HTS 8408.10.00Compression-ignition internal combustion piston engines (diesel or semi-diesel engines):Marine propulsion engines

What that translates to:Diesel marine propulsion engines

Also written 84081000. Rates as CBP is collecting them today. Updated Oct 1, 2026.

Country of origin

Diesel marine propulsion engines (HTS 8408.10.00) from China owe 40% in total duties as of Oct 1, 2026: a 2.5% regular duty plus a 12.5% forced-labor tariff (Section 301) and a 25% China tariff (Section 301).

Total duty rate40%That's $4,000 on a $10,000 shipment.

Forced-labor tariffSection 301, since Jul 24, 202612.5%

China tariffSection 301, since Jul 6, 201825%

Regular dutyBase rate (MFN) in the tariff schedule2.5%

Total duty40%

Court status: Challenged at the U.S. Court of International Trade in In re Section 301 Forced Labor Cases, Court No. 26-03555-3JP, before a three-judge panel. The plaintiffs, Learning Resources and others, have moved for judgment on the agency record, arguing that the action (91 FR 47318) exceeds USTR's statutory authority, is arbitrary and capricious, and is pretextual; 25 states, plaintiffs in Court No. 26-cv-03467-3JP, support them as amici (brief filed Sep 11, 2026). No ruling as of Oct 1, 2026, so the rate is unchanged.

Sources: USITC Harmonized Tariff Schedule, Revision 20 (2026); USTR, Notice of Actions in Section 301 Investigations (forced labor), 91 FR 47318, Jul 28, 2026; HTS 9903.05.31; USTR, Notice of Action and Request for Public Comment Concerning Proposed Determination of Action Pursuant to Section 301 (List 1, 25% from Jul 6, 2018), 83 FR 28710, Jun 20, 2018; HTS 9903.88.01.

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Official description

Compression-ignition internal combustion piston engines (diesel or semi-diesel engines): Marine propulsion engines

Legal text from the Harmonized Tariff Schedule, Revision 20 (2026), chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof.

Statistical lines

The 10-digit numbers used on entry paperwork. They share this code's duty rates.

8408.10.0005 (8408100005)Not exceeding 111.9 kW · reported in No.
8408.10.0015 (8408100015)Exceeding 111.9 kW but not exceeding 149.2 kW · reported in No.
8408.10.0020 (8408100020)Exceeding 149.2 kW but not exceeding 223.8 kW · reported in No.
8408.10.0030 (8408100030)Exceeding 223.8 kW but not exceeding 373 kW · reported in No.
8408.10.0040 (8408100040)Exceeding 373 kW but not exceeding 746 kW · reported in No.
8408.10.0050 (8408100050)Exceeding 746 kW · reported in No.

What changed for this code

Jul 24, 2026Forced-labor tariffs start on imports from 60 economies (Section 301)
Jul 22, 202625% Section 301 tariff on products of Brazil starts
Jan 1, 2026Section 301 tariff on Nicaragua starts at 0%, set to rise to 10% in 2027 and 15% in 2028

Questions about HTS 8408.10.00

What is the duty rate for HTS 8408.10.00?

The regular (column 1 general) rate printed in the tariff schedule is 2.5%. Goods from China owe 40% in total as of Oct 1, 2026, including any additional tariffs. Additional tariffs depend on the country of origin; choose one above to see its full rate.

Is HTS 8408.10.00 subject to Section 301 tariffs?

Yes, for goods from 85 countries and territories as of Oct 1, 2026, including Algeria, Angola, Argentina, Australia, Austria. Choose a country above to see the rate and any exemptions.

Is HTS 8408.10.00 subject to Section 232 tariffs?

No Section 232 tariff applies to HTS 8408.10.00 as of Oct 1, 2026, from any country of origin.

HTSLookup shows the duties CBP collects on this code by country of origin. Antidumping or countervailing duties may also apply to some exporters; they're set per company and aren't shown.