If you've received a Scope 3 questionnaire from a major client, been asked for your "carbon footprint" in a tender response, or heard that AASB S2 is coming and wondered what it means for you, this guide is your starting point. No jargon. No assumption that you have a sustainability team. Just a clear explanation of what carbon accounting is, why it matters, and what regional Australian businesses actually need to do about it.
What is carbon accounting?
Carbon accounting is the process of measuring the greenhouse gas (GHG) emissions produced by your business, across your operations, energy use, vehicles, supply chain, and more. The result is typically expressed as tonnes of CO₂-equivalent (tCO₂e) and forms what's commonly called a "carbon footprint."
Done properly, carbon accounting gives you a documented, defensible number you can use in tenders, supplier questionnaires, annual reports, and regulatory filings. Done poorly, or not at all, it leaves you unable to answer increasingly standard questions from clients, government, and financiers.
Scope 1, 2, and 3: what they actually mean
Almost all carbon accounting frameworks (GHG Protocol Corporate Standard, ISO 14064, AASB S2) organise emissions into three "scopes":
- Scope 1, Direct emissions: Diesel you burn in your vehicles, plant, and generators. Gas used in your facility. Refrigerants that leak from your HVAC systems. If the combustion or release happens on your premises or in equipment you own or control, it's Scope 1.
- Scope 2, Purchased energy: The emissions associated with the electricity you buy from the grid. You don't burn it directly, but your electricity retailer does (through power stations) on your behalf.
- Scope 3, Value chain emissions: Everything else, the emissions your suppliers cause making the products you buy, the emissions from freight you don't own, business travel, employee commuting, and the emissions at end of life of your products. Scope 3 is broad, and most businesses don't need to measure all of it, but your clients may be asking you for specific Scope 3 categories.
Who needs carbon accounting in Australia, and why now?
The short answer: more businesses than most people realise. Here's what's driving it:
- Mining and resources supply chains: BHP, Rio Tinto, Glencore, South32, and Anglo American have all made commitments to reduce their Scope 3 (supply chain) emissions. That means they're asking their suppliers, including Brisbane-based contractors and regional Queensland operations, to provide carbon data. It's increasingly part of prequalification, not just good practice.
- Supermarket and retail supply chains: Coles and Woolworths are both applying carbon requirements to their supplier base. If your business supplies into retail food supply chains, including Queensland's sugar, beef, and horticulture sectors, you'll encounter these requirements.
- AASB S2 and mandatory disclosure: Australia's new climate disclosure standard is rolling out progressively. Large companies are already required to report; smaller businesses in their supply chains will face increasing indirect pressure as those large companies need to account for their Scope 3.
- Queensland Government procurement: Queensland's procurement policy has been updated to include carbon considerations for government contracts. Businesses tendering for government work in Brisbane, regional Queensland, or anywhere in the state need to be able to answer carbon questions.
💡 "Carbon accounting isn't a regulatory burden reserved for big companies. It's becoming a baseline capability for any regional Australian business that wants to stay competitive in a supply chain."
How carbon accounting actually works, step by step
The process for a typical regional SME looks like this:
- Define your boundary. What sites, vehicles, and activities are in scope? For a contractor operating from a Mackay depot with a fleet of six vehicles and two generators, the boundary is clear. For a Brisbane head office with regional worksites, it needs more thought.
- Gather your activity data. Litres of diesel, kWh of electricity, kilometres driven, tonnes of waste disposed. Most of this lives in your fuel invoices, electricity bills, and vehicle logbooks, data you already hold.
- Apply emission factors. Each activity (one litre of diesel, one kWh of grid electricity) has a corresponding emission factor that converts it to CO₂-equivalent. For Australian businesses, these come from the federal government's National Greenhouse Accounts (NGA) Factors, published annually.
- Calculate, document, and review. Multiply activity data by emission factors, total by scope, document your methodology and data sources, and have the result reviewed for reasonableness.
- Report and update annually. Your carbon footprint is a living document. Updated annually, it lets you track your trajectory and identify where your biggest opportunities for reduction sit.
What does carbon accounting cost for a small business?
This varies significantly with business complexity, but for most regional Queensland and Brisbane SMEs, a first-year carbon footprint is a lot more affordable than people expect. The cost is typically in the range of a few hundred to a few thousand dollars, depending on the number of sites, the complexity of your operations, and how much data preparation is needed. It's rarely the five-figure project that a large consultancy might quote for an ASX-listed client.
If your immediate need is tender-specific, you just need your Scope 1 and 2 numbers to answer a pre-qual question, our Tender-Ready Carbon Snapshot™ is designed for that. It gets you defensible data fast, without committing to a full inventory you might not need yet.
What to do once you have your carbon footprint
A carbon footprint number sitting in a spreadsheet isn't very useful on its own. The value comes from using it. Practically, that means:
- Using the data to respond to client questionnaires and tender requirements
- Identifying your largest emission sources and assessing which have the most cost-reduction potential
- Setting a baseline for future reduction planning
- Tracking progress year-on-year to demonstrate a credible improvement trajectory
We help businesses take that next step with Emission Reduction Planning, practical, costed recommendations for cutting emissions in ways that also reduce operating costs. From fuel efficiency improvements to electricity procurement, the overlap between carbon reduction and cost savings is usually larger than people expect.
Common Questions