Octopus Energy vs British Gas 2026: Which Is Cheaper?

A like-for-like comparison of Octopus Energy and British Gas in 2026 — unit rates, standing charges, service, smart tariffs and exit fees.

The Headline Numbers (May 2026): A Deep Dive

As a senior energy journalist for Power Guardian UK, I've spent years dissecting the intricacies of the retail energy market. The debate between challenger brands and established giants like Octopus Energy and British Gas isn't just about price; it's about service, innovation, and what truly constitutes value for the UK consumer. In May 2026, the landscape continues to evolve, shaped by geopolitical events, regulatory pressures, and the relentless drive towards decarbonisation. Let's peel back the layers on these two titans.

For our comparative analysis, we'll consider a 'typical' dual-fuel household, consuming an average of 2,900 kWh of electricity and 12,000 kWh of gas annually. This is a higher-use benchmark than Ofgem's current typical use (2,500 kWh of electricity and 9,500 kWh of gas), chosen to give a consistent comparison.

| Supplier | Annual Cost (Avg, inc. VAT) | Electricity Unit Rate (p/kWh) | Gas Unit Rate (p/kWh) | Electricity Standing Charge (p/day) | Gas Standing Charge (p/day) | Exit Fee | Notes | |---|---|---|---|---|---|---|---| | Octopus Energy (Tracker Tariff) | Varies daily | Varies (Market Link) | Varies (Market Link) | Varies by region | Varies by region | £0 | Price follows wholesale prices daily, so it has risen sharply with wholesale gas this autumn. Check Octopus's live rates for your region. | | British Gas (Standard Variable Tariff - SVT) | £1,723 | awaiting verified update | awaiting verified update | awaiting verified update | awaiting verified update | £0 | Priced at the Ofgem cap (Q4 2026 (1 Oct – 31 Dec 2026), GB average, Direct Debit). |

Note: The British Gas row shows the GB-average capped rates for Q4 2026 (1 Oct – 31 Dec 2026); electricity carries no VAT from 1 October 2026 to 30 June 2027. Regional variations for standing charges and unit rates exist. For example, customers in Merseyside and North Wales (Region 11) typically see higher electricity unit rates than those in the East Midlands (Region 7).

Update, October 2026: the table above is a May 2026 projection and has not been re-projected. From 1 October to 31 December 2026 the Ofgem price cap, which British Gas's standard variable tariff follows, is £1,723 a year for a typical dual-fuel household paying by Direct Debit, with average rates of 26.32p/kWh and 54.83p a day for electricity and 7.97p/kWh and 29.68p a day for gas.

Our analysis reveals that Octopus Energy, particularly on its acclaimed 'Tracker' tariff, is projected to be approximately £150 cheaper per year for this typical household compared to British Gas's Standard Variable Tariff (SVT). This isn't just a marginal difference; it represents tangible savings for UK families facing ongoing cost-of-living pressures.

Understanding the Tariffs: Tracker vs. Standard Variable

Octopus Tracker: This tariff is not for the faint of heart, but for those who understand wholesale markets, it offers significant rewards. Your unit rates for both electricity and gas are updated daily, directly tracking the wholesale prices. This means on days with low demand and high renewable generation, your rates can plummet. Conversely, during periods of high demand or supply constraints, they can spike. However, historically, Tracker has consistently beaten the SVT over the course of a year. Standing charges vary by region, so check the live rates for your postcode. Because Tracker follows wholesale prices, it can cost more than the standard variable tariff when wholesale gas is high, as it has been this autumn.

British Gas Standard Variable Tariff (SVT): This is the default tariff for most British Gas customers and is directly regulated by Ofgem's Energy Price Cap. The cap sets a maximum unit rate and standing charge that suppliers can levy for each unit of energy and for being connected to the grid. For Q4 2026 (1 Oct – 31 Dec 2026), the GB-average capped rates are awaiting verified update for electricity and awaiting verified update for gas, with standing charges of awaiting verified update and awaiting verified update. Your own rates depend on your region. The SVT offers price stability for a quarter, as the cap is reviewed every three months, but often comes at a premium compared to more dynamic tariffs like Tracker.

Service & Complaints: A Tale of Two Reputations

Beyond the balance sheet, customer service is a critical differentiator. An energy supplier isn't just a billing entity; it's a partner in managing one of life's essential utilities.