We use cookies to allow us and selected partners to improve your experience and our advertising. By continuing to browse you consent to our use of cookies as per our policy which also explains how to change your preferences.

Top five cheapest energy deals for September 2018

Revealed: the firms offering the priciest gas and electricity tariffs

The amount of money you could potentially save on gas and electricity is up since last month. There’s now a £403 difference between the cheapest dual-fuel energy deal and the priciest Big Six variable tariff.

Even if you’re on the cheapest variable tariff with one of the biggest energy companies, you could still save £330 in a year.

While the weather stays relatively warm, your thoughts will be far away from your gas bill. But choose one of these cheaper rates now, and you’ll save over winter.

What’s more, four of the five cheapest deals have no exit fee – so if a better tariff comes along, you’re free to switch to it.

As autumn begins, take a fresh look at your energy tariff to see if you could save money on your bill. We reveal the cheapest tariffs and the pricey ones to avoid. Or compare gas and electricity prices now using Which? Switch to find the best deal for you.

Or you can call us on 0800 410 1149 or 01259 220235.

Cheapest gas and electricity for September

Below, we’ve set out the five cheapest dual-fuel energy tariffs for medium users. Use this as a rough guide to what you would expect to spend each year; the exact cost will depend on how much gas and electricity you use.

All prices are annual. We’ve listed the name of the tariff, and how much it will save a medium user compared with SSE and Scottish Power’s standard variable tariffs (respectively the cheapest and most expensive of the Big Six firms).

This month’s five cheapest tariffs are the same as last month. This is unusual; often we see new companies taking the top spot for cheapest tariff each month.

But it’s not unusual that the lowest-cost gas-and-electricity tariffs are from small companies. Pick any of these five and you should save £331 or more per year, by switching from any standard variable tariff with one of the Big Six energy firms.

Energy tariffs to avoid

Picking a small supplier isn’t a fail-safe way to cut your gas and electricity bills, though. The priciest dual-fuel deal is also from a small supplier. Called Glide, it’s aimed at students and splits utility bills between housemates.

While it might reduce the hassle of chasing your housemates for their share of the bill, it charges more than £100 more than any other supplier for the privilege.

We’ve listed the priciest three dual-fuel tariffs below, so you can avoid them. None have exit fees so, if you’re already signed up, you can leave penalty-free.

These aren’t the only energy deals to steer clear of. Following the recent round of price rises – Scottish Power’s £46 annual rise was the most recent – there are currently 17 energy deals on sale which will cost the average user £1,200 a year or more.

That’s an energy bill of £100 a month, every month. On the cheapest deal you’d pay £71 a month for using the same amount of gas and electricity.

Exactly how much you pay depends on the amount of gas and electricity you use.

Energy companies in the news: are you affected?

In the past month, both British Gas and Scottish Power announced their second price rises of 2018. Four of the Big Six firms have now revealed double price rises. Npower and SSE have not – we’ll let you know if they do.

Also in the news was British Gas for paying out £2.65 million for overcharging customers. It wrongly charged exit fees to some, and overcharged others who wanted to switch supplier. If you were affected, British Gas should have compensated you.

Eon launched a new tariff which promises to charge users the same amount each month for a year. Called Secure Bill, this tariff means that your bills won’t change, no matter how much gas or electricity you use.

Eon will base your monthly payments on how much you used in the last 12 months. If you use more, your payments won’t change. But if you use less, your payments won’t decrease either.

Which? energy pricing research

Prices are based on a dual-fuel tariff available in all regions in England, Scotland and Wales paying by monthly direct debit, with paperless bills. Energy usage is based on Ofgem’s annual average usage figures for low (8,000kWh gas and 1,900kWh electricity), medium (12,000kWh gas and 3,100kWh electricity), and high (17,000kWh gas and 4,600kWh electricity) users. Data is from Energylinx. Prices given are averages across regions, are rounded to the nearest whole pound and correct on 3 September 2018.

Back to top
Back to top