Carbon Accounting for Australian Universities: a practical guide to getting started

Ask a university for its emissions and you'll usually get a confident answer about climate science and often a less specific one about its own carbon footprint. What are our emissions, where do they come from, and can we stand behind the number when a student, auditor or another stakeholder asks? For a many of institutions, that's where things get tricky.

It needn't be. Carbon accounting is far more tangible than it looks once you treat it as what it actually is: accounting. This is a practical guide for Australian universities starting out, covering what the regulatory picture looks like, where the emissions actually sit, and the five things we'd focus on first.

Summary

Carbon data is increasingly being treated like financial data. For universities, that means moving away from the once-a-year consultant report and towards a proper, traceable emissions inventory that finance, facilities and sustainability teams all trust.

The pressure to do this is coming from several directions at once: students and staff expect it, state governments are tightening operational reporting requirements, and the Australian Sustainability Reporting Standards (ASRS) have set a new benchmark for what credible climate reporting looks like, even for organisations not yet legally required to follow them.

For most universities the footprint is dominated by Scope 3, with operational emissions (Scope 1 and 2) being smaller but easier to measure. The sensible starting point is to nail Scope 1 and 2, get a directional read on your Scope 3 hotspots, and build the muscle to improve from there. And because this is happening inside a teaching and research institution, there's a rare opportunity most organisations don't have: turn the work into curriculum and let students engage directly.

Why would a university report?

There's no single mandate that captures every Australian university, which is exactly why this question matters. Most public universities are established under state legislation rather than reporting under the Corporations Act, so the headline ASRS regime doesn't automatically apply to the core entity the way it does to large listed companies. But "not strictly mandatory yet" is a poor reason to wait. Here's what's actually driving institutions to act.

Stakeholder expectations. Prospective students compare institutions on sustainability. Research funders, international partners and ranking bodies ask for emissions data. Staff care, and increasingly so do alumni and donors. For an organisation whose brand rests on credibility and evidence, a vague or absent climate position is a liability. A defensible number, with the workings behind it, is an asset.

Incoming state government requirements. This is where the regulatory net is tightening fastest. In New South Wales, the Climate Change (Net Zero Future) Act 2023 underpins the Net Zero Government Operations Policy, which sets emissions-reduction and annual reporting expectations for general government sector agencies, and NSW Treasury's framework for climate-related financial disclosures is rolling out across government annual reporting entities. Victoria has long required public sector entities to disclose environmental data through Financial Reporting Direction 24 (FRD 24), sitting alongside the whole-of-Victorian-government emissions pledge. At the Commonwealth level, the Climate Disclosure initiative is phasing in AASB S2-aligned reporting for Commonwealth entities and companies. Whether a specific university is captured today depends on its jurisdiction and classification, but the direction of travel is unmistakable: operational emissions reporting for public institutions is becoming the norm, not the exception.

A desire to align with ASRS. Even where it isn't compulsory, ASRS (and AASB S2 within it) has quietly become the reference standard for what "good" looks like. Aligning early means that when an obligation does land, whether through a state framework, a controlled commercial subsidiary, or a funder requirement, you're not starting from zero. It also means your numbers are built on the same foundations auditors are already using elsewhere, which matters enormously when assurance enters the picture. ASRS reporting brings phased assurance requirements, starting with limited assurance over Scope 1 and 2, and data that wasn't built to be traced rarely survives that scrutiny.

The common thread: the institutions doing this well aren't treating it as compliance. They're building a capability they'll need regardless of which rule lands first.

Key emission sources: what a university footprint actually looks like

To make this concrete, it helps to look at a real profile. UNSW publishes a detailed environmental dataset, and it's a useful reference point because the shape of its footprint is typical of a large Australian university. The figures below are drawn from that published data (tCO₂e).

Scope 1 and 2 are the smaller, more measurable part of the story. In 2024, UNSW's combined Scope 1 and 2 emissions sat at roughly 73,000 tCO₂e. Within that, purchased electricity (Scope 2) does almost all of the heavy lifting, around 64,000 tCO₂e, while direct Scope 1 emissions were closer to 9,000 tCO₂e. A few sources within Scope 1 are distinctively university in nature:

• Natural gas and other fuels for heating, hot water and campus plant, the largest Scope 1 line.
• Refrigerant and laboratory gases, a reminder that research-intensive campuses carry emissions ordinary offices don't.
• Livestock emissions, which show up because of agricultural, veterinary and research operations.

Scope 3 dwarfs everything else. This is the headline finding and it holds across the sector. UNSW's total Scope 3 footprint was around 206,000 tCO2e, roughly three times its operational emissions. The big categories are:

• Purchased goods and services (Category 1), comfortably the largest at around 104,000 tCO₂e, covering everything from research consumables to IT to professional services.
• Capital goods (Category 2), reflecting the constant cycle of campus construction and major equipment.
• Investments (Category 15), which most organisations don't carry but universities do, given their endowments and investment portfolios.
• Business travel (Category 6), the academic conference-and-collaboration footprint. The data tells its own story here: travel emissions collapsed during the pandemic years and then rebounded sharply, a useful illustration of why year-on-year movements need explaining, not just reporting.
• Smaller but real contributors including upstream energy-related emissions, employee commuting, waste, and tenant energy.

The practical takeaway is simple. If you measured only Scope 1 and 2, you'd capture roughly a quarter of your real footprint and miss almost everything you can actually influence through procurement, investment and travel policy. That doesn't mean boiling the ocean on day one, but it is important to understand these emission sources in the context of your broader impact.

Top 5 tips for universities just getting started

1. Get the boundary right before you measure anything

The single most common early mistake is fuzzy boundaries. Universities are sprawling: multiple campuses, controlled entities, commercial subsidiaries, research institutes, student accommodation, joint ventures and offshore operations. Decide explicitly what's in and what's out, document why, and apply a consistent consolidation approach (operational control is the usual choice). A clear boundary is what lets you compare year to year, reconcile against your financials, and answer an auditor's first question without scrambling. Get this wrong and every number downstream inherits the ambiguity.

2. Choose emission factors deliberately, and look to your peers

You don't need to invent your methodology. For Australian operational emissions, the National Greenhouse Accounts (NGA) factors are the standard starting point, and the GHG Protocol governs the structure. For Scope 3, you'll lean on spend-based factors initially; many universities leverage the IELAB factors and the UK governments factors for activity data including flights. The smart move is to look at how comparable universities have approached their factor choices, because the sector has converged on broadly similar methods. Consistency with your peers makes your numbers comparable and your judgments easier to defend. Document every factor you use and why, you'll need that trail when assurance arrives.

3. Map what data the organisation already collects, department by department

Most of the data you need already exists somewhere, it's just scattered. Facilities holds energy and gas; finance holds the general ledger that underpins most of Scope 3; travel sits with the bookings system or expense claims; procurement holds supplier spend; HR holds headcount for commuting estimates. Before you buy anything or build anything, do the unglamorous work of mapping who collects what, in what format, and how reliable it is. This single exercise tells you where you can start immediately, where you'll need to estimate, and where there are genuine gaps to close over time.

4. Start with Scope 1 and 2, then get a read on your Scope 3 hotspots

Resist the urge to perfect Scope 3 before you've finished Scope 1 and 2. Operational emissions are more measurable, more controllable, and the obvious first deliverable for any state reporting requirement. Lock them down first. Then take a spend-based pass at Scope 3 using your general ledger, not to produce a flawless number, but to identify your hotspots, which for most universities will be purchased goods and services, capital goods, investments and travel. Knowing your hotspots tells you where deeper, supplier-specific data is worth chasing and where an estimate is good enough for now. This progressive approach is how you make Scope 3 manageable rather than paralysing.

5. Capture the learnings, and bring students in

Sustainability is becoming core to the curriculum, and there's no better case study than your own institution's emissions. Involving students in the carbon accounting work, whether through capstone projects, work-integrated learning, or research projects, does three things at once: it gives students applied experience employers are crying out for, it adds real capacity to a team that's usually stretched, and it embeds the learnings inside the institution rather than locking them in a consultant's report that walks out the door. Document your methodology, your assumptions and your judgment calls as you go. Treat the build as teachable material. The universities have a unique opportunity to get students involved that add value to the organisation and students.

Conclusion

Many universities are already be doing great things from a decarbonisation and sustainability perspective, but with the reporting landscape changing they are expanding the scope of their climate reporting as well as building capacity internally. Other universities are earlier on the journey but building up a robust and audit ready climate reporting process doesn’t need to be daunting. Start by understanding what requirements the university needs to meet, or will likely need to meet in the future. Look to peers for existing approaches and good practices and look at how you can leverage existing resources and data that is already being collected to get started.

A note on Sumday

We work with leading Australian universities, both through education partnerships and to help them streamline their own climate reporting. That combination is deliberate. Sumday was built by ex-auditors who believe carbon data should be held to the same standard as financial data: traceable to a source transaction, a methodology and an emission factor, and built to survive assurance.

For universities that's a natural fit. The platform starts with your financial data so Scope 3 is grounded in real spend rather than guesswork, brings suppliers into the workflow over time, and comes with built-in education through Sumday Academy, so the people doing the work (including your students) actually understand it.

If you're starting this journey, or trying to get your reporting onto firmer ground, we'd love to talk.