Security Deposit Rules
in Your Lease
What it actually means, what Illinois law says, what's specific to Chicago - and exactly what to do. In plain English.
Quick Summary - What You Need to Know
- Illinois places no statewide cap on what a landlord can charge you for a security deposit.
- Chicago requires your deposit to sit in a separate federally insured Illinois account, never mixed with the landlord's money.
- Interest is owed on any Chicago deposit held longer than six months, at the City Comptroller's published rate.
- Illinois' itemization rule only reaches buildings with five or more units, leaving smaller two- and three-flats outside it.
- A Chicago landlord who breaks the deposit rules owes the tenant two times the deposit plus interest.
Understanding the Security Deposit Rules
Chicago is one of the rare places where the deposit rules matter far more than the deposit amount. Illinois sets no cap on what a landlord can ask for, but the city's ordinance controls exactly where your money sits, what it earns, and when it comes back.
That's not a technicality. A Chicago landlord who mishandles the account or skips the receipt owes you two times the deposit plus interest, which is why so many buildings here quietly stopped taking deposits at all.
What renters assume
Most renters assume Illinois caps deposits at one or two months' rent like the states they hear about, and that anything bigger must be illegal.
What is actually true
There's no cap at all, so a Chicago landlord can ask for any amount the lease says. Your protection isn't the size of the deposit; it's the separate account, the interest past six months, and the two times the deposit penalty.
No cap is real, but it's the least interesting thing about a Chicago deposit. New York and Seattle fight over how much you hand over at move-in; Chicago fights over what happens to the money afterward, and that's where landlords actually lose.
Plain English Version
Your deposit is like a coat you check at a restaurant: the staff can't wear it, can't lend it out, and has to hand it back when you leave. In Chicago the coat check also owes you a little something for holding it too long, and pays double if it goes missing.
Security Deposit Forfeiture Example - What the Wording Looks Like in Chicago, IL
The sample clause below is real lease language - a court quoted it word for word, and then ruled on it. What the judge decided is at the bottom of this block.
Find the equivalent paragraph in your own lease and read the two side by side. The wording will differ; the moving parts rarely do.
If Tenant vacates prior to the Expiration Date (as extended, if applicable), the security deposit shall be forfeited and Tenant shall be obligated for rent payments for the remainder of the term, or until the Property has been re-rented whichever is less.
Quoted from the published opinion in Cromar v. TAG Realty, LLC, No. 87780-1-I (Wash. Ct. App. Div. I, 2026). Judicial opinions are not subject to copyright; the lease language is reproduced in limited part for commentary under 17 U.S.C. § 107.
“If Tenant vacates prior to the Expiration Date (as extended”
Count the units in your building first. Illinois sets no statewide cap on the deposit amount, and the return statute applies only at five units and above - so in a three-flat, the protections you read about online may simply not reach you.
“the security deposit shall be forfeited and Tenant shall be obligated for rent payments”
Where the Act does apply, a deduction needs an itemised statement within 30 days of you vacating, with paid receipts to back it. A clause declaring the whole deposit forfeited supplies neither of those things.
“for the remainder of the term”
This is the open-ended half. Chicago landlords must make reasonable efforts to re-let, so a claim for every remaining month is a claim that assumes no effort was made - and the next limb of this very sentence contradicts it.
“re-rented whichever is less”
The cap that saves this sentence from being unlimited. Get the re-let date in writing - and if the building has five or more units, pair the request with the itemised statement the statute already entitles you to.
Held unlawful, and the tenants were awarded double damages. They broke the lease early to buy a home. The landlord issued a move-out statement headed “EARLY TERMINATION SECURITY DEPOSIT FORFEIT” and told them no refund was due. The court held the forfeiture clause could not override the statute governing what a landlord may actually keep.
One court, one lease, one state. That answer is not automatically yours, and your lease may be worded to land differently. Use this to know what to look for and what to ask - your state's tenant hotline or a local tenant attorney can answer it for your document.
Illinois Law on Security Deposit Rules
- Illinois sets no statewide maximum on the deposit amount.
- The Security Deposit Return Act only reaches residential buildings with five or more units.
- To deduct for damage, the landlord must furnish an itemized statement within 30 days of the tenant vacating, with paid receipts within 30 days after that.
- If the landlord does not comply, the full deposit is due within 45 days, and bad faith costs the landlord twice the deposit plus costs and attorney's fees.
765 ILCS 710/1 - statutes change; verify the current text for your situation.
Illinois never got around to capping deposits. Arizona won't let a landlord demand more than 1.5 months' rent and New York stops at one month, but in Illinois the number on the lease is simply the number. The state regulates the exit instead of the entrance.
The Security Deposit Return Act only reaches buildings with five or more units. In those, a landlord deducting for damage owes you an itemized statement within 30 days of move-out and paid receipts within 30 days after that; skip it and the entire deposit is due back within 45 days. Bad-faith retention costs the landlord twice the deposit plus costs and attorney's fees.
Illinois Tenant Protections
Your deposit has to be kept in a separate, federally insured Illinois account, so a Chicago landlord can't mix it with rent income or operating cash. In buildings with five or more units, Illinois gives you an itemized statement within 30 days of moving out and paid receipts within 30 days after that. If a Chicago landlord breaks the deposit rules, the ordinance awards you two times the deposit plus the interest owed.
What's Specific to Chicago
Figures are the state rule, or the stronger city ordinance where one exists. Verify the current law for your own situation before relying on it.
Chicago's RLTO is the real rulebook here, and it is dramatically tougher than state law. Your landlord has to give you a written receipt, park the deposit in a separate federally insured Illinois account with no commingling, and pay annual interest on anything held past six months at the rate the City Comptroller publishes. Break any of that and the tenant collects two times the deposit plus interest.
That penalty reshaped the market. Plenty of Chicago landlords, especially in the big Lakeview, Logan Square and Rogers Park buildings, stopped taking deposits and switched to a non-refundable move-in fee instead. Read the move-in paperwork closely, because a deposit and a fee feel identical when you're writing the check and only one of them ever comes home with you.
Your Chicago deposit belongs in a separate federally insured Illinois account. A lease that names the bank is a good sign; commingling is a violation.
Chicago requires a written receipt when you pay a deposit. No receipt is itself a violation carrying two times the deposit.
Red flag. Deposits held past six months earn interest at the City Comptroller's published rate, and a waiver clause doesn't undo the ordinance.
Red flag. A fee labeled nonrefundable is not coming back to you, no matter how friendly the leasing agent made it sound.
Sources
The law this guide relies on, and where to read it. Statutes change, so confirm the current text before you act on it.
- 765 ILCS 710/1.
Red Flags to Watch Out For
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Deposit in the landlord's own account
Chicago requires a separate federally insured Illinois account with no commingling. Mixing your deposit with operating cash is on its own worth two times the deposit.
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No written receipt at signing
A Chicago landlord must give a written receipt for the deposit. If the money moved and nothing was handed back, that gap is already a violation.
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Lease waives your deposit interest
Chicago owes annual interest on deposits held over six months at the City Comptroller's rate. A clause saying otherwise is a landlord hoping you never check.
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Deposit relabeled a move-in fee
Non-refundable fees are money you never see again. If the amount looks like a deposit but the paperwork calls it a fee, ask why before signing.
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Lump-sum deductions with no receipts
In a building with five or more units, Illinois requires an itemized statement within 30 days and paid receipts 30 days after. A round number isn't itemization.
Your Rights as a Chicago Tenant
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A separate, insured account
Your Chicago deposit must sit in a separate federally insured Illinois account, never commingled with the landlord's own funds or the building's operating money.
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Interest past six months
Deposits held longer than six months earn annual interest at the rate the City Comptroller publishes each year, paid on top of your refund.
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Itemization, then paid receipts
In buildings with five or more units, you get an itemized statement within 30 days of moving out and paid receipts 30 days after that.
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Double damages for violations
Chicago awards two times the deposit plus interest when a landlord breaks these rules, and Illinois bad faith adds costs and attorney's fees.
What To Do - Step by Step
Get the receipt in writing
Chicago requires a written receipt when you hand over a deposit. Take it at signing and store a copy somewhere you'll find it a year later.
Photograph the entire unit
Time-stamped photos of every room, appliance and existing scuff on move-in day are what beat a vague damage claim at the end.
Ask which bank holds it
Your deposit belongs in a separate federally insured Illinois account. Ask in writing where it's held; the answer, or the silence, tells you plenty.
Put your forwarding address in writing
Before you hand back the keys, give written notice of where the refund and any itemization should be mailed, and keep a dated copy.
Send a dated written demand
If nothing shows up, demand it in writing. In a building with five or more units, itemization was due in 30 days and the full refund in 45.
File in Cook County small claims
Chicago's ordinance lets a tenant recover two times the deposit plus interest, and Illinois bad faith adds costs and attorney's fees, which usually makes filing worth the afternoon.