Import duty / Chapter 31 / Heading 3103
Heading 3103 covers 3 tariff lines in LoadLoom's table; 3 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 |
|---|---|---|---|---|
| 3103.11 | Fertilizers, mineral or chemical; phosphatic, superphosphates, containing by weight 35% or more of diphosphorus pentaoxide (P2O5) | Free | Free | Free with certificate |
| 3103.19 | Fertilizers, mineral or chemical; phosphatic, superphosphates, other than containing by weight 35% or more of diphosphorus pentaoxide (P2O5) | Free | Free | Free with certificate |
| 3103.90 | Fertilizers, mineral or chemical; phosphatic, n.e.c. in heading no. 3103 | 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.
