Late Rent Notice Requirements in Illinois 2025

Grace period, late fee cap, and pay-or-quit notice rules , 735 ILCS 5/9-209 (Chicago: RLTO § 5-12-140)

5 days Grace period before late fee / notice

5 days Pay-or-quit notice period

None / Lease Late fee cap

$1,021/mo Statewide median gross rent (ACS 2023)

Illinois Quick Rule:
 Illinois courts have recognized a customary 5-day grace period before a valid 5-day pay-or-quit notice can be served, though not codified statewide. Chicago RLTO caps late fees at 5% of past-due rent per month. Authority: 735 ILCS 5/9-209 (Chicago: RLTO § 5-12-140)

In Illinois, you cannot file an eviction for unpaid rent until you have served a written 5-day notice, also called a demand for rent. The rule comes from 735 ILCS 5/9-209, and the details matter: courts routinely dismiss eviction cases where the notice period, service method, or required language is wrong. Get the notice right and you protect your filing date; get it wrong and you start over.

This page covers what a valid Illinois notice must say, how to serve it, how to count the days, and the tenant cure rights that apply in Chicago and suburban Cook County. It also flags the federal 30-day notice that overrides the state 5-day rule for certain properties.

The Illinois 5-day notice under 735 ILCS 5/9-209

Once rent is due and unpaid, you may serve a written demand giving the tenant not less than 5 days to pay. This is the statutory minimum under 735 ILCS 5/9-209; you can allow more days, but never fewer. The notice must state the amount of rent owed, demand payment within the 5-day window, and state that the lease will be terminated if the tenant does not pay in full.

If the tenant fails to pay the demanded amount within the notice period, the lease is considered ended and you may file an eviction action under Article IX (735 ILCS 5/9-101 et seq.) without any further notice or demand. There is no separate month-to-month wind-down for nonpayment; the 5-day notice is what unlocks the courthouse.

Required content and the partial-payment warning

Illinois law requires a specific warning inside the notice. It must state, in substance: "Only FULL PAYMENT of the rent demanded in this notice will waive the landlord's right to terminate the lease under this notice, unless the landlord agrees in writing to continue the lease in exchange for receiving partial payment." Leaving this language out is a common defect that gives the tenant an argument for dismissal.

The practical effect: if the tenant hands you a partial payment during the 5 days, the notice stays alive and you can still proceed, so long as you did not agree in writing to accept partial rent and keep the lease going. Be deliberate about what you accept and put any deal in writing, because a casual acceptance can undercut the termination.

How to serve the notice: 735 ILCS 5/9-211

Service is governed by 735 ILCS 5/9-211, and only four methods are valid:

Hand delivery of a written copy directly to the tenant.
Leaving a copy with a person age 13 or older who resides in or is in possession of the unit.
Certified or registered mail with a return receipt signed by the tenant.
Posting on the premises, but only if no one is in actual possession.

Posting is the trap. If the tenant still lives there but is simply out of town, they remain in "actual possession" and a posted notice will not hold up, forcing dismissal. Reserve posting for genuinely vacant units. Personal delivery, with a witness or a signed acknowledgment, is the cleanest option.

Counting the days and preserving your filing

The 5-day clock starts the day after the notice is served, not the day of service. If you serve by certified or registered mail, the period runs from the day after the tenant actually receives it, which can add real time to your timeline, so factor that in when choosing a method. Keep proof of service, the exact amount demanded, and a copy of the notice; these are the first things a defense attorney will attack.

Accepting rent after the default can waive your right to terminate for that breach. If you take a payment knowing the tenant is behind, you may have to start over with a fresh notice for any new arrears.

Chicago, Cook County, and the federal 30-day overlay

In Chicago, the Residential Landlord and Tenant Ordinance (RLTO 5-12-130) still uses a 5-day notice, but adds a powerful tenant protection: a one-time right to cure. The tenant can pay the rent owed from the date of the termination notice, plus filing fees and service-of-process costs (not attorney's fees), any time before an order of possession issues, and the case must be dismissed. If that same tenant is served a second nonpayment notice later, they get only the 5 days and lose the cure-to-dismissal right. Suburban Cook County has its own Residential Tenant Landlord Ordinance (RTLO) with parallel protections.

Separately, the federal CARES Act (Section 4024) requires a 30-day notice to vacate for nonpayment at covered, federally backed properties. That statutory 30-day requirement remains in force in 2026; HUD and USDA rescinded only their own regulations, not the underlying law. If your property is covered, the 30-day federal notice controls over the state 5-day rule.

The Pay-or-Quit Notice Process in Illinois

Once rent is late and the 5-day grace period has expired, the landlord must serve a formal 5-day pay-or-quit notice (735 ILCS 5/9-209) before filing for eviction. This notice must state the total amount owed and give the tenant the option to either pay in full or vacate. If the tenant does neither, the landlord may file an unlawful detainer action in Illinois court.

Rent due date: As stated in the lease
Grace period expires: Day 5 after the due date
Pay-or-quit notice may be served: Day 6 or later
Notice period expires: Day 10 after the due date
Eviction filing permitted: Day 11 or later

Fill-In Notice Template, Illinois

NOTICE TO PAY RENT OR QUIT ILLINOIS TO: [Tenant Full Name(s)] PROPERTY ADDRESS: [Street Address, City, IL ZIP] NOTICE IS HEREBY GIVEN that rent is past due for the following period: Rental Period: [Month and Year] Monthly Rent: $[RENT AMOUNT] Balance Due: $[TOTAL OWED] The 5-day grace period under 735 ILCS 5/9-209 (Chicago: RLTO § 5-12-140) has expired. YOU HAVE 5 DAYS from the date this notice is served to either: (1) Pay the full balance of $[TOTAL OWED] to: [Landlord name and payment address or method] OR (2) Vacate and surrender possession of the premises. FAILURE to comply within 5 days will result in eviction proceedings being filed in Illinois court pursuant to 735 ILCS 5/9-209. Date Served: [Date] Landlord: [Printed Name] Signature: ___________________________ Phone: [Contact Number]

This summary reflects Illinois eviction law as of 2026, drawn from the Illinois Compiled Statutes at 735 ILCS 5/9-209 (demand for rent) and 735 ILCS 5/9-211 (service), the Chicago Residential Landlord and Tenant Ordinance 5-12-130, and Section 4024 of the federal CARES Act. Local ordinances in Chicago and Cook County change landlord obligations materially, and notice requirements are enforced strictly by the courts. This is general information for landlords, not legal advice; confirm current requirements and consider counsel before serving a notice or filing an eviction.

Frequently Asked Questions

How many days is Illinois's late rent notice?

The state minimum is 5 days under 735 ILCS 5/9-209. You may give more time but never fewer. Certain federally backed properties require a 30-day notice under the CARES Act instead.

Can I just tape the notice to the door?

Only if no one is in actual possession of the unit. Under 735 ILCS 5/9-211, posting is invalid when the tenant still lives there, even if they are temporarily away. Use hand delivery, delivery to a resident age 13 or older, or certified/registered mail instead.

What happens if the tenant pays part of the rent?

A partial payment does not void the notice unless you agree in writing to continue the lease in exchange for it. The notice must contain the required warning that only full payment waives termination. Put any partial-payment arrangement in writing.

When does the 5-day period start?

The count begins the day after service. If you serve by certified or registered mail, it runs from the day after the tenant actually receives the notice, which can lengthen your timeline.

Does Chicago follow the same rules?

Chicago uses the same 5-day period under RLTO 5-12-130 but gives the tenant a one-time right to cure by paying the rent owed plus the landlord's filing and service costs before an order of possession issues, which requires dismissal. A second nonpayment notice removes that cure-to-dismissal right.

Do I still have to give 30 days for a federally backed property?

Yes. The CARES Act Section 4024 30-day notice-to-vacate requirement for covered properties remains in effect in 2026. HUD and USDA rescinded their own regulations, not the statute, so the federal 30-day notice still controls where it applies.

Related Guides for Illinois Landlords

← Illinois Eviction Risk Overview Illinois Eviction Notice Templates Illinois Security Deposit Limits Illinois Rent Increase Calculator Late Rent Rules, All States

Data sourced from Illinois published statutes (735 ILCS 5/9-209), U.S. Census Bureau American Community Survey 2023 5-Year Estimates. Last updated August 28, 2026. This page is for informational purposes only and does not constitute legal advice. Consult a licensed attorney for your specific situation.