The evolution of the price of natural gas (NG) is examined in industrial and tertiary residential sectors for European Union (EU) countries. The methodological approach is that of comparative analysis. NG price is seen to be positively correlated to prices of liquid fuels. NG price in the tertiary residential sector is significantly higher than that for the industrial sector for all countries examined. An attempt is undertaken to examine tax policies for NG and liquid fuels. All governments of EU countries have the policy of not applying direct taxes to the NG industrial price. They have also taken measures to support its penetration in the residential tertiary sector by applying lower taxes than those on liquid fuels.