01
Exact HTS code
Use the full 10-digit classification, not a broad chapter or six-digit heading.
Versioned to 2026HTSRev13 | Reviewed July 31, 2026
Calculate import duty from the facts of the shipment
Start with the exact HTS code, origin, customs value and entry date. The workspace calculator returns the applicable base duty and Chapter 99 layers instead of applying a generic tariff stack.
A calculator is only as accurate as its inputs. Confirm classification and origin before relying on the estimate. End use, trade-program qualification, exclusions, and material content may require supporting documents that a code-and-country lookup cannot prove.
Four inputs, one auditable result
How the current calculation works
02
Country of origin
Use customs origin, which may differ from the seller, shipping port, or routing country.
03
Value and quantity
Enter customs value and the schedule quantity when a statistical unit or specific rate requires it.
04
Entry date
Tariff measures change. The relevant rules are the ones effective when the goods enter.
Returned duty layers
A breakdown you can inspect
The result separates the base duty from each returned Chapter 99 measure. It also shows the provision, rate treatment, dollar amount, and warnings that need human review.
Find an HTS code firstWhat the quote can show
Base duty
The current general rate tied to the selected HTS line.
Section 301
Separate actions resolved as additive, capped, or exempt according to the returned program data.
Section 232
Applicable steel, aluminum, copper, or derivative treatment returned for the entered facts.
Entry fees
Estimated MPF and, for ocean transport, HMF. These are entry-level estimates rather than product tariffs.
Current tariff logic
Why a static rate table is not enough
Section 301 has multiple actions
Original China product lists coexist with newer Brazil and forced-labor actions. The same shipment can require more than one independent scope and exemption test.
Not every rate is additive
Some July 2026 Section 301 treatments are ceilings: the added duty fills a gap up to the applicable MFN-plus-duty cap rather than stacking the headline percentage.
Section 232 requires exact scope
Steel, aluminum, copper, and derivative rules can differ by tariff line, program tier, material facts, and effective date. Use the returned provision, not a general country table.
Need the full landed subtotal?
The workspace TLC adds multi-line entry handling, MPF/HMF estimates, transport mode, and optional shipping, insurance, broker, and other costs.
Frequently asked questions
What information do I need to calculate U.S. import duty?
Use the complete 10-digit HTS code, country of origin, customs value, entry date, and quantity when the tariff line requires a statistical unit or specific-rate calculation. Transport mode is also needed for an HMF estimate.
Does the calculator add every tariff layer together?
No. Each measure is evaluated under its own rules. A Section 301 result may be additive, may fill only the gap to an MFN-plus-duty ceiling, or may be exempt. Section 232 treatment also depends on current product scope and entry facts.
Is Section 301 only a tariff on goods from China?
No. Original China product-list actions remain relevant, but July 2026 added separate actions affecting Brazil and 60 economies in the forced-labor investigations. The result depends on origin, product scope, and applicable exemptions.
What is not included in the estimate?
Unless the result expressly says otherwise, the estimate does not determine antidumping or countervailing duties, quota status, excise taxes, state taxes, port charges, freight, insurance, brokerage, or partner-government-agency requirements.
Official sources
USITC: Current Harmonized Tariff ScheduleUSTR: Section 301 tariff actionsWhite House: April 2026 metals Section 232 proclamationCBP: Harmonized Tariff Schedule information
Reviewed July 31, 2026 against 2026 HTS Revision 13 and the linked official materials. Estimates are informational and are not legal, customs, or brokerage advice.