Import duty / Chapter 84 / Heading 8403
Heading 8403 covers 2 tariff lines in LoadLoom's table; 2 of them clear duty-free under USMCA for goods made in Canada, the US or Mexico. Published US and Canadian rates below, verified October 2026. Pick the line that matches your goods for the worked example and border steps.
| HS code | Goods | US duty | Canada duty | USMCA |
|---|---|---|---|---|
| 8403.10 | Boilers; central heating boilers (excluding those of heading no. 8402) | Free | Free | Free with certificate |
| 8403.90 | Boilers; parts of central heating boilers (excluding those of heading no. 8402) | Free | Free | Free with certificate |
This page is a free reference for shippers, not a customs ruling. Final classification and duty are determined by the licensed customs broker at entry, and government amounts are always billed at actual. Rates change with each tariff edition and trade action.
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Chapter 84: Machinery and mechanical appliances, boilers, nuclear reactors; parts thereof · Every chapter
