Statutory Summary: 735 ILCS 5/9-207
Chicago municipal ordinance and Illinois state law enforce 30-day notice periods with proportional day billing.
General Illinois Rental Guidelines
In Illinois, the calculation method for prorated rent is primarily governed by the written lease contract. Applicable state statutes (including 735 ILCS 5/9-207) establish required notice periods for terminating month-to-month tenancies and statutory deadlines for security deposit reconciliation.
Official Sample Notice & Proration Settlement Template:
"To: [Landlord / Property Management Name]
Property Address: [Your Full Rental Address]
Please accept this letter as formal written notice pursuant to 735 ILCS 5/9-207 that I will vacate the premises on [Move-Out Date]. As our rental cycle ends on [Cycle End Date], my lawful tenancy for this final period spans exactly [Number of Days] days. Based on our monthly rent of $[Monthly Rent] and our state's calendar apportionment standards, the final prorated rent due is $[Calculated Amount]. Please direct my remaining security deposit of $[Deposit Amount] pursuant to state deposit return statutes within 30-45 Days to my forwarding address below.
Forwarding Address: [Your New Address]
Tenant Signature: _______________________ Date: ____________"
Legal & Informational Disclaimer:
The statutory summaries, notice durations, and deposit refund deadlines provided for Illinois are compiled from public state legislative codes (including 735 ILCS 5/9-207) for general computational reference. Local municipal rent stabilization ordinances (such as city rent control boards) may impose additional local restrictions. This tool provides mathematical rent apportionment and does not constitute formal legal counsel. For specific lease disputes, consult an attorney licensed in Illinois or your local legal aid society.