Illinois security deposit law

Security Deposit Laws in Illinois: What Your Landlord Can and Cannot Keep

Your landlord has 45 days under Illinois law to return your security deposit, or you may be owed more than what they withheld. If they keep more than they're legally allowed, you can dispute it.

See what you're owed — free →Start my case
Statutes verified against official sources
USPS Certified Mail with return receipt
Every letter reviewed before it mails

Illinois security deposit return timeline

Deadline to return

45 days

Statute

765 ILCS 710/1 (Security Deposit Return Act) — deadlines at 710/1(a), penalty at 710/1(c)

TWO-STAGE STRUCTURE — no single flat return deadline; read both stages before sending a demand. STAGE 1 (30 days): a lessor may NOT withhold any part as reimbursement for PROPERTY DAMAGE unless, within 30 days of the date the lessee vacated or the date the lessee's right of possession ends (WHICHEVER IS LATER), the lessor furnishes an itemized statement of the damage and the estimated or actual repair/replacement cost, with paid receipts or copies attached. Delivery may be in person, by postmarked mail to the last known address, or by e-mail to a verified e-mail address the lessee provided. If only an estimate was given, actual paid receipts must follow within 30 days of the estimate statement. STAGE 2 (45 days): if no such statement and receipts are furnished, the lessor must return the deposit IN FULL within 45 days of the date the lessee vacated. returnDeadlineDays is 45 because that is the statutory deadline to actually RETURN MONEY — a demand asserting default at day 31 would be PREMATURE. CONDITION: if the lessee fails to provide a mailing or e-mail address, the lessor is not liable for damages or penalties resulting from that failure. SCOPE — the former 'five or more units' threshold was REPEALED effective 1-1-24 (P.A. 103-224); the Act now reaches EVERY residential lessor. Municipal ordinances (notably the Chicago Residential Landlord and Tenant Ordinance and Evanston) impose stricter deadlines, interest and penalties and must be checked for units in those jurisdictions.

What can a landlord legally deduct in Illinois?

Allowed

  • ✓Property damage beyond normal wear and tear, itemized with paid receipts or copies attached (the lessor may include the reasonable cost of its own labor)
  • ✓Cleaning, repair or replacement costs stated as specific dollar amounts in the written lease, for damage beyond normal wear and tear and reasonable to restore the premises to its condition at lease start, referenced in the itemized statement with the applicable lease portion attached

Not allowed

  • ✗Any property-damage withholding where the lessor did not furnish the itemized statement and receipts within the 30-day window
  • ✗Amounts exceeding what is reasonable to restore the premises to the same condition as at the time the lease began, exclusive of normal wear and tear

What if your landlord keeps your deposit wrongfully in Illinois?

Upon a finding by a circuit court that a lessor refused to supply the required itemized statement, OR supplied it in bad faith, AND failed or refused to return the amount due within the statutory time limits, the lessor is liable for TWICE the amount of the security deposit due, together with court costs and reasonable attorney's fees (765 ILCS 710/1(c)). NOTE THE CONJUNCTIVE TEST — a demand letter should establish both the itemization failure (or bad faith) AND the failure to return within the time limits.

How TenantNex helps

  1. 1. Tell us your move-out date, deposit amount, and landlord's address — two minutes.
  2. 2. We generate a demand letter citing 765 ILCS 710/1 (Security Deposit Return Act) — deadlines at 710/1(a), penalty at 710/1(c) and your exact deadline.
  3. 3. We mail it to your landlord via USPS Certified Mail with return receipt.
  4. 4. You track delivery on your case page, with day-7 and day-14 follow-up.

Recover $35 · Dispute $49 — one flat fee, no subscription.

See what your landlord can legally keep →

Illinois tenant rights resources

Every fact on this page is verified against Illinois's official statutory text as of 2026-09-04. TenantNex prepares legal correspondence as a document preparation service, not as your attorney. For complex disputes, consult a licensed attorney in Illinois.

Pay once. We handle the rest.

Both tiers include the letter, the certified mailing, the tracking, and the follow-up. No subscription, no recurring anything — one case, one price.

You pay onceWe prepare & review your letterUSPS Certified to your landlordYou track it to their door
Most tenants choose this

Recover

$35one time — no subscription

We prepare it and mail it for you.

  • Demand letter citing your state statute, deadline, and penalty
  • Mailed to your landlord via USPS Certified Mail with return receipt
  • USPS tracking number on your case page
  • Delivery confirmation the moment your landlord receives it
  • Day-7 and day-14 follow-up with your next steps
Start for $35

Dispute

$49one time — no subscription

We prepare, mail, and respond.

  • Everything in Recover
  • Counter-response letter if your landlord disputes or underpays
  • Attorney referral if unresolved after 21 days
  • Priority review — your letter goes out first
Start for $49
See the full deposit demand letter guide →

What TenantNex is — and isn't

TenantNex is a document preparation and delivery service, not a law firm. We prepare and send correspondence using publicly available state statutes. We do not provide legal advice, legal representation, or guarantee any outcome. For complex legal matters, consult a licensed attorney in your state.