Best energy deals for those facing £200 bill shock Cheapest discounted online tariff The cheapest online discounted tariff currently available is first:utility's iSave Dual Fuel v14 tariff. According to Energyhelpline this will cost the average family £1,150 a year - representing a £270 saving over a typical dual fuel bill of £1,420 The catch: Being a smaller supplier, first:utility may not have the same level of customer support that some consumers will be used to with the other larger Big Six companies. This is a variable rate - so if providers raise prices then expect your monthly bills to head upwards again. Cheapest fixed tariff A fixed tariff protects you from any further price rises by locking your rates for a set period of time. The advantage of taking a fixed tariff is you will know exactly how much you will be spending for your future energy needs, regardless of any price rises that may come into effect. Because of this, fixed tariffs are typically more expensive than their discounted variable counterparts. The current cheapest fixed tariff is Ovo Energy's New Energy Fixed. This only fixes energy prices for one year though. A dual fuel customer choosing this tariff could expect to pay £1,172 annually on average, saving £248 off the average bill. Customers on New Energy Fixed see their prices fixed for 12 months from the date of sign-up. The catch:Cancellation fees apply for the New Energy Fixed tariff, with customers charged £30 per fuel if they wish to switch to another supplier before the end of their 12 month fix. Cheapest long-term fixed deal The current cheapest long-term fixed deal is ScottishPower's Fixed Price Energy April 2015 Online tariff. Prices on this tariff are fixed until 31st March 2015, and the average cost of the tariff is £1,261 annually, representing a £159 saving over a typical bill. Long fixes such as this tariff insulate you from any potential price rises for two winters, and with many commentators speculating that more price rises are on the way this may be a good option for those looking to future-proof their energy costs. The catch:There are cancellation penalties for switching away before the end of the fix on this tariff, standing at £25 per fuel. With such a long fix this should be taken into account as you will be tied in until 2015 should you not want to pay the fees for switching to an alternate supplier. Cheapest green energy deal Many households are looking to be socially responsible and do their bit to help the environment, and some may want to choose an energy tariff that sources its energy from renewable sources in order to do this. Good Energy's Good Energy & Gas+ tariff offers electricity that is 100pc from renewable sources. The tariff currently averages at £1,313 a year, offering an £107 saving over a typical bill. Other cheaper green options are available that source less of their fuel from renewable sources, such as Ovo Energy's Green Energy Fixed which sources 15pc of its electricity from renewable sources and costs £1,240 a year on average, a £180 saving over a typical bill and sees prices fixed for 12 months. The catch: Due to the extra costs involved, green tariffs are often more expensive than their traditional counterparts. The Ovo Green Energy Fixed tariff also includes cancellation fees of £30 per fuel if you decide to switch away before the end of the fixed period. Gas is of course not able to be sourced from renewable sources, but green tariffs often include carbon offsets to account for this. General tips The best advice for those looking to cut their domestic energy bills is to regularly compare suppliers and tariffs to ensure you are getting the best possible deal. Using other tariff options such as choosing an internet-only tariff, choosing to pay by monthly direct debit and opting for paperless billing can also help you cut your costs further. Enter your postcode here to check tariffs in your area.