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HTS 8404Auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economizers, super-heaters, soot removers, gas recoverers); condensers for steam or other vapor power units; parts thereof

Product or HTS code

Rate lines4

Code	Description	General	Special	Column 2	Units	Calculate
8404.10.00	8404.10.00Auxiliary plant for use with boilers of heading 8402 or 8403General 3.5% · Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 45%	3.5%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	45%
8404.10.00.10	8404.10.00.10EconomizersGeneral 3.5% · Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 45% · t	3.5%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	45%	t
8404.10.00.50	8404.10.00.50OtherGeneral 3.5% · Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 45% · t	3.5%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	45%	t
8404.20.00.00	8404.20.00.00Condensers for steam or other vapor power unitsGeneral 5% · Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 45% · t	5%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	45%	t
8404.90.00.00	8404.90.00.00PartsGeneral 3.5% · Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 45% · kg	3.5%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	45%	kg

2026 HTS Revision 21 (October 9, 2026)

Duty by country of origin

Rate line	Canada39.82% of imports	Israel17.41% of imports	Germany10.24% of imports	Mexico8.35% of imports	Thailand4.35% of imports	China4.33% of imports	South Korea3.9% of imports	India2.27% of imports	United Kingdom1.74% of imports	Brazil1.27% of imports
8404.10.00.10Economizers	13.5%9903.05.29	16%9903.05.47	10%9903.05.39	13.5%9903.05.55	16%9903.05.77	41%9903.05.319903.88.03	12.5%9903.05.71	13.5%9903.05.44	13.5%9903.05.81	41%9903.05.019903.05.27
8404.10.00.50Other	13.5%9903.05.29	16%9903.05.47	10%9903.05.39	13.5%9903.05.55	16%9903.05.77	41%9903.05.319903.88.03	12.5%9903.05.71	13.5%9903.05.44	13.5%9903.05.81	41%9903.05.019903.05.27
8404.20.00.00Condensers for steam or other vapor power units	15%9903.05.29	17.5%9903.05.47	10%9903.05.39	15%9903.05.55	17.5%9903.05.77	42.5%9903.05.319903.88.01	12.5%9903.05.71	15%9903.05.44	15%9903.05.81	42.5%9903.05.019903.05.27
8404.90.00.00Parts	13.5%9903.05.29	16%9903.05.47	10%9903.05.39	13.5%9903.05.55	16%9903.05.77	41%9903.05.319903.88.01	12.5%9903.05.71	13.5%9903.05.44	13.5%9903.05.81	41%9903.05.019903.05.27

Total duty on a $10,000 ocean shipment entered 2026-10-13, before customs fees. Origins are the leading sources of US imports under this heading in 2025 (US Census Bureau).