Octopus Energy vs British Gas: Which Should You Pick?

Octopus Energy vs British Gas usually comes down to two things for a bill-conscious household: the price per unit in your region and whether you value low-cost fixed deals or specialist smart tariffs. Neither supplier is cheaper for everyone. Octopus Energy is known for its app, EV and smart tariffs; British Gas is a long-established supplier that has, at times in 2026, offered some of the lower-priced fixed deals on the market.

If you are on a standard variable tariff sitting near the price cap, both suppliers offer fixed and tracker options that could reduce what you pay, but the right choice depends on your usage pattern, whether you have an electric vehicle or solar panels, and how much you care about exit fees. Free Price Compare sources its energy data from Ofgem publications and supplier tariff sheets, and compares live tariffs across the whole domestic market so you can check both suppliers against every other option in your postcode.

Last updated: August 2026

Written by the Free Price Compare editorial team | Reviewed August 2026

Is Octopus Energy cheaper than British Gas?

Octopus Energy is not always cheaper than British Gas, and the answer depends on your region, meter type and payment method. In August 2026, tariff examples showed British Gas fixed deals and Octopus fixed deals were in a similar price band for a typical-use estimate, with British Gas slightly cheaper on some fixed products. Octopus’s Flexible Octopus variable tariff was competitive on annual cost and had no exit fee. These are indicative annual estimates for a typical dual-fuel home, not a fixed bill, and your own figures depend on how much gas and electricity you actually use.

The common assumption that Octopus is automatically the cheapest does not hold across all regions. In several areas, Octopus unit rates for electricity ran higher than the cheapest available fixed deals. The only reliable way to know which is cheaper for your home is to compare live prices for your exact postcode and usage.

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How do their tariffs compare on price in 2026?

British Gas and Octopus tariffs in 2026 both fell into a broadly similar annual-cost band once you account for a typical dual-fuel household, but the details differ on standing charges and exit fees. The table below uses indicative tariff examples for a typical-use dual-fuel home to show the shape of the market. All prices include VAT.

Figures are indicative and may change. These annual costs are typical-use estimates for a dual-fuel home and vary by region, meter type and payment method.

The pattern in these examples is that British Gas offered some of the lower-priced fixed deals, while Octopus’s variable tariff stayed competitive on annual cost and carried no exit fee. For a household weighing certainty against flexibility, that trade-off matters more than a small headline-price gap. To see how each stacks up against other suppliers, our Octopus Energy vs OVO Energy comparison and British Gas vs Scottish Power guide add useful context.

How does the Ofgem price cap affect both suppliers?

Ofgem’s price cap sets the maximum unit rates and standing charges a supplier can charge on a standard variable tariff, and it applies to both Octopus Energy and British Gas. For 1 July to 30 September 2026, the cap is 24.67p/kWh for electricity and 5.74p/kWh for gas, with a 57.21p/day electricity standing charge and a 29.09p/day gas standing charge, according to Ofgem.

The cap limits unit rates and the standing charge for a typical user, not a fixed total bill, so your actual cost still depends on how much energy you use. A fixed tariff from either supplier can protect you from the next cap change, but it locks in today’s rates, which may end up higher or lower than a future cap. Octopus said it was keeping some prices below the cap as bills rose again, though not every tariff sits below the cap benchmark.

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What exit fees will I pay if I switch?

Exit fees are a charge some suppliers apply if you leave a fixed tariff before it ends, and they differ notably between Octopus and British Gas fixed deals. Octopus fixed tariffs typically carried an exit fee, while its Flexible Octopus variable tariff had no exit fee at all. British Gas fixed products in the same period ranged from lower to higher exit fees depending on the tariff, with several sitting at £100 or more.

Exit fees only apply while you are inside a fixed term. If you are on a standard variable tariff with either supplier, you can switch away without penalty. Under Ofgem rules, you also enter a 14-day cooling-off period when you sign up to a new fixed deal, during which you can cancel without an exit fee. If you expect to move home or switch again within the year, a no-exit-fee variable tariff or a fixed deal with a low exit charge gives you more room to change your mind.

Is the Octopus Tracker tariff worth it vs British Gas fixed?

The Octopus Tracker tariff is worth considering if you are comfortable with prices that move with wholesale costs, whereas a British Gas fixed tariff suits households that want certainty. A tracker tariff adjusts your unit rates in line with a published wholesale index, so your bills can fall when wholesale energy is cheap and rise when it is expensive. A fixed tariff locks your unit rates for the term regardless of what wholesale prices or the Ofgem price cap do.

For a bill-conscious household that dislikes surprises, a British Gas fixed deal removes the guesswork and can be budgeted month to month. For a household willing to watch the market and shift usage to cheaper periods, a tracker can pay off during lower-price spells, but there is genuine risk if wholesale prices climb. Neither is automatically better value; it depends on your appetite for price movement and how closely you want to manage your usage.

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Which is better for EVs, solar, heat pumps or batteries?

Octopus Energy is generally the stronger choice for EV drivers, solar-plus-battery homes and heat-pump owners, because it runs specialist smart tariffs that British Gas does not match like-for-like. Octopus’s tariff range in August 2026 included Octopus Go for overnight EV charging, Octopus Cosy aimed at heat-pump households, and Octopus Flux for homes with solar panels and battery storage. These smart tariffs use a smart meter to reward off-peak or self-generated usage.

If you have an electric vehicle and can charge overnight, a dedicated EV tariff with cheap off-peak electricity can reduce charging costs compared with a single flat rate. For solar and battery owners, an export-focused tariff can improve what you earn from electricity you send back to the grid. British Gas offers standard fixed and variable domestic tariffs and some EV options, but Octopus’s smart-tariff range is broader. If low-carbon tech is central to your home, our Octopus Energy vs E.ON Next comparison is also worth a look for another smart-tariff angle.

How good is customer service with each supplier?

Octopus Energy has a strong reputation for customer service and its app, while British Gas is a large established supplier with wider high-street recognition and a broad service network. Octopus said it had reached 8 million UK customers by April 2026 and that it remained the UK’s largest supplier. That scale, combined with its digital tools, is a large part of why many households choose it.

Service experience is subjective and varies from account to account. If you value app-based control, smart-tariff features and quick online switching, Octopus tends to appeal. If you prefer a supplier with a long track record and a wide service and boiler-cover offering, British Gas has that history. Whatever you choose, both suppliers are bound by the same Ofgem standards, and if a complaint is unresolved after eight weeks you can escalate it to the Energy Ombudsman for free.

How do I switch British Gas to Octopus (or the other way)?

Switching between British Gas and Octopus takes a few minutes to start online and usually completes within around five working days, with your new supplier managing the move. Start by taking a recent meter reading and finding your current tariff details and annual usage in kWh, which appear on a recent bill. Then compare live tariffs for your postcode, choose the deal that suits your usage, and sign up; your new supplier notifies your old one, so you do not need to contact them yourself.

Your gas and electricity supply is never interrupted during a switch, and you keep the same meters and cables. If you switch to a fixed deal and change your mind, the 14-day cooling-off period lets you cancel without an exit fee. Before switching away from a fixed tariff, check whether an exit fee applies. To weigh both suppliers against the rest of the market, compare energy deals in one place.

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Who should choose Octopus and who should choose British Gas?

Choose Octopus if you own an EV, solar panels or a heat pump, want app-based control, or prefer a no-exit-fee variable tariff you can leave any time. Octopus’s smart-tariff range and digital service suit households that want to shift usage to cheaper periods and manage everything online. A no-exit-fee variable tariff also suits anyone who might move home or switch again soon.

Choose British Gas if a low-priced fixed deal and price certainty matter more to you than smart features, and you are comfortable with a higher exit fee in return for a locked rate. Some British Gas fixed products were among the lower-priced options on the market. The right pick still depends on your postcode, usage and how you pay, so compare both against every other supplier before deciding. Our Octopus vs ScottishPower guide and British Gas vs EDF Energy guide help you widen the comparison.

• Octopus Energy vs OVO Energy: Best Smart Meter Tariffs
• E.ON Next vs OVO Energy: Best Tariffs & Service in the UK
• Octopus Energy vs ScottishPower: Best Tariffs & Service
• E.ON Next vs Scottish Power: Best Tariffs & Service
• So Energy vs British Gas Which Is the Better Supplier?

Information correct as of 20 August 2026. Prices, tariffs, policy details and providers change frequently, so please check the latest details before making a decision. This article is for general information only and does not constitute financial advice. Free Price Compare is authorised and regulated by the Financial Conduct Authority (FCA).