British Gas vs Octopus Energy Summer 2026: Bills Compared

LAST REVIEWED 2026-09-06

What is the headline comparison between British Gas and Octopus Energy after the new cap?

For summer 2026, the headline comparison centres on tariff transparency and pricing. The typical dual fuel bill under the October to December 2026 price cap is £1,723, up 4% from the July to September 2026 cap of £1,663. British Gas does not publish its standard variable tariff, while Octopus Energy publishes Flexible Octopus.

Both suppliers are major players, but their approaches differ. British Gas, owned by Centrica, has a large customer base and offers various tariffs, but its SVT rates are not publicly listed. Octopus Energy, an independent challenger, is known for innovative tariffs and transparent pricing. The price cap applies to both, but actual bills depend on usage and tariff choice.

For a typical household using 2,500 kWh electricity and 9,500 kWh gas per year, the cap sets a maximum for SVT customers. However, fixed deals may be higher or lower. British Gas often offers fixed tariffs, but their rates are not always published. Octopus offers fixed deals as well, but the Flexible Octopus is a benchmark.

When comparing, check the specific tariff details, including standing charges and unit rates, as these vary by region and payment method. The price cap is a reference point, not a guarantee of the lowest bill.

How do the standard variable tariffs compare between British Gas and Octopus Energy?

British Gas does not publish its standard variable tariff, whereas Octopus Energy publishes Flexible Octopus. This means that for British Gas, the exact rates are not publicly available, but they are capped by Ofgem's price cap. Octopus's Flexible Octopus is a standard variable tariff that is also capped.

The price cap for October to December 2026 is £1,723 for typical dual fuel, a 4% increase from the previous period. This cap applies to both suppliers' SVTs. However, the actual rates may differ due to regional variations and standing charges.

For British Gas, customers on its SVT will pay no more than the cap, but the exact unit rates and standing charges are not published. Octopus's Flexible Octopus is known for being straightforward, with no exit fees and a single rate for electricity and gas.

When comparing, consider that the cap is a maximum, not a target. Some suppliers may price below the cap, but that is not common. Check your bill to see which tariff you are on and compare the standing charges and unit rates.

What fixed tariff options are available from British Gas and Octopus Energy in 2026?

Fixed tariff options from British Gas and Octopus Energy vary. British Gas offers fixed deals, but their rates are not always published. Octopus Energy offers fixed tariffs, such as its Fixed Octopus, but the rates depend on market conditions. As of 2026, the price cap is £1,723 for the period October to December.

They may be higher or lower than the cap. British Gas often has fixed deals with no exit fees, but the rates are not publicly listed. Octopus's fixed tariffs are known for being competitive and sometimes include incentives like smart meter discounts.

When comparing fixed deals, look at the unit rates and standing charges, as well as any exit fees. The price cap is a benchmark, but fixed deals can be cheaper if market prices fall. However, if prices rise, a fixed deal can protect you.

Check the supplier's website for current offers, as rates change frequently. Also consider the length of the fix and whether it suits your usage pattern.

How do British Gas and Octopus Energy compare on customer service and complaints?

Customer service and complaints records differ between British Gas and Octopus Energy. British Gas, as a large supplier, has a mixed record, while Octopus Energy often ranks higher in satisfaction surveys. However, specific complaint figures for 2026 are not yet confirmed.

Ofgem publishes complaint data, but the latest available is from previous years. British Gas has historically received a higher number of complaints due to its size, but it has improved. Octopus Energy is known for its customer-centric approach, with UK-based call centres and digital tools.

When choosing, consider the type of support you prefer. British Gas offers phone, email, and online chat, while Octopus also provides these plus a mobile app. Response times and resolution rates vary.

Check independent reviews and Ofgem's complaint data for the most recent figures. Remember that individual experiences can differ, so consider what matters most to you, such as ease of contact or speed of resolution.

What smart meter and time-of-use tariffs do British Gas and Octopus Energy offer?

Smart meters and time-of-use tariffs are available from both British Gas and Octopus Energy. British Gas offers smart meters and has a time-of-use tariff called 'PeakSave', which rewards customers for using electricity outside peak times. Octopus Energy offers 'Agile Octopus', a half-hourly tariff that tracks wholesale prices, and 'Octopus Go' for electric vehicle owners.

These tariffs can help reduce bills if you can shift usage. For example, Octopus's Agile tariff has variable rates that can be very low at night. British Gas's PeakSave offers discounts for off-peak usage, but the exact savings depend on your consumption.

The price cap for October to December 2026 is £1,723, but time-of-use tariffs are not capped in the same way. They can be cheaper or more expensive depending on market conditions.

When considering these tariffs, check if you have a smart meter and whether your usage patterns fit. Also, be aware of any exit fees or conditions. Both suppliers provide smart meters at no upfront cost, but installation times may vary.

Which supplier should a typical UK household pick in 2026?

Choosing between British Gas and Octopus Energy depends on individual priorities. British Gas is a well-established supplier with a wide range of tariffs, but its SVT is not published. Octopus Energy is known for transparency and innovative tariffs, but it may not suit everyone.

For a typical household, the price cap of £1,723 for October to December 2026 sets a baseline. If you value low prices and are willing to switch, compare fixed deals from both. Octopus often has competitive fixed rates, while British Gas may offer loyalty discounts.

Consider customer service: Octopus consistently scores well in surveys, while British Gas has a larger scale but mixed reviews. If you have an electric vehicle or solar panels, Octopus's specialist tariffs might be attractive.

Ultimately, the best choice is the one that meets your needs. Check the latest tariffs on each supplier's website, and use comparison sites to see the full market. Remember that the price cap is a maximum, not a target.

What are the key differences in ownership and market position between British Gas and Octopus Energy?

British Gas is owned by Centrica, a large multinational energy company, while Octopus Energy is an independent challenger backed by Octopus Group. This difference affects their business models and customer approaches.

British Gas has a long history and a large customer base, giving it scale but also legacy costs. Octopus Energy is newer and has grown rapidly, often using technology to lower costs. Its ownership structure allows for more agile decision-making.

In terms of market position, British Gas is one of the 'Big Six' suppliers, while Octopus has become a major player in recent years. Both are subject to Ofgem regulations, but their strategies differ.

For consumers, ownership can influence pricing, innovation, and customer service. Octopus is known for its green initiatives and smart tariffs, while British Gas offers a more traditional service. Consider what aspects matter to you, such as environmental credentials or brand trust.

How do the price cap changes in 2026 affect British Gas and Octopus Energy bills?

The price cap for October to December 2026 is £1,723, a 4% increase from the July to September 2026 cap of £1,663. This affects both British Gas and Octopus Energy customers on standard variable tariffs.

For British Gas, since its SVT is not published, the cap ensures that customers are not overcharged. For Octopus, the Flexible Octopus tariff will adjust to the new cap.

Fixed tariffs are not affected by the cap, so if you are on a fixed deal, your rates remain unchanged until the fix ends. However, new fixed deals may be priced based on expected future cap levels.

When the cap changes, suppliers must notify customers. Check your bill to see if your tariff has changed. If you are on an SVT, you may consider switching to a fixed deal to lock in rates, but weigh the exit fees.

What should you check before switching between British Gas and Octopus Energy?

Before switching between British Gas and Octopus Energy, check your current tariff, usage, and any exit fees. Also, compare the total cost of each supplier's tariff, including standing charges and unit rates.

Use the price cap of £1,723 as a reference, but remember that your actual bill depends on your consumption. If you have a smart meter, you can see your usage patterns and estimate costs.

Check the length of any fixed deal and whether it suits your plans. Also, consider customer service and any additional benefits, such as rewards or green tariffs.

When switching, the process is straightforward, but ensure you have a recent bill and your new supplier will handle the transfer. There is no interruption to supply. Finally, check if you are eligible for any grants or support schemes.

How do British Gas and Octopus Energy compare on green energy and sustainability?

Both British Gas and Octopus Energy offer green tariffs, but their approaches differ. British Gas has a range of tariffs that include renewable electricity, while Octopus Energy is known for its commitment to renewables and innovative green products.

For consumers, the choice depends on how much you value green credentials. Octopus is often rated highly for its environmental efforts, while British Gas is making progress but has a longer way to go.

Check the fuel mix of each tariff and whether they support renewable projects. Also, consider if you want to install solar panels or a heat pump, as some suppliers offer specific tariffs for these technologies.

Glossary: the terms on an energy bill explained

Standard variable tariff: A default energy tariff with no fixed end date, prices can change. Capped by Ofgem's price cap.

Price cap: A maximum price per unit that suppliers can charge for standard variable tariffs, set by Ofgem.

Dual fuel: A single energy contract for both gas and electricity from the same supplier.

Typical domestic consumption values (TDCV): Standard annual usage figures used for comparison: 2,500 kWh electricity and 9,500 kWh gas.

Exit fee: A charge applied if you leave a fixed tariff before its end date.

Time-of-use tariff: A tariff where the price of electricity varies by time of day, encouraging off-peak usage.

Frequently asked questions

Is British Gas cheaper than Octopus Energy in 2026?

It depends on the tariff and your usage. British Gas does not publish its standard variable tariff, so it's hard to compare directly. Octopus Energy publishes Flexible Octopus, which is capped by the price cap. For October to December 2026, the cap is £1,723 for typical dual fuel. Fixed deals may vary. Check the latest rates on each supplier's website.

What is the price cap for October to December 2026?

The price cap for October to December 2026 is £1,723 for a typical dual fuel household using 2,500 kWh electricity and 9,500 kWh gas per year. This is a 4% increase from the previous period's cap of £1,663. The cap applies to standard variable tariffs from all suppliers, including British Gas and Octopus Energy.

Does British Gas have a standard variable tariff?

Yes, British Gas has a standard variable tariff, but its rates are not published. The tariff is capped by Ofgem's price cap, so customers pay no more than the cap. For October to December 2026, the cap is £1,723 for typical dual fuel. To see the exact rates, you would need to log into your account or contact British Gas.

What is Octopus Energy's Flexible Octopus tariff?

Flexible Octopus is Octopus Energy's standard variable tariff. It is a simple, no-frills tariff with no exit fees. The rates are capped by Ofgem's price cap, so for October to December 2026, the typical dual fuel bill is £1,723. It is a popular choice for those who want flexibility without being tied into a fixed deal.

Which supplier has better customer service, British Gas or Octopus Energy?

Octopus Energy generally receives higher customer satisfaction ratings than British Gas in independent surveys. However, individual experiences can vary. British Gas has a larger customer base and offers multiple contact channels. Check Ofgem's complaint data and online reviews for the latest information. Consider what aspects of service matter to you, such as response times or digital tools.

Can I switch from British Gas to Octopus Energy without a smart meter?

Yes, you can switch suppliers without a smart meter. However, having a smart meter can make switching easier and allow you to access time-of-use tariffs. Both British Gas and Octopus Energy offer smart meter installations. If you switch, your new supplier will arrange for a smart meter if you don't have one, but it's not a requirement.