Apple could be handed a bill of more than €1bn (£853m), as the European Commission is set to announce it has ruled against the tech giant's tax dealings in Ireland.
European officials have been concerned Apple has benefited from generous tax policies since 2014 because of its size as an employer in the country. Apple employs more than 5,000 people in Ireland.
Competition commissioner Margrethe Vestager is set to announce the findings tomorrow, but it is expected the EU will recommend a figure north of €1bn for Apple's tax bill in the country, according to Reuters, with the final sum to be calculated by Irish authorities.
A European Commission spokeswoman declined to comment.
Both Apple and Ireland's government have denied any wrongdoing. Apple did not respond to request for comment, although chief executive Tim Cook has previously suggested the iPhone maker would challenge any finding against it.
Speaking to the Washington Post this month, Cook said: “I hope that we get a fair hearing. If we don’t, then we would obviously appeal it.”