How were Donald Trump’s tariffs calculated?

Written by on April 3, 2025

Ben Chu & Tom Edgington

BBC Verify

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US President Donald Trump has imposed a 10% tariff on goods from most countries being imported into the US, with even higher rates for what he calls the "worst offenders".

But how exactly were these tariffs - essentially taxes on imports - worked out? BBC Verify has been looking at the calculations behind the numbers.

What were the calculations?White House

The formula shared by the White House



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