Import duty: the overpayment nobody goes back to check
Every consignment that enters the UK is assigned a commodity code, and that code determines the duty rate. Get it right and you pay what you owe. Get it wrong and you may have been overpaying on every shipment since.
Classification is genuinely difficult. The tariff runs to thousands of codes, the distinctions between them can turn on material composition or intended use, and the person entering the code is frequently a freight forwarder working at speed from a description on a commercial invoice.
Nobody in that chain is incentivised to go back and check. The goods cleared, the duty was paid, and the file closed.
Where an overpayment is identified, HMRC will generally consider a repayment claim made within three years of the date the customs debt was notified. That window covers a lot of shipments for anyone importing regularly.
Classification is not the only route. Preferential origin under a trade agreement may have applied and gone unclaimed. Valuation may have included costs that should have been excluded. Returned goods relief, inward processing and other reliefs may have been available and unused.
The exercise is a review of past entries against the tariff and the paperwork behind them. It is detailed, and it is the kind of work that only pays off if somebody does it thoroughly, which is why it so rarely gets started.
It also has a forward-looking benefit. Correcting a classification stops the overpayment continuing, which is often worth more over time than the historic reclaim.
