Free Illinois Security Deposit Return Letter

An Illinois security deposit return letter is the written accounting a landlord delivers with the deposit refund, or with the explanation of what was withheld, at the end of a tenancy. Under the Security Deposit Return Act, 765 ILCS 710, a landlord of a building with five or more units who keeps any part of the deposit for damage must furnish an itemized statement with paid receipts within 30 days of the date the tenant vacated; if no compliant statement is furnished, the full deposit is due within 45 days. Our Illinois security deposit laws guide covers the wider framework, and the tenant screening laws by state hub helps you place tenants who leave the unit clean in the first place.

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Video: a plain-language walkthrough of the Illinois deposit return letter – the 5-unit threshold, the 30-day itemization and 45-day return deadlines, and the double-damages penalty.

Generate Your Illinois Return Letter

Complete the form below to build a return letter ready to print, sign, and send by certified mail. Fill in the deposit math, itemize each deduction with a specific description, and the generator calculates the refund balance and assembles a dated, signed PDF letter automatically. Every figure you enter flows straight into the document.

Illinois’s Distinctive Deposit Return Framework

Illinois layers its deposit rules in tiers, and the tier you are in decides which deadlines and penalties apply. The core statute is the Security Deposit Return Act, 765 ILCS 710, and its single most consequential feature is a size threshold: it governs only residential buildings with five or more units. A landlord of a four-unit building or a single-family rental is outside the state itemization requirement, while a landlord of a five-unit building is squarely inside it. Confirm the unit count before you assume the Act applies, because the wrong assumption drives the wrong deadline.

On top of the Return Act sits the Security Deposit Interest Act, 765 ILCS 715, which adds an interest duty for the largest buildings: a landlord of a building with 25 or more units must pay interest on a deposit held more than six months. And above both sits local law. The Chicago Residential Landlord and Tenant Ordinance applies to most rentals in the city regardless of size and is stricter than the state framework on both timing and interest, so a Chicago landlord usually has duties even where the state Act would not reach.

About the Illinois Return Letter

The return letter is the document that proves the landlord did the accounting the law requires. Under 765 ILCS 710, when a five-or-more-unit landlord withholds any part of the deposit for damage, the letter must carry an itemized statement of the damage allegedly caused and the estimated or actual cost to repair or replace each item, with the paid receipts attached or copies of them. The letter ties the deposit decision to a written record the landlord can later produce in court.

The document does three things at once. It satisfies the statutory duty to communicate the deposit decision in writing. It gives the tenant a concrete accounting to review and, if warranted, to dispute. And it creates a contemporaneous record that answers a later challenge to the deductions. Without a properly delivered letter, even legitimate deductions are exposed, because the Act forfeits the right to withhold when the statement and receipts are not furnished on time.

The 30-Day and 45-Day Deadlines

Two deadlines run in parallel, and confusing them is the most common Illinois error. If the landlord claims any deduction for damage, the itemized statement with paid receipts must reach the tenant within 30 days of the date the tenant vacated. If no compliant statement and receipts are furnished, the landlord must return the full deposit within 45 days of the date the tenant vacated. The 30-day window is the deduction window; the 45-day window is the no-deduction backstop. Both run from the date of vacatur, not from the date a forwarding address is provided, so a landlord who waits for an address before starting the accounting can blow the deadline before the address ever arrives.

The Bad-Faith Standard and Double Damages

The penalty is what gives the deadlines their teeth. Under 765 ILCS 710/1, if a court finds that the landlord refused to supply the required itemized statement, or supplied it in bad faith, and failed or refused to return the deposit due within the time limits, the landlord is liable for an amount equal to twice the deposit, together with court costs and reasonable attorney’s fees. Missing the 30-day itemization deadline also forfeits the right to deduct at all, so the full deposit must then be returned regardless of the actual damage.

Interest on the Deposit

Whether interest is owed turns on building size and location. Under the Security Deposit Interest Act, a landlord of a building with 25 or more units must pay interest on a deposit held more than six months, paid within 30 days after the end of each 12-month rental period, in cash or as a credit toward rent. Chicago is stricter: its ordinance requires interest for buildings with more than six units. If interest applies, include it in the accounting on the return letter so the refund figure is complete.

What to Send With the Return Letter

A complete deposit-return package usually includes:

• The return letter itself – generated above, signed and dated.
• The refund check – for the calculated balance, if any.
• Paid receipts for each deduction – the statute requires them for a five-or-more-unit building withholding for damage.
• The move-in and move-out condition record – it establishes baseline condition against end-of-tenancy condition.
• Dated move-out photographs – paired with the condition record.
• A copy of the lease – for any deposit provisions it contains.

Send the package by certified mail with return receipt to the forwarding address, retain the mailing receipt, and keep copies of everything for at least four years.

Wear and Tear Versus Damage

Illinois treats normal wear and tear as the gradual deterioration of the unit from ordinary use over time – faded paint, minor carpet wear in walking paths, small scuff marks near door handles, and minor nail holes from hanging pictures. Damage is harm beyond ordinary use – large holes in walls, carpet stains or burns, broken fixtures, pet urine damage, smoke damage, missing items, or deliberate alterations. Only damage is deductible. The move-in and move-out condition records and the dated photographs are the evidence that separates one from the other, which is why a thorough Illinois move-in and move-out checklist is the upstream document that makes a defensible deduction possible.

Common Landlord Mistakes in Illinois

The most-litigated Illinois deposit disputes share a short list of errors:

• Assuming the state Return Act covers a single-family or small multi-unit rental, when the five-unit threshold and the Chicago ordinance are what actually decide coverage.
• Furnishing estimates instead of the paid receipts the statute requires within 30 days.
• Confusing the 30-day itemization deadline with the 45-day full-return deadline.
• Starting the clock from the forwarding-address date rather than the vacatur date.
• Missing the Chicago interest duty, which is separate from the state framework and reaches smaller buildings.

Local Illinois Jurisdictions

Local ordinances can impose procedural duties beyond 765 ILCS 710:

• Chicago – Residential Landlord and Tenant Ordinance (Municipal Code, Chapter 5-12), stricter timing and interest duties that reach most city rentals.
• Evanston – a local landlord-tenant ordinance with its own disclosure and handling rules.
• Oak Park – a village landlord-tenant ordinance covering deposits and interest.
• Mount Prospect and other suburbs – local rental-licensing rules that can add inspection or registration steps.

Verify local compliance before you send the final letter, because a city ordinance can owe interest or shorten a deadline even when the state Act would not.

Tenant Screening as Prevention

The cleanest move-outs come from tenants who were screened thoroughly at the application stage. A verifiable income, a steady payment history, and a clean eviction record are the strongest predictors of a unit returned in good condition – which means a short return letter, a full refund, and no double-damages exposure. Screening is the upstream control that keeps the deposit accounting simple. Our overview of how to screen tenants step by step walks through the process, and the broader tenant screening laws by state guide covers the rules that apply when you pull a report.