Kefalonia’s currency is the Euro, which is used across all the Ionian islands and the Greek mainland. So that’s one less thing to worry about if you’re planning to take a boat trip across to Ithaca or Lefkas!
Of course, it’s always best to buy your Euros before your holiday so you can take advantage of good exchange rates and have cash available as soon as you arrive. And if you have a travel money card then even better! But if you do need more money while you’re away, you’ll find ATM and foreign exchange facilities in Kefalonia’s towns and resorts.