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Carbon Accounting Consultant vs Software: What Each Really Costs

3 min read · Published July 2026

A consultant finishes your reporting cycle and hands over a PDF and a folder of working files. That's the deliverable. Next year you pay again, roughly the same, because nothing they built carried over. The real question isn't consultant or software. It's whether you want to keep renting the method or own it.

Both have a place. The mistake is using one for the job the other does better. So here's the honest version, from someone who works alongside both.

What consultants charge in Australia

Nobody publishes a rate card. From what we see across engagements, independent specialists bill around $150–$250 an hour, mid-tier firms $200–$350, and Big 4 sustainability practices $250–$500. At those rates a mid-market entity doing NGER and ASRS work can spend tens of thousands on data collection and reporting in a single cycle, with ASRS disclosure preparation running higher again. Assurance is a separate firm and a separate fee. The following year lands in much the same place.

The part nobody says out loud

Most of a consulting engagement isn't strategy. It's someone opening two hundred utility bills, typing consumption into a spreadsheet, and multiplying by an emission factor. That spreadsheet was built for this one engagement, and it quietly breaks next year when a site is added or DCCEEW updates the NGA Factors. The calculations were valid. They just aren't repeatable without the consultant back on the phone.

That's the trap: you pay a specialist rate for data entry, and you pay it again every cycle. Software keeps the method in-house and repeatable — here's how that runs, step by step.

Consultant vs software, side by side

ConsultantSoftware
Cost shapePer-cycle engagement, tens of thousandsAnnual subscription
What you getA report and working filesA system you re-run
Next yearRe-engage from close to scratchA re-run, not a rebuild
Who holds the methodThe firmYour team
Best atOne-off judgement, complex callsOngoing data and calculation

Where a consultant is still worth it

Independent assurance is a requirement of the ASRS regime, so you'll engage an assurance provider regardless, and that's a good thing, not a cost to design out. And for genuinely hard judgement calls (a tricky organisational boundary, a first scenario analysis, a contested materiality decision), a specialist who knows NGER and the GHG Protocol earns the fee. Pay for judgement. Stop paying for data entry.

A consultant leaves you with a report. The next October, you're back on the phone and the meter starts running again.

Why the method has to stay in-house
Extraction and calculation
Reads your bills and invoices and applies the current NGA Factors — the hours that eat most of a consultant's fee.
Source-linked
Keeps every figure tied back to the document it came from.
A method you own
You re-run it each year, instead of commissioning a fresh PDF.
Specialist where it counts
The review stays with your team; you bring in a consultant for the independent assurance sign-off.

Own the method instead of renting it

Our AI Sustainability Analyst does the cyclical data work and leaves you a footprint you can re-run, with the source and factor behind every figure.

Book a Sustainability Check-up

Frequently asked questions

Is carbon accounting software cheaper than a consultant?+

Usually, over any horizon longer than one year. A consulting engagement is priced per cycle and repeats annually. Software is a subscription that builds a reusable method, so the second year is a re-run rather than a rebuild. The exception is genuine one-offs and assurance, where a specialist's judgement is worth the fee.

What does a carbon accounting consultant cost in Australia?+

Rates range from around $150/hr for independent specialists to $250–$500/hr for Big 4 sustainability practices. A mid-market engagement covering data collection through to a lodgement-ready report typically runs into the tens of thousands, and ASRS disclosure work sits higher again. Assurance is a separate fee on top.

Can I do carbon accounting in-house without either?+

You can, but it usually means someone on your team absorbing months of manual data entry each cycle. Software is the middle path: it takes on the extraction and calculation while keeping the method and the review inside your team.

Sources

Primary sources, current at publication. Figures such as emission factors and penalty units are revised periodically. Check the source for the latest.

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