RLTO, tenants cannot waive their rights. Any lease clause purporting to waive deposit protections is void.
Your legal rights
Under the Illinois Security Deposit Return Act (765 ILCS 710), landlords must return deposits within 30 days if no deductions are claimed, or within 30 days with an itemised statement if deductions are made. Failure to provide the statement means the landlord forfeits the right to retain any portion. For buildings with 25+ units, landlords must pay annual interest (765 ILCS 715 — Security Deposit Interest Act). In Chicago, the RLTO provides even stronger protections: landlords must pay interest annually on all deposits, provide receipts, hold deposits in federally insured interest-bearing accounts, and return deposits within prescribed timelines. Penalties for RLTO violations include the tenant recovering twice the deposit amount plus interest, plus reasonable attorney fees.
Questions to ask before you sign
- 1Will I receive annual interest on my security deposit?
- 2Where will the deposit be held — in what type of account?
- 3Can we do a joint move-in inspection with a written checklist?
- 4What is the exact timeline for returning my deposit after move-out?
- 5Under what specific circumstances will deductions be made?
- 6Are you complying with the Chicago RLTO or Illinois state law (or both)?
Disclaimer: This guide is for educational purposes only and does not constitute legal advice. Contract law varies by jurisdiction and individual circumstances. Always consult a qualified legal professional before making decisions based on this information.