Dual fuel discounts don't necessarily give you the cheapest energy bills
It’s one of those things that savvy people do- you buy your gas and electricity from the same supplier to get the dual fuel discount because it would be silly not to, especially when said discount is advertised as being £50, £70 or even £100 per year. That’s a lot of lightbulbs. However, new research from Which!!! suggests that actually, buying your gas and electricity from the same supplier might not be the cheapest way to do it.
While we are all sold by the promise of huge cash discounts, quite often in life it doesn’t pay to get tied products if you don’t have to- home insurance as a condition of your mortgage being a great example- and it seems buying energy might follow a similar pattern. Which!!! found that the best deals for gas and electricity on their own were actually with smaller specialist suppliers, and by choosing the best individual deals, you could actually beat the dual-fuel-discount inclusive price of the more mainstream suppliers.
Which!!! reckon that small suppliers, like Daligas and Zog Energy, are often the cheapest for just gas, while electricity suppliers iSupplyEnergy and GB Energy Supply are the most competitive for electricity single supply. By using the best available tariffs, using prices from enrgylinx, Which!!! calculate your total energy costs for a year would be £849 a year, getting gas from Daligas (Daligas One FIX 12 paperless) and your electricity from GB Energy Supply (Premium Energy Saver). The cheapest dual fuel deal available, after deducting any dual fuel discount, comes in at £870, followed by the next cheapest at £913. This means that buying both fuels from the same supplier is actually costing you at least £20-60 more than choosing the best single fuel tariffs.
Of course, depending on how you are with bills, you might decide that the hassle factor of dealing with two suppliers instead of one is worth £20 to you. Also, if you are a switcher, the additional cashback you might get through sites like Quidco or Topcashback might be more than £20 more valuable to you, meaning a dual fuel switch might actually work out better for you. The point is to always assume the headline discount is not necessarily the best deal until proven otherwise. Energy companies are never considered the most trustworthy of brands, so why believe their discounts are the best without investigating it yourself?