How long does a landlord have to return a security deposit in Illinois?

In Illinois, the security deposit and an itemized statement of any deductions are generally due generally within 30–45 days, depending on itemization and building size (765 ILCS 710). Missing the deadline can forfeit the right to withhold and expose the landlord to added damages. Confirm the current statute for your situation.

Do deductions have to be itemized?

Yes — in nearly every state a landlord must provide an itemized statement listing each deduction, not a vague lump sum. This generator lists each deduction on its own line with an amount and does the refund math.

Is the letter generator free?

Yes — free, no signup. It itemizes deductions, does the refund math, cites the state deadline, and can email the PDF so the timestamp documents timely delivery.

Free tool · No signup · Pre-set for Illinois

Illinois Security Deposit Return Law & Letter

In Illinois, the deposit and an itemized statement are generally due generally within 30–45 days, depending on itemization and building size (765 ILCS 710). Build the letter below — deductions listed line by line and the refund math done.

Start your Illinois letter →

765 ILCS 710 — the deadline to return the deposit and send the itemized statement

Illinois provides for the deposit’s return generally within 30–45 days, depending on itemization and building size (765 ILCS 710). 45 days is on the long side — 1 of the 26 states verified here allow more time, and 21 allow less.

Tenancy ends	Letter must be sent by
January 31, 2026	March 17, 2026
April 15, 2026	May 30, 2026
July 31, 2026	September 14, 2026
November 30, 2026	January 14, 2027

What the Illinois letter has to contain

Every deduction on its own line. Illinois requires an itemized statement rather than a lump sum (765 ILCS 710).
The arithmetic, shown. Deposit held, each deduction, and the balance refunded or still owed — so nothing has to be taken on trust.
Where the refund went. The forwarding address you sent it to, and how.

Proving you sent it in time

The deadline is about when the letter left, and in a dispute that is the fact in question. Email gives you a timestamp for nothing; certified mail gives you a receipt. Either beats posting it second class and hoping. Whatever you use, keep the copy you sent — a Illinois deadline you met but cannot evidence is not much better than one you missed.

Write the Illinois letter →

Working out what you can defensibly deduct is a separate job from writing the letter — that lives on the Illinois deduction page, which prorates each item by its remaining useful life.

Other states: Indiana · Kansas · Kentucky · All states

Illinois rule last checked 2026-07-23 against 765 ILCS 710. General information, not legal advice — verify the current statute before you rely on it.

Everything else we’ve researched about Illinois

Same state, the problems either side of this one. Each carries its own statute and the date we last checked it.