The European Commission will miss a target to complete its probe into the tax affairs of Apple and three other multinationals by the middle of the year.
Brussels has accused Ireland of striking a tax arrangement with technology giant Apple that was based on keeping jobs here that gave the company an advantage that amounted to state aid.
The Government here has repeatedly said there is no case to answer.
European Competition Commissioner Margrethe Vestager said her office will miss a self-imposed June deadline to complete probes into Apple's Irish tax affairs, as well as Luxembourg's taxation of Amazon.com and Fiat Finance and the taxes paid by in the Netherlands' by coffee chain Starbucks.
All the companies have said that they acted within the law.
Commissioner Vestager said yesterday she would no longer be able to finalise investigations as soon as planned.
"We will not sacrifice the rule of law or the quality of our work to speed up the process," she told the EU Parliament.