Duty layers
Caveats
- Material composition and intended use are critical for classification.
- Section 301 and product-specific exclusions can change the result. Verify Chapter 99 and entry-date treatment.
- AD/CVD is not resolved by HTS alone and should be reviewed separately when risk exists.
Importer review notes
Use this scenario to pressure-test a quote, sourcing decision, or upcoming shipment before the entry is prepared. The estimate combines the current base duty with monitored origin overlays, but it does not prove that the supplier, product facts, or entry date qualify for a preferred treatment.
For China origin, review Chapter 99 and Section 301 treatment alongside the base HTS line. For Vietnam and Mexico, confirm origin documentation, transshipment risk, and any preference-program claim before assuming a lower landed cost. Saved alerts are most useful when they are tied to the specific code and country used in purchase orders. Keep a note of the supplier, product bill of materials, declared origin, and planned entry month so a later tariff notice can be reviewed against the same facts. Store those assumptions next to the landed-cost estimate.
Frequently asked questions
What is the estimated import duty for 3924.90.56 from China?
For China-origin goods, 3924.90.56 carries an estimated total duty of about 28.4% — the 3.4% Column 1 General base rate plus a 25% monitored China origin overlay (Section 301 treatment via Chapter 99 heading 9903.88). On a $52,500 customs-plus-freight base that is roughly $14,910 in duty. This is a review estimate, not a filing instruction: preference-program eligibility, product scope, AD/CVD review, and the entry date can change the final landed cost.
Does Section 301 apply to 3924.90.56 from China?
China-origin goods can fall under Section 301 List actions implemented through Chapter 99 (heading 9903.88), which this estimate reflects as a 25% origin overlay on top of the 3.4% base rate. Whether a specific shipment is covered turns on the controlling Chapter 99 list heading, any product-specific exclusion, and the entry date — confirm the code in U.S. note 20 to Subchapter III of Chapter 99 and the controlling USTR / Federal Register notice. USTR opened a second four-year review of the China Section 301 tariffs in 2026, so coverage and rates for a watched code can change.
Why can duty for 3924.90.56 differ by country of origin?
The base HTS duty is the same regardless of origin, but country-of-origin programs add or remove layers. China-origin goods may need a Section 301 Chapter 99 check; Mexico-origin goods may claim USMCA preference with rules-of-origin support; any origin can raise AD/CVD scope questions. Always pair the 3924.90.56 HTS code with the country of origin, supplier facts, and planned entry date rather than treating origin as a simple multiplier.
Is this 3924.90.56 duty estimate the final landed cost?
No. It combines the current Column 1 base rate with monitored origin overlays only. It does not confirm preference-program eligibility, resolve AD/CVD scope, or include merchandise processing and harbor maintenance fees. Verify the controlling HTS description, current Chapter 99 treatment, and the entry date in the official source before filing.
Last verified: Jun 11, 2026. The 3924.90.56 base duty columns behind this China scenario were checked against the official USITC HTS on that date. Origin overlays and program treatment can change between checks — always confirm the controlling description, current Chapter 99 treatment, and entry date in the official source before filing.