Climate reporting starts at the meter

Australia's mandatory climate disclosure regime reaches mid-sized businesses for financial years beginning on or after 1 July 2027. The work that takes longest is not the report. It is having a defensible record of what each site consumed.

Australia now requires certain entities to publish a sustainability report alongside their financial report, prepared under the Australian Sustainability Reporting Standards. The climate standard is AASB S2, and it requires disclosure of governance, strategy, risk management, and metrics and targets, including scope 1, scope 2 and scope 3 greenhouse gas emissions¹.

Two things about that list are worth separating. Governance, strategy and risk management are written. Metrics are measured. The written half can be drafted in a quarter by people who know the business. The measured half depends on records that either exist for the reporting year or do not, and no amount of drafting recovers a year of meter data nobody kept.

It is being phased in by size. The largest entities went first, for annual periods beginning on or after 1 January 2025¹. Two further groups follow.

The corporate regulator administers it, and its guidance sets out who is caught, when, and what relief applies in the early years².

This post is not a compliance guide, and nobody should treat it as advice on their own obligation. It is about the one part of the work that belongs to the buildings rather than to the finance team, and that is where the delay usually is.

Relief exists in the early years, and it is narrower than it sounds. The concessions apply mostly to scope 3 and to forward-looking statements, which are the parts hardest to evidence at first. Scope 1 and scope 2 are in from the first period.

There is also a second route in that has nothing to do with revenue or headcount. An entity registered under the national greenhouse and energy reporting framework is caught on that basis alone². Large industrial sites and their corporate groups often are, without anyone in the property team being aware of it.

Three groups, three start dates, three sets of thresholds. An entity falls into a group by meeting at least two of three size tests, measured on a consolidated basis.

The tests are ordinary financial ones, and that is the trap. They are met by businesses that do not think of themselves as reporting entities: a family-held logistics operator, a manufacturer with a single large site, a property group holding a handful of assets.

The emphasised row is the one that changes the shape of this for most commercial property owners and mid-sized operators. A business at $50 million of revenue with 100 people is not a large corporate, and from a financial year beginning 1 July 2027 it may still be inside the regime.

One qualification belongs next to that. A Group 3 entity with no material climate-related risks or opportunities can disclose a statement to that effect rather than the full set of metrics². Reaching that conclusion still has to be defensible, and it is easier to defend with the data than without it.

Two practical consequences follow. The first reporting period starts before the first report is due, so the data has to be in place at the beginning of the year, not at the end of it. And a business that is close to two thresholds should plan as though it is in, because discovering the answer in arrears is the expensive version.

One more point about timing, because it is the one that turns a compliance date into an operational deadline. The obligation attaches to a financial year, and the metrics describe that whole year. A business that begins collecting data in month seven has six months of estimates in its first disclosure, and estimates are exactly what an assurance provider is paid to interrogate.

The practical reading of the table above is therefore not the report date. It is the date the meters have to be right by, which is twelve months earlier.

Of the three emissions scopes, scope 2 is the one a site operator can act on directly and evidence cleanly. It is purchased electricity, and the calculation is consumption multiplied by a published factor³.

Scope 1 for a typical commercial site is small: refrigerant losses, a diesel pump, a fleet. Scope 3 is large and slow, and the first-year relief acknowledges that. Scope 2 is where the numbers are both material and obtainable, which makes it the scope a first disclosure usually stands or falls on.

It is also the scope where a rooftop array shows up. Generation consumed on site is electricity not purchased, so it leaves the number. That mechanism has its own post: see "Self-consumption moves scope 2, export does not".

The reason this matters for a first disclosure is evidentiary rather than technical. An emissions figure has to be reproducible from source records by somebody who was not there. Bills, meter data, site lists and tenancy arrangements are those records.

Most organisations discover the gap in the same three places, and each one fails differently. A site paid for through outgoings has consumption the organisation is responsible for and no invoice in its own name. A site that changed hands mid-year has two part-periods that have to be split on a defensible basis rather than pro-rated by days. A meter serving several tenancies produces one reading for consumption that belongs to more than one party.

None of the three is hard to resolve. All three are hard to resolve in arrears, which is the entire argument for starting at the meter rather than at the document.

Before any calculation, the organisation needs a list of every point of supply it is responsible for, and the boundary decision for each one.

It is the foundation record, and every later figure is traceable back to it. Without it, a reduction cannot be distinguished from a site that quietly left the portfolio.

That list is harder to produce than it sounds. It has to survive a lease expiring, a site being sublet, a meter being reconfigured and a retailer contract being renegotiated, all inside the reporting year.

Step five is the one that quietly fails. A system commissioned without its own generation meter cannot evidence its self-consumption to an audit standard, and retrofitting the metering means going back into a live board.

Two of the steps above are worth a note. Setting the boundary is a single decision applied consistently, and the common failure is not choosing badly but choosing twice: operational control for the sites that flatter the number and equity share for the rest.

Requesting interval data is the step with the longest lead time and the least control, because it sits with the retailer rather than with the business. Lodge it early, ask for the full year at the finest resolution the meter records, and ask for it per national metering identifier rather than per account.

If the organisation intends to report a market-based figure alongside the location-based one, the instruments behind it have to be documented from the start of the period.

This is optional work. A reporter may disclose the location-based figure alone. The reason organisations take on the extra is that a market-based figure responds to procurement decisions the business has already made, and it would be strange to make them and not report them.

The Clean Energy Regulator publishes a guideline covering voluntary market-based scope 2 claims and the certificates they may rest on⁴. A retail product described as renewable is not automatically one of them.

The question to put to the retailer is narrow and answerable: what is surrendered on our behalf, how much of it, and against which consumption. Anything softer than that will not survive a review.

The same question applies to an existing rooftop system. Certificates created when it was installed were often assigned in exchange for the up-front discount, and where that happened the attribute went with them.

Where the answer comes back vague, the safe position is to report the location-based figure for that year and fix the contract before the next one. A claim withdrawn after publication costs more than a claim not made.

The mechanics of what a certificate does to a renewable claim sit in another post: see "Self-consumption moves scope 2, export does not".

There is a short list of work that has to happen inside the buildings, and none of it requires knowing the final shape of the report.

Nothing on it is specific to a reporting standard, which is the point. Every item is something a well-run site should be able to produce anyway, and the regime simply removes the option of not being able to.

Get a full year of interval data for every site and keep it. It costs nothing beyond the request, and it is the record everything else is reconciled against.

Fix the metering on any system that cannot report its own generation, and specify a generation meter in the scope of any system not yet built.

Reconcile the site register against the lease schedule, because the sites that are missed are the ones nobody in the organisation receives a bill for.

Then, and only then, look at what the consumption data says about the buildings. A year of interval data is the same input a solar and storage design runs on, which means the reporting work and the capital work are reading the same file.

That is the useful part of the timing. An obligation arriving in 2027 forces a business to measure its buildings properly in 2026, and measuring them properly is what makes the next capital decision defensible.