RegAlertNews · IDFPR · 30 Jan 2026
Interest Rates Affecting the Security Deposit Interest Act
The Illinois Department of Financial and Professional Regulation, Division of Banking, announced that the interest rate for security deposits, as required by the Security Deposit Interest Act (765 ILCS 715), is 0.005% with an Annual Percentage Yield of 0.01%. This rate, effective as of December 31, 2025, is based on the interest paid by The Northern Trust Company, Chicago, identified as the largest commercial bank in Illinois on minimum deposit savings accounts. Lessors of residential real property with 25 or more units must pay this interest to lessees on security deposits held for six months or more, within 30 days after each 12-month rental period, either in cash or as a rent credit. The Act excludes deposits for public housing and lessees in default.
Mario Treto, Jr., Secretary
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The Illinois Department of Financial and Professional Regulation, Division of Banking announced today that the interest rate paid by the largest commercial bank with its main banking premises in Illinois on minimum deposit savings accounts as of December 31, 2025 was 0.005% with an Annual Percentage Yield (APY) of 0.01%.
The Security Deposit Interest Act (765 ILCS 715) requires that the lessor of residential real property, consisting of 25 or more units, pay interest to the lessee on any security deposit held for six months or more. Interest must be paid to the lessee in cash or in the form of credit towards rent within 30 days after the end of each 12 month rental period at a rate equal to the interest paid by the largest commercial bank in Illinois on minimum deposit passbook savings accounts as of December 31 of the calendar year preceding the inception of the rental agreement. This Act does not apply to deposits made with respect to public housing, nor to a lessee who is in default under the terms of the lease.
For more information, please see the Security Deposit Interest Act .
As of December 31, 2025, The Northern Trust Company, Chicago was the largest commercial bank with its main banking premises in Illinois.
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Source: Illinois Department of Financial and Professional Regulation — original document · Summary generated with machine assistance and reviewed before publication; the authoritative text is the regulator's original document. How RegAlert works
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