http://freepricecompare.com - In reference to the latest report revealed by The Competition and Market Authority (CMA) said around 70% households (customers of Big Six energy companies) are still on expensive standard variable tariff. It is a default tariff applicable once fixed-term contract end. CMA also said, UK households could have been overpaying by £1.7 billion a year. As per the CMA’s analysis, people who are on standard variable tariff can save up to £300 a year on energy bill by grabbing the competitive energy tariff available in the market.