HTS heading 8421 · Chapter 84
HTS 8421: Centrifuges, including centrifugal dryers
HTS heading 8421 covers centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof. It has 14 tariff lines with a duty rate; the general (MFN) rates are Free (11 lines), 2.5% (2 lines), 1.3% (1 line).
Imports may also owe Chapter 99 tariffs (Section 232, 301 or 201) depending on origin and date, plus the Merchandise Processing Fee and, by sea, the Harbor Maintenance Fee.
Rates from the 2026 HTS Revision 22, effective October 30, 2026. Source: U.S. International Trade Commission.
Tariff lines and duty rates
| HTS code | Description | General | Special | Column 2 | Estimate |
|---|---|---|---|---|---|
| Centrifuges, including centrifugal dryers: | |||||
| 8421.11.00.00 | Cream separators[No.] | Free | 25% | Estimate → | |
| 8421.12.00.00 | Clothes-dryers[No.] | Free | 25% | Estimate → | |
| 8421.19.00.00 | Other[No.] | 1.3% | Free (A,AU,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 25% | Estimate → |
| Filtering or purifying machinery and apparatus for liquids: | |||||
| 8421.21.00.00 | For filtering or purifying water[No.] | Free | 35% | Estimate → | |
| 8421.22.00.00 | For filtering or purifying beverages other than water[No.] | Free | 35% | Estimate → | |
| 8421.23.00.00 | Oil or fuel filters for internal combustion engines[No.] | 2.5% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | Estimate → |
| 8421.29.00 | Other | Free | 35% | ||
| 8421.29.00.05 | Refrigerant recovery and recycling units[No.] | Estimate → | |||
| Other: | |||||
| 8421.29.00.15 | Oil-separation equipment[No.] | Estimate → | |||
| Other: | |||||
| 8421.29.00.40 | Hydraulic fluid power filters, rated at 1,000 kPa or greater[No.] | Estimate → | |||
| 8421.29.00.65 | Other[No.] | Estimate → | |||
| Filtering or purifying machinery and apparatus for gases: | |||||
| 8421.31.00.00 | Intake air filters for internal combustion engines[No.] | 2.5% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | Estimate → |
| 8421.32.00.00 | Catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines[No.] | Free | 35% | Estimate → | |
| 8421.39.01 | Other | Free | 35% | ||
| Dust collection and air purification equipment: | |||||
| 8421.39.01.05 | For machine tools of headings 8456 through 8465, inclusive[kg] | Estimate → | |||
| 8421.39.01.15 | Other[kg] | Estimate → | |||
| Other: | |||||
| Industrial gas cleaning equipment: | |||||
| 8421.39.01.20 | Electrostatic precipitators[No.] | Estimate → | |||
| 8421.39.01.30 | Other[No.] | Estimate → | |||
| 8421.39.01.40 | Gas separation equipment[No.] | Estimate → | |||
| Other: | |||||
| 8421.39.01.60 | Pneumatic fluid power filters, rated at 550 kPa or greater[No.] | Estimate → | |||
| 8421.39.01.90 | Other[kg] | Estimate → | |||
| Parts: | |||||
| 8421.91 | Of centrifuges, including centrifugal dryers: | ||||
| 8421.91.20.00 | Drying chambers for the clothes-dryers of subheading 8421.12 and other parts of clothes-dryers incorporating drying chambers[No.] | Free | 25% | Estimate → | |
| 8421.91.40.00 | Furniture designed to receive the clothes-dryers of subheading 8421.12[No.] | Free | 25% | Estimate → | |
| 8421.91.60.00 | Other[kg] | Free | 25% | Estimate → | |
| 8421.99.01 | Other | Free | 35% | ||
| 8421.99.01.40 | Parts of machinery and apparatus for filtering or purifying water[kg] | Estimate → | |||
| 8421.99.01.80 | Other[kg] | Estimate → |
27 lines shown. Statistical suffixes (the last two digits) inherit the rate of the 8-digit subheading above them.
Example: base duty and fees on $10000
For HTS 8421.19.00.00 at the general rate of 1.3%, shipped by ocean, before any Chapter 99 tariffs:
| Base duty (1.3%) | $130.00 |
| Merchandise Processing Fee (0.3464%, min $34.58) | $34.64 |
| Harbor Maintenance Fee (0.125%) | $12.50 |
| Duty and fees | $177.14 |
Origin-specific tariffs can multiply this. Run this example from China or from Mexico to see every line.
Special program codes in this heading
- A, A*, A+
- Generalized System of Preferences (GSP)
- AU
- U.S.–Australia FTA
- B
- Automotive Products Trade Act
- BH
- U.S.–Bahrain FTA
- C
- Agreement on Trade in Civil Aircraft
- CL
- U.S.–Chile FTA
- CO
- U.S.–Colombia Trade Promotion Agreement
- D
- African Growth and Opportunity Act (AGOA)
- E, E*
- Caribbean Basin Economic Recovery Act
- IL
- U.S.–Israel FTA
- JO
- U.S.–Jordan FTA
- KR
- U.S.–Korea FTA (KORUS)
- MA
- U.S.–Morocco FTA
- OM
- U.S.–Oman FTA
- P, P+
- CAFTA-DR
- PA
- U.S.–Panama Trade Promotion Agreement
- PE
- U.S.–Peru Trade Promotion Agreement
- S, S+
- USMCA (United States–Mexico–Canada Agreement)
- SG
- U.S.–Singapore FTA
A special rate applies only when the goods qualify under that program's rules of origin and the claim is made at entry.
Duty by country of origin
Frequently asked questions
What is the duty rate for HTS 8421?
Heading 8421 has 14 rate lines. The general (MFN) duty rates are Free (11 lines), 2.5% (2 lines), 1.3% (1 line). Products of free trade agreement partners may enter at the special rate, and Column 2 rates apply to countries without normal trade relations. Chapter 99 tariffs can be added on top: calculate the full amount.
Do Section 301, 232 or 201 tariffs apply to HTS 8421?
It depends on the 8- or 10-digit subheading, the country of origin, the entry date and, for Section 232, the metal content. These additional duties are listed in Chapter 99 of the HTS. The free duty calculator checks each program for a given code, origin and date and shows which apply and why.
What fees are added to an import under HTS 8421?
Formal entries pay the Merchandise Processing Fee of 0.3464% of value (minimum $34.58, maximum $670.86 in FY2027). Ocean shipments also pay the Harbor Maintenance Fee of 0.125% of value. See the import duty calculator for how they combine.