Importers of HS 6109.90 (of man-made fibers) from Vietnam actually paid 39.81% on the taxed portion of the value in 2026-06 — 39.81% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 32%. Over the window the rate on the taxed portion moved 27.49% → 39.81%, with the largest single step +7.4pp in 2025-05. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 32% — importers actually paid 39.81%, so the trade-war overlay added 7.8 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "6109.90", origin: "Vietnam") · see it at trimtabist.com/tariffs
HS 6109.90. The schedule base rate is 32%; importers from Vietnam actually paid 39.81% on the dutiable value in 2026-06 — the trade-war overlay added 7.8 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 27.49% (2023-07) → 39.81% (2026-06), largest single step +7.4pp in 2025-05.
Vietnam's lower duty (39.81% vs 40.32%) lets it price up to 0.4% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $5.73/kg vs $26.55/kg (duty in, freight out).
All goods from Vietnam · the whole tariff ledger · 16 CBP rulings cite this code · reproduce: tariff_story(hs: "6109.90", origin: "Vietnam") via /connect. Not customs or legal advice.