Last updated: August 4, 2026
Illinois Security Deposit Laws 2026: Interest + 2x Penalties
Illinois has no statutory cap on security deposit amounts, but requires interest-bearing accounts and imposes severe penalties for violations. Chicago RLTO rules are significantly stricter — any violation triggers 2x deposit plus interest plus attorney fees, making it the most common source of tenant lawsuits in the state.
Key Takeaways
- No statutory limit on deposit amount (statewide or Chicago)
- Must hold in federally insured interest-bearing account (765 ILCS 710)
- Statewide: return within 30 days, pay interest annually
- Chicago RLTO (stricter): return within 45 days if deductions, provide receipts within 30 days, pay interest at city comptroller rate, provide move-in checklist
- Penalty (statewide): 2x deposit if not returned in 30 days
- Penalty (Chicago RLTO): 2x deposit + interest + court costs + attorney fees for ANY violation (including late interest payment)
- Chicago RLTO is the most common source of tenant lawsuits in Illinois
Statewide Rules (765 ILCS 710 & 715)
Two statewide statutes govern security deposits in Illinois: the Security Deposit Return Act (765 ILCS 710) and the Security Deposit Interest Act (765 ILCS 715). These apply everywhere in the state, with Chicago adding stricter requirements on top.
No Deposit Cap
Illinois has no statutory limit on the amount a landlord can charge as a security deposit. However, most landlords charge 1–1.5 months’ rent. Charging an excessive amount may be challenged as unconscionable.
Interest-Bearing Account (25+ Units)
Under 765 ILCS 715, landlords who own or manage 25 or more units must hold security deposits in a federally insured interest-bearing account and pay interest annually. The interest rate must be the rate paid by the financial institution on the account.
30-Day Return Deadline
Under 765 ILCS 710, the landlord must return the deposit (or provide an itemized statement of deductions with receipts) within 30 days after the tenant vacates. If you keep any portion, you must provide a written statement listing each deduction with the amount and attach paid receipts or estimates.
Statewide Penalty: 2x Deposit
Failure to comply with the 30-day return requirement entitles the tenant to two times the original deposit amount, plus any deposit amount wrongfully withheld. The landlord also forfeits the right to make any deductions.
Chicago RLTO Rules (Stricter)
The Chicago Residential Landlord and Tenant Ordinance imposes significantly stricter deposit requirements than statewide law. These rules apply to all residential rentals within Chicago city limits (with limited exemptions for owner-occupied 6-unit buildings). Most RLTO violations are strict liability — intent does not matter.
RLTO Rule 1
Federally Insured Interest-Bearing Account
ALL Chicago landlords (regardless of unit count) must hold security deposits in a federally insured interest-bearing account at a financial institution located in Illinois. The account must be separate from the landlord’s personal funds. You must disclose the institution name and address to the tenant.
RLTO Rule 2
Annual Interest Payment
Interest must be paid to the tenant annually within 30 days after the end of each 12-month rental period (measured from the lease start date). The interest rate is set annually by the Chicago city comptroller. You can pay interest directly or apply it as a credit toward rent.
RLTO Rule 3
Move-In Checklist (Within 3 Days)
The landlord must provide a move-in condition checklist to the tenant within 3 days of move-in. Both parties should sign and date the checklist. Failure to provide the checklist may prevent the landlord from making deductions and constitutes a separate RLTO violation.
RLTO Rule 4
Return Deadlines
- No deductions: Return full deposit within 30 days
- With deductions: Provide itemized statement with paid receipts within 30 days, return remaining balance within 45 days
- Estimated repairs: if repairs are not yet complete, provide good-faith estimate within 30 days and actual receipts within 30 days after completion
LeaseBase tracks your deposit return deadlines and generates compliant itemized statements.
Try Free →Interest Rate Requirements
Statewide (25+ units)
Rate paid by the financial institution on the actual account
Chicago RLTO
Rate set annually by the Chicago city comptroller (currently ~0.01%)
Even though the interest rate is very low (~0.01%), the obligation to pay it is strict. Failing to pay interest on time — even if the amount owed is less than $1 — is a full RLTO violation that exposes you to 2x deposit + attorney fees. Many tenant attorneys specifically look for missed interest payments as a basis for RLTO claims.
Move-In/Move-Out Checklist Requirement
The Chicago RLTO requires landlords to provide a written condition checklist at move-in. This checklist is your primary evidence for deposit deductions at move-out. Without it, you may lose the ability to deduct anything.
Move-In Checklist
- Must be provided within 3 days of move-in
- Document condition of every room: walls, floors, fixtures, appliances
- Both landlord and tenant should sign and date
- Provide a copy to the tenant and keep one for your records
- Take dated photographs to supplement the checklist
Move-Out Checklist
- Conduct a walk-through at move-out using the same checklist format
- Compare against the move-in checklist
- Take dated photographs of any damage
- Use the comparison to justify any deductions
Allowable Deductions
Under both statewide law and the Chicago RLTO, landlords may deduct from the security deposit for:
Unpaid Rent
Any rent owed at the time of move-out. Must match the lease terms.
Damage Beyond Normal Wear and Tear
Repair costs for damage caused by the tenant that exceeds normal, expected deterioration. Must be documented with receipts or estimates. Normal wear and tear (minor scuffs, faded paint, worn carpet from foot traffic) cannot be deducted.
Cleaning
Cleaning costs to restore the unit to the condition at move-in (per the checklist). Cannot deduct for cleaning that exceeds the move-in condition.
Chicago RLTO: Deductions are only valid if you provided the move-in checklist. Without it, a court may rule that you cannot prove the tenant caused the damage, and you forfeit the right to deduct. Always provide the checklist within 3 days of move-in.
Penalties: Statewide vs. Chicago
| Violation | Statewide Penalty | Chicago RLTO Penalty |
|---|---|---|
| Late return (beyond 30/45 days) | 2x deposit | 2x deposit + interest + attorney fees |
| No itemized statement | 2x deposit | 2x deposit + interest + attorney fees |
| Failure to pay interest | Actual damages | 2x deposit + interest + attorney fees |
| No move-in checklist | N/A (not required) | 2x deposit + interest + attorney fees |
| Deposit not in interest-bearing account | Actual damages (25+ units) | 2x deposit + interest + attorney fees |
| No bank disclosure | N/A | 2x deposit + interest + attorney fees |
The Chicago RLTO penalty is the same for every violation. Whether you forgot to pay $0.12 in annual interest or wrongfully withheld a $2,000 deposit, the penalty is 2x the deposit amount + accrued interest + court costs + the tenant’s reasonable attorney fees. On a $2,000 deposit, the total exposure can easily exceed $6,000–$8,000 including attorney fees.
Frequently Asked Questions
Is there a limit on how much security deposit I can charge in Illinois?
No. Illinois has no statutory cap on security deposit amounts, either statewide or under the Chicago RLTO. Most landlords charge 1 to 1.5 months’ rent. Charging significantly more may be challenged as unconscionable, but there is no hard limit written into state law. Regardless of the amount, all deposit rules (interest-bearing account, return deadlines, interest payments) still apply.
What is the current Chicago RLTO interest rate for security deposits?
The interest rate is set annually by the Chicago city comptroller. In recent years, the rate has been approximately 0.01%, meaning the annual interest on a $2,000 deposit would be about $0.20. Despite the negligible amount, the obligation to calculate and pay this interest on time is strictly enforced. Failure to pay by the deadline (within 30 days of each 12-month rental anniversary) triggers the full RLTO penalty.
Can I deduct for normal wear and tear?
No. Normal wear and tear cannot be deducted from the security deposit under either statewide law or the Chicago RLTO. Normal wear and tear includes minor scuffs on walls, faded paint, worn carpet from foot traffic, and loose door handles. Deducting for normal wear and tear is a bad faith deduction and can result in the 2x penalty. The move-in checklist is your best evidence for distinguishing tenant damage from normal wear and tear.
Written by Rachid Abadli
Sacramento-based landlord and founder of LeaseBase
This guide covers Illinois security deposit law under 765 ILCS 710 and 715, the Chicago RLTO security deposit provisions, and related case law. Sources verified against the Illinois General Assembly website and Chicago Municipal Code on August 4, 2026.
Security Deposit Resources
Illinois Landlord-Tenant Laws
Complete overview of statewide statutes, Chicago RLTO, and Cook County RTLO.
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Read the guide →Eviction Notice Templates
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Get templates →Illinois FAQ
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Read the FAQ →All State Laws
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This guide is for informational purposes only and does not constitute legal advice. Security deposit rules vary by municipality, and Chicago imposes additional requirements beyond state law. Consult a qualified Illinois real estate attorney for guidance on your specific situation.