Tariff Calculator — stacked U.S. duties, in seconds
U.S. import costs = MFN base rate + stacked Section 301/232 layers + MPF/HMF fees — every layer is charged on the declared value and simply added, never compounded. China Section 301 lists run 7.5%–25% (plus four-year-review increases); FY2026 MPF is 0.3464% of declared value ($33.58–$651.50 per entry), plus 0.125% HMF for sea freight. Data as of 2026-08-31 (ruleset v0.2.0). Free, in-browser.
Enter a declared value and HTS code to compute the full U.S. import stack for your entry date: MFN base rates, China Section 301, the global 301 program, Section 232, plus MPF/HMF fees. Layers are computed on the declared value and added without compounding — every row traceable to Federal Register or USITC text.
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U.S. full regime: MFN + 301 + 232 + MPF/HMF
FAQ
Do 301, 232 and MFN stack?
Yes. They rest on different legal bases (Trade Act 1974 §301, Trade Expansion Act 1962 §232, USITC MFN). Under CBP practice each layer is computed on the declared value and summed, without compounding. Exceptions: Section 232-covered goods are exempt from the global 301 program; MPF/HMF are fees, not duties.
Do postal parcels pay these too?
Postal shipments ≤$2,500 use informal entry (ET11 fixed fees) with no ad-valorem MPF; above that, or via commercial channels, formal entry applies. De minimis differs by destination — switch the import country to see it.
How is a U.S. import tariff calculated?
For ad-valorem rates, duty = customs (declared) value × the sum of applicable rates: start with the HTS code's MFN base rate, add any Section 301 (China or global program) and Section 232 layers in force on your entry date, then add MPF/HMF fees. Each layer is charged on the declared value and added, never compounded. Specific and compound rates (per unit / per kg) are computed from the official rate text as well.
Who actually pays the tariff — the importer or the exporter?
The importer of record pays U.S. duties to CBP at entry, usually through a customs broker or carrier. Exporters don't remit U.S. tariffs, but the cost is typically built into prices or passed on to buyers — which is why you should know the full duty stack before quoting DDP.
Estimates only. Not customs, tax, or legal advice. Actual duties are determined by U.S. Customs and Border Protection.
Manual rate lookup vs Invoice × Tariff
The last gate before quoting a U.S. buyer — how long does the manual check take you?
| Manual lookup / forwarder | Invoice × Tariff | |
|---|---|---|
| Stacked duties | Paging through the USITC tariff and Federal Register notices layer by layer — hours at a time | Enter the HTS code and get an MFN + 301 + 232 + fees breakdown in seconds |
| Official sources | Hunting for source links yourself — easy to cite the wrong version or date | Every rate row links straight to the Federal Register / USITC source |
| MPF/HMF fees | Often missed, or confused with duty | Fees are separated from duty automatically; MPF charged once per entry |
| Per-unit landed cost | Hand-built Excel formulas — change one number and redo the sheet | Per-unit cost computed automatically, with price back-solved from your target margin |
| Compliant invoice | Copy everything into a template again, or ask the forwarder to issue one | One click from estimate to an invoice PDF with HTS and declaration details |
| Cost | Forwarder / counsel time billed by the hour | Free, no signup, runs in your browser |
Next steps
Duty checked — finish the quote and the paperwork in one go
Carries your estimate over — commercial / proforma invoice as PDF
Batch SKU estimate →Upload Excel/CSV and price the whole sheet — data never leaves your browser
Subscribe to tariff change alerts →Official sources scanned every 12 hours; get an email the moment rates change