2026 US-China Tariff Stack Calculator — Estimate Your Effective Duty

1 Your shipment

Product / customs value (USD) Use your FOB or customs invoice value — the base the duties are calculated on.

Freight + insurance, if you want landed cost (USD)

Your product's base (MFN) duty rate (%) The normal customs duty before any China-specific actions. Look up your HTS line; many electronics and general goods are 0%, many textiles 5–15%.

2 Which layers apply to your goods?

Section 301 — Lists 1–3 +25%

2018–2019 actions on ~$250B of machinery, electronics, components, auto parts. Confirmed & live.

Section 301 — List 4A / 4B +7.5%

Remaining consumer goods, reduced to 7.5% under Phase One (Feb 2020). Confirmed & live.

2026 forced-labor Section 301 +12.5%

New 301 measure effective 7/24/2026 — 12.5% for China (10% for 17 other economies). Confirmed & live.

New overcapacity tariff (reported) +7.5%?

AP / Seattle Times (Aug 24–25): 7.5% under consideration over cheap-goods flooding. Reported — not yet law. Toggle on to model the scenario.

De minimis exemption suspended

The $800 exemption is suspended — shipments to U.S. consumers are subject to duties again. Included so you know it's not a workaround.

Only check a layer if your product's HTS line is actually in scope. The single biggest cost error in tariff planning is assuming your goods are covered when they aren't — or assuming they aren't when they are.

3 Your effective duty & landed cost

Total effective duty

—

all layers combined

Duty amount (USD)

—

on your product value

Landed cost (USD)

—

value + freight + duty

Layer	Rate	Amount (USD)	Status

Avg. China duty Jul 2026 ≈ 36.5%

your total: —

● average reference (CRS, Aug 18 2026) ● your total — compare to see if you're above or below the current average.

Confirmed vs. reported — read this before quoting anyone. "Current rules" above includes only measures in the official record: Section 301 Lists 1–3 (25%), List 4A/4B (7.5%), and the 2026 forced-labor Section 301 (12.5% for China). The 7.5% overcapacity tariff is reported, not final — modeling it is smart planning, quoting it as law is a mistake. This tool is an estimator, not a customs ruling: your actual duty depends on your specific HTS classification, country of origin, and entry details. Verify against USTR.gov and the Federal Register before making business decisions.

Section 301 Tariff Quick-Check Guide — $14Two-minute workflow to check which action lists & exclusion processes cover your HTS lines. Verify Chinese Suppliers — $14Free-hook companion: the 7 red flags & 30-minute verification sequence before you wire money.

Sources (verified via search 2026-08-27): · CRS — U.S.-China Tariff Actions Since 2018 (avg. ~36.5%, 12.5% forced-labor 301; Aug 18 2026): congress.gov/crs-product/IF12990 · STR Trade — Section 301 rates 7.5%–25%, exclusions extended to Nov 10 2026: strtrade.com · NAM — 301 measure on 60 partners, 10% / 12.5%: nam.org · Wiley — Trump Administration Tariff Tracker: wiley.law · AP / Seattle Times — reported 7.5% overcapacity tariff (Aug 24–25, 2026).