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HTS 3903: Polymers of styrene, in primary forms

Polymers of styrene, in primary forms:

Product or HTS code

Rate lines6

Code	Description	General	Special	Column 2	Units	Calculate
	Polystyrene:
3903.11.00.00	Expandable	6.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 46%	kg
3903.19.00.00	Other	6.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 46%	kg
3903.20.00.00	Styrene-acrylonitrile (SAN) copolymers	6.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 45.5%	kg
3903.30.00.00	Acrylonitrile-butadiene-styrene (ABS) copolymers	6.5%	Free (A,AU,BH,CL,D,E,IL,J,JO,KR,MA,OM,P,PE,S,SG)	15.4¢/kg + 47%	kg
3903.90	Other:
3903.90.10.00	Methyl methacrylate-butadiene-styrene (MBS) copolymers	6.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 67.5%	kg
3903.90.50.00	Other	6.5%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 46%	kg

2026 HTS Revision 21 (October 9, 2026)

Duty by country of origin

Rate line	Mexico31.85% of imports	South Korea25.79% of imports	Canada13.28% of imports	Taiwan7.96% of imports	Japan3.8% of imports	Germany2.94% of imports	Netherlands2.6% of imports	China2.33% of imports	Bahamas2.16% of imports	Singapore1.4% of imports
3903.11.00.00Expandable	16.5%9903.05.55	12.5%9903.05.71	16.5%9903.05.29	10%9903.05.76	12.5%9903.05.49	10%9903.05.39	10%9903.05.39	44%9903.05.319903.88.02	19%9903.05.24	19%9903.05.68
3903.19.00.00Other	16.5%9903.05.55	12.5%9903.05.71	16.5%9903.05.29	10%9903.05.76	12.5%9903.05.49	10%9903.05.39	10%9903.05.39	44%9903.05.319903.88.02	19%9903.05.24	19%9903.05.68
3903.20.00.00Styrene-acrylonitrile (SAN) copolymers	16.5%9903.05.55	12.5%9903.05.71	16.5%9903.05.29	10%9903.05.76	12.5%9903.05.49	10%9903.05.39	10%9903.05.39	44%9903.05.319903.88.02	19%9903.05.24	19%9903.05.68
3903.30.00.00Acrylonitrile-butadiene-styrene (ABS) copolymers	16.5%9903.05.55	12.5%9903.05.71	16.5%9903.05.29	10%9903.05.76	12.5%9903.05.49	10%9903.05.39	10%9903.05.39	44%9903.05.319903.88.02	19%9903.05.24	19%9903.05.68
3903.90.10.00Methyl methacrylate-butadiene-styrene (MBS) copolymers	16.5%9903.05.55	12.5%9903.05.71	16.5%9903.05.29	10%9903.05.76	12.5%9903.05.49	10%9903.05.39	10%9903.05.39	44%9903.05.319903.88.02	19%9903.05.24	19%9903.05.68
3903.90.50.00Other	16.5%9903.05.55	12.5%9903.05.71	16.5%9903.05.29	10%9903.05.76	12.5%9903.05.49	10%9903.05.39	10%9903.05.39	44%9903.05.319903.88.02	19%9903.05.24	19%9903.05.68

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).