"The first port of call for that will be the surplus we still believe we will have," Donohoe told a news conference when asked if he would tap the planned 6 billion euro national reserve fund in the first instance.

"The second port of call will be either our participation in the EU wide energy tax measure that may come in and if that is not forthcoming, the government has committed today to bringing forward our own domestic tax raising measure from the energy sector."

(Reporting by Padraic Halpin; Editing by Chris Reese)