Carbon Footprint for Australian Small Businesses: A Practical 2026 Guide
Why Australian Businesses Are Now Receiving Carbon Questionnaires
Carbon footprint reporting for Australian small businesses has shifted from optional to urgent in 2026. Two drivers are accelerating this:
1. Australian Sustainability Reporting Standards (ASRS) — Under AASB S2 (aligned with IFRS S2), large Australian entities listed on the ASX must disclose climate-related risks and Scope 1, 2, and 3 emissions from financial year 2025–26. This directly creates supply chain data requests that flow to SME suppliers.
2. Global supply chain pressure — Australian companies supplying US, UK, and EU enterprises are receiving carbon questionnaires driven by CSRD, SEC climate rules, and SECR — regardless of Australian domestic regulation.
If your Australian business supplies goods or services to a large corporation — domestic or international — you should expect a carbon data request within the next 12 months.
Australian Emission Factors: Which Numbers to Use
Australia uses emission factors published by the Department of Climate Change, Energy, the Environment and Water (DCCEEW) in the National Greenhouse Accounts (NGA) Factors. The most recent version for reporting should be checked at dcceew.gov.au, but key 2023–24 factors include:
| Source | NGA Factor | Unit |
|---|---|---|
| NSW grid electricity | 0.73 | kgCO2e per kWh |
| VIC grid electricity | 1.02 | kgCO2e per kWh |
| QLD grid electricity | 0.82 | kgCO2e per kWh |
| SA grid electricity | 0.37 | kgCO2e per kWh |
| WA grid electricity (SWIS) | 0.69 | kgCO2e per kWh |
| Natural gas (AUS average) | 2.23 | kgCO2e per m³ |
| Diesel (road) | 2.71 | kgCO2e per litre |
| Petrol (unleaded) | 2.29 | kgCO2e per litre |
| LPG (auto) | 1.60 | kgCO2e per litre |
Important: Australian electricity emission factors vary significantly by state. Victoria's grid (coal-heavy) is approximately 2.8× more carbon-intensive than South Australia's (solar and wind). Always use your state-specific factor.
Worked Example: Australian SME Carbon Calculation
Sample company: A 25-person Melbourne-based manufacturing business
Scope 1 — Natural gas: 45,000 m³ × 2.23 = 100,350 kgCO2e = 100.4 tCO2e
Scope 2 — VIC electricity: 120,000 kWh × 1.02 = 122,400 kgCO2e = 122.4 tCO2e
Scope 3 — Waste: 15 tonnes general waste (landfill) × 467 kgCO2e/tonne = 7.0 tCO2e
Scope 3 — Business travel: 3 return flights Sydney–Melbourne (economy) = 0.24 tCO2e per flight × 3 = 0.7 tCO2e
Scope 3 — Commuting: 25 employees × 12 km average × 220 working days × 0.170 kgCO2e/km = 11.2 tCO2e
Total: 241.7 tCO2e | Per employee: 9.7 tCO2e/FTE
What Australian Questionnaires Actually Ask
Australian procurement carbon questionnaires — whether domestic or international — typically ask for:
- Scope 1, 2, and 3 totals in tCO2e for the most recent complete financial year (July–June)
- Emissions intensity per employee or per AUD million revenue
- The emission factors and methodology used
- Whether data has been third-party verified
For Australian companies reporting to international clients, the GHG Protocol Corporate Standard is the correct methodology regardless of which emission factors you apply.
How DeCarbonOPS Supports Australian Businesses
DeCarbonOPS applies DEFRA 2023 emission factors by default (used for UK and EU questionnaires). For Australian businesses responding to domestic procurement, use your state-specific NGA electricity factor and enter your Scope 2 figure directly in kWh — the platform converts to tCO2e. The resulting Carbon Passport verification URL is accepted by Australian, US, UK, and EU procurement portals.
Your first annual Carbon Passport report is free — no consultant required.
Frequently Asked Questions
Do Australian small businesses have to report carbon emissions?
Most Australian SMEs are not directly required to report carbon emissions under current legislation. However, the Australian Sustainability Reporting Standards (AASB S2) require large ASX-listed entities to report Scope 1, 2, and 3 from financial year 2025–26, creating supply chain data requests that flow to SME suppliers. Australian businesses supplying US, UK, or EU companies also receive carbon questionnaires driven by international regulations.
What emission factors do Australian businesses use for carbon reporting?
Australian businesses use the National Greenhouse Accounts (NGA) Factors published by DCCEEW. Key 2023–24 electricity factors: NSW 0.73, VIC 1.02, QLD 0.82, SA 0.37, WA 0.69 (all kgCO2e per kWh). Natural gas: 2.23 kgCO2e per m³. Diesel: 2.71 kgCO2e per litre. Always use your specific state grid factor for Scope 2.
What is AASB S2 and how does it affect Australian SME suppliers?
AASB S2 is Australia's climate-related financial disclosure standard, aligned with IFRS S2. It requires large ASX-listed entities to disclose climate risks and Scope 1, 2, and 3 emissions from 2025–26. This directly creates supply chain carbon data requests that flow to their SME suppliers — even those not directly subject to the standard.
Why does the electricity emission factor vary so much between Australian states?
Australian state electricity grids have very different generation mixes. Victoria and Queensland rely heavily on coal, giving them emission factors above 0.80 kgCO2e per kWh. South Australia and Tasmania have high proportions of wind, solar, and hydro, giving factors below 0.40. Queensland is at 0.82 and Victoria at 1.02. Using the national average instead of your state factor will give inaccurate results.
How long does it take an Australian business to generate a Carbon Passport?
With utility bills and travel records to hand, 15–25 minutes using DeCarbonOPS. Enter your electricity consumption in kWh, gas in m³, diesel and petrol in litres, and estimates for business travel and waste. The platform calculates your Scope 1, 2, and 3 totals and generates a permanent verification URL accepted by Australian, US, EU, and UK procurement portals.
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