Southampton has a district heating network in the city centre and a mix of port-area housing and suburban developments.
Current Ofgem Price Cap
£1,641/year
April — June 2026 | Typical dual fuel household
Electricity
3,000 kWh
Gas
11,700 kWh
The following energy suppliers offer plans in the SO postcode area:
Comparing energy suppliers in Southampton takes just a few minutes. Enter your postcode and current usage or upload a recent energy bill to see how much you could save by switching to a different tariff.
All major suppliers compete for customers in the SO area, meaning there are often deals available below the Ofgem price cap of £1,641/year. Fixed-rate tariffs can lock in savings and protect against future price rises.
Based on typical consumption in the SO postcode area, the average household uses approximately 3,000 kWh of electricity and 11,700 kWh of gas per year.
At the current Ofgem price cap rate, this works out to around £1,641 per year for a dual fuel household. Your actual bill will depend on your property size, insulation, and heating habits.
The cheapest energy supplier in Southampton (SO) varies by usage and tariff type. Currently, suppliers like British Gas, Octopus Energy, EDF offer competitive rates in the SO postcode area. Use AskUKEnergy to compare the latest plans based on your actual usage.
The average annual energy bill in Southampton is approximately £1,641 based on the current Ofgem price cap. Typical annual usage is around 3,000 kWh of electricity and 11,700 kWh of gas.
Switching energy supplier in Southampton is straightforward. Compare plans using AskUKEnergy, choose a tariff, and your new supplier handles the switch. There is no interruption to your supply. The process typically takes 5 working days under the Ofgem switching guarantee.
Upload your bill to see how much you could save.
Upload Your BillView all energy plans in South East England →
Price cap data: Ofgem. Average usage: DESNZ.
AskUKEnergy is free to use. We may earn a commission if you switch through our links. This never affects the independence of our comparisons. Learn how we make money.