Illinois rent increase notice calculator.
Enter the current rent, new rent, and effective date. Get the required notice period and whether your effective date is legal. Built from Lease-based; 735 ILCS 5/9-207 (30-day month-to-month termination default).
Generate the Illinois rent increase notice, signature-ready, $29.
The calculator above gave you the notice period. The template below puts it on a Illinois-specific notice with the statutory wording, your tenant's name, the new rent, and the effective date filled in. Audited line by line against Lease-based; 735 ILCS 5/9-207 (30-day month-to-month termination default).
Get the Illinoisrent increase template, $29 →The statutes behind this calculator.
Illinois has no statewide advance notice specific to rent increases. 735 ILCS 5/9-207 sets 30 days as the month-to-month termination default, which landlords treat as the minimum for rent changes. No state rent cap; local rent control is preempted statewide.
- ·Illinois has no statutory advance notice specific to rent increases
- ·Chicago Residential Landlord and Tenant Ordinance (RLTO) applies to most Chicago units but does not cap rent
- ·735 ILCS 5/9-207 requires 30 days notice for month-to-month termination, treated as the default
What this calculator is, and what it is not.
This calculator applies the Illinois rules as of early 2026. It is not legal advice. Housing law changes year to year and local ordinances (especially in rent-controlled cities) can apply stricter rules. For contested cases, consult a Illinois-licensed attorney.
Source: https://leasekit.io/illinois-rent-increase-calculator. Built by a small team of legal researchers and developers.