The levy, due to be introduced from next year, will oblige companies such as Facebook, Google and Amazon, to pay a 3% tax on internet transactions, according to a text of the draft budget.

Washington has repeatedly said the levy unfairly targeted U.S. firms. A senior U.S. official said President Donald Trump was ready to threaten retaliation when he met Italian President Sergio Mattarella in Washington last month.

"The current text of the draft budget is confirmed. We are not planning to change it," Misiani said in a conference at the Foreign Press Association in Rome.

(Reporting by Giuseppe Fonte and Gavin Jones, writing by Giselda Vagnoni, editing by Giulia Segreti)