Other — Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines)
Classified under heading 8409 / subheading 8409.91 — chapter 84 of the US Harmonized Tariff Schedule.
General rate applies to goods from countries with normal trade relations. Special rates require a program code (USMCA, GSP, AGOA…). Column 2 applies where normal trade relations do not.
Duty calculator
Estimate the duty owed on an import under HTS 8409.91.50.
Excludes merchandise processing fees, Section 301 duties, antidumping/countervailing duties and freight. Estimates only — not customs advice.
Where this rate sits
Heading 8409 contains 9 tariff lines. The general rate on this line is 2.5%, against an average of 2.5% across the heading (range 2.5%–2.5%).
| Metric | This line | Heading 8409 |
|---|---|---|
| General rate | 2.5% | avg 2.5% |
| Duty-free lines | no | 4 of 9 |
| Specific-rate lines | no | 0 |
Classification path
- 8409Parts suitable for use solely or principally with the engines of heading 8407 or 8408
- 8409.91Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines)
- 8409.91.50Other
All 9 tariff lines under heading 8409
Heading overview →| HTS code | Description | General | Col. 2 |
|---|---|---|---|
| 8409.10.00 | For aircraft engines | Free | 35% |
| 8409.91.10 | Cast-iron parts, not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery | Free | 10% |
| 8409.91.50 | Otherthis page | 2.5% | 35% |
| 8409.91.92 | For marine propulsion engines | 2.5% | 35% |
| 8409.91.99 | Other | 2.5% | 35% |
| 8409.99.10 | Cast-iron parts, not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery | Free | 10% |
| 8409.99.91 | To be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704 | 2.5% | 35% |
| 8409.99.92 | For marine propulsion engines | 2.5% | 35% |
| 8409.99.99 | Other | Free | 35% |
Using HTS 8409.91.50 correctly
A ten-digit HTS number has three parts: the four-digit heading, the six-digit international subheading shared by every WTO member, and the two-digit US statistical suffix. 8409.91.50 is a US national line — the same product may carry a different suffix in the EU TARIC or in another country's tariff.
Classification is determined by the General Rules of Interpretation, not by what the product is called on the invoice. If your goods could fall in two headings, GRI 1 sends you to the heading with the most specific description; GRI 3 breaks ties by essential character. A GRI 3(b) mistake is the single most common reason an entry gets reclassified and billed for unpaid duty plus interest.