Illinois Month-to-Month Lease Agreement

Last Updated: May 20, 2025 by Roberto Valenzuela

A Illinois month-to-month rental agreement is a contract (not necessarily in writing) for a tenant to rent property from a landlord, one month at a time, in exchange for a fee (“rent”). The agreement renews monthly, until either party gives proper notice to end it.

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For information about Illinois fixed-term leases (rentals for a term of one year or more), click here.

Basics of an Illinois Month-to-Month Rental Agreement

In Illinois, a landlord and tenant create a month-to-month lease by agreeing to rent a property according to acceptable terms. Written agreements are clearer and more reliable in case of disagreement, but month-to-month oral (unwritten) leases are legal.

Parties under a month-to-month lease have full rights under Illinois landlord-tenant law. The tenant must use the property in a responsible way and pay rent on time. The landlord must ensure the tenant’s quiet enjoyment of the property. This includes keeping critical features of the property in good working condition.

The main difference between a month-to-month lease and a fixed-term lease is that month-to-month leases can be terminated (with proper notice) by either party, for any reason, without penalty. Landlords also can usually modify terms from one month to the next, again with proper notice.

Required Disclosures for Month-to-Month Rentals in Illinois

Illinois landlords may not rent a property out without making the following disclosures to a potential tenant, as relevant:

  • Radon Hazard Disclosure – Illinois landlords must provide all new tenants with a state-approved pamphlet warning about the dangers of radon exposure. The law also requires copies of any records or reports which might indicate a radon hazard on the premises.
  • Shared Utilities – Illinois landlords must disclose how utilities are billed on properties which share a utility meter with other units. The Tenant Utility Payment Disclosure Act provides the specific requirements.
  • Carbon Monoxide Detector Disclosure – Illinois landlords must comply with the Carbon Monoxide Detector Act by providing tenants with information about a property’s carbon monoxide detector testing and maintenance history.
  • Smoke Detector Disclosure – Illinois landlords must comply with the Smoke Detector Act by providing tenants with information about a property’s smoke detector testing and maintenance history.
  • Concession Granted Disclosure – Illinois landlords must, in writing, disclose any concession for rent that they grant.
  • Lead-Based PaintLandlords must provide an EPA-approved disclosure and informational pamphlet to tenants renting any property built before 1978.
  • Flood Zone: Illinois rentals must provide a disclosure if they’re on a lower level or fall within a FEMA flood zone. The law provides a sample disclosure which covers all required elements.

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The state page for fixed-term leases may have more detailed information on required disclosures.

Required Notice To End a Month-to-Month Rental in Illinois

Illinois lets both the landlord or tenant end a month-to-month lease with at least 30 days of advance notice. Notice must be in writing. In general, it’s valid to end a month-to-month lease for any reason that isn’t landlord retaliation.

Required Notice To Raise the Rent on an Illinois Month-to-Month Lease

Illinois requires written notice to raise the rent. There’s no particular timeframe specified in the law. This means in most cases it’s reasonable for a landlord to keep the same standard advance notice provided for termination or other major lease changes. In Illinois this is 30 days.

Eviction in Illinois Month-to-Month Rentals

Illinois tenants may get evicted if they violate lease terms or stay on the property after the notice period allowed by a valid termination. Evictions in Illinois can take as few as two weeks, but also as long as five months or more.

For more information on the eviction process in Illinois, click here.

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