Harmonized Tariff Schedule of the United States · HTS code · HS 8403.10

8403.10.00

8403.10.00: Central heating boilers: boilers

Central heating boilers

Not declarable on its own: use one of its 1 subdivisions Data: Harmonized Tariff Schedule of the United States · checked on 24 October 2026

  1. 8403 Central heating boilers (other than those of heading 8402) and parts thereof:
  2. 8403.10.00 Boilers

What you pay

Importing into USA

Customs duty Free standard rate depends on the country of origin
Additional duties and charges 4 additional measures
VAT no federal VAT; a Merchandise Processing Fee of 0.3464 % is charged on formal entries
Duty calculatorCalculate duty and taxes →

US additional duties of HTS chapter 99 in force on 22 October 2026 are included (Section 301, 232, 338 and 201). IEEPA duties are no longer collected after the Supreme Court ruling of February 2026. Conditional exemptions (US content, end use, metal share) are not computed: check the provision.

Additional duties and import rules

Charges on top of the customs duty, and rules the goods must meet at the border.

Additional duties and charges 4

  • Additional dutySection 232 — Steel, aluminium, copper and derivatives 15%
    Applies to goods from
    United Kingdom
    In force
    from 6 April 2026
    Legal act
    HTSUS 9903.82.05
  • Additional dutySection 232 — Steel, aluminium, copper and derivatives 25%
    Applies to goods from
    all countries except United Kingdom, Russia
    In force
    from 6 April 2026
    Legal act
    HTSUS 9903.82.09
  • Additional dutySection 232 — Steel, aluminium, copper and derivatives 25%
    Applies to goods from
    Russia
    In force
    from 6 April 2026
    Legal act
    HTSUS 9903.82.16
  • Additional dutySection 301 — China — technology transfer, IP and innovation (2018 actions and 2024 four-year review) 7.5%
    Applies to goods from
    China
    In force
    from 1 September 2019
    Legal act
    HTSUS 9903.88.15

Same subheading in other tariffs

8403.10 Central heating boilers other than those of heading 8402: boilers

UK 2% Third-country duty 2 tariff lines EU 2.7% Third-country duty 2 tariff lines Türkiye 2.7% Third-country duty 2 tariff lines Canada Free Third-country duty 2 tariff lines Mexico 15% Third-country duty 1 tariff line Brazil 16.2% – 20% Third-country duty 2 tariff lines · average 18.1% Argentina 12.6% – 18% Third-country duty 16 tariff lines · average 15% Peru Free Third-country duty 1 tariff line New Zealand Free – 5% Third-country duty 2 tariff lines · average 2.5% Japan Free Third-country duty 1 tariff line Taiwan 4% Third-country duty 1 tariff line GCC 5% Third-country duty 1 tariff line Switzerland Free Third-country duty 1 tariff line Norway Free Third-country duty 2 tariff lines North Macedonia 15% Third-country duty 4 tariff lines Nigeria 5% Third-country duty 1 tariff line

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.

  • N363583 U.S. CBP 6 August 2026 · 8403.10.00.00

    The tariff classification of hydronic boilers from Canada

  • N285323 U.S. CBP 8 May 2017 · 8403.10.00.00

    The tariff classification of residential boilers from Europe.

  • N285253 U.S. CBP 28 April 2017 · 8403.10.00.00

    The tariff classification of residential boilers.

Legal notes

Chapter notes: Chapter 84 →

HTS code 8403.10.00 is a line of the Harmonized Tariff Schedule of the United States under HS subheading 8403.10 (central heating boilers other than those of heading 8402: boilers).

The general duty is free, and quantities are declared in p/st.

For the same subheading, the UK duty is 2%, the EU duty is 2.7%, the Türkiye duty is 2.7%, the Canada duty is free, the Mexico duty is 15%, the Brazil duty is 16.2%–20%, the Argentina duty is 12.6%–18%, the Peru duty is free, the New Zealand duty is 0%–5%, the Japan duty is free, the Taiwan duty is 4%, the GCC duty is 5%, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is 15% and the Nigeria duty is 5%.

The United States imported goods of subheading 8403.10 worth US$378m in 2024; the largest supplier was Canada, and the United Kingdom ranked 4th with US$16m.

Questions and answers

What is the USA import duty for HTS code 8403.10.00?

The general duty in the Harmonized Tariff Schedule of the United States is free; the supplementary unit is p/st. Preferential rates for goods from agreement countries, anti-dumping duties and VAT are not included.

Where does the United States import these goods from?

For subheading 8403.10 as a whole, the largest supplier in 2024 was Canada (US$132m), followed by South Korea.

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Typical products

Everyday names, not part of the legal text.