Your energy bill will be reduced from 1 April following action taken by the UK Government in the 2025 Budget. You can find more information at gov.uk/your-energy-bill.
In the Autumn Budget, the government announced that some policy costs funded through household energy bills will be reduced from 1 April 2026. A significant proportion of energy bills are made up of ‘non-wholesale costs', including network costs, operating costs and policy costs, all of which support the running of the energy system.
From 1 April, some policy costs will be removed from customer bills, including 75% of the cost of the Renewables Obligation (RO), which will instead be funded by general taxation, and the Energy Company Obligation (ECO) insulation programme, which will come to an end.
These reductions will be applied to your rates automatically, whether you are on a variable or a fixed rate tariff. The exact rates will depend on which tariff you are on.

The price cap sets a limit on the unit rates and standing charges on variable tariffs (such as So Flex and So Flex Green.) It is not a cap on your total energy costs - the more you use, the more you will pay.
Changes in the price cap impact how much energy suppliers charge. If you're on a variable tariff, your standing charge and unit rates will change in line with the price cap. We'll always notify you before any changes. Our So Flex standard variable tariff rates will never exceed the Ofgem price cap.
Fixed tariffs are designed to provide certainty and protect customers from rate rises for up to 24 months. On 1 April 2026, fixed customers will receive a one-off rate reduction, as a result of action taken by the government to reduce some of the policy costs on household energy bills. Your rates will then stay the same for the duration of your tariff.
For new customers joining So Energy on a fixed tariff between 25 February and 31 March, existing rates will apply until 31 March and new, lower rates will apply from 1 April.
For existing customers signing up with So Energy on a new fixed tariff between 25 February and 31 March, existing rates will apply until 31 March and new, lower rates will apply from 1 April.
The Government announced at the Autumn budget it would reduce energy bills by an average of £150 for some households (around £134 for a typical dual-fuel user). These reductions are based on reductions to policy costs including the RO and the ECO scheme from 1 April. Actual savings will vary depending on how much energy you use, where you live and which tariff you’re on.
For So Energy customers on fixed tariffs, the rate reductions from 1 April will vary depending on how policy costs were priced into the original tariff. For most So Energy customers on fixed tariffs, rate reductions from 1 April will include both RO and ECO elements.
If you joined So Energy between 27 November 2025 and 14 January 2026 on a So Hawthorne, So Kings, So Kielder or So Larch tariff, you’ve already benefited from some of the ECO saving in your current prices. From 1 April, your prices will still go down due to the RO reduction and a smaller additional ECO reduction, as part of the ECO saving was already included in your rates. Your rates will then stay the same for the duration of your tariff.
The 6.5p/kWh off‑peak rate stays the same, as it does not include additional policy costs. Peak rates will be reduced to account for reductions in the RO and ECO policy costs.
So Green Tracker is a fixed tariff, with rates updated quarterly in line with the price cap. So Green Tracker rates will be reduced once the 1 April price cap takes effect.
Economy 7 customers on a So Flex tariff will see both day and night rates reduced from 1 April.
So Unique customers will see peak, off-peak and super-off peak rates reduced from 1 April.
Your updated rates from 1 April will be shown in the So Energy app, online account, tariff details and all new bills issued after 1 April.
No. The Warm Home Discount is still a separate scheme that provides a one-off payment to eligible households. These changes only relate to how policy costs are recovered.
As your supplier, So Energy can’t tell you which tariff to choose but we can explain your options. If you prefer flexibility and protection from the price cap, a variable rate tariff may be best for you. If you prefer certainty and protection from future price rises, you may prefer a fixed rate tariff.
If you are a current So Energy customer, you can view your tariff options in My Account. New customers can view our tariffs here.
We regularly check your Direct Debit to make sure you’re paying the right amount for your home, based on your tariff, where you live, and how much energy you use. If your account balance is in debit or credit, we may adjust your payments to help keep everything on track. When it’s time for a review, we’ll be in touch to talk you through your options.