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What you will do: write the sentence you will say when someone asks, and prepare for the questions that follow it. A number on its own cannot be interpreted, defended, or compared. A number with its boundary attached can be all three.

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Never share the figure alone

“We emitted 1,240 tonnes” invites the immediate question of what that covers, and if you cannot answer instantly the number loses credibility whether or not it was right. Say it like this:
Our footprint for the 2025 financial year was 1,240 tonnes CO2e. That covers Example Pty Ltd and all operations under its control in Australia, across Scope 1, 2, and material Scope 3 categories. Electricity, fuel, and business travel are on measured data. Purchased goods and services is estimated from spend.
Four sentences. Total, boundary, period, and the honest state of your data. It answers the follow-up questions before they are asked, which is what makes it hold up.

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The four questions you will get

“Is that good?” There is no benchmark that makes this answerable, and you should say so. What you can offer is the shape: which categories dominate and what you intend to do about the largest. Direction is more meaningful than the absolute figure. “How accurate is it?” Answer by category rather than overall. Measured for your top three, estimated for the long tail, all of it documented. This is a stronger answer than a false claim of uniform precision. “Has it been verified?” If it has not, say so plainly. There is a real difference between a footprint that is auditable and one that has been audited, and claiming the second when you have the first is the fastest way to lose trust. “Why is it different from last year?” Only relevant from year two, and the answer is usually a boundary or method change rather than a real reduction. Which is why you documented both.

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Where to be careful

Marketing language is where good footprints get into trouble. “Carbon neutral”, “net zero”, and “climate positive” are claims with specific meanings and, increasingly, regulators who check them. Reporting a measured footprint is a statement of fact. Attaching a label to it is a claim, and the claim needs to be supported separately. If you are not certain a label applies, report the number and leave the label off.

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Save what you will need next year

Before you close this out, put four things somewhere permanent:
  • The boundary statement from lesson 2
  • Every estimate, with its method and why the real figure was unavailable
  • The list of sources that were hard to get
  • What you would do differently
That last list is worth more than it looks. It becomes next year’s procurement brief, the data to write into supplier contracts, and the reports to request annually rather than chase retrospectively.

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You are done when

  • You can state your footprint with its boundary, period, and data quality in four sentences
  • You know which questions you can answer and which you will decline
  • Your boundary, estimates, and difficult sources are saved for next year

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You have finished

You have a complete organisation footprint with a stated boundary, real data where it matters, documented estimates elsewhere, and a defensible way to talk about it. Year two is substantially easier, and not because you get better at it. It is easier because you know which categories matter, who holds each source, and the awkward requests have been made once already.

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Where to go next