Mexican Tariff (TIGIE) · tariff fraction · HS 3903.90

3903.90.05.00

3903.90.05.00: Other styrene polymers, primary: Copolímeros del estireno, excepto los elastoméricos termoplásticos y lo comprendido en las fracciones arancelarias 3903.90.01 a la 3903.90.03.

Other styrene polymers, primary

✓ Can be used in a customs declaration Data: Mexican Tariff (TIGIE), in force from 14 October 2026 · checked on 24 October 2026

This line has no official text in this language; it is shown in the language of its tariff.

  1. 3903 Polímeros de estireno en formas primarias.
  2. 3903.90 Los demás.
  3. 3903.90.05 Copolímeros del estireno, excepto los elastoméricos termoplásticos y lo comprendido en las fracciones arancelarias 3903.90.01 a la 3903.90.03.
  4. 3903.90.05.00 Copolímeros del estireno, excepto los elastoméricos termoplásticos y lo comprendido en las fracciones arancelarias 3903.90.01 a la 3903.90.03.

What you pay

Importing into Mexico

Customs duty 6% standard rate depends on the country of origin

Customs duty only: import VAT, other taxes and trade defence duties of this country are not covered here, and the duty calculator works only with the EU, Türkiye, US and UK tariffs.

Same subheading in other tariffs

3903.90 Polymers of styrene, in primary forms: other

UK Free – 6% Third-country duty 10 tariff lines · average 4.8% EU Free – 6.5% Third-country duty 3 tariff lines · average 2.2% Türkiye Free – 6.5% Third-country duty 3 tariff lines · average 2.2% USA 6.5% General (MFN) 2 tariff lines Canada Free General (MFN) 2 tariff lines Brazil Free – 20% General (MFN) 3 tariff lines · average 10.9% Argentina Free – 12.6% General (MFN) 5 tariff lines · average 10.1% Peru Free General (MFN) 1 tariff line New Zealand Free – 5% General (MFN) 4 tariff lines · average 2.5% Japan 3.1% General (MFN) 2 tariff lines Taiwan 1% – 2.5% General (MFN) 3 tariff lines · average 2% GCC 5% General (MFN) 2 tariff lines Switzerland Free General (MFN) 1 tariff line Norway Free General (MFN) 1 tariff line North Macedonia Free General (MFN) 3 tariff lines Nigeria 5% General (MFN) 1 tariff line

Mexico lines: 3903.90

Binding rulings for similar goods

Decisions of U.S. Customs and Border Protection (CROSS) and HMRC (Advance Tariff Rulings) on goods classified here. A ruling binds only its holder, but shows how the authorities classify similar goods. The descriptions are the authorities’ own, in English.

  • N319986 U.S. CBP 28 June 2021 · 3903.90.50.00

    The tariff classification of a acrylonitrile-butyl acrylate-methyl methacrylate-styrene copolymer (CAS # 25852-38-4) and a styrene acrylonitrile butyl acrylate polymer (CAS # 26299-47-8) from China

  • N278902 U.S. CBP 30 September 2016 · 3903.90.10.00

    The tariff classification of methyl methacrylate-butadeine-styrene copolymers (CAS-25053-09-2) from Korea

  • N278871 U.S. CBP 29 September 2016 · 3903.90.50.00

    The tariff classification of nine copolymers of acrylonitrile-butadiene-styrene (ABS) CAS-9003-56-9 and two copolymer blends of ABS CAS-9003-56-9 and methylstyrene-acrylonitrile-styrene CAS-9010-96-2 from Korea

  • N272473 U.S. CBP 25 February 2016 · 3903.90.50.00

    The tariff classification of Joncryl® 678 from Germany

Legal notes

Subheading notes

1. Within any one heading of this chapter, polymers (including copolymers) and chemically modified polymers are to be classified according to the following provisions:

  1. (a) where there is a subheading named ‘Other’ in the same series:

    1. (1) the designation in a subheading of a polymer by the prefix ‘poly’ (for example, polyethylene and polyamide-6,6) means that the constituent monomer unit or monomer units of the named polymer taken together must contribute 95 % or more by weight of the total polymer content;

    2. (2) the copolymers named in subheadings 390130, 390140, 390320, 390330 and 390430 are to be classified in those subheadings, provided that the comonomer units of the named copolymers contribute 95 % or more by weight of the total polymer content;

    3. (3) chemically modified polymers are to be classified in the subheading named ‘Other’, provided that the chemically modified polymers are not more specifically covered by another subheading;

    4. (4) polymers not meeting (1), (2) or (3) above, are to be classified in the subheading, among the remaining subheadings in the series, covering polymers of that monomer unit which predominates by weight over every other single comonomer unit. For this purpose, constituent monomer units of polymers falling in the same subheading shall be taken together. Only the constituent comonomer units of the polymers in the series of subheadings under consideration are to be compared;

  2. (b) where there is no subheading named ‘Other’ in the same series:

    1. (1) polymers are to be classified in the subheading covering polymers of that monomer unit which predominates by weight over every other single comonomer unit. For this purpose, constituent monomer units of polymers falling in the same subheading shall be taken together. Only the constituent comonomer units of the polymers in the series under consideration are to be compared;

    2. (2) chemically modified polymers are to be classified in the subheading appropriate to the unmodified polymer.

Polymer blends are to be classified in the same subheading as polymers of the same monomer units in the same proportions.

2. For the purposes of subheading 392043, the term ‘plasticisers’ includes secondary plasticisers.

Chapter notes: Chapter 39 →

Tariff fraction 3903.90.05.00 is a line of the Mexican Tariff (TIGIE) under HS subheading 3903.90 (polymers of styrene, in primary forms: other).

The import duty (IGI) is 6%, and quantities are declared in Kg.

For the same subheading, the UK duty is 0%–6%, the EU duty is 0%–6.5%, the Türkiye duty is 0%–6.5%, the US duty is 6.5%, the Canada duty is free, the Brazil duty is 0%–20%, the Argentina duty is 0%–12.6%, the Peru duty is free, the New Zealand duty is 0%–5%, the Japan duty is 3.1%, the Taiwan duty is 1%–2.5%, the GCC duty is 5%, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is free and the Nigeria duty is 5%.

Mexico imported goods of subheading 3903.90 worth US$296m in 2024; the largest supplier was the United States.

Questions and answers

What is the Mexico import duty for tariff fraction 3903.90.05.00?

The import duty (IGI) in the Mexican Tariff (TIGIE) is 6%; the supplementary unit is Kg. This page shows the rate as published by the national source and, where the source publishes them, preferential rates: choose the country of origin to see them. Trade defence duties and VAT are not covered.

Where does Mexico import these goods from?

For subheading 3903.90 as a whole, the largest supplier in 2024 was the United States (US$227m), followed by South Korea.

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