Illinois security deposit law

Read from the statute itself on 2026-11-09. Statewide rule; a city or county can add its own.

Maximum deposit: No statutory cap
Return deadline: 45 days
Interest: See the statute

No statewide cap; since 2024 the return rules cover every residential landlord: deadlines of 30 days, or 45 days for a full return, after move-out. Interest is owed only by landlords with 25+ units in one building or contiguous buildings, on deposits held over 6 months. Chicago and Evanston have stricter rules.

Source: 765 ILCS 710/1 (Security Deposit Return Act); 765 ILCS 715/1 (Security Deposit Interest Act) · read on 2026-11-09

Calculate it for your rent

State

Monthly rent ($)

No statutory cap

Illinois's statute sets no maximum: the amount is whatever the lease says. We show no « maximum » we would have to invent.

Return deadline

45 days

To deduct, the landlord gives an itemized statement of damage within 30 days after the tenant moves out, with paid receipts within 30 more days. Otherwise the full deposit is due within 45 days.

Interest required

See the statute

Illinois: No statewide cap; since 2024 the return rules cover every residential landlord: deadlines of 30 days, or 45 days for a full return, after move-out. Interest is owed only by landlords with 25+ units in one building or contiguous buildings, on deposits held over 6 months. Chicago and Evanston have stricter rules.

Source: 765 ILCS 710/1 (Security Deposit Return Act); 765 ILCS 715/1 (Security Deposit Interest Act) · read on 2026-11-09

Illinois: common questions

How much can a landlord charge for a security deposit in Illinois?

Illinois's statute sets no maximum. No statewide cap; since 2024 the return rules cover every residential landlord: deadlines of 30 days, or 45 days for a full return, after move-out. Interest is owed only by landlords with 25+ units in one building or contiguous buildings, on deposits held over 6 months. Chicago and Evanston have stricter rules.

How long does a landlord have to return a security deposit in Illinois?

45 days. To deduct, the landlord gives an itemized statement of damage within 30 days after the tenant moves out, with paid receipts within 30 more days. Otherwise the full deposit is due within 45 days.

Not legal advice. Confirm with a local landlord-tenant attorney before relying on a figure.

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<p style="font-size:13px;margin:4px 0 0">Free <a href="https://www.proprietio.com/tools/security-deposit-calculator">security deposit calculator by state</a> by Proprietio.</p>