Carbon footprint reporting sounds like one job. In practice most UK organisations end up doing it three or four times a year, in slightly different shapes, for slightly different audiences. SECR wants one version. A customer questionnaire wants another. A public sector tender wants a third. We see the same result repeatedly: numbers that do not reconcile, and nobody entirely sure which set is right.
Here is what is actually required, and how to stop doing the same work four times over.
Who has to do carbon footprint reporting in the UK
The main statutory requirement is Streamlined Energy and Carbon Reporting, or SECR. It sits in your annual report, and what you disclose depends on what kind of company you are.
Quoted companies report global Scope 1 and Scope 2 emissions, global energy use, at least one intensity ratio, and the energy efficiency measures taken during the year.
Large unquoted companies and LLPs report UK energy use, the associated Scope 1 and Scope 2 emissions, and the Scope 3 emissions from business travel in vehicles the company owns or hires. You are in scope if you meet at least two of three tests: 250 or more employees, turnover of £36 million or more, or a balance sheet total of £18 million or more.
There is a low energy user exemption. If you used 40 MWh or less across the reporting period, you can state that instead of reporting in full. In practice very few organisations of this size qualify.
What Scope 1, 2 and 3 mean for your numbers
Emissions are grouped using the GHG Protocol, which is the international standard almost every UK reporting framework points back to.
Scope 1 is what you burn directly. Gas for heating and process, fuel in vehicles you own or lease, on-site generation, and refrigerant losses.
Scope 2 is the energy you buy in. Electricity, and any purchased heat, steam or cooling.
Scope 3 is everything else across your value chain. Purchased goods and services, upstream and downstream transport, waste, employee commuting, business travel, and the use of products you sell.
Scope 3 is usually the largest part of a footprint and the part you control least directly. SECR only asks for a narrow slice of it. Customers, investors and tender panels ask for far more.
The requirements that catch organisations out
SECR is rarely the whole picture. Three other demands turn up regularly.
Public sector tenders. Bidding for central government contracts worth £5 million a year or more requires a published Carbon Reduction Plan under PPN 006, previously PPN 06/21. It commits you to net zero by 2050 and asks for more Scope 3 categories than SECR does. It is a different document in a different format, and it has to be public.
Customer questionnaires. Large buyers increasingly ask suppliers for emissions data, often with a product or contract level split that your statutory reporting was never built to produce.
European parents. If your UK business sits inside an EU group, you may be pulled into group level CSRD reporting on a timetable set by someone else.
Then there is ESOS, which is not carbon reporting at all, but runs on the same underlying energy data. If that data is already clean, ESOS gets considerably cheaper.
Why data quality decides everything
The framework is the easy part. Almost every difficult carbon footprint reporting project we pick up has the same root cause, and it is never the methodology.
It is estimated bills sitting in the dataset unflagged. It is a site nobody included because the landlord pays the electricity. It is fleet fuel recorded in litres in one system and pounds in another. It is a meter that changed supplier mid-year, so nine months of data exists and three months does not.
None of that is dramatic on its own. Together it is the difference between a number you can defend and a number you have to restate next year. Restating is the outcome worth avoiding. A slightly conservative baseline you can stand behind is far more useful than a precise one that moves.
Three things are worth settling before anyone calculates anything. Where your organisational boundary sits, including joint ventures and leased space. Which emission factor set and version you are using. And who owns each data source, by name, so chasing it is somebody’s job rather than nobody’s.
Getting carbon footprint reporting right
The organisations that find this straightforward treat it as one exercise with several outputs. Build the dataset once, properly, at a granularity that supports the most demanding request you face. SECR, a Carbon Reduction Plan, a customer questionnaire and your ESOS evidence then all draw from the same source, and they reconcile because they came from the same place.
We handle carbon footprint reporting from data collection through to the disclosure that goes in your annual report, so your finance and operations teams are not spending December chasing meter readings.
If you want a view on where your data actually stands before your next reporting cycle, start a conversation at www.gtconsulting.co.uk.