What Is the Maximum Security Deposit in Illinois?
Illinois has no statewide cap on a security deposit, but a strict statement and refund process for buildings of five or more units. Here is what the Act regulates, who it covers and where local rules come in.
Is there a maximum security deposit in Illinois?
Not under the statewide statutes. The Security Deposit Return Act sets no limit on the amount a landlord may collect (765 ILCS 710/1). A city or county ordinance may add one, so check yours. The Illinois security deposit limit calculator shows the deposit as months of rent.
What does the Act regulate instead?
How a lessor of five or more units may keep part of a deposit: only for damage it documents with an itemized statement within 30 days after the tenant vacated, with paid receipts, or the whole deposit within 45 days; lease-set repair costs with a copy of the lease; the lessor’s own reasonable labor; and a penalty of twice the deposit, plus costs and fees, for refusal or bad faith (710/1(a) to (c)). See the Illinois return deadlines.
Does the Act apply to small landlords?
The Act speaks of a lessor of residential real property containing five or more units. A landlord of a duplex or a single-family home is outside it, and the lease and any local ordinance decide how the deposit comes back.
What about interest?
A separate Act is reported to require interest on deposits held six months or more in buildings or complexes of 25 or more units. This page does not analyze it; ask the landlord in writing whether it applies and keep the answer.
What should a tenant ask before paying?
How much in total, what each payment is for, whether the lease sets repair costs, where the deposit is held and whether interest is owed. Get the answers in writing, keep every receipt and photograph the unit at move-in.
What can a tenant do about an excessive deposit?
There is no state cap to enforce, so look at the lease and any local ordinance. Chicago, for example, has its own rules. Legal aid or a licensed Illinois attorney can tell you whether an ordinance applies to your home.
Worked examples
| Monthly rent | Payment | Result |
|---|---|---|
| $1,600 | $1,600 deposit | One month; no state cap |
| $1,600 | $4,800 deposit | Three months; no state cap |
| $1,600 | $3,200 deposit, four-unit building | The state Act does not apply |
A checklist for landlords
State in the lease what the deposit is for; fix repair costs in writing if you want to use them; keep a move-in condition record; send the statement and receipts on time; and never charge normal wear and tear.
Why no cap does not mean no protection
Without a statewide cap, a tenant’s protection comes from the lease and from the return rules. Read what the lease says the deposit may be used for, and whether it fixes repair costs. Photograph the unit and sign a move-in condition list. Keep the receipt, and when you leave give your address in writing so the landlord’s 30-day and 45-day clocks start from a date you can prove.
A checklist for landlords
State in the lease what the deposit is for; if you want to use lease-set costs, list them by building component; keep a move-in condition record; send an itemized statement with receipts within 30 days; return the whole deposit within 45 days if you do not; and never charge normal wear and tear.
Where to get help
Legal aid and the circuit clerk can explain how a deposit dispute is brought. Bring the lease, every receipt and the date you vacated.
Why a deposit can be high in Illinois
Without a cap, a landlord can set the deposit by risk, such as a higher amount for a pet, a short credit history or a furnished unit. A tenant can negotiate it, ask for a smaller deposit with a longer lease, or ask to pay in installments, and should get any agreement in writing.
Frequently asked questions
How much can an Illinois landlord charge for a security deposit?
The statewide statutes set no maximum.
Is there a cap in Chicago?
Local ordinances may differ; check the ordinance for your city.
When must an Illinois landlord return the deposit?
Within 30 days with a statement, or 45 days for the whole deposit, in buildings of five or more units.
Does a landlord pay interest?
A separate Act is reported to cover large buildings.
Where is the rule written?
In 765 ILCS 710/1.
Official sources
A local landlord-tenant attorney can review your situation — many offer a free consultation.
This is general information, not legal advice. It is based on the cited Illinois statutes, rules and court opinions, and every case turns on its own facts. Confirm how the law applies to your situation with a licensed Illinois attorney.