The Illinois Eviction Process: A Step-by-Step Legal Guide

Evicting a tenant in Illinois is orderly and predictable when you follow the statute in the right sequence: confirm valid grounds, serve the correct written notice, wait out the notice period, file the eviction action in Circuit Court, win on the return date, obtain an order of possession, and let the sheriff carry out the move-out. Illinois eviction is governed by the Forcible Entry and Detainer Act at 735 ILCS 5, Article IX, and, in the Chicago area, by powerful local ordinances that add tenant protections and slow the clock. Miss a step or fold late fees into a rent demand and an Illinois judge will dismiss the case, costing you weeks of lost rent and a fresh start. This guide walks the entire Illinois process end to end, flags the mistakes that get cases thrown out, covers Cook County and Chicago nuances, timelines, and costs, and shows the one thing that prevents most evictions: thorough screening before you hand over the keys.

Two things make Illinois distinctive. First, the notice periods and their exact wording are set by statute and enforced strictly: the five-day pay-or-quit demand must state only the rent owed, and courts routinely void notices that pad the number with late fees. Second, geography changes the rules. A rental inside the City of Chicago answers to the Chicago Residential Landlord and Tenant Ordinance and the Fair Notice Ordinance on top of state law; a rental elsewhere in suburban Cook County answers to the Cook County Residential Tenant and Landlord Ordinance; and a downstate rental typically follows the statewide Act alone. Everything below is built on the statewide framework, with the Chicago and Cook County overlays called out where they matter.

Below, a short overview video summarizes the Illinois process; the sections that follow break down each stage in detail — grounds, the notice, filing in Circuit Court, the hearing, and the order of possession — plus the Cook County and Chicago overlays, timelines, costs, tenant defenses, landlord mistakes, and the screening step that keeps most Illinois landlords out of court entirely.

Illinois eviction is a lawsuit, historically called a forcible entry and detainer action and now simply the eviction action, governed by 735 ILCS 5, Article IX (sections 9-101 through 9-321). It is a summary proceeding, meaning it is designed to move faster than an ordinary lawsuit because possession of a home is at stake. Because it takes away a person’s residence, the statute surrounds it with strict procedural protections, and that is exactly why precision matters: the Illinois process rewards the landlord who follows every step and punishes the one who cuts corners.

The layer that trips up new Illinois landlords is geography. Statewide law applies everywhere, but two large jurisdictions add their own rules on top:

Before serving any notice, confirm your reason to evict is legally recognized in Illinois. A court will dismiss an eviction filed without valid grounds, and you will lose the weeks it took to get there. The grounds also determine which notice you must serve — get the grounds right and the correct Illinois notice follows.

The Common Illinois Grounds and the Notice Each Triggers

Nonpayment of Rent

The most common ground in Illinois. When rent is unpaid past any grace period in the lease, you serve a five-day notice under 735 ILCS 5/9-209 demanding the exact base rent due. If the tenant pays the full amount within the five days, the tenancy continues and you cannot proceed. The single biggest Illinois trap here is the amount: the demand must state only the actual rent owed, not late fees, utilities, or damages, and an inflated figure voids the notice. Our guide on how to deal with a non-paying tenant covers the demand, partial-payment traps, and payment plans in depth.

Lease Violations

For a material breach of the lease other than nonpayment — an unauthorized pet, an extra occupant, property damage, or a repeated nuisance — Illinois uses a ten-day notice under 735 ILCS 5/9-210. Note a quirk of Illinois law: the ten-day notice for a lease violation does not, by statute, have to offer a chance to cure. Many landlords still word it as a cure-or-quit to be safe and to preserve the tenancy where the breach is minor and fixable, but the statute itself allows a straight ten-day termination for a lease violation. If the lease has an attorney-drafted breach clause, follow its wording.

Holdover and Termination of Periodic Tenancies

When a fixed-term Illinois lease ends and the tenant stays without a renewal, they become a holdover, and you may terminate the tenancy with proper notice. To end a month-to-month tenancy, serve a thirty-day notice under 735 ILCS 5/9-207; for week-to-week, seven days; for a year-to-year tenancy, sixty days under 9-205. In most of Illinois no cause is required to end a periodic tenancy, but Chicago’s Fair Notice Ordinance layers a tenancy-length rule on top (covered below), and just-cause protections apply in some circumstances, so a downstate no-cause termination and a Chicago one are not the same.

The notice is the foundation of the entire Illinois case. If it is defective — wrong type, wrong period, wrong rent amount, or improperly served — the court will dismiss the eviction and you must start over. More Illinois cases are lost on notice defects than on any other single mistake, so this step deserves your full attention.

The Illinois Notice Types

These are the statewide Illinois periods. In Chicago, the Fair Notice Ordinance changes the advance notice for ending a tenancy, declining to renew, or raising rent based on how long the tenant has lived there — thirty days under six months, sixty days from six months to three years, and one hundred twenty days beyond three years — and those tiers do not apply to a termination for nonpayment or a lease violation. Look up your property’s exact rules on the Illinois eviction notice laws page before you draft anything.

What a Valid Illinois Notice Must Contain

1. Every adult tenant’s name exactly as it appears on the lease — omitting one is a common, fatal error.
2. The full property address, including the unit number.
3. For a five-day notice, the exact base rent owed — Illinois courts require the actual rent figure and reject notices that add late fees, utilities, or other charges.
4. The deadline to pay, cure, or vacate, stated clearly.
5. The consequence — that an eviction action will follow if the tenant does not comply.
6. The date and signature of the landlord or authorized agent, with proof of service attached.

How to Serve It in Illinois

Notice content is only half the battle; how you deliver it decides whether an Illinois court accepts it. Approved methods under the Act, from most to least defensible:

This is the section most out-of-state and first-time Illinois landlords miss, and it is where cases quietly fall apart. On top of the statewide Act, two local ordinances add tenant protections and procedural duties that can slow or defeat an eviction if ignored.

The Chicago Residential Landlord and Tenant Ordinance (RLTO)

Inside the City of Chicago, the RLTO (Municipal Code Ch. 5-12) governs most residential rentals. Its main exemption covers owner-occupied buildings with six or fewer units, but do not assume you qualify; the exemption is narrow. The RLTO imposes duties that become eviction defenses when skipped: the landlord must attach an RLTO summary to the lease, follow strict security-deposit interest and handling rules, and maintain the unit to a habitability standard. A tenant can raise a habitability defense under RLTO Section 5-12-110 — that the landlord failed to keep the unit in compliance with the code — and can counterclaim for RLTO violations. An illegal lockout in Chicago is especially costly: the RLTO lets the tenant recover two months’ rent or twice the actual damages, whichever is greater, plus attorney fees.

The Chicago Fair Notice Ordinance

Amending the RLTO, Chicago’s Fair Notice Ordinance sets a tiered advance-notice rule that scales with how long the tenant has lived in the unit. To end a tenancy, decline to renew, or raise rent, a Chicago landlord must give at least thirty days’ notice for a tenancy under six months, at least sixty days for six months to three years, and at least one hundred twenty days beyond three years. These tiers apply to formal leases, month-to-month agreements, and even verbal arrangements, and unlike the RLTO’s small-building exemption, they apply to all Chicago landlords. Importantly, the tiered notice does not apply to a termination for nonpayment of rent or a material lease violation — those still run on the statewide five-day and ten-day notices.

The Cook County Residential Tenant and Landlord Ordinance (RTLO)

For rentals in suburban Cook County — that is, in the county but outside the City of Chicago — the Cook County RTLO, effective June 2021, mirrors much of the Chicago RLTO across the rest of the county. It carries its own disclosure, security-deposit, and notice rules, and requires landlords to provide an RTLO summary. Three municipalities are carved out because they maintain their own comparable ordinances: Evanston, Oak Park, and Mount Prospect. In those towns you follow the local ordinance, not the county RTLO. Everywhere else in suburban Cook County, the RTLO applies.

Once the notice period expires and the tenant has not paid, cured, or vacated, file your eviction action — the Complaint for Eviction — in the Circuit Court of the county where the property sits. In Cook County these are handled in the First Municipal District (Chicago) or the appropriate suburban municipal district. Every extra day is lost rent, but never file before the period ends: filing even one day early causes dismissal. Our overview of what an unlawful detainer is explains why this summary action moves faster than an ordinary lawsuit.

What to File in Illinois

• The completed Complaint for Eviction (the standardized Illinois Supreme Court eviction forms, or an attorney-drafted complaint)
• The eviction summons for the court to issue
• A copy of the signed lease
• A copy of the notice you served, with the proof-of-service affidavit
• A rent ledger showing every charge, payment, and the running balance
• The filing fee (a court cost that generally runs from about eighty to a few hundred dollars, depending on the county and the amount claimed)

The Summons and the Return Date

After you file, the court issues a summons that must be served on the tenant by the sheriff or a court-appointed special process server — a separate step from the eviction notice. The Illinois summons sets a return date, the day the tenant must appear in court, generally a couple of weeks out. Unlike some states, an Illinois eviction defendant is often not required to file a written answer in advance; appearing on the return date is enough to contest. If the tenant does not appear, the landlord can ask for an order of possession by default.

On the return date, the case is either resolved or set for trial. Uncontested Illinois cases are often decided the same day: if the tenant fails to appear, the court can enter an order of possession by default; if the tenant appears and does not dispute the facts, judgment may follow quickly. If the tenant contests, the court sets the matter for a hearing, sometimes the same day for simple disputes. Illinois judges decide these cases almost entirely on documentation, so preparation, not eloquence, wins.

What to Bring to the Illinois Hearing

• The original signed lease
• The original notice with the proof-of-service affidavit
• A rent ledger showing all charges, payments, and the balance
• Copies of every written communication with the tenant
• Photos or documentation of any lease violations or property damage
• For Chicago or suburban Cook County units, proof you provided the RLTO or RTLO summary and met habitability duties

Common Illinois Tenant Defenses and How to Counter Them

A tenant who genuinely will not leave despite a valid case can still drag things out. Our guide on what to do when a tenant won’t leave covers the tactics tenants use and how to keep the case moving.

Winning the judgment does not put you back in the unit — it earns you the right to have the tenant removed. That final removal runs on its own track and, in Illinois, only the sheriff may carry it out.

How long an Illinois eviction takes depends heavily on where the property sits. Downstate cases move fastest; Cook County and Chicago run slower because of court volume and local ordinances. Use these ranges to set expectations, then confirm your own county’s specifics.

For the process in other states, several have a dedicated guide — for example the California eviction process and the Texas eviction process — and the national how to evict a tenant overview walks the general sequence.

The out-of-pocket fees are only part of the picture, and usually the smaller part. Think of an Illinois eviction cost in four buckets, then compare the total against the cost of preventing it. All figures below are stated in words on purpose, because the ranges shift by county and year.

• Filing fee. A court cost that generally runs from about eighty dollars to a few hundred dollars, depending on the county and the amount of rent claimed.
• Service fee. Sheriff service of the summons typically costs roughly sixty to a hundred and twenty dollars; a private special process server can cost more.
• Sheriff writ and lockout. Executing the order of possession usually adds about another hundred to two hundred dollars in Illinois.
• Attorney fee. Optional for a straightforward default, but a contested Cook County case can add anywhere from several hundred to several thousand dollars in legal fees.
• Lost rent and turnover. Almost always the biggest cost — the rent you never collect while the case runs, which in Cook County can stretch across multiple months, plus cleaning, repairs, and re-renting.

Illinois judges dismiss eviction cases for procedural defects far more often than for weak facts. Avoid these and you avoid most of the delays that plague landlords.

1. Padding the five-day notice. Adding late fees, utilities, or other charges to the rent demand is the number-one Illinois dismissal reason. State the exact rent owed and nothing else; pursue late fees separately.

2. Skipping the local ordinance. Serving a bare statewide notice on a Chicago or suburban-Cook-County unit without the required RLTO or RTLO summary, the correct Fair Notice tier, or habitability compliance hands the tenant a defense.

3. Self-help eviction. Changing locks, removing belongings, or cutting utilities is illegal in Illinois and, in Chicago, exposes you to two months’ rent or double damages plus attorney fees.

4. Filing before the notice period expires. Even one day early causes dismissal. Count carefully, exclude the service date, and account for any mailing days.

5. Improper service. A texted notice, a note under the door, or a windshield drop with no affidavit is not legal service in Illinois. Use an approved method and keep the proof.

6. Accepting rent after the notice. Taking a payment after serving a five-day notice can waive it and force you to start over. If you must accept money, do it with a written reservation-of-rights letter.

7. Retaliation or discrimination. Filing soon after a code complaint invites a defense under the Landlord Retaliation Act, 765 ILCS 721, and a rebuttable presumption of retaliation if the filing lands within one year of the protected conduct; a motive tied to a protected class invites a fair-housing counterclaim. Document a legitimate, contemporaneous reason.

Because an Illinois eviction is slow and expensive, especially in Cook County, a resolution that keeps a payment coming or clears the unit sooner is often the better business decision — even when you would win in court.

Put any alternative in writing. A cash-for-keys deal, in particular, should be a signed agreement specifying the move-out date, the condition of the unit, and that the payment is contingent on the tenant leaving on time and turning over the keys.

Every experienced Illinois landlord learns the same lesson: the surest way to avoid an eviction — and the Cook County calendar that comes with it — is to avoid renting to someone likely to require one. Nonpayment, repeat violations, and prior evictions are rarely random; they usually leave a paper trail an applicant’s history reveals before they ever get the keys. Thorough screening is not about being harsh; it is about matching the right tenant to your property so the relationship never reaches a Circuit Court return date.

A comprehensive tenant screening report surfaces the red flags that predict trouble: a prior Illinois eviction filing or judgment, unpaid collections, a pattern of late payments, income that does not support the rent, or a criminal record relevant to safety. Reviewed fairly and consistently — and in compliance with the Fair Credit Reporting Act, the Fair Housing Act, and the Illinois Human Rights Act — that information lets you approve strong applicants with confidence and decline the ones who would likely have you back in this guide six months later.

Weigh the numbers. The cost of screening an applicant is a small, one-time fee. The cost of a single Illinois eviction — filing, service, possibly an attorney, and months of lost rent and turnover — runs into the equivalent of multiple months’ rent. Screening is the cheapest insurance an Illinois landlord can buy.

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