8403.10.00.00
Boilers
Central heating boilers (other than those of heading 8402) and parts thereof
Data provenance: Rates from HTS Revision 16 (Aug 15, 2026); trade measures verified against CBP CSMS and Federal Register notices through Aug 15, 2026.
Duty rates
Column 1 (General / MFN)
Free
Column 2 (Non-NTR)
45%
The rates above are statutory column rates. Trade remedies in Chapter 99 (Section 301, 232, IEEPA, reciprocal) and FTA preferences can change the duty owed on a given entry — see below.
Trade measures (Chapter 99)
No active Chapter 99 measures are linked to this code.
Rate-change history
What the rate was before, and when it changed. The government schedule replaces each revision in place; we keep the timeline.
-
RATE_INCREASE USITC HTS Revision 2026.7
Rate increase on 9903.82.03: 0% → 15% (Section 232 combined metals)
See the change → -
SCOPE_EXPANSION Proclamation April 2, 2026 - Combined Metals
Section 232 steel scope expanded: 523 HTS codes added under combined-metals framework
See the change → -
NEW_PROGRAM Proclamation April 2, 2026 - Combined Metals
Combined Section 232 metals framework introduced — 16 new Chapter 99 codes (9903.82.02–17)
See the change → -
NEW_PROGRAM Executive Order Feb 1, 2026 — Reciprocal Tariff (FR 2026-03824)
Section 122 reciprocal surcharge in effect — additional 10% on most imports through July 24, 2026
See the change → -
Base rate HTS 2023
Column 1 general rate set to Free.
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Other codes in heading 8403
Duty by origin country
The rate above is the statutory base. Total landed duty depends on origin — see the calculated rate for 8403.10.00.00 from each major US trading partner.
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