U.S. President Donald Trump has vowed to impose a 100% import tariff on any European country that introduces a digital services tax on American technology giants.

Writing on his Truth Social platform, Trump said "numerous European countries" had been discussing bringing in such a levy, and some were close to doing so.

He warned that the punitive penalties would be applied immediately and would completely "supersede" any existing bilateral trade agreements.

While the post targets nations planning the "imminent implementation" of new levies, the precise implications for the UK were not immediately clear, given London has had such a tax in place since 2020.

"Please let this statement serve to represent that any Country that imposes such a Tax will immediately be met with a 100% TARIFF on any and all Goods sent to the United States of America," he wrote.

Britain's 2% Digital Services Tax (DST) applies to major search engines, social media platforms, and online marketplaces with global revenues from their digital businesses exceeding £500 million, and total UK revenues surpassing £25 million.

It impacts some of the largest US companies, including Apple, Google, Meta, and Amazon and raised more than £800 million in 2024–25, up from £678 million in 2023–24, according to the Treasury.

In April, Trump said the UK faced "a big tariff" for purportedly imposing a tax on major US companies.

"They think they're going to make an easy buck, that's why they've all taken advantage of our country", Trump said at the time.

The Department for Business and Trade and the Treasury have been contacted for comment.

Trump's threat of retaliation against European nations that may be planning to launch or revise their own such tax comes just days after the US and EU finalised a new trade deal.

Michael Damianos, minister of energy, commerce and industry of the Republic of Cyprus, said at the time that "the EU can respond swiftly and proportionately when the deal is not respected, or its interests are at stake".

France, Italy and Spain also impose a digital services tax of 3% on large companies operating in their countries, and several other EU nations have implemented or proposed a similar tax, according to the Tax Foundation, a nonprofit group focused on tax policy.

Earlier this year, Amazon raised its fees on sellers, citing such taxes.

Trump has attempted to impose large tariffs on many countries since he became president again in 2025.

In February, the US Supreme Court struck down Trump's earlier attempt to impose a global tariff of 10%.

Nevertheless, the US recently announced new tariffs of 10-12.5% on dozens of countries, accounting for almost all of its imports, citing claims that these countries are not doing enough to tackle forced labour.