US Customs / CBPCustoms TariffUSPublished: May 18, 2026
Effective April 1, 2026, the IRS quarterly interest rates used by CBP to calculate interest on overdue customs duty payments and refunds will decrease from the prior quarter.
[Impact on sellers shipping from Japan to US] Minor reduction in refund interest earned on overpayments and slight relief on underpayment penalties. Overall impact is limited. Please verify original.