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HTS 8403Central heating boilers (other than those of heading 8402) and parts thereof

Product or HTS code

Rate lines2

Code	Description	General	Special	Column 2	Units	Calculate
8403.10.00.00	8403.10.00.00BoilersGeneral Free · Column 2 45% · No.	Free		45%	No.
8403.90.00.00	8403.90.00.00PartsGeneral Free · Column 2 45% · kg	Free		45%	kg

2026 HTS Revision 21 (October 9, 2026)

Duty by country of origin

Rate line	South Korea27.75% of imports	Canada23.31% of imports	Germany10.23% of imports	China5.97% of imports	Italy5.61% of imports	Netherlands5.44% of imports	United Kingdom3.83% of imports	Japan3.53% of imports	France3.35% of imports	Switzerland2.33% of imports
8403.10.00.00Boilers	VariesDepends on product facts	VariesDepends on product facts	VariesDepends on product facts	From 7.5%9903.88.15Depends on product facts	VariesDepends on product facts	VariesDepends on product facts	VariesDepends on product facts	VariesDepends on product facts	VariesDepends on product facts	VariesDepends on product facts
8403.90.00.00Parts	12.5%9903.05.71	10%9903.05.29	10%9903.05.39	20%9903.05.319903.88.15	10%9903.05.39	10%9903.05.39	10%9903.05.81	12.5%9903.05.49	10%9903.05.39	12.5%9903.05.74

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).