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State law mandates that the Commissioner of the Department of Revenue annually review the interest rate charged on all tax liabilities, making any required changes. Commissioner Thomas B. Miller has established the Tax Interest Rate effective January 1, 2025, to be 8%, which is a decrease from the rate for 2024. Therefore, the taxes payable to the Commonwealth that have not been paid at the time prescribed by statute will accrue interest at the rate of 10% pursuant to KRS 131.183(2)(a)2. Likewise, interest allowed and payable upon any overpayment will accrue interest at the rate of 6% pursuant to KRS 131.183(2)(b)2.​​​​

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