Illinois Rent Increase Notice Letter

State Cap: No statute. Illinois has no statewide or local limits on rent increase amounts (§ 50 ILCS 825/5).

Notice Period: At least 30 days for month-to-month tenancies. For year-to-year tenancies, landlords must provide at least 60 days‘ written notice (§ 735 ILCS 5/9-207(b)). Week-to-week tenancies require 7 days‘ notice (§ 735 ILCS 5/9-207(a)).

Proof of Service: Landlords must deliver written notice by personal delivery to the tenant, by leaving a copy with a resident aged 13 or older on the premises, or by certified or registered mail with a return receipt requested (§ 735 ILCS 5/9-211).

Prohibited Acts: Landlords cannot increase rent as retaliation against tenants for reporting housing code or habitability violations to a governmental authority (§ 765 ILCS 720/1), or for discriminatory reasons under the Illinois Human Rights Act (§ 775 ILCS 5/3-102).