Tariff Update

We’ve been answering a number of questions from our members about tariff status. This article is meant to summarize what we know about recent tariff activity, but the administration hasn’t maintained a uniform message about tariffs, so what we know could change at any time.

UPDATE: We have published more up-to-date information for products of Canada, Mexico and other Non-US sources and for steel and aluminum.

China

The United States has applied a 10% tariff in addition to any pre-existing tariffs that already applied to aircraft parts from China.

It is important to recognize that there is an existing list of products of China that were already subject to a 25% ‘additional duty’ provision. This is described under subheading 9903.88.01 and the description can be found under U.S. note 20(b) to sub-chapter III of chapter 99 of the US Harmonized Tariff System. Many aircraft parts are subject to a 25% duty under this provision, including those under (for example) headings 8409, 8411, and 8807. This means that the additional 10% duty of tariff 9903.01.20 brings the import duty on those aircraft parts to 35% (assuming they would have been otherwise subject to a zero-duty entry, but-for the ‘additional duty’ provisions, e.g. aircraft parts under headings 8409, 8411, or 8807).

Because of the peculiar way that the China tariffs had been drafted, it is possible that articles subject to a non-zero base duty may have that base duty doubled (see this article for a detailed explanation). This is a non-issue for most aircraft parts because most are subject to a zero percent base duty rate, but some aircraft parts (like certain fasteners) have a non-zero base duty and the peculiarities will need to be resolved for those imports.

Canada and Mexico

The United States is scheduled to impose 25% tariffs against substantially all products of Canada and substantially all products of Mexico. In each case the tariffs are currently schedule to apply to Canadian imports and Mexican imports as of 12:01 am March 4, 2025. The tariffs (which are the description of how the duty rates will be applied) were withdrawn when the Canada and Mexico tariffs were delayed, so the republished tariffs could change.

Typically, the 25% tariff would be applied to the import value of the goods (25% of the value is charged as a duty). When the goods are exported from the United States for the purpose of obtaining repair abroad, and then subsequently returned to the U.S., the dutiable value upon return is typically calculated based on the parts-and-labor-cost of the MRO work that was accomplished abroad (unless it is a no-charge repair, like a warranty repair, in which case it is based on the fair market value of the repair). This is covered under chapter 98 tariff subheadings like 9802.00.40 (for warranty repairs) or 9802.00.50 (for non-warranty repairs). The goods would be subject to a basic duty based on the repair value times the rate that applies to the underlying good. For example, if the repair cost was $20,000 and the underlying aircraft part was subject to heading 8807, then the old rate of duty would be zero percent so the duty would be zero dollars. Under the new tariffs with the 25% duty rates, though, if the repair cost was $20,000 and the tariff on products of the country in which the repair was performed is at a 25% duty rate, then the U.S. importer to whom the repaired part is returned (from Canada) would need to pay an import duty of $5,000 (in addition to the repair cost).

Steel and Aluminum

The Administration has also issued orders to apply and increase duty rates on steel and aluminum (including plates, sheets, strips, bars, rods, tubes and wires). The new duty rates for aluminum from most countries will be 25% (in addition to any other applicable tariffs). Derivative products made from aluminum or steel will also be subject to a 10% duty (in addition to any other applicable tariffs). The executive order that announced these is quite complicated, with different phase-in dates for different countries, and some higher duty rates for certain countries (for example Turkey will face a 50% duty rate on all steel articles imports and Russia will face a 200% duty rate on imported derivative aluminum articles).

If you think that the steel or aluminum tariffs may apply to your imports then please be sure to read the tariffs thoroughly (don’t just rely on this blog article because there are too many details to republish them all here).

Other Targets

In tomorrow’s Federal Register, we expect to see a new request from the U.S. Trade Representative (USTR). The new request will ask the American people to identify any unfair trade practices by other countries, with a discussion of the harm to the United States. The draft publication refers to these as non-reciprocal trade arrangements so it appears that the Administration (which has threatened to implement reciprocal tariffs) may be looking at such arrangements as justifications for tariffs on comparable products from these source countries. This investigation is a response to the “America First Trade Policy” Executive Order.