Importers of HS 3926.90 (gaskets, washers and other seals) from Taiwan actually paid 14.89% on the taxed portion of the value in 2026-06 — 14.13% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 3.5%. Over the window the rate on the taxed portion moved 4.97% → 14.89%, with the largest single step -7.4pp in 2026-03. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 3.5% — importers actually paid 14.89%, so the trade-war overlay added 11.4 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "3926.90", origin: "Taiwan") · see it at trimtabist.com/tariffs
HS 3926.90. The schedule base rate is 3.5%; importers from Taiwan actually paid 14.89% on the dutiable value in 2026-06 — the trade-war overlay added 11.4 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 4.97% (2023-07) → 14.89% (2026-06), largest single step -7.4pp in 2026-03.
Taiwan's lower duty (14.13% vs 20.29%) lets it price up to 5.4% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Taiwan actually lands cheaper — $2.21/kg vs $2.21/kg (duty in, freight out).
All goods from Taiwan · the whole tariff ledger · 116 CBP rulings cite this code · reproduce: tariff_story(hs: "3926.90", origin: "Taiwan") via /connect. Not customs or legal advice.