Carbon accounting software measures and tracks emissions: Scope 1, Scope 2 and increasingly Scope 3. ASRS compliance software is designed to produce Australia’s mandatory AASB S2 climate disclosures, which require emissions data plus governance, strategy, risk management, scenario analysis and an audit-ready evidence trail. Carbon accounting is a component of ASRS compliance, not a substitute for it. Most Australian entities filing under AASB S2 will need ASRS-specific tooling, either in addition to a carbon accounting platform or as a single platform that covers both.
Two things changed. First, ASRS went live. Group 1 entities have filed their first AASB S2 disclosures for FY25, Group 2 reports for the first time against FY26, and Group 3 follows from FY27. Second, many of those same entities already had a carbon accounting tool in place, usually purchased two to five years ago to measure emissions for a voluntary framework, a client RFP, or a corporate sustainability target.
The question finance leaders are now asking is the logical one: “we already have a carbon accounting tool, is that enough for ASRS?”
For most entities, the honest answer is no, but the nuance matters. Carbon accounting does the first-line emissions measurement that AASB S2 requires. What it does not do is the other 60 to 70% of the disclosure, or hold the evidence trail to the standard a Big 4 auditor expects on Day One. This article unpacks the difference.
Carbon accounting software, sometimes called carbon management software or GHG accounting software, is designed to measure, track and report greenhouse gas emissions. The strongest platforms cover:
Carbon accounting software answers the question “what are our emissions?” It was not built to answer “how do we disclose those emissions, along with our climate risk and strategy, in a way that complies with AASB S2 and survives an assurance engagement?”
ASRS compliance software is designed around the four AASB S2 disclosure pillars. Each pillar has its own workflow, evidence and output requirements:
Additionally the software can provide disclosure drafting functionality to help pull all of the above together into an assurance ready document.
Underneath all four pillars sits the evidence layer: documented methodology, versioned source files, reviewer sign-offs, control points, and an audit trail the auditor can walk through without a scavenger hunt.
ASRS compliance software is the category built around this end-to-end workflow. It includes emissions calculation, so there is overlap with carbon accounting, but it exists specifically to produce AASB S2-compliant output with the evidence trail the standard and assurers expect.
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A capability-by-capability look at where the two categories differ.
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Carbon accounting software is strong in rows 1 to 3. ASRS compliance software is native across all rows. The gap is not about emissions, it is about everything the standard asks for around them.
Both categories need to calculate and track emissions. Emission factors, activity data, Scope 3 categories and data quality tiers matter equally to both. If you have invested in a carbon accounting platform and the emissions data is clean, that work is not wasted, it is a prerequisite for ASRS compliance. In some cases an ASRS platform can ingest data from an existing carbon accounting tool, so the investment carries forward.
The parts of AASB S2 that carbon accounting platforms were not built for:
First-round AASB S2 disclosures from comparable Australian entities have run to 30 to 40 pages. The companies that got there with only a carbon accounting tool typically did it with consultants filling the gap, which is where the Treasury estimate of $750,000 to $1.6 million in ASRS preparation cost largely lands.
Three common setups:
For Australian entities already deep into ASRS preparation with setup 2, switching platforms mid-cycle is rarely the right call, stabilise Year One first. For entities still choosing, setup 3 is almost always the better economic and operational decision.
Trace is a climate reporting platform specialising in ISSB and AASB standards so you can reach compliance with one provider. This means emissions calculation, climate risk and scenario analysis, and AASB S2 disclosure production sit in a single workflow with one evidence trail.
Trace’s Minimum Viable Compliance (MVC) framework is designed for Year One reporters who need to file credibly without the 30 to 40 page disclosures some early filers have produced. Trace customer SEE Group targeted an 8 page Year One disclosure and reduced its climate risk assessment from 13 weeks to 2 weeks using Trace’s AI tooling. For Year Two and beyond, Trace’s Best Practice option adds modules as your program matures: deeper scenario analysis, expanded Scope 3, strengthened governance, assurance-grade evidence. That modular path directly supports ASRS’s expectation that disclosure quality advances over time.
Trace is ranked #1 for Usability (8.86) and Results (8.58) in G2’s ESG Reporting Index, ahead of Workiva on Usability (8.35).
For a full comparison of the platforms Australian CFOs and sustainability leaders are evaluating in 2026, see our companion guide: Best ASRS climate reporting software in Australia (2026).
No. Carbon accounting software measures and tracks emissions. ASRS compliance software is designed to produce AASB S2 disclosures, which require emissions plus governance, strategy, risk management, scenario analysis and an audit-ready evidence trail. Carbon accounting covers roughly 30% to 40% of the AASB S2 disclosure requirement.
Your existing carbon accounting tool likely covers Scope 1, 2 and some of Scope 3, which is a prerequisite for ASRS but not sufficient. Most Australian entities using a carbon-accounting-only platform for AASB S2 compliance fill the gap with external consultants, which is expensive. A single ASRS-native platform is usually a better total-cost and lower-audit-risk option.
At minimum: climate scenario analysis (including at least one 1.5°C-aligned scenario), physical and transition risk workflows, governance and strategy disclosure management, AASB S2 disclosure output, and an assurance-grade evidence trail. The four AASB S2 pillars (governance, strategy, risk management, metrics and targets) sit above emissions data, not around it.
Historically yes, and many Australian companies still combine a carbon accounting platform, a climate risk consultant and a disclosure platform. Modern ASRS-native platforms such as Trace combine all three in a single workflow, which lowers cost, reduces audit risk and removes the data reconciliation problem between tools.
Three quick tests. First, can you produce an AASB S2-structured disclosure directly from your platform, or does it need consultant work to assemble? Second, can you run climate scenario analysis in the same system, or is it outsourced? Third, can you walk an auditor from source data to disclosure in one evidence trail, or is it stitched from multiple tools? If the answer to any of these is no, you are likely relying on consulting to close the gap, and an ASRS-native platform will usually be cheaper and lower risk.
If your organisation is in ASRS scope and you are not yet confident your current tooling covers AASB S2, the useful next step is a 30 minute walkthrough of where the gap is likely to sit and how it closes.
Book an ASRS readiness walkthrough with the Trace team.
Trace is a climate reporting platform specialising in ISSB and AASB standards, helping businesses navigate mandatory climate disclosure with clarity and confidence.
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