Switching energy suppliers may reduce your costs, but compare the estimated annual cost rather than relying only on the tariff’s unit rates. Check whether your current deal has an exit fee, whether you owe money, and whether your meter type and usage pattern are supported by the new tariff. Take meter readings on the day of the switch and keep confirmation of your final bill. Use an impartial comparison service or check current guidance on GOV.UK, and remember that any savings depend on your usage, tariff and future price changes.