You might not report under AASB S2, but your customers will.
For most Australian small-to-medium enterprises (SMEs), the headlines about mandatory climate reporting feel like a problem for the “big end of town.” And technically, that’s true. The new Australian Sustainability Reporting Standards (ASRS), specifically AASB S2, initially apply to Australia’s largest corporations, those with over $500 million in revenue or $1 billion in assets.
But the reporting net widens quickly. By FY2028, mandatory reporting will extend to Group 3 entities, capturing businesses with as little as $50 million in revenue or $25 million in assets (or 100 employees). In other words, what starts at the top end of town is already moving decisively into the mid-market.
But if you think this exemption means you can ignore climate reporting, you are missing a critical shift in the Australian economy. While the regulatory burden stops at the top, the data burden is cascading rapidly down the supply chain.
The reality is that AASB S2 is not just a compliance standard for big business; it is a procurement standard for everyone else. For SMEs, the question is no longer “Do I have to report?” but rather “Do I want to keep my biggest clients?”
Just getting started or want to learn more about Climate Related Financial Disclosures? Check out our free AASB S2 reporting checklist.
The “Scope 3” Domino Effect
To understand why a small manufacturing firm or a mid-sized logistics provider is suddenly being asked for carbon data, you have to look at the fine print of the new standards.
Under AASB S2, large entities are required to report on their climate-related risks and opportunities. Crucially, this includes their greenhouse gas emissions across three categories:
- Scope 1: Direct emissions from sources they own (e.g., company vehicles, furnaces).
- Scope 2: Indirect emissions from the energy they buy (e.g., electricity).
- Scope 3: Indirect emissions from their entire value chain, upstream (suppliers) and downstream (customers).
This “Scope 3” requirement is the game-changer. For a large retailer like Coles or Woolworths, or a mining giant like BHP, their Scope 3 emissions are essentially your Scope 1 and 2 emissions.
When a major corporation needs to calculate its total carbon footprint to comply with federal law, they cannot simply guess. They need accurate data from the people who make their products, transport their goods, and provide their services.
This creates a domino effect. The regulator pressures the ASX100 company; the ASX100 company pressures its Tier 1 suppliers; and those suppliers pressure their sub-contractors. Suddenly, a family-owned transport business is receiving a 20-page questionnaire about fuel efficiency and carbon intensity from their biggest customer.
As noted by BDO Australia, reporting entities are now examining their entire value chain. If you are in that chain, your data is now their compliance necessity.
Reshaping Procurement: The New “Cost of Doing Business”
This shift is fundamentally reshaping how contracts are awarded. In the past, procurement decisions were driven by the “iron triangle” of price, quality, and speed. Today, a fourth dimension has been added: carbon transparency.
Large organisations are setting ambitious Net Zero targets, often aiming for 2030 or 2040. They cannot hit these targets if their suppliers are carbon-intensive black holes. Consequently, procurement teams are rewriting tender documents to include mandatory sustainability criteria.
We are already seeing contracts that require suppliers to:
1. Provide product-level carbon footprint data.
2. Commit to annual emissions reductions.
3. Demonstrate a roadmap to Net Zero.
If you cannot provide this data, you are becoming a liability. A supplier that can offer a product and the associated carbon data is infinitely more valuable than a cheaper competitor who cannot. The “cheaper” option now comes with a hidden cost: the administrative burden and compliance risk of estimating missing data.
For SMEs, this means that carbon accounting is no longer a “nice-to-have” ESG initiative, it is a core function of sales and business development.
The Rise of the “ASRS-Ready” Supplier
This pressure creates a distinct divide in the SME market. On one side are businesses that view these requests as administrative red tape, delaying their responses and providing poor-quality estimates. On the other side are the “ASRS-Ready” suppliers getting in line with AASB S2.
An ASRS-Ready supplier is an SME that has proactively prepared for the new regime. They haven’t just calculated their carbon footprint; they have integrated it into their value proposition.
These businesses treat carbon data like financial data. They have:
- Established a Baseline: They know their Scope 1 and 2 emissions for the last financial year.
- Digitised Data Collection: Instead of scrambling for fuel receipts at tax time, they use software or specialist consultants to track energy usage in real-time.
- Prepared Standard Responses: They have a “sustainability pack” ready for tenders, including their emissions data, reduction targets, and relevant certifications.
This proactive approach turns a compliance burden into a competitive advantage. When a major client asks for data, the ASRS-Ready supplier responds immediately with high-confidence figures. This makes the client’s life easier, reducing their own compliance costs and risk.
In a competitive tender, being the “low-friction” option for climate reporting can be the tie-breaker that wins a multi-year contract.
Why Early Adopters Will Win Long-Term
The rollout of AASB S2 is phased. Group 1 entities (the largest companies) start reporting for financial years commencing on or after 1 January 2025. Group 2 follows in July 2026, and Group 3 in 2027.
However, the smart money is moving now. The “Scope 3 relief” period, which gives large entities an extra year before they must disclose Scope 3 emissions, is a grace period for them, not for you. They are using this time to set up their data systems and audit their supply chains.
SMEs that prepare now are positioning themselves as long-term partners. By the time the mandatory reporting requirements fully bite in 2026 and 2027, large corporates will have likely rationalised their supply chains, dropping vendors who are too difficult to manage from a carbon perspective.
Furthermore, banks and insurers are also subject to these rules. They need to calculate their “financed emissions” ie, the carbon footprint of the businesses they lend to and insure. An SME with clear climate data may soon find it easier to access capital or secure lower insurance premiums compared to a high-risk, opaque competitor.
Practical Steps for SMEs
You don’t need to hire a Chief Sustainability Officer to get started on AASB S1 or AASB S2 aligned reporting. The goal is transparency, not perfection.
1. Start with Energy & Fuel: These are your Scope 1 and 2 emissions. Look at your electricity bills, gas usage, and fleet fuel consumption.
2. Engage Your Key Customers: Don’t wait for the questionnaire. Ask your biggest clients what data they will need and in what format. They will appreciate the initiative.
3. Look at Your Own Supply Chain: You likely have significant emissions embedded in the materials you buy. Start asking your own suppliers the same questions you are being asked.
4. Keep it Simple: Avoid “greenwashing” or making grand claims you can’t back up. Accurate data on where you stand today is worth more than a vague promise about 2050.
How NettZero Supports ASRS-Ready Businesses
For many SMEs, the challenge isn’t willingness, it’s knowing where to start, what matters, and what level of detail is “good enough” for customers reporting under AASB S2. That’s where NettZero comes in.
We work with Australian businesses across mining services, manufacturing, property, professional services and logistics to build practical, audit-ready climate foundations without unnecessary complexity.
Our services include:
Emissions Assessment (Scope 1, 2 & relevant Scope 3)
We help businesses calculate defensible emissions baselines aligned with the GHG Protocol and AASB S2 expectations, focused on the data your customers actually need.
Double Materiality Assessments (ASRS-aligned)
Identify which climate risks, opportunities and value-chain impacts are genuinely material, helping you prioritise effort and avoid over-reporting.
Life Cycle Assessment (LCA)
For product-based businesses, we quantify emissions at the product or service level supporting tenders, client disclosures and low-carbon procurement requirements.
Carbon Offset Credits (ACCUs & VCUs)
Where reductions aren’t yet feasible, we source high-integrity offset credits to support credible interim claims without over-promising or greenwashing risk.
Sustainability & Climate Communications
We help translate technical data into clear, compliant messaging for tenders, clients, websites and investor materials aligned with ACCC guidance and emerging ASRS scrutiny.
The goal isn’t to turn SMEs into reporting entities overnight. It’s to make them low-friction, high-confidence suppliers in a market where climate data is fast becoming part of the cost of doing business.
Conclusion
AASB S2 is a signal that the Australian economy is changing gears. While the legislation targets the top end of town, the momentum carries through the entire market.
For SMEs, the choice is clear. You can wait until you are forced to comply, scrambling to answer complex questionnaires to save a contract. Or, you can embrace the shift, become an ASRS-Ready supplier, and use your climate data to win business in a low-carbon future.
The businesses that thrive in the next decade won’t just be the ones with the best products, they’ll be the ones with the best data.