Your guide to the price cap

The energy price cap is set by Ofgem and limits how much suppliers can charge for each unit of gas and electricity on variable and tracker tariffs. It’s designed to keep prices fair and reflect the cost of supplying energy.

The cap is reviewed every three months. When it changes, unit rates and standing charges may go up or down, depending on what’s happening in the energy market. It's important to note:

• The price cap only limits your rates, not your bills.
• Your energy bill still depends on how much energy you use.
• It only applies to variable and tracker tariffs.
• Fixed rate tariffs aren't affected.

If you’re on a variable or tracker tariff, we’ll let you know in plenty of time what’s changing, how it affects your rates, and your options.

From 1 October 2026, Ofgem’s price cap will increase by £60 to £1,723 a year for a typical home on our So Flex standard variable tariff, paying by Direct Debit and using both gas and electricity.

So Green Tracker 12-month tariff: always £50 lower than So Flex (£25 per fuel).

So Green Tracker 24-month tariff: always £100 lower than So flex (£50 per fuel).

Fixed‑rate tariff: not affected.

This change is due to higher wholesale energy costs driven by global events.

For protection against future price rises, you can switch to a fixed‑rate tariff, offering price security for 12, 18 or 24 months – with 100% renewable electricity included as standard. Our best prices are online.

A smart meter sends automatic readings, so your bills are based on what you actually use, with no estimates.

It also helps you understand how much energy you're using, so you can spot where to cut back and keep better control of your bills – especially when prices change.