Prices in Ireland have risen by more than 8% in the past year, according to European figures, which looked at every country.
8.2% has been the average increase of prices in the year up to May in Ireland, slightly higher than the Eurozone average of 8.1%.
Last month, the annual increase was put at 7.3%.
A big contributing factor to the rise is energy costs, which over the past 12 months have grown by 46.2%, while in the past month it went up by 6.7%.
These totals are estimates with the CSO expected to give a more accurate figure on inflation in Ireland in June.
Estonia saw the highest increase across Europe at a 20% rise in the past year.