Illinois Rent Increase Laws: Rules, Limits, and Notices

Unlike states with robust tenant stabilization acts, Illinois gives property owners immense leeway when adjusting rent prices. Understanding the notice periods is the key to legally executing rent increases.

Disclaimer: This guide provides general legal information for educational purposes only and does not constitute legal advice. Always consult a licensed attorney in Illinois for advice specific to your situation. Information last verified: March 2026.

No State or Local Rent Control

Under the Rent Control Preemption Act (50 ILCS 825), the state of Illinois explicitly bans local municipalities from enacting rent control measures.

This means that whether a property is located in rural Illinois, downtown Chicago, or suburban Cook County, there is no statutory limit on how much a landlord can increase the rent.

Required Notice Periods

While there is no maximum rent cap, a landlord cannot simply hike the rent at a moment's notice. The rules dictate when a landlord can increase rent based on the lease structure.

Fixed-Term Leases

For a tenant on a standard fixed-term lease (e.g., a one-year lease), the rent cannot be increased during the term.

Rent increases can only occur at the time of lease renewal. Landlords are generally expected to offer the new lease terms (including the rent increase) out of courtesy at least 30 to 60 days before the old lease expires, though Illinois law does not dictate a rigid timeline for fixed-term renewals state-wide unless determined by local ordinance.

Month-to-Month Tenancy

For a month-to-month tenant, a landlord must provide at least 30 days' written notice before raising the rent.

• The 30 days must correspond to a full rental period. For instance, notice given on May 15th for an increase would not take effect until July 1st.

Week-to-Week Tenancy

If renting on a week-to-week basis, the landlord must provide 7 days' written notice.

Chicago Notice Requirements (CRLTO)

If the property is located within the city limits of Chicago, the Fair Notice Ordinance significantly extends the timeline requirements for both terminating a lease and raising the rent.

If a Chicago landlord intends to raise the rent, the notice period scales with the tenant's history at the property:

• Tenancy of less than 6 months: 30 days notice
• Tenancy of 6 months to 3 years: 60 days notice
• Tenancy of more than 3 years: 120 days notice

Retaliation and Discrimination

Even without rent control, it is fundamentally illegal to raise rent based on discriminatory reasons under the Fair Housing Act.

Furthermore, under the Illinois Landlord Retaliation Act, a landlord cannot increase rent specifically to punish a tenant for exercising their legal rights, such as reporting code violations to a municipal agency, or joining a tenant's union.

Best Practices

• Communicate early: Sending a rent increase notice well beyond the minimum requirements preserves a positive landlord-tenant relationship.
• Explain the rationale: While not required, briefly explaining that a rent increase is tied to rising operational costs, property taxes, or insurance can reduce friction.

How Landager Helps

Landager’s reporting features give you insight into when leases are nearing expiration, allowing you to easily schedule targeted automated comms containing new terms and rent increases well in compliance with state notice mandates.

Back to Illinois Landlord-Tenant Laws Overview.