Chance Miller, 9to5Mac:

Last week, Trump announced that the United States would place a 10 percent tariff on another $300 billion worth of goods imported from China, starting September 1st.

And:

Kuo writes that Apple has likely made “proper preparations” for such a tariff, and he predicts that Apple will “absorb most of the additional costs” in the mid-short term. Thus, Kuo believes that “prices of hardware products and shipment forecasts for the U.S. market will remain unchanged” despite the tariff.

Obviously, the cost of any such tariff needs to be paid. If Apple eats the tariff cost, rather than passing it along to consumers, that will impact their bottom line.