Spreadsheets Create Significant Audit Risk for ASRS Reporting

As Australia’s mandatory climate disclosure regime comes into effect, Group 1 reporters are under pressure to produce audit-ready, defensible emissions data.

For many organisations, that data still lives in spreadsheets, and that is becoming a serious problem.

Feedback from experienced disclosure auditors shows that spreadsheets introduce material risk, rework, and inefficiencies throughout the reporting process. Under ASRS and the Corporations Act, where data integrity, record keeping, and assurance are now legal requirements, those risks quickly become liabilities.

Here’s why spreadsheets fall short and why a dedicated emissions platform is now essential.

The Problem with Spreadsheets

Spreadsheets are built for numbers, not for assurance. Most are created by non-specialists and patched together over time, which makes them fragile and inconsistent.

A single broken formula, a hard-coded value, or an outdated emission factor can ripple through an entire dataset without anyone noticing. There is rarely a clear audit trail, and internal QA becomes a manual, time-consuming exercise.

Even simple updates such as refreshing emission factors or recalculating a base year can cause chaos when multiple versions of the same file are scattered across folders and inboxes. Auditors then have to check every formula, every time, because there is no way to know what changed or who changed it.

When "Good Enough" Becomes High Risk

Spreadsheets may have been tolerated in the past because they were convenient and familiar. Under ASRS, convenience no longer cuts it.

Entities reporting under the new regime must:

Submit an annual sustainability report to ASIC, subject to the full liability framework of the Corporations Act, including provisions on misleading or deceptive conduct.
Undergo external assurance that requires traceable, high-quality, auditable data.
Retain sustainability records for seven years (from 2025), ensuring they remain accurate and retrievable for compliance or regulatory review.

These obligations make manual spreadsheet systems high risk and potentially non-compliant. A missing formula or inconsistent data source could expose an organisation to audit findings, reputational damage, or even a breach of disclosure requirements.

Why It’s Time to Move Beyond Excel

Dedicated GHG accounting platforms remove these risks by design. They maintain secure, structured records that are automatically versioned and auditable. Every calculation, factor, and update is preserved, creating a single source of truth that both teams and auditors can trust.

Data integrity improves because emission factors are centralised and updated automatically. Calculation logic is standardised, so errors do not creep in unnoticed. Consistency across reporting years becomes effortless, and base-year recalculations take hours instead of weeks.

There is significant time saved and reduced effort from internal teams when using a platform compared to spreadsheets. A platform makes it quicker and easier to load data and automates the validation checks, essentially making measurement quicker and easier, reducing internal resource time/costs

An emissions platform makes it far easier to expand scope 3 boundaries, bringing supplier data into view, and keep methodologies consistent across the entire value chain.

And while spreadsheets may look cheaper upfront, they often create higher audit fees, consultant costs, and internal rework. A platform pays for itself in time, confidence, and compliance.

Where to from here?

Excel or Google Worksheets will always have a place for quick calculations, but they are no longer fit for purpose in an assurance environment. The new disclosure standards require data systems that are accurate, traceable, and built to withstand audit scrutiny.

A purpose-built emissions platform gives you that foundation. It keeps your data secure, your auditors confident, and your organisation ready for whatever ASRS requires next.