However, with prices starting to come back down, now could be a good time to switch provider and fix as the cheapest tariffs are not falling in value that dramatically, the money expert stated.
The website said: "Whether a fixed tariff is suitable varies depending on where you live, how much gas and electricity you use, how likely you think a price rise is, and whether you could afford it if there was a big increase.
"As always, I recommend to anyone who hasn't switched for a while to compare tariffs."
Meanwhile, energy-efficiency website UK Energy Saving said waiting for prices to drop further before switching could be a mistake.
Click here to run an energy price comparison, and see if you could be paying less for your gas and electricity.