HTS heading 8408 · Chapter 84
HTS 8408: Compression-ignition internal combustion piston engines
HTS heading 8408 covers compression-ignition internal combustion piston engines (diesel or semi-diesel engines). It has 6 tariff lines with a duty rate; the general (MFN) rates are 2.5% (3 lines), Free (3 lines).
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 |
|---|---|---|---|---|---|
| 8408.10.00 | Marine propulsion engines | 2.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | |
| 8408.10.00.05 | Not exceeding 111.9 kW[No.] | Estimate → | |||
| 8408.10.00.15 | Exceeding 111.9 kW but not exceeding 149.2 kW[No.] | Estimate → | |||
| 8408.10.00.20 | Exceeding 149.2 kW but not exceeding 223.8 kW[No.] | Estimate → | |||
| 8408.10.00.30 | Exceeding 223.8 kW but not exceeding 373 kW[No.] | Estimate → | |||
| 8408.10.00.40 | Exceeding 373 kW but not exceeding 746 kW[No.] | Estimate → | |||
| 8408.10.00.50 | Exceeding 746 kW[No.] | Estimate → | |||
| 8408.20 | Engines of a kind used for the propulsion of vehicles of chapter 87: | ||||
| 8408.20.10 | To be installed in tractors suitable for agricultural use | Free | Free | ||
| 8408.20.10.40 | Not exceeding 37.3 kW[No.] | Estimate → | |||
| 8408.20.10.80 | Exceeding 37.3 kW[No.] | Estimate → | |||
| 8408.20.20.00 | To be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704[No.] | 2.5% | Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | Estimate → |
| 8408.20.90.00 | Other[No.] | 2.5% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | Estimate → |
| 8408.90 | Other engines: | ||||
| 8408.90.10 | To be installed in agricultural or horticultural machinery or equipment | Free | Free | ||
| 8408.90.10.40 | Not exceeding 37.3 kW[No.] | Estimate → | |||
| 8408.90.10.80 | Exceeding 37.3 kW[No.] | Estimate → | |||
| 8408.90.90 | Other | Free | 35% | ||
| 8408.90.90.10 | Not exceeding 149.2 kW[No.] | Estimate → | |||
| 8408.90.90.20 | Exceeding 149.2 kW but not exceeding 373 kW[No.] | Estimate → | |||
| 8408.90.90.30 | Exceeding 373 kW but not exceeding 746 kW[No.] | Estimate → | |||
| 8408.90.90.40 | Exceeding 746 kW but not exceeding 1,119 kW[No.] | Estimate → | |||
| 8408.90.90.50 | Exceeding 1,119 kW[No.] | Estimate → |
21 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 8408.10.00 at the general rate of 2.5%, shipped by ocean, before any Chapter 99 tariffs:
| Base duty (2.5%) | $250.00 |
| Merchandise Processing Fee (0.3464%, min $34.58) | $34.64 |
| Harbor Maintenance Fee (0.125%) | $12.50 |
| Duty and fees | $297.14 |
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
- 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.