What Chapter 99 (9903) subheading applies to HTS 8409.91.9990?

The following Chapter 99 subheadings apply to HTS 8409.91.9990 for Chinese-origin shipments: 9903.88.03. These subheadings must be declared on the entry summary when the applicable trade action is in effect.

HTS CODE

8409.91.9990

Parts suitable for use solely or principally with the engines of heading 8407 or 8408 —…

Q: What is the current import duty rate for HTS 8409.91.9990?

The current effective duty rate for HTS 8409.91.9990 (Parts suitable for use solely or principally with the engines of heading 8407 or 8408 —…) from China (CN) is 27.5%, composed of 2.5% MFN base rate plus trade action overlays: 9903.88.03.

Current Rate BreakdownNo rate change since July 4, 2026

Stacked duty rate composition — CN origin
Component	Rate
MFN BASE RATE	2.5%
SECTION 3019903.88.03	25.0%
TOTAL EFFECTIVE RATE	27.5%

Source:USITC Harmonized Tariff Schedule ↗· as of the daily check on August 19, 2026

Overlays resolved from Chapter 99 U.S. Notes — Chapter 99 trade-action overlays resolved from the U.S. Notes to Chapter 99 (parsed 2026-08-15). The USITC schedule no longer publishes per-code references, so coverage comes from the note lists directly; USTR product exclusions at the statistical-suffix level may still apply — verify before filing.

Where this code sits in the schedule

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)
8409.91.99Other
8409.91.99.90Other

OTHER USITC RATE COLUMNS

Special (FTA/preference): "Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)" — names eligibility for a preferential trade program; not the effective rate for an ordinary shipment.

Column 2 (non-MFN): "35%" — applies to countries not entitled to normal trade relations status; not the effective rate for an ordinary shipment.

Rate History

No rate history recorded yet.

History builds as we detect changes on this code.

ABOUT THIS CODE

HTS 8409.91.9990, filed for CN-origin shipments under "Parts suitable for use solely or principally with the engines of heading 8407 or 8408 —…", sits in Chapter 84 (Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof). The schedule reaches this line starting from heading 8409 — "Parts suitable for use solely or principally with the engines of heading 8407 or 8408", narrowing to 8409.91 ("Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines)"). Level 1 — 8409: "Parts suitable for use solely or principally with the engines of heading 8407 or 8408." Level 2 — 8409.91: "Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines)." Level 3 — 8409.91.99: "Other." Level 4 — 8409.91.99.90: "Other." Filed as: "Parts suitable for use solely or principally with the engines of heading 8407 or 8408 —…." Reading HTS 8409.91.9990's own digits: 8409 names the heading, 91 the subheading, and 9990 the statistical suffix — equivalently, digit positions 1

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