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How to send a rent increase notice in Illinois

In Illinois, a rent increase notice may be delivered by hand delivery, substituted service, certified mail with electronic return receipt; certified mail is permitted.

Last reviewed September 21, 2026 · Business research, not legal advice.
RequirementIllinois rent increase notice
Delivery methodHand delivery, substituted service, certified mail with electronic return receipt — Cortul also sends a First-Class copy.
Notice periodSet by the lease or governing documents
Deemed receivedWhen the recipient signs for it
Notice must include
  • For a periodic tenancy, notice before the new rent starts equal to the notice that ends the tenancy: 7 days week to week, 30 days month to month, 60 days year to year (735 ILCS 5/9-207, 9-205)
If refused or unclaimedkeep the certified record.
Statutes

Step by step

  1. Write the notice with every required element (the Illinois template in Cortul already has them).
  2. Verify the recipient's mailing address with USPS.
  3. Send it by a method the law allows, and keep a mailed copy.
  4. Keep the mailing and tracking records, and your own record of any service you did yourself.
  5. Calendar the deadline from the mailing date.