Many British holidaymakers are still unaware they have to pay the tax at the end of their stay.
Calculated daily, the fee can cost up to €5 (£4.41) per person per day.
The tax is €1 for each star of the hotel you stay in, up to a maximum of five consecutive nights.
If you stay in a three star hotel, you’ll have to pay that hotel €3 per day by the end of your holiday.
A four person group staying in a five star hotel for five nights would therefore have to pay €100 in total at the end.