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VOL. I · WASHINGTON TARIFF DECISION ASSISTANT · April 26, 2026
§ HTS 6903.90.00 · US import duty

Other

HTS 6903.90.00 covers Other, classified under HS chapter 69. The MFN (general column) base duty is Free. 2 active Chapter 99 overlays apply: 9903.88.03 (section301 +25%); 9903.90.08 (other +0%). Imports from China typically incur the Section 301 / IEEPA additional duties listed above; imports from Vietnam, Mexico, India and other origins generally pay only the MFN base unless an origin-specific overlay applies. Antidumping (AD) and countervailing duty (CVD) cases are NOT evaluated on this page — check ADCVD orders separately. Source: USITC HTS release 2026HTSRev6. CBP determines the binding classification and duty at entry.

Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths: · Other
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HTS CODE
6903.90.00
General (MFN)Free
Other (Column 2)30%
§99 overlays2

Base tariff columnsBase tariff columns

Column rates from the USITC HTS export. The column that applies depends on origin and trade-program eligibility.

General (MFN)Free
Special—
Other (Column 2)30%

Official source: USITC Harmonized Tariff Schedule. Duty at entry is determined by US Customs and Border Protection (CBP). AD/CVD and product-specific exclusions are not evaluated by default.

Chapter 99 overlaysChapter 99 overlays

  • 9903.88.03 section301 +25% active
    Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
  • 9903.90.08 other +0% active
    Articles the product of the Russian Federation, as provided for in U.S. note 30(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 30(b) to this subchapter

§ DUTY BREAKDOWNDuty breakdown

Duty ledger below is calculated on a $10,000 customs value. Fees, AD/CVD, and exclusions are not included here.

China (CN)
Total 25% · $2,500.00
Duty breakdown Rate Amount Source
Base dutyBase 0% $0.00 HTS General rate
Chapter 99 section301Chapter 99 25% $2,500.00 9903.88.03
Chapter 99 otherChapter 99 0% $0.00 9903.90.08
Status: exact Methodology: tariff-ledger-v1 Data: d4c9e6f79bac8e84

§ CLASSIFICATION WATCH-OUTSClassification watch-outs

These sibling HTS entries share the same parent but differ in duty rate or Chapter 99 coverage. They are review prompts, not classification recommendations.

  • 6903.10.00.00
    Containing by weight more than 50 percent of free carbon
    Base rate: Free Chapter 99: 1 Chapter 99 coverage differs

§ ORIGIN COMPARISONAlternative origin comparison

This compares tariff-only outcomes for the same HTS across origin countries. Freight, AD/CVD, exclusions, broker fees, and relocation cost are not included.

China → Vietnam
$2,500.00 tariff-only saving
Origin Total rate Duty @ $10,000 Delta vs baseline
China (CN) 25% $2,500.00 —
Vietnam (VN) 0% $0.00 -$2,500.00
Mexico (MX) 0% $0.00 -$2,500.00
India (IN) 0% $0.00 -$2,500.00
South Korea (KR) 0% $0.00 -$2,500.00

Sample duty by originSample duty by origin

Illustrative calculation at USD 10,000 customs value, standard (non-preferential) claim. Chapter 99 additional duties applied where status is active.

Origin Base rate Chapter 99 Total rate Duty (USD)
China (CN) 0% 25% 25% $2,500.00
Vietnam (VN) 0% 0% 0% $0.00
Mexico (MX) 0% 0% 0% $0.00
India (IN) 0% 0% 0% $0.00
South Korea (KR) 0% 0% 0% $0.00

§ RELATED ENTRIESStatistical suffixes under HTS 6903.90.00

All 10-digit statistical reporting suffixes under 6903.90.00.

§ FAQFrequently asked questions

What is the US import duty for HTS 6903.90.00?
HTS 6903.90.00 (Other) has a general (MFN) column rate of Free, plus 2 active Chapter 99 overlay(s) that may apply depending on origin (for example, Section 301 or IEEPA actions). Final duty is determined by CBP at entry.
Which Chapter 99 rules are currently linked to HTS 6903.90.00?
The following rules are attached in our snapshot: 9903.88.03 (section301), 9903.90.08 (other) — section301 / other. Each rule has its own country scope and effective dates — check the rule detail on this page for the additional rate and status before applying it to your shipment.
How do I compare duty from different countries for HTS 6903.90.00?
Use the origin compare view to evaluate this HS code against alternative countries. The calculator applies each country-specific Chapter 99 overlay and the appropriate column rate.
Is this the binding duty determination?
No. This page is a reference built on USITC + Federal Register open data. The binding classification and duty amount is determined by CBP at entry. AD/CVD and product-specific exclusions require separate review.