Retrieve applicable import duty rates, VAT, and trade measures for a UK commodity code using the Trade Tariff API's measures data

Steps

1. Call the commodity detail endpoint for your 10-digit commodity code and read data.relationships.import_measures to get the list of measure IDs that apply.
2. Look up each measure ID in the response's 'included' array (type: measure) to get the measure type, duty rate/formula, and any conditions or footnotes.
3. Filter by measure type to isolate the rate you need — for example, measure type 103 represents the third-country (MFN) duty rate, with preferential and quota measure types numbered separately.
4. Cross-reference the geographical area code on each measure against your import's country of origin to select the correct rate (third-country vs. preferential agreement rate).
5. Check for additional measures such as anti-dumping duties, tariff quotas, or import prohibitions/restrictions attached to the same commodity code before finalizing a landed-cost calculation.