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US Customs / CBPCustoms TariffUSPublished: July 1, 2026

U.S. CBP announces that IRS quarterly interest rates for calculating interest on overdue customs duty accounts and refunds will increase starting July 1, 2026.

[Impact on sellers shipping from Japan to US] Higher interest costs on unpaid duties or pending refund claims. Sellers should settle duties promptly to avoid increased charges. Please verify original.

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Original Text (Excerpt)

This notice advises the public that the quarterly Internal Revenue Service interest rates used to calculate interest on overdue accounts (underpayments) and refunds (overpayments) of customs duties will increase from the previous quarter. For the calendar quarter beginning July 1, 2026, the interest rates used in calculating interest on overdue accounts and refunds of customs duties will increase.
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