01 May 2026
Using energy is unavoidable, but the way it is managed has never been more important. Having a clearer understanding of how and where energy is used can make a meaningful difference to both short-term costs and long-term planning.
A simple, well-planned energy audit can help organisations uncover inefficiencies, reduce unnecessary energy spend and address inefficient practices that may have developed over time. Whether you’re a large organisation or an SME, an audit provides a structured way to review energy use and identify opportunities to improve performance and control costs.
In this guide, we’ll explore why energy audits are worth carrying out, how auditing differs from energy due diligence, the different types of audit available, how to prepare, and how to turn findings into practical action.
Why carry out an energy audit of your business?
There is still a misconception that energy audits are time‑consuming, disruptive or overly technical. In reality, they are often one of the most accessible ways for an organisation to gain visibility over its energy use.
An audit provides a clear overview of how energy is consumed across your business, helping to highlight areas where costs may be higher than necessary. By pinpointing where energy is being wasted, audits can support cost reduction over time and provide a clear roadmap for improving efficiency.
A thorough audit looks beyond individual pieces of equipment. It considers how a building’s interior, exterior, fixtures and systems interact with one another, often revealing inefficiencies that routine checks or maintenance cycles may not catch. This broader view is particularly valuable in today’s energy landscape, where even small inefficiencies can have a noticeable impact on costs.
Energy audits can also support wider business objectives. They often underpin efficiency programmes, feed into procurement discussions, and contribute to sustainability or decarbonisation planning. Used alongside informed contract choices and regular market insights, audits form an important part of a more resilient energy strategy.
How does energy auditing differ from energy due diligence?
Energy audits are sometimes confused with energy due diligence, but they serve different purposes.
An energy audit focuses on understanding how energy is used day to day, identifying inefficiencies and opportunities to improve performance within existing operations. It is a practical, action‑orientated process designed to support informed decision‑making.
Energy due diligence, by contrast, is typically carried out during transactions such as mergers, acquisitions or major property changes. Its purpose is to assess energy‑related risks, liabilities and contractual exposure, rather than to optimise ongoing performance.
Understanding the distinction helps ensure the right process is used for the right objective.
What are the different types of energy audit?
Energy audits can vary significantly in scope and depth. The most appropriate type of audit depends on factors such as the size of your organisation, the complexity of your operations and what you’re hoping to achieve.
Common types of audit include:
Not every organisation needs an in depth audit from the outset. Many businesses start with a simpler review, using the findings to decide whether further investigation would be worthwhile.
How to prepare for an energy audit
Preparation doesn’t need to be complex, but gathering the right information upfront can improve the quality of the audit.
Useful preparation steps include:
Today, many businesses have access to more detailed consumption data through smart or advanced metering. This is particularly relevant as the industry transitions to Market wide Half Hourly Settlement (MHHS), which will see all electricity usage settled on half hourly data.
Defining clear objectives from the outset – whether reducing costs, improving forecasting, or supporting compliance requirements – will also help shape the audit process.
The audit process: initial steps
An energy audit usually involves a combination of data analysis and a physical walkthrough of the site.
During this process, auditors typically assess:
Looking at energy use in real operating conditions helps identify inefficiencies that might otherwise remain hidden. This holistic approach is often where audits deliver the greatest value.
Taking action on audit findings
The most important stage of an energy audit is what happens after it’s completed.
Audit findings should be translated into a clear, prioritised action plan that considers impact, feasibility and cost. Many organisations begin with no or low cost changes, such as simple operational adjustments or improved controls, before progressing to equipment upgrades where there is a clear business case.
In today’s market, audits are frequently used alongside procurement reviews to ensure energy contracts and purchasing strategies reflect how energy is actually used. Understanding consumption patterns can help businesses choose the most appropriate contract structure and avoid unexpected costs.
Making a business case using energy audit findings
One of the key strengths of an energy audit is the evidence it provides. By quantifying inefficiencies and linking improvements to cost savings or reduced risk, audits help strengthen internal business cases for action.
They can also:
Presenting audit findings in a clear, structured way helps ensure recommendations are understood and acted upon.
Additional tips and best practice
Energy audits tend to deliver the most value when treated as an ongoing process rather than a one off exercise. Reviewing energy performance regularly, tracking improvements and updating action plans helps ensure gains are maintained over time.
Often, there are quick improvements that can be made simply by putting an end to bad habits or investing in small-scale technology upgrades. For example, thermostats can be moved away from draughts, windows, and skylights, and lighting can be turned off when not in use (either manually or by using a timer and sensors). Efficiency gains can also be achieved through replacing old equipment – a kitchen fridge over 10 years old will most likely not perform as well as a newer model, and old lightbulbs can be replaced with much more efficient options such as CFL or LED bulbs.
Installation or optimisation of building management systems (BMS) can complement energy saving behaviours. Setting controls to ensure that that heating and lighting patterns mirror actual occupancy patterns can minimise periods of wasted energy, as well as reducing the need for building users to manage controls themselves.
Combining audit insights with regular market updates can also help organisations stay ahead of changing conditions. Our Insights & Resources hub provides ongoing commentary on energy market developments, regulatory change and best practice to support this wider view.
How SEFE Energy can help
At SEFE Energy, we support organisations across the UK by helping them gain clearer visibility over energy use and energy purchasing. From understanding consumption data to navigating market volatility and choosing the right contract structure, our focus is on enabling informed, practical decision making.
Energy audits are often an effective starting point, providing the insight needed to reduce waste, manage costs and build a more resilient energy strategy in an increasingly complex market.