Illinois calls it an eviction action (the old "forcible entry and detainer" name was retired in 2018), and where your rental sits changes the rules more than in almost any other state: statewide law sets a 5-day demand, Chicago's RLTO lets the tenant pay to stay until the judge rules, and suburban Cook County's RTLO adds its own one-time cure. Here's the sequence, layer by layer.
This is general information for landlords, not legal advice, and BuildMyLease does not prepare eviction notices or court filings. Confirm the current rule — especially the city and county layers — with a local landlord-tenant attorney before serving or filing.
Step 1 — The 5-day demand for rent
Any time after rent comes due unpaid, you may serve a written demand under 735 ILCS 5/9-209: the lease terminates unless the tenant pays within not less than 5 days after service. Counting follows 5 ILCS 70/1.11 — exclude the day of service, and if the last day lands on a Saturday, Sunday, or holiday, it rolls to the next business day.
Two content rules decide cases:
- Only full payment cures. The notice must prominently carry the statutory sentence — "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." Without that sentence, a partial payment can undermine the notice.
- Service is prescribed (§ 9-211): personal delivery, delivery to a resident aged 13 or older, certified or registered mail with returned receipt, or posting only when no one is in actual possession.
For lease violations other than rent, the statewide instrument is a 10-day notice to quit (§ 9-210) — with no statutory right to cure. Chicago changes that, below.
Step 2 — Filing in circuit court
After the window runs, you file the eviction complaint in the circuit court of the county where the property sits. The summons sets an appearance day 7 to 40 days after issuance and must be served at least 3 days before it (Ill. S. Ct. R. 101(b)(2)). The tenant generally appears rather than files a written answer; no appearance can mean a default eviction order the same day.
There is no statutory trial deadline in Illinois — eviction cases are summary in nature, but the calendar is the court's.
Step 3 — The eviction order and the 120-day clock
Judgment for the landlord takes the form of a statewide Eviction Order, enforced only by the sheriff. There's no statutory wait between judgment and enforcement (courts often grant short discretionary stays), but there is a hard expiry: under 735 ILCS 5/9-117, an eviction order is unenforceable more than 120 days after entry unless the court extends it. In Cook County, the sheriff's queue — weeks, sometimes months — is the real timeline.
Statutory minimums sum to roughly 2.5–3 weeks; Cook County reality is commonly 2–5 months.
The Chicago layer (RLTO)
Inside the city, Mun. Code § 5-12-130 rewrites the endgame:
- Pay-to-stay until judgment. A tenant served a 5-day nonpayment notice may keep the lease in good standing by paying all back rent plus the landlord's court filing fees at any time before the judge enters the eviction order — a one-time right; a second nonpayment notice later leaves only the 5-day window.
- Breaches get a cure. The RLTO's 10-day violation notice must state the violation, and the tenant has the right to remedy it within the 10 days — unlike state law.
- Waiver by acceptance. Accepting rent due, with knowledge, after a termination notice expires waives the notice.
- Fair Notice for non-renewals. Ending or not renewing a tenancy without cause takes 30, 60, or 120 days' notice depending on occupancy length — it does not stretch the 5-day nonpayment notice.
Our Cook County & Chicago lease rules guide covers the RLTO's deposit and disclosure side.
The suburban Cook County layer (RTLO)
Outside Chicago and Evanston, the county RTLO (§ 42-809) mirrors the state 5-day notice but adds: a one-time post-filing pay-and-stay (all rent plus filing and service costs — not attorney's fees — forces dismissal), a use-it-or-lose-it rule (accepting rent after serving a notice, or failing to file within 30 days of the notice, kills the notice), 10-day breach notices with a right to cure, and a 60-day non-renewal notice (or the tenant may stay 120 days).
The traps
Self-help. Statewide, re-entry is lawful only "in a peaceable manner" (§ 9-101) — and in Chicago a lockout draws $200–$500 in fines per day plus tenant damages of twice actual damages or two months' rent (RLTO § 5-12-160); the county RTLO's lockout ban (§ 42-813) applies to every unit with no exemptions.
Retaliation. The new Landlord Retaliation Act (765 ILCS 721, effective January 1, 2025) creates a one-year rebuttable presumption of retaliation after protected tenant activity, a defense to eviction, and damages up to the greater of two months' rent or double actual damages, plus fees.
Compare all 20 states' notice rules on our eviction notice laws by state page, or start with the pay-or-quit notice glossary entry.
Common mistakes
Omitting the FULL PAYMENT sentence. Without it, partial payment can defeat the notice.
Treating Chicago and the suburbs the same. The RLTO governs the city; the RTLO governs most suburbs; Evanston has its own ordinance. Each has different cure and waiver rules.
Sitting on a served notice in Cook County. The RTLO's 30-day rule voids a notice you don't act on.
Forgetting the 120-day writ expiry. An eviction order that outlives 120 days without enforcement needs a motion to extend.
A lease built for the right jurisdiction prevents most of this: the grace period, late-fee caps (Chicago and Cook County cap them by ordinance), and notice terms all come from it. Build a compliant Illinois residential lease agreement — $29 one-time, with the RLTO/RTLO branching handled for you.
Statutory references
- 735 ILCS 5/9-209 — 5-day demand; full-payment language. § 9-210 — 10-day notice to quit. § 9-211 — service. Official text
- 5 ILCS 70/1.11 — day counting (exclude day of service; weekend/holiday rollover).
- 735 ILCS 5/9-117 — 120-day enforcement limit on eviction orders.
- 765 ILCS 721 — Landlord Retaliation Act (eff. Jan. 1, 2025).
- Chicago Mun. Code § 5-12-130 — RLTO notice, cure, and Fair Notice rules; § 5-12-160 — lockout ban.
- Cook County Code § 42-809 — RTLO nonpayment and cure rules; § 42-813 — lockout ban.