Why Measuring Your Footprint Is the Only Real Starting Point
It is tempting to jump straight to action. Switch to renewable energy. Cut business travel. Buy some carbon offsets. And while all of those things may be relevant, doing them before you understand your actual footprint means you are guessing.
Measurement is not a bureaucratic exercise. It is the most practical thing you can do, because it tells you where your emissions actually come from, which isn’t always where most people assume.
Without a baseline, you can’t set a credible target. You can’t track progress, make claims to customers or investors or prioritise the actions that will make the biggest difference.
Everything starts here.
What Is a Carbon Footprint?
Your business carbon footprint is the total volume of greenhouse gas emissions generated by your operations, expressed in tonnes of carbon dioxide equivalent (tCO2e).
The “equivalent” part matters. Carbon dioxide is the most well known greenhouse gas, but businesses also produce methane, nitrous oxide, and others. These are all converted into a single CO2e figure using their global warming potential, so you are working with one comparable number.
Your footprint is divided into three categories, called Scopes.
Understanding the Three Scopes
Scope 1: Direct Emissions
These are emissions from sources your business owns or controls directly. Company vehicles. Gas boilers or heating systems. Any fuel burned on-site. If your business generates it directly, it is Scope 1.
For many SMEs, Scope 1 can be the smallest category, but it is the most straightforward to measure and the most immediate to address.
Scope 2: Indirect Emissions from Purchased Energy
This covers the emissions associated with the electricity, heat, or steam your business buys. Even though you are not burning the fuel yourself, the power station or grid supplying your energy is. Those emissions are attributed to your business.
The good news is that switching to a renewable energy tariff can significantly reduce your Scope 2 footprint, often more quickly and affordably than SMEs expect.
Scope 3: All Other Indirect Emissions
This is where things get more complex, and more important. Scope 3 covers everything else in your value chain: the goods and services you purchase, business travel, employee commuting, the use and disposal of your products, and much more.
For most businesses, Scope 3 accounts for the largest share of their total footprint, often 60 to 90 per cent. This is where the biggest reduction opportunities tend to live, and also where the biggest credibility risks sit if you choose to ignore it.
You don’t have to tackle Scope 3 in depth on day one. But understanding that it exists and knowing roughly where your biggest indirect emissions come from is essential to doing this properly.
What Data Do You Actually Need?
The good news is that measuring your footprint does not require a science degree. It requires a systematic approach to gathering the right data from across your business.
Here is what to start collecting:
Energy use Utility bills covering your electricity, gas, and any other fuel use. Twelve months of data is ideal for your baseline year. If you have multiple sites, you need data for all of them.
Business travel Mileage logs, flight records, hire car use, and any other work related travel. Rail travel data can usually be estimated from spend if detailed records are not available.
Company vehicles Fuel receipts or mileage records for any vehicles your business owns or leases.
Purchased goods and services This is the starting point for Scope 3. At minimum, you want to understand your main spending categories. Spend based estimation methods can be used as a starting point before you have supplier level data.
Waste How much waste does your business generate and how is it disposed of? Landfill generates more emissions than recycling or composting.
Water Water supply and treatment carries a carbon cost. Meter readings or utility bills will give you what you need.
How Emissions Are Calculated
Once you have your activity data, those figures are multiplied by emissions factors to calculate your CO₂e total. Emissions factors are conversion figures published by recognised sources, including the UK Government GHG Conversion Factors for Company Reporting, issued annually by the Department for Energy Security and Net Zero (DESNZ). These factors show, for example, how many kilograms of CO₂e are associated with each unit of energy, fuel, travel, waste or other activity, including electricity consumed from the UK grid.
You don’t need to know these figures off the top of your head. A good carbon management platform or consultant will apply the correct, up-to-date factors to your data. What matters is that you understand the principle: activity data multiplied by emissions factors equals your carbon footprint.
Common Mistakes to Avoid at This Stage
Measuring only what is easy. It is tempting to measure Scope 1 and 2 and call it done. This may underrepresent your true footprint significantly. At minimum, acknowledge and estimate your major Scope 3 categories as credibly as possible.
Using out-of-date emissions factors. Emissions factors change each year. Using an old factor will produce an inaccurate result.
Measuring once and never again. Your baseline is only useful if you repeat the process each year and track your progress over time.
Guessing instead of measuring. Estimates based on assumptions rather than actual data will undermine the credibility of your footprint and limit your ability to make meaningful decisions from it.
Leaving Scope 3 entirely out of scope. Investors, procurement teams, and customers are increasingly asking about Scope 3. Ignoring it does not make it go away. It just means you will need to address it later, under more scrutiny.
The Business Case for Measuring Now
Understanding your footprint is not just a sustainability exercise. It is a commercial one.
Businesses that have a measured, verified footprint are better placed to win contracts from buyers requiring supply chain sustainability data. They can make compliant environmental claims under the Green Claims Code. They can identify energy and resource inefficiencies that are costing them money. And they have the foundation to demonstrate genuine progress to investors, lenders, and customers who are increasingly demanding it.
The businesses that measure now will be ahead of those that measure under compulsion later.
The Business Case for Measuring Now
Understanding your footprint is not just a sustainability exercise. It is a commercial one.
Businesses that have a measured, verified footprint are better placed to win contracts from buyers requiring supply chain sustainability data. They can make compliant environmental claims under the Green Claims Code. They can identify energy and resource inefficiencies that are costing them money. And they have the foundation to demonstrate genuine progress to investors, lenders, and customers who are increasingly demanding it.
The businesses that measure now will be ahead of those that measure under compulsion later.
Your Action Checklist for Part 1
Before moving on to Part 2, work through these steps:
- Gather 12 months of energy bills for all business sites.
- Compile business travel records including mileage, flights, and public transport.
- Pull together fuel receipts or mileage logs for company vehicles.
- List your main categories of purchased goods and services by spend.
- Check your waste disposal contracts and volumes where available.
- Identify who in your business will be responsible for gathering and maintaining this data going forward.
- Choose whether you will use a carbon management platform, work with a specialist, or both.
You don’t need everything to be perfect before you begin. A good faith effort to gather real data is far more valuable than waiting until you have complete information.
What Is Coming Next
In Part 2 of the SME Net Zero Series, we look at how to turn your footprint data into meaningful targets. The difference between a credible net zero commitment and one that doesn’t withstand scrutiny often comes down to how targets are set. We will explain what science based targets are, what net zero actually requires, and how to set milestones that are ambitious and achievable for a business of your size.
NCZ makes carbon measurement straightforward for SMEs. Our platform guides you through the data collection process, applies the correct emissions factors, and produces an independently verified footprint report that you can use with confidence. Start with our FREE Carbon Calculator or speak to our team to find out how we can support your measurement from day one.