Independent UK energy research

    PowerGuardian Energy Indexes

    Independent UK energy rankings, benchmarks and market trackers designed to help households understand suppliers, tariffs, regional costs, heating performance and home energy efficiency.

    View Latest IndexesRead Our Methodology

    All PowerGuardian indexes show their methodology, source dates, update frequency and limitations.

    Latest index update

    Most recent published period: August 2026 · updated 3 August 2026

    Illustrative data during launch

    The indexes

    One reusable framework, seven indexes. Each shows its methodology, sources, update frequency and limitations.

    Latest index movements

    Standing Charge Tracker

    August 2026

    0.4p/day

    Fixed Tariff Availability Index

    August 2026

    0/100

    Supplier Trust Index

    August 2026

    0.1/100

    Heat Pump Running Cost Index

    August 2026

    9£/yr

    Home Energy Score

    August 2026

    0/100

    Transparent methodology

    Every index publishes its scoring formula, weightings, inclusion rules and how it treats missing data.

    Methodology centre

    Corrections & transparency

    We never silently alter historical results. Every correction is logged publicly with what changed and why.

    Corrections log

    Downloadable reports

    Many indexes have a companion research report with deeper analysis and downloadable data.

    Research Centre

    PowerGuardian indexes are produced independently. Commercial relationships, affiliate links or advertising arrangements do not determine index scores or ranking positions.

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    Compare Energy Suppliers

    Independent PowerGuardian scores for relevant suppliers.

    Octopus Energy

    91/100

    Octopus continues to lead the UK market on customer service and complaint handling, backed by genuinely competitive smart tariffs and strong financial backing. The clear front-runner on our intelligence dashboard.

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    So Energy

    79/100

    Backed by ESB, So Energy combines competitive fixed tariffs with consistently strong service scores. A solid mid-market performer.

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    British Gas

    55/100

    The UK's largest supplier remains financially rock-solid but service and complaint metrics continue to lag the market, with smart-meter billing delays a recurring theme.

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    Best Value Energy Suppliers Report 2026

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