Rent Increase Notice Requirements in Illinois

At a glance

Illinois's current state-law rule

Illinois has no general statewide statute that tells an ordinary residential landlord to give a particular number of days before continuing a tenancy at a higher rent. Nor does current state law set a statewide percentage cap or a once-per-year limit. The lease supplies the agreed rent and any mechanism for changing it during a fixed term; a local notice ordinance may add a rule for properties within its reach.

Current 50 ILCS 825/§ 5 and § 10 address a different question: local rent control. Section 5 bars a unit of local government from enacting, maintaining, or enforcing a measure that controls the amount charged for private residential or commercial property. Section 10 applies that denial to home-rule units. Neither section creates a statewide cap.

What trips people up

Do not turn 735 ILCS 5/§ 9-207 into a rent-change notice rule. Its title is "Notice to terminate tenancy for less than a year," and its 7- and 30-day periods let a landlord terminate specified holdover tenancies and pursue eviction or ejectment. The section does not say that the landlord may preserve the tenancy and substitute a higher rent by using those periods.

A fixed-term renewal offer is also different from a unilateral change before the existing term expires. Because no general state section supplies a mid-term increase procedure, read the signed lease and any valid amendment rather than assuming that a termination-notice period rewrites the price.

The absence of a general cap does not authorize retaliation. Under 765 ILCS 721/§ 5, a landlord may not knowingly increase rent because a tenant engaged in protected good-faith activity. Section 10 gives the tenant a defense and a civil action. Available relief includes up to the greater of two months' rent or twice the tenant's damages, plus reasonable attorney fees.

Common questions

Does Illinois require 30 days' notice for a monthly rent increase?

Not under a general statewide rent-change statute. The 30-day rule in § 9-207(b) terminates certain holdover tenancies of less than a year; it does not continue the tenancy at a new price. Check the lease and applicable local notice law.

Can an Illinois city cap rent?

Not under current 50 ILCS 825/§§ 5 and 10. SB 1260 would repeal that preemption, while HB 3687 and SB 2884 would permit voter-approved local rent control. All three remain pending and therefore do not change current law.

Is every increase lawful because Illinois has no statewide cap?

No. The increase still must comply with the lease and applicable local notice rules. It also may not be knowingly retaliatory under 765 ILCS 721/§ 5.

Statutes and sources

• 50 ILCS 825/§§ 5 and 10. Current local-government and home-rule preemption of controls on rent amounts. Official text (accessed July 12, 2026).
• 735 ILCS 5/§ 9-207(a)-(b). The separate 7- and 30-day rules for terminating specified holdover tenancies. Official text (accessed July 12, 2026).
• 765 ILCS 721/§§ 5 and 10. Prohibition and remedies for retaliatory rent increases. Prohibition and remedies (accessed July 12, 2026).
• SB 1260, HB 3687, and SB 2884 (104th General Assembly). Pending local- rent-control preemption proposals. SB 1260, HB 3687, and SB 2884 (checked September 9, 2026).