Illinois Landlord-Tenant Law
The rules Illinois landlords ask about most — deposits, late fees, and required notices — in plain English.
Security deposit limit
No statutory limit
Deposit return deadline
45 days
30 days if no deductions; local ordinances (e.g., Chicago) may cap; applies to 5+ unit buildings
Late fee rules
No statutory cap (Chicago: $10 for first $500, then 5%)
Pay-or-quit notice (nonpayment)
5 days
Rent increase notice (month-to-month)
30 days
Not legal advice. This is general information for landlords and laws change — local ordinances (rent control, fee caps) may add rules. Confirm the current Illinois statute or consult an attorney before acting.
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