Rent Late Fee Calculator — Illinois
Illinois sets no fixed late-fee cap — the fee must be reasonable and written into the lease. There is no statutory grace period, but the lease may provide one.
We'll check it against your state's legal cap.
Maximum lawful late fee
No fixed cap
No fixed statutory cap — the fee must be reasonable and stated in the lease.
Not legal advice. LandlordKit provides general informational tools, not legal advice. Landlord-tenant laws change and vary by city and county. Verify the cited statute and consult a licensed attorney before acting on any result.
Illinois late fee rules
Illinois sets no fixed late-fee cap — the fee must be reasonable and written into the lease. There is no statutory grace period, but the lease may provide one.
Last verified June 1, 2026.
Illinois late fee FAQ
What is the maximum late fee a landlord can charge in Illinois?+
Illinois has no fixed statutory cap. The late fee must be reasonable and stated in the lease. No statewide cap. Chicago's RLTO caps late fees at $10/month on the first $500 of rent plus 5% of any amount above $500. (765 ILCS 705).
Is there a grace period for late rent in Illinois?+
Illinois sets no statutory grace period, though your lease may include one.
Can a late fee exceed the legal cap if the lease says so?+
No. A lease clause that sets a late fee above the state's legal limit is generally void and unenforceable, even if the tenant signed it.
Is this late fee calculator free?+
Yes — it's free and requires no signup.