30 days rent-increase notice.
Illinois has no rent control (it is preempted statewide) and no cap on increases. For a month-to-month tenancy, 30 days' written notice is required before raising rent.
What this means for you: Rent can rise by any amount at renewal. Some advocates push to repeal the rent-control ban, but it remains in effect.
Your next step: Confirm you received 30 days' notice for a month-to-month change and negotiate before it takes effect.
Source: Rent Control Preemption Act, 50 ILCS 825. Reviewed 2026-06-16.
More Illinois rights: Illinois security deposit · Illinois eviction · Illinois repairs · Illinois entry notice.
Rent increase in nearby states: Wisconsin (28 days rent-increase notice) · Indiana (30 days rent-increase notice) · Iowa (30 days rent-increase notice) · Missouri (30 days rent-increase notice).
General legal information, not legal advice. Laws change and vary by locality; consult a licensed attorney or your local housing authority.
Updated July 2026