Importers of HS 8703.24 (of a cylinder capacity exceeding 3,000 cc) from United Kingdom actually paid 9.96% on the taxed portion of the value in 2026-06 — 9.93% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 2.5%. Over the window the rate on the taxed portion moved 2.5% → 9.96%, with the largest single step +18.4pp in 2025-04. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 2.5% — importers actually paid 9.96%, so the trade-war overlay added 7.5 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8703.24", origin: "United Kingdom") · see it at trimtabist.com/tariffs
HS 8703.24. The schedule base rate is 2.5%; importers from United Kingdom actually paid 9.96% on the dutiable value in 2026-06 — the trade-war overlay added 7.5 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 2.5% (2023-07) → 9.96% (2026-06), largest single step +18.4pp in 2025-04.
United Kingdom's lower duty (9.93% vs 49.62%) lets it price up to 36.1% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $3.46/kg vs $49.41/kg (duty in, freight out).
15 Chapter-99 measures name United Kingdom; scope mapping is partial (several annexes are PDFs) — absence never means exemption. They do not sum, and some are product-specific — the collected rate above is the composed truth.
All goods from United Kingdom · the whole tariff ledger · 3 CBP rulings cite this code · reproduce: tariff_story(hs: "8703.24", origin: "United Kingdom") via /connect. Not customs or legal advice.