Import duty / Chapter 39 / Heading 3921
Heading 3921 covers 6 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 |
|---|---|---|---|---|
| 3921.11 | Plastics; plates, sheets, film, foil and strip, of polymers of styrene, cellular | 5.3% | Free | Free with certificate |
| 3921.12 | Plastics; plates, sheets, film, foil and strip, of polymers of vinyl chloride, cellular | 4.2% | Free | Not eligible |
| 3921.13 | Plastics; plates, sheets, film, foil and strip, of polyurethanes, cellular | 4.2% | Free | Not eligible |
| 3921.14 | Plastics; plates, sheets, film, foil and strip, of regenerated cellulose, cellular | 6.5% | Free | Free with certificate |
| 3921.19 | Plastics; plates, sheets, film, foil and strip, of plastics n.e.c. in heading no. 3921, cellular | 6.5% | Free | Free with certificate |
| 3921.90 | Plastics; plates, sheets, film, foil and strip, other than cellular | 4.2% | Free | Not eligible |
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.
