Chicago RLTO Landlord Compliance Guide for 2026
The Chicago Residential Landlord and Tenant Ordinance (RLTO), Chapter 5-12 of the Municipal Code, layers on top of Illinois state landlord-tenant law (765 ILCS 705/710/715, 735 ILCS 5/9-101 et seq.) and adds significant additional duties. A landlord operating in the City of Chicago who uses a generic Illinois lease template will be out of compliance on multiple RLTO provisions. This guide pulls the RLTO compliance checklist together for 2026.
The Chicago RLTO at Municipal Code Chapter 5-12 governs most residential rentals within the City of Chicago. The RLTO applies to most rental units in Chicago, with limited exemptions for owner-occupied 6-flat-or-smaller buildings, units in cooperatives or condos owned by the resident, and units that are part of a religious, educational, or medical institution.
The RLTO supplements (does not replace) Illinois state law. Where the RLTO is stricter, the RLTO controls.
## Deposit interest (5-12-080)
Chicago RLTO requires the landlord to pay interest on security deposits annually. The interest rate is set annually by the City of Chicago Department of Finance based on the rate paid by Chicago banks on passbook savings accounts.
Practical rules: - Pay interest annually within 30 days of the end of each 12-month period. - The interest must be paid in cash or as a credit applied to rent. - Failure to pay interest entitles the tenant to damages of two times the deposit plus attorney fees (5-12-080(f)).
Landlords often skip the annual interest payment and accumulate liability over multi-year tenancies.
## RLTO summary attachment (5-12-170)
5-12-170 requires the landlord to attach a copy of the RLTO summary (a 2-page document published by the City) to every new lease and every renewal. The summary must be in the same language as the lease.
Failure to attach the RLTO summary entitles the tenant to terminate the tenancy on 30 days written notice and potentially recover one month's rent in damages (5-12-170 last paragraph).
This is the single most-missed RLTO rule by out-of-state and large-portfolio landlords.
Chicago RLTO 5-12-140(h) caps late fees: - $10 per month for monthly rent under $500. - $10 plus 5 percent of any rent above $500.
So for $1,500 monthly rent: $10 + 5% of $1,000 = $60 maximum monthly late fee.
Daily compounding late fees and percentage-of-rent fees alone are unenforceable in Chicago.
## Smoke detector + heat ordinance
Chicago Fire Safety Ordinance requires: - Working smoke detectors in every dwelling unit. - Working carbon monoxide detectors in any unit with fuel-burning equipment or attached garage.
Chicago Heat Ordinance requires: - Minimum 68F during the day (8:30 AM to 10:30 PM) from September 15 to June 1. - Minimum 66F at night during the same period.
Landlord failure exposes to City fines and tenant rent abatement.
5-12-160 prohibits any non-judicial removal: changing locks, shutting off utilities, removing belongings without a court order. Penalties: - $200 to $500 per day fine. - Two times actual damages. - Attorney fees.
Chicago routinely enforces these. Self-help is the fastest way for a Chicago landlord to lose money.
Skipping annual deposit interest. Compounds over multi-year tenancies, with 2x damages plus attorney fees.
Missing RLTO summary attachment. The tenant can terminate on 30 days notice + 1 month rent damages.
Late fees above 5-12-140(h) cap. $50 flat fees on $1,000 rent are over the cap; the excess is unenforceable.
Self-help lockout in Chicago. Per-day fines of $200-$500 plus 2x damages plus attorney fees.
For a Chicago-specific lease that bundles state law (765 ILCS) compliance with all RLTO 5-12 provisions (interest schedule, RLTO summary, capped late fees, heat and smoke detector terms), see leasekit.io/templates/illinois-residential-lease for $29 one-time. The template flags Chicago-specific content separately so it works for both Chicago and downstate Illinois rentals.