By Lisa Fleisher 

LONDON--Should profits derived from a ride in an Uber car in London be taxed in the U.K.? How about clicking on a Google ad, or buying a song on Apple's iTunes?

U.K. treasury chief George Osborne on Wednesday introduced a new 25% tax on foreign companies' profits derived from economic activity in the U.K.-- aiming to rein in what the government says is tax avoidance by multinationals shifting their tax burden to lower-tax regimes.

He singled out tech companies as particular abusers of the system. Though he didn't name names, the British press quickly dubbed the measure the "Google tax."

"Some of the largest companies in the world, including those in the tech sector, use elaborate structures to avoid paying taxes," he said, adding: "That's not fair to other British firms. It's not fair to British people either. Today we're putting a stop to it. My message is consistent and clear: low taxes, but low taxes that will be paid."

Tax advisers and analysts quickly questioned whether the tax could be effectively implemented, saying that it would be difficult to prove that companies were illegally avoiding taxes.

The proposal, which would take effect April 1, comes at a time when the European Union and individual member states have been pressuring large U.S. companies to pay more taxes. The Organization for Economic Cooperation and Development has been reviewing the ways companies shift profits across borders to lower taxes. The EU, meanwhile, is investigating whether several countries gave unfair sweetheart deals to specific companies.

The British government will hold consultations on the new tax later this month, though it isn't clear when any of the key details will be fleshed out. Backed by the Conservative majority, the measures would likely be passed easily by the House of Commons.

The low British tax bills for some U.S. companies have stirred outrage. Facebook Inc., for example, posted U.K. revenue of nearly GBP50 million ($78.5 million) in 2013, but that year had a U.K. corporate tax bill of just over GBP3,000, according to Facebook filings.

The proposed blanket corporate tax on multinationals' profits derived from the U.K. is the biggest swipe to date the country has taken at companies' tax bills. Over the last two years, U.K. lawmaker Margaret Hodge, chair of a parliamentary audit committee, has criticized Google Inc. and Uber Technologies Inc., the car-hailing service, for paying little tax in the country.

Representatives for Google and Facebook didn't return requests for comment. Spokesmen for Apple Inc. and Uber said the companies abide by the tax laws in every country.

The U.K. government estimated the tax would generate GBP1 billion in revenue over five years, but officials didn't explain the methodology for coming up with that figure.

Some tax advisers said they were surprised that the U.K. was taking action ahead of decisions by other international bodies such as the OECD.

"It's just unusual, in my mind, that the U.K. has taken the step of moving ahead of the pack," said Ben Jones, a partner at Eversheds LLP, a law firm. He said it was likely a reasonable calculated risk for a relatively wealthy and flourishing economy.

The key question will be how to determine what constitutes economic activity, advisers said. That could be more difficult for multinational tech companies, which often have representatives in one country selling online services, like ads, that appear in others.

"That is going to be really difficult to define," said Heather Self, a partner at Pinsent Masons LLP. "It sounds to me like it's going to be difficult to apply and very difficult to raise significant sums of money."

Ms. Self said she also worries about backlash from other countries that could see the move as violating treaties. "It's quite an aggressive anti-avoidance measure," she said. "If the U.K. starts doing this sort of thing unilaterally, I think we're inviting retaliation."

Nicholas Winning and Jason Douglas contributed to this article.

Access Investor Kit for Apple, Inc.

Visit http://www.companyspotlight.com/partner?cp_code=P479&isin=US0378331005

Access Investor Kit for Facebook, Inc.

Visit http://www.companyspotlight.com/partner?cp_code=P479&isin=US30303M1027

Access Investor Kit for Google, Inc.

Visit http://www.companyspotlight.com/partner?cp_code=P479&isin=US38259P5089

Access Investor Kit for Google, Inc.

Visit http://www.companyspotlight.com/partner?cp_code=P479&isin=US38259P7069

Alphabet (NASDAQ:GOOG)
Historical Stock Chart
From Mar 2024 to Apr 2024 Click Here for more Alphabet Charts.
Alphabet (NASDAQ:GOOG)
Historical Stock Chart
From Apr 2023 to Apr 2024 Click Here for more Alphabet Charts.