Breaking a Lease in Illinois

Illinois Rent Increase Laws — Caps & Notice Rules (2026)

By Oleg Kachko · Updated June 10, 2026

✓ Law Verified June 2026

This guide explains illinois rent increase laws in plain English — whether there is a cap on how much your landlord can raise your rent, how much notice they must give, which Illinois cities have local rent control, and what to do if an increase looks illegal. All figures are from Illinois law, verified as of June 2026.

In This Illinois Guide:

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Illinois Rent Increase Rules at a Glance

Statewide rent cap NO. Illinois has no statewide rent cap, no percentage ceiling, and no CPI-based formula. A landlord can raise rent by any amount as long as proper notice is given and the increase is not retaliatory or discriminatory. Note: SB3530 (introduced February 2026) would cap increases at 3.5% per 12-month period, but it has NOT been enacted as of June 2026.
Notice required before increase Week-to-week tenancy: 7 days written notice. Month-to-month tenancy: 30 days written notice. Year-to-year tenancy: 60 days written notice. Mobile home parks: 90 days written notice under the Mobile Home Landlord and Tenant Rights Act. Chicago has longer requirements under its Fair Notice Ordinance: 30 days if tenancy is under 6 months, 60 days if 6 months to 3 years, and 120 days if over 3 years. Cook County (suburban, outside Chicago) requires 60 days if tenancy exceeds 6 months and 120 days if over 3 years under its RTLO. These notice requirements come from 735 ILCS 5/9-207 for state law.
How often rent can be raised No specific Illinois statute limits how often rent can be raised. For month-to-month tenancies, a landlord can raise rent as often as proper 30-day written notice is given each time. For fixed-term leases, rent can only change at renewal unless the lease allows mid-term increases.
During a fixed-term lease NO — a landlord cannot raise rent during a fixed-term lease unless the lease itself contains an explicit provision allowing mid-term increases. If the lease is silent on rent increases, the rent is locked for the entire lease term. Any increase can only take effect at lease renewal.

Retaliatory increases: YES — Illinois prohibits retaliatory rent increases under the Landlord Retaliation Act (765 ILCS 721), effective January 1, 2025. A landlord may not raise rent in retaliation for a tenant reporting code violations, complaining to community organizations, joining a tenant union, testifying in court, or exercising any legal right.

If a landlord raises rent within 1 year of a tenant’s protected activity, the increase is presumed retaliatory unless the landlord proves a legitimate reason.

Tenants who prove retaliation may recover damages equal to 2 months’ rent or 2 times actual damages (whichever is greater), plus reasonable attorney’s fees. This replaced the older Retaliatory Eviction Act (765 ILCS 720), which was repealed effective January 1, 2025.

Illinois Cities With Local Rent Control

NONE. Illinois law (the Rent Control Preemption Act, 50 ILCS 825) bans all local governments — including home-rule cities like Chicago — from enacting rent control ordinances. No city in Illinois has a local rent control or rent stabilization ordinance. Chicago and Cook County have enhanced notice period requirements but no rent caps.

Exempt properties: Not applicable — Illinois has no rent cap, so there are no exemptions to one. If a future cap is enacted, exemptions would be defined in that legislation.

State preemption: YES — Illinois fully preempts local rent control. The Rent Control Preemption Act (50 ILCS 825, enacted 1997) prohibits any unit of local government from enacting, maintaining, or enforcing any ordinance that controls the amount of rent charged for private residential or commercial property.

This applies even to home-rule municipalities. The only exception is for government-owned public housing. A narrow emergency exception (50 ILCS 825/10) exists but requires a detailed housing report, public hearings, and state legislature approval. This preemption has NOT been repealed or amended as of June 2026.

What to Do If Your Rent Increase Is Illegal

If you believe a rent increase is retaliatory, you may file a complaint with the Illinois Attorney General’s office or consult a tenant rights attorney. Many tenants can file a lawsuit under the Landlord Retaliation Act (765 ILCS 721) seeking damages of 2 months’ rent or 2 times actual damages, plus attorney’s fees.

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If your landlord failed to give proper written notice, you may be able to remain at the current rent until the required notice period has elapsed.

Chicago tenants can contact the Metropolitan Tenants Organization (MTO) or file a complaint under the Chicago RLTO. You may also contact your local legal aid organization — check with the Illinois State Bar Association lawyer referral service or Illinois Legal Aid Online (illinoislegalaid.org).

Other Illinois rent rules: Illinois’s Rent Control Preemption Act (50 ILCS 825) is one of the strongest in the country — it blocks all local rent control, even from home-rule cities. Chicago’s Fair Notice Ordinance provides significantly longer notice periods (up to 120 days) than state law for long-term tenants.

The Landlord Retaliation Act (765 ILCS 721), effective January 1, 2025, expanded protections beyond the old Retaliatory Eviction Act — it now covers rent increases as explicit retaliatory acts and extends the presumption period to 1 year.

Cook County’s RTLO (effective June 1, 2021) provides additional notice protections for suburban Cook County tenants. SB3530, introduced February 2026, proposes a 3.5% annual rent cap and a one-month security deposit limit, but it has not been enacted.

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Official Illinois Sources & Resources

Understanding Illinois Rent Increase Laws

Whether a Illinois rent increase is legal depends on the cap (if any), the notice given, and whether the increase is retaliatory. Illinois rent increase laws protect tenants from surprise hikes by requiring a minimum notice period before any increase takes effect.

If you believe a Illinois rent increase violates these rules, document the notice you received, check the math against the cap, and contact your local housing authority or legal-aid office.

Knowing the Illinois rent increase rules before your lease renews puts you in a much stronger position.

This Illinois rent increase guide was last verified against official sources in June 2026. Rent caps change — verify with your state or a local legal-aid office.

More Illinois Tenant Rights Guides

Disclaimer: This guide is informational only and is not legal advice. Landlord-tenant laws change and vary by city and county within a state. Verify current rules with your state, your local court, or a free legal-aid office before acting. If you are facing eviction, contact a local tenant attorney or legal-aid organization right away.

Renting? Protect your belongings — compare renters insurance at Home Insure Guide. Divorce involving a lease? See Divorce Help Guide. Unsafe housing / toxic mold injury? Some cases qualify — see Mass Tort Info.