In Illinois, you have 45 days after the tenant moves out to refund the security deposit in full, and if you want to deduct for damage, an itemized statement with receipts or estimates is due within 30 days (765 ILCS 710/1). If you missed the 45-day mark, the fix is not to wait longer: send the amount you owe plus any itemized statement immediately, date it, and keep proof of mailing. The consequences of a late or missing return are set by the statute itself, so read 765 ILCS 710/1 and, if the amount is significant, talk to an Illinois attorney before you decide how to handle it.
1. Pin down the move-out date on a calendar
Before anything else, write down the date the tenancy ended and the tenant moved out. Then count forward on an actual calendar to find your 45-day date. Example: if a hypothetical tenant moved out on June 3, your 45-day date falls on July 18. If they moved out September 1, the date falls on October 16.
Count every day, not business days, and mark the date in whatever calendar you actually look at. Exactly what event starts the clock — surrender of possession, lease end, key return — is governed by the statute, so read 765 ILCS 710/1 and our Illinois security deposit laws guide rather than guessing from a blog post.
2. Calculate the exact dollar amount you owe today
Pull the lease, the deposit receipt or bank record showing what the tenant actually paid, and any ledger of unpaid rent or charges. Write out a simple arithmetic line:
- Deposit received
- Minus each deduction you intend to claim, listed one by one with a dollar figure
- Equals the refund amount
If you are not confident a deduction will hold up, the practical choice is often to drop it and send more money rather than less. Whether a particular charge is a permitted deduction at all is decided by the statute, not by what your lease says — read 765 ILCS 710/1.
3. Assemble the itemized statement and backup
For any deduction, the Illinois rule calls for an itemized statement of damage with the paid receipts or estimates attached. Put it on one page:
- Tenant name and the address of the unit
- Move-out date
- Deposit amount held
- Each item of damage on its own line with the dollar amount
- The remaining balance being refunded
Attach copies of the invoice, the paid receipt, or the written estimate behind each line. If you have move-in and move-out photos, label them by room and date and include them — security deposit disputes tend to turn on whether you can show the condition at both ends of the tenancy. Rentmark's move-in and move-out inspection checklists store photos against the lease so the before-and-after set is in one place next time.
4. Write the check and mail everything together
Send the refund and the itemized statement in the same envelope, to the tenant's forwarding address if you have one, or to the last address you have on file if you do not. Do not hold the check while you "wait to hear back" — late is late, and every additional day you sit on it is a day you cannot undo.
Use a method that creates a record: certified mail with return receipt, or a mailing service that timestamps the item. If you also have the tenant's email, send a scanned copy there the same day and say in the body that the original and the check went out by mail on that date.
5. Document the date you sent it
Build a small file for this tenancy and keep it for several years. It should hold:
- A copy of the itemized statement exactly as sent
- A copy of the check, or the bank record of the transfer
- The certified mail receipt and tracking printout
- The forwarding address and how you obtained it
- Your move-in and move-out condition records and photos
- A one-line note of what happened and when, written now while you remember it
If the tenant later raises the late return, the question will be what you sent and when. A dated paper trail is the only answer that holds up.
6. Read 765 ILCS 710/1 before you respond to the tenant
Illinois sets out in the statute what follows when a landlord does not meet the requirements. Do not guess at the consequence, and do not repeat what a forum post told you. Read the statute text directly, and if the deposit is large or the tenant has already sent a demand letter, get an Illinois attorney to look at the file before you write back. Our Illinois guide links the statute and sets out the deadlines in one place.
7. If the tenant disputes the deductions
Respond in writing, keep it factual, and attach the same receipts again. A hypothetical example: a tenant moved out June 3, you sent the statement and a partial refund on July 22, and the tenant writes back saying the carpet charge is unfair. Your reply is the move-in photo, the move-out photo, the carpet invoice, and a sentence offering to discuss the figure. If you decide the charge is weak, refunding it quickly is usually cheaper than arguing about it.
Many of these end with a negotiated number rather than a filing. Put any agreement in writing, state that it resolves the deposit, and send the money the day you sign it.
8. Set the system up so the next move-out is on time
Three habits prevent a repeat:
- Record the move-out date the day it happens and immediately write the 45-day date next to it.
- Inspect within a day or two of getting the unit back, with photos, so you have estimates in hand well before any deadline.
- Ask for a forwarding address in writing at the time notice is given, and confirm it at key handover.
It also helps to have the deposit terms written correctly from the start. A state-aware Illinois lease agreement keeps the deposit language and move-out process consistent across your units. Note that Illinois has no statewide cap on the deposit amount, though Chicago has its own ordinance — check your local rules, and use our security deposit limit checker if you own in more than one state.
Frequently asked questions
Can I still send the deposit back after the 45 days have passed?
Yes — send it immediately with the itemized statement and keep proof of the date. What a late return means legally is governed by 765 ILCS 710/1, so read the statute and get advice if the amount is meaningful.
What if I never got a forwarding address?
Send to the last known address and document that you did, along with any attempts to reach the tenant by phone or email. The statute controls what is required here; do not simply keep the money because mail came back.
Does the 45-day rule apply if I only own a couple of units?
Which rentals the Illinois statute covers is set out in 765 ILCS 710/1 itself, and local ordinances such as Chicago's may apply on top of it. Check both for your property.
Are other states' deadlines the same?
No — each state sets its own. If you own elsewhere, see our write-up on missing the deadline in Texas as an example of how different the rules can be.
This is general information, not legal advice. For your specific situation, consult an attorney licensed in Illinois.
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