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UK business energy supplier

British Gas Business business

Tariffs, customer service, contract terms and complaints for British Gas Business,a UK business energy supplier regulated by Ofgem.

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About 500,000 UK businesses Windsor, Berkshire Big Six member

Customers

About 500,000 UK businesses

Business sites served

Fuels

Electricity + gas (dual fuel)

Energy types offered

Business sizes

SME, microbusiness, mid-market, Industrial & Commercial (Energy360 from £100k+ annual spend), multi-site

Customer segments served

About

Who is British Gas Business?

British Gas Business is the SME, mid-market and Industrial & Commercial arm of Centrica plc — the UK's largest non-domestic energy supplier by customer count, serving around half a million businesses. Headline rates sit above challenger suppliers, but the service catalogue (smart meters, boilers, EV charge points, Energy360) is the deepest in the market.

Registered as British Gas Trading Limited, British Gas Business uses this legal name for Ofgem licence filings, B2B contracts and any formal communications. The trading name customers see on invoices is the shorter, recognisable form.

The company is headquartered in Windsor, Berkshire, where it runs its commercial operations, account management and regulatory liaison with Ofgem.

British Gas Business is part of the Centrica plc group, which provides shared governance, financial backing and a wider pool of expertise in wholesale trading, hedging and regulatory work.

The company is regulated by Ofgem, and complaints fall under the Energy Ombudsman alternative dispute resolution scheme,but only for microbusinesses with under 10 staff and under £2m turnover. Larger I&C customers must take complaints through commercial dispute resolution.

Contracts

BG Business tariff types

Business energy is priced bespoke to your annual consumption and contract term. The headline contract shapes below are the ones you will see on a British Gas Business quote.

1, 2 or 3 years

Fixed Price Energy Plan

  • Unit rate locked for the contract term
  • Insulates from wholesale rises
  • Renewal quote arrives ~60 days before end date, valid for 30 days
  • Miss renewal window: rolls to variable plan

30-day notice

30-Day Rolling Energy Plan

  • For new customers only
  • Unit rates and standing charges can move month-to-month
  • 30 days' notice of any price change
  • Walk away with 30 days' notice
  • Best for businesses expecting to move or restructure short-term

1 to 5 years

Large & I&C tariffs (Energy360)

  • For businesses spending >£100,000/year
  • Bespoke fixed plans
  • Renewable-electricity options
  • 30-minute interval consumption data
  • Dedicated account managers
  • Sales line: 0333 122 9919

Variable

Deemed / out-of-contract

  • Applied automatically when moving into a property already supplied by BG Business
  • Or when a fixed contract ends without renewal
  • Materially more expensive than a negotiated contract

Review

British Gas Business,pros and cons

Biggest is not always cheapest — but the service depth is real. BG Business wins on incumbency: most SMEs inherit it when they move into a new property. Customer service and mobile apps score well in business reviews, but headline rates run above challenger suppliers and boiler-service waits are a recurring grumble. The Industrial & Commercial tier (Energy360) is where the proposition is strongest. Selectra score 3.5 / 5.

Strengths

  • Largest non-domestic brand in the UK — incumbent on most commercial sites.
  • Broad service catalogue: smart metering, boiler installation/repair, EV charge points, plumbing & drainage, commercial air-conditioning.
  • Fuel mix is materially greener than the UK average — 56% renewables vs UK 33%.
  • Industrial & Commercial tier (Energy360) offers 30-minute interval data and dedicated account managers.

Watch-outs

  • Headline unit rates routinely above challenger and SME-only suppliers.
  • Recurring complaints about long waits for boiler service and repair visits.
  • Standard tariff is not 100% renewable — green add-on priced at the upper end of market.
  • Maze of phone lines: 17+ separate numbers depending on query type.

Renewables

British Gas Business green credentials

Declared fuel mix: 56% renewables, 29% natural gas, 9% nuclear, 4% coal, 2% other (vs UK averages of 33%, 41%, 19%, 5%, 2%). CO2 emissions 157g/kWh vs UK average 208g/kWh. Standard tariff is not 100% renewable — a separate renewable electricity add-on is available, priced at the upper end of the market.

Renewable electricity 56%

Timeline

British Gas Business: key dates

A short timeline of British Gas Business: founding, milestones, regulatory events.

  1. 1986

    British Gas plc formed when the state-owned British Gas Corporation was privatised.

  2. 1997

    Centrica plc demerged from British Gas plc and took on the energy supply business.

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Independent comparison

Is BG Business the cheapest option for your business?

UK businesses can save up to £600 per year by switching to a supplier whose contract shape fits their actual usage profile. Get a free, no-obligation quote from a Selectra B2B broker in under two minutes.

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Common questions

British Gas Business,frequently asked questions

British Gas Business is regulated by Ofgem under a non-domestic supply licence. Whether it suits your business depends on your annual consumption, contract term and whether you need extra services (HHM, green certification, smart-meter rollout). Always compare delivered p/kWh including VAT and CCL before signing.

Switching takes between three weeks and two months for a business contract, longer than the domestic five-working-day rule. British Gas Business will run a credit check, request your annual consumption and a recent meter reading, and arrange the transfer with your current supplier. Supply is never interrupted during the switch.

Fixed 1/2/3 years; 30-day rolling (new customers); I&C bespoke up to 5 years; deemed / out-of-contract variable

Most UK fixed-term business contracts include termination fees if you switch mid-contract. The supplier must accept your renewal notice in the final 30 to 60 days before the contract end-date (the renewal window varies by supplier and is set out in the original contract). Outside that window you are tied in unless you pay the exit charge.

You can reach British Gas Business on 0330 100 0222, Mon-Fri, 9am-6pm. For a full breakdown of phone lines (sales, emergency, complaints, meter readings, account moves), see the British Gas Business contact page.

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