Importers of HS 9018.90 (sphygmomanometers, tensimeters and oscillometers; all the fo) from Vietnam actually paid 10% on the taxed portion of the value in 2026-06 — 5.69% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is Free. Over the window the rate on the taxed portion moved null% → 10%, with the largest single step +17.9pp in 2025-04. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is Free — importers actually paid 10%, so the trade-war overlay added 10 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "9018.90", origin: "Vietnam") · see it at trimtabist.com/tariffs
HS 9018.90. The schedule base rate is Free; importers from Vietnam actually paid 10% on the dutiable value in 2026-06 — the trade-war overlay added 10 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved % (2023-07) → 10% (2026-06), largest single step +17.9pp in 2025-04.
Vietnam's lower duty (5.69% vs 12.08%) lets it price up to 6% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Vietnam actually lands cheaper — $13.43/kg vs $15.41/kg (duty in, freight out).
All goods from Vietnam · the whole tariff ledger · 14 CBP rulings cite this code · reproduce: tariff_story(hs: "9018.90", origin: "Vietnam") via /connect. Not customs or legal advice.