Importers of HS 6403.99 (footwear made on a base or platform of wood) from Vietnam actually paid 18.95% on the taxed portion of the value in 2026-06 — 18.83% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 8%. Over the window the rate on the taxed portion moved 9.25% → 18.95%, with the largest single step -7.5pp in 2026-03. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 8% — importers actually paid 18.95%, so the trade-war overlay added 10.9 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "6403.99", origin: "Vietnam") · see it at trimtabist.com/tariffs
HS 6403.99. The schedule base rate is 8%; importers from Vietnam actually paid 18.95% on the dutiable value in 2026-06 — the trade-war overlay added 10.9 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 9.25% (2023-07) → 18.95% (2026-06), largest single step -7.5pp in 2026-03.
Vietnam's lower duty (18.83% vs 25.71%) lets it price up to 5.8% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $15.34/kg vs $22.39/kg (duty in, freight out).
All goods from Vietnam · the whole tariff ledger · 1 CBP ruling cite this code · reproduce: tariff_story(hs: "6403.99", origin: "Vietnam") via /connect. Not customs or legal advice.