Sourcing USB chargers & power adapters from China

UK duty on USB chargers and power adapters

Heading 8504 covers electrical transformers, static converters and inductors. Most mains USB chargers and AC-DC adapters should be checked against 8504 40 95 90. Accumulator chargers have a separate line, so the word 'charger' alone does not settle classification. The transformer and parts rows cover separate component purchases, rather than alternative codes for complete adapters.

Read from the UK Trade Tariff on 3 December 2026, every supplied line carries 0% duty for goods from China. The supplied data lists no anti-dumping or countervailing duty, suspensions or attached import controls. Import VAT is 20%. These tariff findings do not establish product compliance.

Confirm the commodity code using the input supply, output characteristics, charging function and whether the goods are complete units or components. For related coverage within this heading, see GaN USB-C chargers. The product-compliance discussion below concerns Great Britain.

Specify output profiles, connectors and power sharing

Specify the mains input, plug construction, output voltage and current profiles, charging protocols, connector types and supplied cable. For multi-port chargers, agree the available output at each port when the other ports are occupied. For barrel-connector adapters, specify polarity, plug dimensions and cable length. Approve samples using the intended devices and cables.

Confirm with the relevant authority which Electrical Equipment (Safety) Regulations and electromagnetic compatibility requirements apply to the mains equipment. Obtain the exact-model technical documentation, declaration of conformity, applicable CE or UKCA marking evidence, safety reports and electromagnetic compatibility reports. Request hazardous-substance compliance evidence. Match the reports to the actual circuit, factory and rating.

For external power supplies up to 250 W intended for household and office equipment, confirm the applicable ecodesign efficiency requirements with the relevant authority. For battery chargers without a power supply function, confirm whether an exclusion from those external-power-supply rules applies. Check the product's function before accepting an exclusion. For products in scope, obtain efficiency and no-load consumption results, supported by technical documentation and a declaration of conformity.

Check your status under the waste electrical and electronic equipment rules and arrange annual registration where you are a producer. Use independent testing to investigate missing or mismatched product evidence before approving production.

Worked duty example

Illustrative example, not a quote: Illustrative order: 3,000 USB chargers; FOB and freight values are illustrative. under 8504 40 95 90, invoiced at £12,000 free on board, with £800 of freight and insurance to the UK. The customs value is £12,800. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £12,800, so it is £2,560. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.

Inspection checklist

Identity and labels: match the model, input and output ratings, conformity marking, manufacturer and importer details to the approved documents. Compare the circuit board and critical components with the approved sample.

Output and compatibility: test the claimed charging profiles with the intended devices and cables. Check simultaneous port use, reconnection behaviour, output stability and ripple under load.

Heat and protection: record case temperature during sustained loading. Have a competent testing provider verify insulation and the agreed short-circuit and over-voltage protection behaviour.

Arrival condition: inspect plug pins, case seams, connectors, cable strain relief and signs of moisture or impact. Recheck operation on arrival samples. Use the inspection guide to plan checks before shipment and after delivery.

What goes wrong

An unchanged case can conceal substituted capacitors, transformers or filtering components. Those changes can affect heat, ripple and interference performance while the model label stays the same. Agree a component specification and require factory approval requests before substitutions; compare production samples with the tested design.

A headline output rating can describe a port used alone, leaving less power available when other devices are connected. Cable limitations, unsupported charging protocols or incorrect barrel polarity can also make working stock unsuitable. Put the required device combinations and shared-output behaviour in the purchase specification.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For components and parts, see sourcing for manufacturers.