ESOS Energy Audit Services

An ESOS energy audit is a core requirement of the Energy Savings Opportunity Scheme, designed to identify cost-effective opportunities to reduce energy consumption across an organisation.

Carbon Numbers Investments supports ESOS energy audits by ensuring identified opportunities are not only reported, but funded and delivered through a guaranteed performance model.

Book an ESOS ConsultationBook an ESOS Consultation

What an ESOS Energy Audit Covers

An ESOS energy audit must assess at least 90% of total energy consumption across buildings, transport and industrial activity. The audit identifies efficiency opportunities but does not require implementation.

Carbon Numbers Investments bridges this gap by funding and delivering audit-aligned measures, ensuring ESOS energy audits result in tangible outcomes rather than static reports.

What an ESOS Energy Audit Covers

An ESOS energy audit must assess at least 90% of total energy consumption across buildings, transport and industrial activity. The audit identifies efficiency opportunities but does not require implementation.

Carbon Numbers Investments bridges this gap by funding and delivering audit-aligned measures, ensuring ESOS energy audits result in tangible outcomes rather than static reports.

What Is ESOS?

ESOS is a UK Government scheme requiring large organisations to undertake regular energy audits covering:

  • Buildings

  • Transport

  • Industrial processes

Compliance is required every four years and must be approved at board level. Failure to comply can result in financial penalties, reputational damage and increased regulatory scrutiny.

The Challenge with Traditional ESOS Compliance

As a result, ESOS becomes a reporting exercise rather than a driver of measurable improvement.

  • Unfunded recommendations
  • Competing capital priorities
  • No guarantee of savings
  • Delivery and performance risk
  • Limited audit-ready evidence of action

Many organisations complete ESOS audits but fail to realise the value identified. Common challenges include:

What Is ESOS?

ESOS is a UK Government scheme requiring large organisations to undertake regular energy audits covering:

  • Buildings

  • Transport

  • Industrial processes

Compliance is required every four years and must be approved at board level. Failure to comply can result in financial penalties, reputational damage and increased regulatory scrutiny.

The Challenge with Traditional ESOS Compliance

As a result, ESOS becomes a reporting exercise rather than a driver of measurable improvement.

  • Unfunded recommendations
  • Competing capital priorities
  • No guarantee of savings
  • Delivery and performance risk
  • Limited audit-ready evidence of action

Many organisations complete ESOS audits but fail to realise the value identified. Common challenges include:

Book an ESOS ConsultationBook an ESOS Consultation
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Funded ESOS Delivery Through Carbon Numbers Investments

Carbon Numbers Investments transforms ESOS compliance into a funded delivery programme.

Through an investment-led Energy Performance Contract, we:

  • Fund ESOS-aligned energy efficiency measures in full
  • Deliver projects without upfront client capital
  • Guarantee energy, cost and carbon savings
  • Transfer performance risk away from the organisation

This ensures ESOS recommendations are implemented — not deferred.

Carbon Numbers Investments

Benefits of an Investment-Led ESOS Solution

  • Full ESOS compliance with board-level assurance
  • Zero capital expenditure
  • Guaranteed kWh, cost and carbon savings
  • Reduced operational and compliance risk
  • Clear, auditable delivery evidence

Who This Is For

Our ESOS compliance solutions are designed for organisations seeking:

  • Certainty of outcomes
  • Budget discipline
  • Governance and audit readiness
  • Measurable progress toward net zero

How Our ESOS Compliance Model Works

  • 1. Energy Baseline & ESOS Audit
    Validated analysis of energy consumption, baseload and asset performance.
  • 2. Opportunity Identification
    ESOS-compliant efficiency measures are modelled and prioritised.
  • 3. Investment & Contracting
    Carbon Numbers Investments funds approved measures with no capital outlay.
  • 4. Delivery & Verification
    Projects are delivered, monitored and verified against agreed baselines.
  • 5. Ongoing Performance Assurance
    Savings are guaranteed and reported throughout the contract term.

Carbon Numbers Investments

Speak to an ESOS Specialist

If you are approaching an ESOS phase or want to act on historic audits, Carbon Numbers Investments can help you deliver compliance with confidence.

Carbon Numbers Investments

Speak to an ESOS Specialist

If you are approaching an ESOS phase or want to act on historic audits, Carbon Numbers Investments can help you deliver compliance with confidence.

Unlock Profitable Sustainability — No Capital Outlay. Guaranteed Returns.Unlock Profitable Sustainability — No Capital Outlay. Guaranteed Returns.

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Why Carbon Numbers Investments?

  • Investment-led, not installation-led
  • Performance guaranteed contractually
  • Capital preserved, risk transferred

  • Part of the Carbon Numbers Group

What to Expect

Focused on financial, regulatory and operational considerations

How We Can Help

Funded energy and asset performance improvements