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Illinois · Small claims

How to sue your landlord for your security deposit in Illinois

If your landlord ignored your letter, Illinois small claims court is built for exactly this: simple forms, low fees and no lawyer needed. Here's how it works and what to bring.

Checked against the official text on October 30, 2026 · How we check the law

$10,000

the most you can generally claim in Illinois small claims court

The basics

Court
Small Claims, part of the Circuit Court in each county
Limit
Up to $10,000.
Filing fee
Set by each county and based on the amount. Ask the circuit clerk; you can apply for a fee waiver.
Where to file
Usually the county where the landlord lives or where the rental is. In Cook County, the district for the rental or the landlord's address.
Lawyers
You can represent yourself or hire a lawyer. The deposit statute lets a winning tenant recover court costs and reasonable attorney's fees.

Before you file

  • Check the dates: was there an itemized statement with paid receipts within 30 days? If not, the full deposit was due within 45 days.
  • Make sure the landlord had your mailing or e-mail address in writing.

Not sure of the dates? Check the rules in our Illinois security deposit law guide.

Haven't sent a demand letter yet?

It's the step judges look for, and often the one that gets you paid. Get a letter citing Illinois Security Deposit Return Act, 765 ILCS 710, sent by USPS Certified Mail if you like. See it free first.

See my letter free

What you can ask for

If a court finds the landlord refused to supply the itemized statement, or supplied it in bad faith, and did not return the deposit on time, the landlord is liable for twice the deposit due, plus court costs and reasonable attorney's fees (765 ILCS 710/1(c)).

For example, if a landlord kept all of a $1,800 deposit, the most a court could award under the statute is about $3,600, if it finds the landlord refused to itemize deductions or acted in bad faith. Courts decide penalties on the facts, so ask for what the statute allows and be ready to explain why it applies.

Everything you claim, penalties included, has to fit under the court's limit, or you give up the excess by filing there.

Step by step

  1. Prepare a small claims complaint. Illinois Legal Aid Online has a free Easy Form for suing a landlord for a security deposit.
  2. File with the circuit clerk. Most filing is electronic now; the clerk's office can help self-represented filers.
  3. Serve the landlord. By the sheriff, a special process server or, in some cases, certified mail through the clerk.
  4. Prepare your evidence. Bring copies for the judge and the landlord.
  5. Go to court. Explain the dates, the amount and whether a statement with receipts arrived in time.

Illinois Court Help can answer questions about your county's process: (833) 411-1121.

What to bring

  • Your lease
  • Proof of the deposit
  • Any itemized statement with its postmark or e-mail date
  • Move-in and move-out photos
  • Your demand letter and Certified Mail receipt

Put everything in date order. Judges hear many cases a day, and a clear timeline is the most persuasive thing you can bring.

Major Illinois courts

Each of these has a self-help center or clerk who can explain local filing. Search the court's name plus “small claims” for its current forms and fees.

  • Cook County Circuit Court (Daley Center and suburban districts)
  • DuPage County Circuit Court
  • Lake County Circuit Court
  • Will County Circuit Court
  • Kane County Circuit Court
  • Winnebago County Circuit Court

Questions

How much can I sue for in Illinois small claims court?

Up to $10,000.

How much does it cost to file?

Set by each county and based on the amount. Ask the circuit clerk; you can apply for a fee waiver.

Do I need a lawyer?

You can represent yourself or hire a lawyer. The deposit statute lets a winning tenant recover court costs and reasonable attorney's fees.

Should I send a demand letter first?

Yes. A judge will want to see that you asked in writing before suing, and a letter that cites the statute often gets the deposit paid without court. Send it by Certified Mail and keep the receipt.

Sources

General information about the law, not legal advice. Laws change and courts decide cases on their facts; for advice about your situation, talk to a licensed attorney in your state. Instant Legal Letters is a self-help writing tool, not a law firm.