Customs Duty Interest Rates: Same Old 7% Steady as She Goes
Published Date: 9/22/2026
Notice
Summary
Starting October 1, 2026, the IRS interest rates for customs duties stay steady: 7% for late payments by everyone, 7% for refunds to non-corporations, and 6% for refunds to corporations. If you import goods or handle customs duties, these rates affect how much interest you pay or get back. No surprises this quarter, just steady rates to keep your calculations clear and simple!
Analyzed Economic Effects
3 provisions identified: 2 benefits, 1 costs, 0 mixed.
Underpayment Interest Rate Set at 7%
If you import goods and pay customs duties late, the interest rate you owe (underpayments) is 7 percent for both corporations and non‑corporations starting October 1, 2026. This rate is used to calculate additional interest charged on overdue customs accounts through December 31, 2026.
Overpayment Refunds: 7% for Non‑Corporations
If you import goods and are due a customs duty refund as a non‑corporation, Customs will pay interest on that overpayment at 7 percent for refunds beginning October 1, 2026. This interest rate applies to refunds processed during the quarter ending December 31, 2026.
Overpayment Refunds: 6% for Corporations
If a corporation imports goods and is due a customs duty refund, Customs will pay interest on that overpayment at 6 percent for refunds beginning October 1, 2026. This corporate overpayment rate applies for the quarter ending December 31, 2026.
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Key Dates
Department and Agencies
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