Quarterly IRS Interest Rates Used in Calculating Interest on Overdue Accounts and Refunds of Customs Duties
Quarterly IRS interest rates updated for calculating interest on overdue customs duties and refunds.
Aforeworn detected this change in the International Trade & Tariffs (ITC / CBP / USTR) space on July 29, 2026 and published this briefing so affected operators are forewarned rather than caught off guard. It is rated Low urgency. Importers, customs brokers, and trade compliance officers who have overdue customs duty accounts or are owed refunds. should confirm how it applies to their specific situation before acting. There is a time constraint attached: Effective immediately for the current quarter; apply to all calculations from the start of the quarter.. Acting after that point can mean penalties, a lapsed licence, or lost eligibility — exactly the kind of surprise Aforeworn exists to prevent. Aforeworn monitors International Trade & Tariffs (ITC / CBP / USTR) continuously and turns every detected change into a plain-English briefing like this one, so you always know first. Forewarned is forearmed.
What changed
The IRS quarterly interest rates used to compute interest on underpayments and overpayments of customs duties have been updated for the current quarter.
Who it affects
Importers, customs brokers, and trade compliance officers who have overdue customs duty accounts or are owed refunds.
What you must do
Review current outstanding balances and adjust interest calculations for overdue accounts or refunds using the new rates.
Deadline
Effective immediately for the current quarter; apply to all calculations from the start of the quarter.
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