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

Illinois landlords have 45 calendar days after move-out to return the deposit. If the unit was vacated due to fire, the deadline is 7 days. Missing the deadline — combined with failing to provide an itemized statement — makes you liable for twice the deposit amount plus attorney fees.

What is the Chicago security deposit interest rate for 2026?

The City of Chicago set the 2026 security deposit interest rate at 0.01%. Landlords must pay interest on deposits held 6 or more months, within 30 days after the end of each 12-month rental period. You can apply it as a rent credit instead of a cash payment.

Can Chicago landlords charge more than one month's rent as a security deposit?

No. Chicago's RLTO caps security deposits at one month's rent. Illinois state law has no deposit cap, but Chicago landlords must follow the stricter local ordinance. Anything collected above one month's rent must be refunded.

Can an Illinois landlord deduct for normal wear and tear?

No. Illinois law prohibits deductions for normal wear and tear, ordinary deterioration, or typical aging — scuffed baseboards, minor wall marks, carpet wear from regular use. Deductions are only valid for damages beyond normal use, unpaid rent, or charges explicitly specified in the lease.

Illinois Security Deposit Law for Landlords - 2026 Chicago Compliance Guide

Q: What happens if a landlord wrongfully withholds a security deposit in Illinois?

A landlord who refuses to return a deposit and fails to provide a good-faith itemized statement is liable for twice the deposit amount, plus court costs and reasonable attorney fees under 765 ILCS 710. On a $2,000 deposit, that's $4,000 in damages before legal fees.

Security deposit compliance is one of the most litigated issues in Illinois landlord-tenant law. A landlord who wrongfully withholds a deposit faces damages of twice the deposit amount plus court costs and attorney fees^{765 ILCS 710}. On a $2,400 deposit, that's $4,800 in statutory damages before a single hour of legal fees.

Illinois landlords must comply with two sets of rules: the statewide Security Deposit Return Act and, for Chicago properties, the city's Residential Landlord and Tenant Ordinance (RLTO). Where they overlap, the stricter rule governs — and the RLTO is almost always stricter.

This guide covers every 2026 requirement, from collection to return, so you can protect your deposits and avoid costly disputes.

Disclaimer: This article is for informational purposes only and does not constitute legal advice. Consult a qualified attorney for guidance specific to your situation.

Illinois State Security Deposit Law: The Baseline Rules

State law governs every residential landlord in Illinois. The key statute is the Security Deposit Return Act (765 ILCS 710)^{765 ILCS 710}, which sets deadlines for returns and itemized statements, and specifies penalties for non-compliance.

Deposit Limits at the State Level

Illinois state law sets no cap on the security deposit amount. You can charge one month's rent, two months', or any amount agreed to in the lease. In practice, most Chicagoland landlords outside the city charge between one and two months' rent — more than that tends to screen out otherwise qualified tenants without adding proportional protection.

Chicago landlords are subject to a strict local cap (covered in the next section). For suburbs like Naperville, Evanston, or Schaumburg, state law applies and there's no statutory limit.

The 45-Day Return Deadline

After a tenant vacates, Illinois law gives you 45 calendar days to return the deposit^{765 ILCS 710}. The clock starts on move-out day, not when you receive written notice. One exception: if the unit was vacated because of fire damage, the deadline compresses to 7 days.

Delivery can be made in person, by mail (postmarked by the deadline), or electronically to an email address the tenant provided in writing. Whatever method you use, keep documentation — date of delivery matters if a dispute arises.

Itemized Deduction Statement: 30-Day Window

If you're deducting anything from the deposit, you must provide a written itemized statement within 30 calendar days of move-out^{765 ILCS 710}. The statement must include:

A description of each damage or charge
The dollar amount for each item
Receipts or written estimates for each deduction

Failing to deliver this statement on time forfeits your right to make any deductions. The remaining deposit must be returned in full. Courts treat missing the 30-day window strictly — a statement postmarked on day 31 is treated the same as no statement at all.

Penalties for Non-Compliance

The penalty structure under state law is what makes deposit compliance non-negotiable. When a landlord:

Fails to return the deposit within 45 days, and
Refuses to provide the itemized statement, or provides one in bad faith

…they become liable for twice the deposit amount, plus court costs and reasonable attorney fees^{765 ILCS 710}. Both conditions generally need to be present, but courts look at the totality of the landlord's conduct. A pattern of delay combined with a disputed itemization typically meets the standard.

State Interest Requirements for Larger Buildings

If you own a residential building with 25 or more units, Illinois also requires you to pay interest on security deposits held for six months or more^{765 ILCS 715}. The 2026 rate, set by the Illinois Department of Financial and Professional Regulation (IDFPR), is 0.01%^IDFPR. Interest must be paid within 30 days after the end of each 12-month rental period.

For buildings with fewer than 25 units outside Chicago, no state interest requirement applies — though Chicago's RLTO creates its own obligation for covered properties.

Chicago RLTO: Stricter Rules That Govern City Properties

If your rental property is inside Chicago city limits, the Chicago Residential Landlord and Tenant Ordinance^{Chicago RLTO 5-12-080} layers additional requirements on top of state law. The RLTO applies to most residential rentals in Chicago — with limited exceptions for owner-occupied buildings of 6 or fewer units and certain single-family homes where the owner also lives on-site.

One-Month Cap on Security Deposits

Chicago caps security deposits at one month's rent^{Chicago RLTO 5-12-080}. If your unit rents for $1,800/month, the maximum deposit is $1,800 — nothing more. Any amount collected above this must be refunded, and accepting an oversized deposit can itself create liability under the ordinance.

This is the single biggest difference from state law. If you own properties both in Chicago and in surrounding suburbs, your deposit policies must vary by location.

Mandatory Separate Interest-Bearing Account

Chicago landlords must hold security deposits in a federally insured, interest-bearing account at a financial institution physically located in Illinois^{Chicagoland Apartment Association}. Three things are prohibited:

Commingling the deposit with your personal or business operating funds
Holding deposits in a non-interest-bearing account
Using an out-of-state financial institution

If your lease is written, it must identify the financial institution by name. One narrow exception: if a tenant pays first month's rent and the deposit together in a single check or electronic transfer, you have 5 business days to separate the deposit into the required account.

2026 Interest Rate: 0.01%

The City of Chicago sets the security deposit interest rate annually. For 2026, the rate is 0.01%^{KSN Law}^{Chicagoland Apartment Association}.

The math: on a $2,000 deposit held for a full year, you owe $0.20 in interest. The amount is nominal, but the obligation isn't optional. The RLTO rules:

Interest accrues on deposits held 6 or more months
Pay within 30 days after the end of each 12-month rental period
You may apply it as a rent credit rather than a cash payment
Keep written documentation of each interest payment

Required Receipt and Lease Disclosures

Two additional disclosure requirements apply under the RLTO^Chicago.gov:

Written receipt — Provide a receipt showing the deposit amount and date when you collect it
Interest rate summary — Include the current year's City of Chicago Security Deposit Interest Rate Summary with every lease and lease renewal

The city publishes an updated summary each year. Using the prior year's version — even by accident — is a technical violation. Keep a copy of the current-year form in your leasing templates and update it each January.

What You Can and Can't Deduct

This is where most deposit disputes originate. Both state law and the RLTO are clear on the categories^{iPropertyManagement}:

Allowed Deductions	Not Allowed
Damage beyond normal wear and tear	Scuffs, minor wall marks, worn carpet
Unpaid rent or lease-specified charges	Ordinary deterioration from use
Cleaning — only if unit is left abnormally dirty	Routine turnover cleaning
Replacing locks if keys aren't returned	Repainting for standard fading

The trickiest category is cleaning. Illinois courts have found that landlords can charge for cleaning only when the unit is left in a genuinely abnormal condition — not just different from your preference. "I always repaint between tenants" isn't a deductible expense. "Tenant burned a hole in the carpet and left three bags of garbage" is.

Document move-in and move-out conditions with timestamped photos and a signed room-by-room checklist. That documentation is your primary defense if a deduction is challenged.

How 2026's New Fee Rules Affect Deposits

Starting July 1, 2026, Illinois law prohibits landlords from collecting both a security deposit and a move-in fee on the same lease. You must choose one or the other. Landlords who have historically used both — a deposit for damages and a non-refundable move-in fee for administrative costs — need to revise their lease templates before summer leasing season.

For a full breakdown of the 2026 fee restrictions, including limits on application fees and the prohibition on lease renewal fees, see our guide to Illinois rental law changes for 2026.

Security Deposit Best Practices for Chicagoland Landlords

Document the Move-In Condition Thoroughly

A room-by-room inspection checklist, signed by the tenant at move-in, is the most valuable tool you have. Photos with timestamps give you a baseline record. Store both in a permanent file — you may need them months or years later.

Open a Dedicated Account for Each Property

Keep deposits in a separate account — not mixed with rent income or operating funds. Some landlords use one account per building with a spreadsheet tracking each tenant's balance. Either approach works as long as the funds are clearly segregated. This is mandatory in Chicago and smart practice everywhere.

Send the Itemized Statement Early

You have 30 days to deliver the statement and 45 days to return the deposit. Don't wait. Complete the move-out inspection within a week, get estimates quickly, and aim to send the statement and remaining deposit together within 3 to 4 weeks. Early returns reduce disputes and build the kind of reputation that attracts reliable tenants during spring leasing season.

Track Interest Annually for Chicago Properties

Set a calendar reminder for each tenant's lease anniversary. Calculate the interest owed (at 0.01% of the deposit held), document it in writing, and either apply it as a rent credit or pay it directly. It's a tiny dollar amount — but forgetting it creates unnecessary exposure under the RLTO.

Suburbs Outside Chicago: State Law Only

If your rentals are in Evanston, Naperville, Oak Park, Schaumburg, or other Chicagoland suburbs, the Chicago RLTO doesn't apply. You follow Illinois state law: no deposit cap, no mandatory separate account, and no citywide interest rate requirement (unless your building has 25+ units, triggering the statewide interest act).

A few suburbs have adopted their own landlord-tenant ordinances that mirror the RLTO in some ways — Evanston is the most notable. Before assuming state-only compliance applies to a specific suburb, check the local municipal code or get an attorney's opinion.

If you're managing rentals across multiple Chicagoland locations and want help staying ahead of deposit compliance, explore our rental management services or review our pricing. You can also call us at (708) 401-7658.