SmartestEnergy Business - Reviews, Prices & Tariffs 

SmartestEnergy Business is a dedicated business energy supplier focused on supplying SMEs with business energy. 

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SmartestEnergy Business - Business Electricity Prices Per kWh

Contract Length

Unit Rate

Standing Charge

Annual Price

1-Year

25.8p

30.4p

£6,547.10

2-Years

26.8p

30.4p

£6,815.32

3-Years

27.4p

30.4p

£6,969.96

These prices were reviewed in June 2025 based on SmartestEnergy Business business energy prices. This is based on an assumed usage of 25,000 kWh of annual electricity consumption. Prices change daily and you may see a different price when comparing. 

SmartestEnergy Business - Business Gas Prices Per kWh

Contract Length

Unit Rate

Standing Charge

Annual Price

1-Year

6.2p

144.3p

£2,085.55

2-Years

6.2p

144.3p

£2,085.16

3-Years

6.2p

144.3p

£2,078.24

These prices were reviewed in June 2025 based on SmartestEnergy Business business energy prices. This is based on an assumed usage of 25,000 kWh of annual gas consumption. Prices change daily and you may see a different price when comparing. 

About SmartestEnergy Business

With very competitive prices, they are quickly gaining popularity with business owners and pride themselves on energy affordability, sustainability and online account management. Our in-depth review to help you understand what they are like as a supplier and if they are the right choice before you compare prices.

Is SmartestEnergy Business a Good Energy Supplier?

SmartestEnergy Business is rated as ‘Excellent’ with a score of 4.3 out of 5.0 on Trustpilot from around 3,500 reviews. Customers typically praise the customer service and knowledge of the market.

They offer a range of renewable business electricity and competitively priced business gas deals. Of course, in many cases this is subjective and each experience is unique, but SmartestEnergy Business is a reliable supplier with great business energy deals. SmartestEnergy Business also offers competitive pricing through its tender offers for energy procurement.

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Is SmartestEnergy Business The Right Supplier For You?

We rate suppliers based on customers' most desired features including payment options, customer satisfaction, renewables and other factors. You can see this snapshot below. 

Features

Service Offered

Online Billing

Yes

Direct Debit

Yes 

Smart Meters

Yes 

Mobile App

Yes

Flexible Payments

Yes

Renewable Energy

Yes

Paper Billing

Yes

Priority Register

Yes (opt-in)
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SmartestEnergy Business FAQs 

  • Who Owns Smartest Energy?

    SmartestEnergy Business is part of it's parent, SmartestEnergy Limited. SmartestEnergy is owned by a Japanese company called the Marubeni Corporation. They have over 49,000 employees spread across 68 countries with their UK headquarters in London. 

    The Marubeni Corporation was founded in 1858 and officially became a UK-registered energy supplier in 2008 under the Smartest Energy brand after initial investment in 2001.

  • Smartest Energy Address

    SmartestEnergy Limited 
    The Columbus Building 
    7 Westferry Circus 
    London 
    E14 4HD

  • Contact Phone Numbers & Email

    Customer services: 01903 703 411

  • Green Performance

    Every megaWatt hour that SMartestEnergy Business supplies to customers on its renewable products is backed with a renewable origin certificate, independently verified by The Carbon Trust.

  • Fuel Mix (Conventional Prodcts)

    The fuel mix for SmartestEnergy Business' conventional products

    • Natural Gas 68%
    • Coal 15%
    • Nuclear 11%
    • Other 7%.

  • Fuel Mix (Renewable Products)

    The Fuel Mix for customers of SmartestEnergy Business' renewable products is:

    • Biomass 54%
    • Hydro 42%
    • Solar 4%.

  • What Is SmartestEnergy Limited?

    SmartestEnergy Limited is the parent company of SmartestEnergy Business. SmartestEnergy Limited supplies flexible energy tariffs to Industrial and Commercial (I&C) customers. While flexible tariffs are not currently available on Power Compare, customers of any size can compare fixed tariffs from SmartestEnergy Business or any other supplier on our panel. 

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