Harmonized Tariff Schedule of the United States · HTS code · HS 8518.40
8518.40.10: Audio amplifiers: For use as repeaters in line telephony
Audio amplifiers
Not declarable on its own: use one of its 1 subdivisions Data: Harmonized Tariff Schedule of the United States · checked on 24 October 2026
- 8518 Microphones and stands therefor; loudspeakers, whether or not mounted in their enclosures; headphones and earphones, whether or not combined with a microphone, and sets consisting of a microphone and one or more loudspeakers; audio-frequency electric amplifiers; electric sound amplifier sets; parts thereof:
- 8518.40 Audio-frequency electric amplifiers:
- 8518.40.10 For use as repeaters in line telephony
What you pay
Importing into USA
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 1
- Additional dutySection 301 — China — technology transfer, IP and innovation (2018 actions and 2024 four-year review) 25%
- Applies to goods from
- China
- In force
- from 24 September 2018
- Legal act
- HTSUS 9903.88.03
Same subheading in other tariffs
8518.40 Microphones and stands therefor: audio-frequency electric amplifiers
UK Free Third-country duty 2 tariff lines 
EU Free Third-country duty 1 tariff line 
Türkiye 4.5% Third-country duty 1 tariff line 
Canada Free General (MFN) 1 tariff line 
Mexico Free – 15% General (MFN) 5 tariff lines · average 6% 
Brazil 20% General (MFN) 1 tariff line 
Argentina 20% General (MFN) 1 tariff line 
Peru Free General (MFN) 1 tariff line 
New Zealand Free General (MFN) 2 tariff lines 
Japan Free General (MFN) 1 tariff line 
Taiwan Free General (MFN) 2 tariff lines 
GCC Free – 5% General (MFN) 2 tariff lines · average 2.5% 
Switzerland Free General (MFN) 1 tariff line 
Norway Free General (MFN) 1 tariff line 
North Macedonia 8% General (MFN) 1 tariff line 
Nigeria 20% General (MFN) 1 tariff line USA lines: 8518.40
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.
- N358350 U.S. CBP
The tariff classification of four assistive telecommunication devices from China
- N353460 U.S. CBP
The tariff classification of a Pre-Amp PCBA from China
- N321626 U.S. CBP
The tariff classification of audio-frequency electric amplifiers from China
- 600013533 HMRC
This product is an Amplifier Assembly which is used in the High Power Amplifier Unit and used with Sonar Type 2008, an underwater telephone, fitted to submarines. It provides simplex communication between vessels. The item is made from multiple components including, stainless steel housing,…
- 600013412 HMRC
A passenger address amplifier for installation into passenger carrying aircraft comprising electronic components within a housing and a control knob on the front for operation. It is used in aircraft communication systems to amplify audio signals for the public address system. It amplifies audio…
Legal notes
In the Harmonized Tariff Schedule of the United States, 8518.40.10 is one of 2 lines under subheading 8518.40, microphones and stands therefor: audio-frequency electric amplifiers.
The general duty is free, and quantities are declared in p/st.
For the same subheading, the UK duty is free, the EU duty is free, the Türkiye duty is 4.5%, the Canada duty is free, the Mexico duty is 0%–15%, the Brazil duty is 20%, the Argentina duty is 20%, the Peru duty is free, the New Zealand duty is free, the Japan duty is free, the Taiwan duty is free, the GCC duty is 0%–5%, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is 8% and the Nigeria duty is 20%.
The United States imported goods of subheading 8518.40 worth US$1.1bn in 2024; the largest supplier was Mexico.
Questions and answers
What is the USA import duty for HTS code 8518.40.10?
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 8518.40 as a whole, the largest supplier in 2024 was Mexico (US$652m), followed by China.
Typical products
Everyday names, not part of the legal text.