Free tool

Customs Value Builder (official HMRC rate)

Duty is charged on the customs value, not the invoice. Build it up correctly — including the tooling most importers forget — and convert it at the rate HMRC actually uses.

Invoice currency

CurrencyOfficial rate

What goes in

Price paid for the goodsFreight and insurance to the UK borderPacking costsRoyalties that are a condition of sale

Tooling and other assists

Cost of tooling or materials you suppliedUnits the tooling producedUnits in this shipment

Tooling, moulds and materials you supplied are added to the customs value even when they are invoiced separately and never shipped. We spread the cost across the run, then add the share carried by this shipment.

What comes out

Buying commission (shown separately)Costs after arrival in the UKUK duty and VAT included in the price (DDP invoices)

Only deductible if itemised separately from the price of the goods. If your supplier quoted DDP, the UK duty and VAT are buried in that price — take them out here, or you will pay duty on your duty.

Customs value

Goods and additions: —
Tooling in this shipment: —
Deductions: —
Customs value: —
Customs value in GBP: —

See the official monthly rates on gov.uk · Open the duty calculator

Estimate only. This follows the transaction value method and the common additions and deductions; unusual arrangements, related-party sales and some royalties need specific advice. Confirm against gov.uk before declaring.

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