EU Economic Affairs Commissioner Pierre Moscovici told France's Radio J that his proposals would "create a consensus and an electroshock" on taxing digital economy revenues.
Under EU law, American technology titans like Google and Facebook can choose to report their income in any member state, prompting them to pick low-tax nations like Ireland, the Netherlands or Luxembourg.
That deprives other nations in the bloc of any of the tax revenue, even though they may account for a bigger share of the earnings.
"The idea is to be able to identify the activities of digital companies, so we need a range of indicators -- the number of clicks, the number of IP addresses, advertising, and eventually revenues... and then we'll find ways to tax them," Moscovici said.
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He said the new rules would apply to giants like Google, Apple, Facebook and Amazon -- together known as GAFA -- as well as services like AirBnB and Booking.com.
On average internet giants pay a tax rate of 9 percent in Europe, compared with an average corporate rate of 23 percent, Moscovici said.