Import Duty Calculator (USA)
US duty plus MPF and HMF on your entered value — the actual CBP fee math with min/max caps applied.
US duty applies to TRANSACTION VALUE (price paid/payable — international freight excluded, unlike CIF countries). MPF min/max adjust each fiscal year; defaults reflect a recent FY and are editable.
Sources & references
- HTSUS — duty rates; 19 CFR 24.23 (MPF), 24.24 (HMF)
- USTR Section 301 actions — additional duties on China-origin goods
Duty rates, fee amounts and tax structures change with budgets and notifications — figures computed here use the structure described and YOUR entered rates, as a planning estimate. Confirm the live rate for your HS code and any exemptions with your customs broker before relying on the total.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
US import math differs from most of the world in its base: duty applies to the transaction value — the price actually paid or payable for the goods — with international freight and insurance excluded, where CIF countries tax those too. On top of duty ride two ad-valorem fees this calculator applies exactly: the Merchandise Processing Fee at 0.3464% (with a per-entry minimum and maximum that adjust every fiscal year) and, for ocean arrivals only, the Harbor Maintenance Fee at 0.125% with no cap.
About Import Duty Calculator (USA)
The duty rate itself comes from the HTS (Harmonized Tariff Schedule) column 1 general rate for your 10-digit classification — but the headline rate is only the start for China-origin goods, where Section 301 additional duties (7.5%–25% across the lists, plus subsequent actions) stack on top. The additional-duties field models those; enter the combined extra percentage applicable to your line. Antidumping/countervailing orders, where they exist, are a separate (and often enormous) layer worth checking by product and producer. Two structural notes for planning: free-trade-agreement claims (USMCA and others) can zero the column-1 duty but never the MPF/HMF — wait, USMCA-originating goods are actually MPF-exempt, one of its quiet benefits — and de minimis treatment (under $800, Section 321) historically waived duty and MPF entirely for low-value direct shipments, with rules tightening in recent policy. The calculator's strength is the cascade with caps; the inputs deserve a broker's eye on classification day.
How to use Import Duty Calculator (USA)
- 1Set each input — entered value (transaction value), duty rate (hts column 1), additional duties (e.g., section 301), mode — using your own figures.
- 2The estimate recomputes instantly as you type; no submit button, no waiting.
- 3Review the line-item breakdown to see how each component contributes to the total.
- 4Click “Copy quote” to paste the itemised result into an email, quote or audit note.
Why use Import Duty Calculator (USA)?
- ✓Itemised line-by-line breakdown, not just a single opaque total
- ✓Copy-ready output for emails, quotes and audit notes
- ✓Recomputes live as you type — compare scenarios in seconds
- ✓Free and private — nothing you enter leaves your browser
Frequently asked questions
What value does US customs calculate duty on?+
Transaction value: the price paid or payable for the goods when sold for export to the US, plus statutory additions (assists, royalties, packing) — but EXCLUDING international freight and insurance. A $50,000 FOB invoice with $3,000 freight pays duty on $50,000. This FOB-like basis means a US landed-cost model differs structurally from CIF-basis countries like India or the EU.
What are MPF and HMF exactly?+
Merchandise Processing Fee: 0.3464% of entered value on formal entries, with a minimum and maximum per entry (adjusted each fiscal year — the editable fields hold current-era defaults). Harbor Maintenance Fee: 0.125% of value on ocean imports, uncapped, funding port dredging — air and land arrivals don't pay it. Both are fees, not duties, so FTAs mostly don't waive them (USMCA's MPF exemption being the notable exception).
How do Section 301 tariffs affect my total?+
They add a flat additional percentage on China-origin goods by HTS line — 25% on Lists 1–3, 7.5% on List 4A historically, with later actions adding more on targeted categories. A 4.2% column-1 item from China on List 3 pays 29.2% before fees. Exclusions have come and gone by product. The additional-duties field exists precisely for this stack; origin (not export country) determines applicability.
Is there really no duty under $800?+
Section 321 de minimis has allowed duty-and-MPF-free entry for shipments up to $800 per person per day — the mechanism behind duty-free e-commerce parcels. Policy has been tightening (restrictions targeting specific origins and Section-301 goods, and broader reform actions), so treat the threshold as conditional rather than guaranteed: check current CBP guidance for your origin and product before building a business model on it.
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