Illinois Rent Increase Notice

What Illinois law says

• AG page: 30 days' notice for a month-to-month lease before a rent increase.
• AG page: a landlord may raise rent by any amount with advance notice.
• AG page: Illinois does not have a rent control law.
• AG page advises checking with local government because a city or county may have its own rent control ordinance.
• The page cites no statute section for these points.

Steps for a landlord

• Give written notice of the new rent at least 30 days ahead.
• State the new amount and effective date.
• Keep a record of how and when you delivered it.
• Check your city or county ordinance for longer notice rules.

What to put in the notice

• The tenants' names and the rental address
• The current rent and the new rent
• The date the new rent starts, after the required notice period
• The date of the notice and how it was delivered
• Your name and signature

Things to watch

• The AG page gives no statute citation and says it is not the final source of law.
• The page does not address increases during a fixed-term lease; check the lease and a local attorney.
• Cities and counties can add their own rules, including rent control and extra notice requirements. Check your local rules too.

About this page

We checked this page against the official sources listed below in November 2026. Where an official page did not say something, we say so. Laws change and courts read them differently, so confirm the current rule with the statute, the court or a local attorney before you act. This is general information, not legal advice.