The Illinois Landlord’s Guide to Security Deposits (Free Receipt + Checklist)

I get calls about security deposits more than almost any other landlord issue. A tenant moves out, the landlord holds the deposit a few weeks too long or forgets to send the itemized statement, and suddenly they are staring down a penalty of twice the deposit plus the tenant’s attorney fees. I have watched landlords lose thousands of dollars over a paperwork deadline they did not even know existed. If you own rental property in Illinois, especially if you are still setting up your rental business, the Security Deposit Return Act is something you need to understand before you collect your first dollar from a tenant.

(This article was last updated April 2026.)

How Much Can You Charge for a Security Deposit in Illinois?

Illinois is one of the few states that does not cap the amount of a security deposit. Legally, you could charge five months’ rent if you wanted to, and unlike disclosure obligations that apply at the point of sale, there is no state statute limiting what you ask for upfront. But just because the law allows it does not mean the market will. Housing is competitive, and tenants will walk if the upfront cost is too steep. In my experience, most tenants are willing to put up anywhere from one to two months’ rent without much pushback. Anything above that and you start losing applicants to the landlord down the street who is asking for less.

Cook County Has a Hard Cap: 1.5x Monthly Rent

If your property is in Cook County, that open-ended flexibility disappears. The maximum security deposit is 150% of the first month’s rent, period. And the county is smart about enforcement. You cannot get around this limit by calling the charge a “cleaning fee,” a “move-in fee,” a “renter’s inspection fee,” or any other creative label. If it functions like a deposit, the county treats it as one.

There is also an installment rule that catches landlords off guard. If your deposit is anywhere between 100% and 150% of monthly rent, the tenant has the right to pay it in six equal installments spread over the first six months of the lease. If you refuse that request or collect more than the 150% cap, the tenant can sue for a penalty of two times the deposit amount, plus attorney fees and court costs.

How to Hold the Security Deposit Properly

Collecting the deposit is the easy part. Holding it correctly under the Security Deposit Return Act is where landlords run into trouble. The statute has specific requirements, and the penalties for getting them wrong are steep enough that tenant attorneys actively look for violations. Here is what you need to do:

• Deposit it into a separate, federally insured, interest-bearing bank account. Do not commingle it with your operating funds.
• Tell your tenant which bank holds the money. If you move it to a different institution, notify the tenant within 14 days.
• Pay the tenant interest every 12 months. The current rate set by the City of Chicago is 0.01% annually (set by the City of Chicago Comptroller).
• Keep itemized receipts for anything you pay from the account.

These are not suggestions. Each one is a statutory requirement, and missing any of them can expose you to double damages. If you are a landlord managing property in Illinois, building a simple compliance checklist for your deposit accounts is one of the best things you can do to protect yourself.

Cook County Has Extra Holding Rules

Chicago landlords have additional requirements on top of the state rules. When you accept a security deposit, you must provide a signed receipt that includes your name, the date the money was received, and a description of the rental unit. Electronic signatures are fine if the tenant pays through electronic funds transfer.

You can accept the first month’s rent and the security deposit in one payment, but you must transfer the deposit portion into a separate federally insured interest-bearing account within five business days. You cannot leave it sitting in your general checking account.

Your lease agreement must name the financial institution where the deposit is held. If you do not have a written lease, you need to provide that information to the tenant in writing within 14 days of receiving the deposit. If you transfer the funds to a different bank, the tenant must be notified within 14 days with the name and address of the new institution. I have personally represented three clients in the last year who were sued over this notification requirement alone. It is an easy rule to overlook, and tenants’ attorneys know it.

How Long Can You Hold the Security Deposit?

Once your tenant moves out, you have 45 days to return the security deposit. That is the hard deadline under the Security Deposit Return Act. If the property became uninhabitable (a fire, for example, or a building code violation that forced the tenant out), the timeline shrinks to just 7 days from the date you receive notice.

Miss the 45-day window and you are not just late. You are liable for penalties. This is the single most common mistake I see landlords make, and it is also the most expensive one. Do not sit on the deposit trying to figure out your repair costs. Get your estimates together early so you can meet the deadline with room to spare.

What Can You Deduct from the Security Deposit?

The basic rule is straightforward: you cannot deduct for ordinary wear and tear. Scuff marks on walls, minor carpet wear from normal use, a few nail holes from hanging pictures. Those are all part of having a tenant live in your property. What you can deduct is damage beyond ordinary wear and tear. A hole punched in a wall, stained or burned carpet, broken appliances, or missing fixtures are all fair game.

But the deductions are only valid if you follow the notice requirements. You must send the tenant an itemized estimate of damages within 30 days of move-out. You can hold the deposit for the full 45-day period, but if you do not provide that itemized statement within 30 days, you lose the right to take any deductions at all. The tenant gets the full deposit back. After that, you have 60 days from move-out to provide the tenant with actual receipts for the repairs.

Chicago Has Its Own Withholding Rules

The Chicago RLTO mirrors the state requirements in most respects, but there is one area where it goes further. If a Chicago landlord sells the property, the buyer (the successor landlord) becomes responsible for any security deposit the original landlord collected. You should always collect that deposit at the closing table and address it during attorney review. The successor landlord must notify the tenant in writing within 14 days of the transfer, and the original landlord stays on the hook until the deposit is actually transferred and proper notice is given.

If a Chicago landlord fails to follow any of these deposit requirements, the tenant can sue for damages equal to two times the deposit plus interest. On a $3,000 deposit, that is $6,000 in penalties before the tenant’s attorney even submits a bill for fees.

The Penalties Are Severe, and Tenant Attorneys Know It

I want to be direct about this, because I have seen too many landlords treat deposit compliance as an afterthought. If you violate the Security Deposit Return Act, here is what a court can order:

• Double damages for wrongfully withholding the deposit
• Full return of the entire deposit amount
• All attorney fees and court costs the tenant incurred to bring the case

That last point is the one that really matters. When a statute awards attorney fees to the winning party, it means every tenant attorney in the city will take the case on contingency. The tenant pays nothing out of pocket. The attorney gets paid from the judgment. And if you own a multi-unit building, the attorney now has a potential client in every unit. I know this because I take these cases myself when I represent tenants. Illinois is a very tenant-friendly state on deposit issues, and the only real protection for a landlord is strict compliance.

If you are facing a deposit dispute or an eviction situation that has gotten complicated, it is worth talking to an attorney before the penalties start stacking up. And if you are wondering what the legal side of an eviction actually costs, I wrote a breakdown of typical eviction attorney fees that might be helpful.

Protect Yourself by Following the Rules

The security deposit rules in Illinois are strict, but they are not complicated once you understand the deadlines. Keep the deposit in a separate interest-bearing account and tell your tenant where it is held. Send the itemized statement within 30 days of move-out, return the balance within 45 days, and provide final receipts within 60 days. If you build those steps into your process from the start, you will avoid the vast majority of deposit disputes. And if a tenant ever tries to claim you mishandled the deposit, you will have the paper trail to prove otherwise.

For landlords dealing with difficult tenants, squatters, or unauthorized occupants, that is a different set of problems with its own legal process. I put together a guide on how to evict squatters in Illinois that covers the steps involved.

Frequently Asked Questions

Can the landlord charge a non-refundable security deposit?

Yes, but only if it is tied to a specific purpose. A non-refundable pet deposit or a clearly labeled cleaning fee can be legitimate. What you cannot do is charge a vague “non-refundable deposit” as a way to collect more money upfront without the obligations that come with a refundable security deposit.

Can the landlord increase the security deposit during the lease term?

No. The deposit amount is locked in for the duration of the lease. If you want to adjust it, you will need to negotiate a new amount when the tenant signs a renewal or a new lease agreement.

Can the tenant use the security deposit to pay the last month’s rent in Chicago?

No, and this comes up constantly. Almost every tenant will ask about applying the deposit toward their final month’s rent. It sounds reasonable on the surface, but if you agree to it, you have no money left to cover damages after the tenant moves out. The deposit exists to protect the landlord, and letting the tenant redirect it to rent defeats the purpose entirely.

Can the tenant dispute the deductions made from the security deposit?

Yes. If a tenant believes the deductions are unreasonable, they can send you a written demand requesting the disputed amount back. If you cannot resolve it informally, the tenant has the right to file a lawsuit. Given that Illinois law awards attorney fees to tenants who win these cases, most tenants’ attorneys are willing to take even small-dollar deposit disputes.

Can the landlord deduct unpaid utilities like water bills or gas?

Yes. If the lease makes the tenant responsible for certain utilities and the tenant leaves those bills unpaid, you can deduct them from the security deposit. Just make sure the lease clearly assigns responsibility for those specific utilities, and include the amounts in your itemized statement of damages.

What about Rhino or security deposit insurance?

Security deposit insurance products like Rhino replace the traditional cash deposit with a small monthly fee the tenant pays. For the tenant, it means less cash needed at move-in. For the landlord, there is still a policy backing the unit in case of damage or unpaid rent. These arrangements are becoming more common, but they come with legal nuance. The fees are considered non-refundable, which means you will need a special waiver addendum in the lease. Have your attorney draft one before you start accepting deposit alternatives.