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SmartestEnergy out-of-contract rates, June 2026

SmartestEnergy Limited

SmartestEnergy out-of-contract rates 2026

When a fixed contract ends and a new one is not signed, supply continues at deemed or out-of-contract rates set by the supplier, typically materially higher than fixed-rate offers. Verify the regional figure on SmartestEnergy's own published schedule before relying on it.

Latest published rates

Effective 1 June 2026
Electricity
43.00p/kWh
Standing charge 400 p/day
Deemed (Standard) tariff, non-half-hourly, Profile Class 1-4
Effective 1 June 2026

Profile Class 5-8 carries the same 43 p/kWh unit rate on a 500 p/day standing charge. Half-hourly deemed is 49 p/kWh with a regional standing charge from 698.51 to 1,352.68 p/day.

Source
Gas
13.00p/kWh
Standing charge 600 p/day
Deemed (Standard) tariff, all meters
Effective 1 June 2026
Source
Schedule effective
1 June 2026
We last checked
21 August 2026
Where these come from
Supplier's own published rate schedule

SmartestEnergy runs two variable schemes. Deemed applies when you move into a site they already supply, and is shown here. A fixed contract that simply ends rolls onto the cheaper SmartFlex tariff instead: 34 p/kWh electricity on 350 p/day, 3.9 p/kWh gas on 500 p/day, effective April 2026. Rates exclude DUoS, TNUoS and CCL pass-throughs, which add materially to the billed cost.

SmartestEnergy deemed rates pageSmartestEnergy business website

Last reviewed 21 August 2026. Always verify rates with the supplier before relying on them.

At a glance

SMARTESTENERGY LIMITED (Companies House 03994598) is the licensed UK retail entity owned by JPN. Registered office: The Columbus Building, 7 Westferry Circus, London, E14 4HD. Latest filed turnover £761m (year ending 2025) with 755 employees.

Last verified 7 May 2026 · Sources: Companies House (03994598), Citizens Advice non-domestic league table, Ofgem licence register.

SmartestEnergy business contact

Direct lines for business customers

Phone
01903 703400
Email
quote.business@smartestenergy.com; meterreadings.business@smartestenergy.com
Contact page
Open on SmartestEnergy

Sourced from SmartestEnergy's official contact page. Verify before relying on these details for billing or contract-end disputes.

SmartestEnergy is one of the UK's larger C&I-focused suppliers, founded in 2001 and wholly owned by Japanese trading house Marubeni Corporation. The business specialises in renewable PPAs, REGO trading and providing independent generators with a route to market.

Parent
Marubeni Corporation (Japan)
Founded
2001
Headquarters
London
Latest revenue
Not published

SmartestEnergy business profile

Independent company data for the licensed retail entity, drawn from the latest filed accounts and statutory registers. Refreshed monthly. Not a credit recommendation.

Last refreshed 7 May 2026

Risk band
Stable
Score 62/100
Healthy, broadly stable profile with no immediate concerns.
Recommended credit limit
£20m
Provider's guidance, not a Purely Energy recommendation.
Turnover (latest filed)
£761m
Year ending 31 March 2025
Total assets
£1.8bn
Creditor days 39
Headcount (filed)
755
As of 31 March 2025
Next accounts due
31 December 2026
Parent company
JPN

5-year financial trend

Turnover CAGR +32.3% over 4 years

Year endingTurnoverYoY
31 March 2025£761m+52.2%
31 March 2024£500m-26.3%
31 March 2023£679m+168.3%
31 March 2022£253m+2.0%
31 March 2021£248m-

Sourced from filed accounts at Companies House. YoY = year-on-year turnover change. CAGR = compound annual growth rate across the window shown.

Latest filed profit and loss

Year ending 31 March 2025

Turnover
£761m
Gross profit
£334m
Operating profit
£174m
Pre-tax profit
£161m
EBITDA
£180m
Dividends
£142m

Registered office

The Columbus Building, 7 Westferry Circus, London, E14 4HD

London · Tower Hamlets

Auditor

Ernst & Young LLP

Active officers· 57 on the public register

  • MR MASAO IMAZATO· D· COMPANY DIRECTOR· since 2019LinkedIn ↗
  • MR YOSHIHIRO MEGATA· D· DIRECTOR· since 2003LinkedIn ↗
  • MR NOBUHIRO YABE· D· COMPANY DIRECTOR· since 2020LinkedIn ↗
  • MARK LIDDELL HALLIDAY· D· since 2000LinkedIn ↗
  • MR MUTSUMI ISHIZUKI· D· COMPANY DIRECTOR· since 2019LinkedIn ↗
  • KENJI NATORI· D· GENERAL MANAGER· since 2001LinkedIn ↗
  • MR TOMOKI NISHINO· D· COMPANY DIRECTOR· since 2020LinkedIn ↗
  • TATSUYA OZONO· D· DIRECTOR· since 2005LinkedIn ↗
  • MR TATSUYA OZONO· D· COMPANY DIRECTOR· since 2019LinkedIn ↗
  • HIROSHI TOYOSHIMA· D· DIRECTOR· since 2004LinkedIn ↗

Plus 47 more on the public register.

Industry (SIC07)

  • 35230: Trade of gas through mains · ELECTRICITY, GAS, STEAM AND AIR CONDITIONING SUPPLY
  • 35230: Trade of gas through mains · ELECTRICITY, GAS, STEAM AND AIR CONDITIONING SUPPLY
  • 35140: Trade of electricity · ELECTRICITY, GAS, STEAM AND AIR CONDITIONING SUPPLY
  • 35140: Trade of electricity · ELECTRICITY, GAS, STEAM AND AIR CONDITIONING SUPPLY
  • 35200: Manufacture of gas; distribution of gaseous fuels through mains
  • 35130: Distribution of electricity · ELECTRICITY, GAS, STEAM AND AIR CONDITIONING SUPPLY

Trading history and former names

  • FIRESCAPE LIMITED, 2000 to 2000

Outstanding charges

3 on the public register

  • NORD POOL AS · 1 July 2019
  • NASDAQ OMX STOCKHOLM AB · 15 September 2010
  • BRITISH OVERSEAS BANK NOMINEES LIMITED AND WGTG NOMINEES LIMITED · 7 June 2005

Public contact details

Telephone
+448003163105
Email
customer-services@smartestenergy.com

VAT number GB773846584

Frequently asked

SmartestEnergy: questions answered

Who owns SmartestEnergy?

SMARTESTENERGY LIMITED (Companies House number 03994598) is part of JPN, incorporated on 16 May 2000.

What is SmartestEnergy's credit rating and financial position?

Based on the latest filed accounts at Companies House, SMARTESTENERGY LIMITED has a credit score of 62/100, a derived risk band of Stable, a recommended credit limit of £20m, turnover of £761m (FY25). Full figures and source filings are in the business profile section above.

What is SmartestEnergy's registered office and how do I contact them?

SMARTESTENERGY LIMITED's registered office is The Columbus Building, 7 Westferry Circus, London, E14 4HD. Public contact details: telephone +448003163105, email customer-services@smartestenergy.com. For broker enquiries via Purely Energy, see the contact panel above.

What are SmartestEnergy's turnover and financial accounts?

SMARTESTENERGY LIMITED's most recently filed accounts (year ending 2025) show turnover of £761m, operating profit of £174m, total assets of £1.8bn, 755 employees. Annual accounts are filed at Companies House and refreshed in our profile monthly.

What are SmartestEnergy's out-of-contract rates for businesses?

As of 2026-06-01, SmartestEnergy's out-of-contract rates are electricity at 43p/kWh with a 400p/day standing charge; and gas at 13p/kWh with a 600p/day standing charge. Rates vary by region and meter type — verify on SmartestEnergy's own published schedule before relying on them.

Is SmartestEnergy safe for business customers?

SMARTESTENERGY LIMITED holds a valid Ofgem electricity and gas supply licence, files audited accounts at Companies House, with latest turnover of £761m. We do not give financial advice; verify the latest filings and any recent enforcement actions before signing a long-term contract.

Can I get a fixed business gas or electricity quote from SmartestEnergy via Purely Energy?

Yes. As an independent broker we tender against SmartestEnergy alongside 30+ tier-1 UK suppliers. Each quote breaks the unit price into wholesale energy, non-commodity costs, supplier margin, and our broker margin so you see exactly what you are paying. Request a comparison via the buttons above.

Sources and references

We are an independent UK B2B energy broker. Profile data is sourced from the public registers above and refreshed monthly. Not a credit recommendation. Verify recent filings before relying on any figure.

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We run your consumption against the UK market and come back with the best fit, with wholesale price, non-commodity costs, supplier margin and our margin shown separately on every quote.

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