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UK business energy supplier

Corona Energy business

Founded in 1995 and headquartered in Watford, Corona Energy supplies gas and electricity to UK businesses. Compare tariffs, contract terms, customer service and complaints below.

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Founded 1995 About 10,000+ SMEs (plus corporate and public-sector portfolios) Watford B2B specialist

Founded

1995

Years supplying UK businesses

Customers

About 10,000+ SMEs (plus corporate and public-sector portfolios)

Business sites served

Fuels

Gas, electricity and dual fuel

Energy types offered

Business sizes

Small business (SMEs), corporate multi-site, public sector, partners (brokers and consultants). Roughly 75% microbusiness/SME, 25% Industrial & Commercial.

Customer segments served

About

Who is Corona Energy?

Founded in 1995 and acquired by the Australian financial group Macquarie in 2006, Corona Energy is one of the UK's established mid-market business energy suppliers. It supplies gas, electricity and dual-fuel offers to 10,000+ SMEs alongside corporate and public-sector multi-site portfolios, with fixes up to 36 months and a 100% renewable electricity option.

Registered as Corona Energy Retail 4 Ltd, Corona Energy 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 Watford, where it runs its commercial operations, account management and regulatory liaison with Ofgem.

Corona Energy was established in 1995. A longer track record means more years operating under Ofgem rules and a wider history of business-customer relationships.

Corona Energy is part of the Macquarie Group (Australia) 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

Corona 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 Corona Energy quote.

Up to 36 months

Fixed-rate tariffs

  • Unit rate and standing charge locked
  • Best for budget certainty
  • Useful where you expect the wholesale market to move against you

Variable

Flexible tariffs

  • Variable unit rate customised to consumption profile
  • Better suited to multi-site I&C customers
  • Lets you react to wholesale moves

Add-on

100% renewable electricity

  • Available across both fixed and flexible products
  • REGO-certified
  • Useful for businesses serious about going green

Variable

Deemed / out-of-contract

  • Applied when moving into a Corona-supplied property without a contract
  • Or when an existing contract expires without renewal
  • Rates always more expensive than negotiated contracts
  • Can change without notice

Review

Corona Energy,pros and cons

Corona Energy reviews are mixed. It is a Macquarie-owned, business-only supplier (founded 1995) with genuine financial stability, a solid myCorona portal, a straightforward tariff structure and a real 100% renewable option. Customers who deal with a named account manager tend to praise the sales and onboarding, but the recurring criticism across public reviews is billing accuracy — invoices that do not match submitted meter reads, and slow query resolution. Our verdict: usable if you audit every bill and benchmark every quote, but not a default choice for service. Selectra editorial verdict: 2.5 / 5.

Strengths

  • Established, Macquarie-owned mid-market supplier — financial stability behind the brand.
  • 100% renewable electricity available across the product range, not just on premium tariffs.
  • Fixes available up to 36 months, useful for budget certainty on multi-year planning.
  • myCorona portal handles meter reads, billing history, consumption and case tracking.

Watch-outs

  • Public reviews are mixed and skew negative on day-to-day service; read recent reviews before signing.
  • Recurring complaints about inaccurate invoices that do not reflect submitted meter reads.
  • Reports of bills and chaser letters sent to people who say they were never Corona customers.
  • No published price list — every quote is bespoke and must be benchmarked against alternatives.

Renewables

Corona Energy green credentials

100%-renewable electricity add-on certified by REGO. Available across both fixed-rate and flexible products — not restricted to premium tariffs.

Renewable electricity 100%

Timeline

Corona Energy: key dates

A short timeline of Corona Energy: founding, milestones, regulatory events.

  1. 1995

    Corona Energy founded as an independent UK business energy supplier.

  2. 2006

    Acquired by the Australian financial group Macquarie; continues to operate under that ownership today.

Save up to £600 per year
Independent comparison

Is Corona 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

Corona Energy,frequently asked questions

Corona Energy reviews are mixed. Business customers who deal directly with an account manager tend to praise the relationship-driven sales and smooth onboarding, while the most common criticism across public reviews is billing accuracy, with invoices that do not always reflect submitted meter reads. As an established, Macquarie-owned supplier it is financially stable, but the service reputation makes it essential to audit every bill and benchmark any quote against the wider SME market before signing.

Raise the issue first with Corona Energy's customer-service team by email at [email protected], or in writing to Building 2, Level 2, Croxley Park, Watford WD18 8YH, quoting your account number. Corona aims to report back within 48 hours and to issue a full conclusion within 10 working days. If you are unhappy with the outcome, escalate to [email protected] with the original reference.

Corona Energy is covered by the Energy Ombudsman (formerly the Ombudsman Services: Energy scheme), the free, independent body that resolves unresolved disputes between energy suppliers and microbusiness customers. If your complaint is not resolved within 8 weeks, or you receive a deadlock letter sooner, you can refer it free of charge to the Energy Ombudsman. Its decision is binding on Corona but not on you.

A range of flexible and fixed-rate tariffs tailored to business size and projected consumption, with fixes available up to 36 months. A 100% renewable electricity add-on is available for businesses going green. There is no published price list — every quote is bespoke, so it should always be benchmarked against alternatives before you commit.

You are placed on a deemed (out-of-contract) tariff when you move into a Corona Energy-supplied property without signing a contract, or when your previous Corona contract ends without renewal. Deemed rates are always more expensive than negotiated contracts and can change without notice, so switch or sign a new contract as soon as you can.

Go to the Corona Energy homepage and click the head-and-shoulders icon in the top right — this takes you to the myCorona sign-in page. Enter the username and password sent in your welcome email after you registered with the myCorona team, and use "Forgotten password" to reset by email if needed.

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