Types of Carbon Offsets Available in Australia

Australian Carbon Credit Units (ACCUs)

ACCUs are the primary compliance-grade offset in Australia, issued under the Emissions Reduction Fund (ERF). Managed by the Clean Energy Regulator, ACCUs represent one tonne of CO₂e abatement from approved project types.

ACCU project types:

• Landfill gas: Capture methane from waste sites; highly credible and significant abatement
• Soil carbon: Agricultural land management to sequester carbon; growing but controversial due to permanence concerns
• Renewable energy: Solar, wind projects; lesser abatement than avoided fossil (since baseline is uncertain)
• Methane avoidance: Coal mine methane, wastewater treatment; high-quality projects
• Avoided deforestation: Protect forests from clearing; material abatement but subject to permanence and additionality questions

Advantages: Regulated by Clean Energy Regulator; Australian context; double-counted projects are digitally tracked.

Disadvantages: Some project types (especially soil carbon and avoided deforestation) face methodological scrutiny; prices vary (typically AUD $15–$25/tCO₂e); limited supply relative to offset demand.

International Voluntary Carbon Market Credits

Organisations also access international offsets via Verified Carbon Standard (VCS, now Verra) and Gold Standard, which cover global projects beyond Australia’s scope (renewable energy, forestry, methane).

Advantages: Broader range of projects; often lower cost (USD $5–$15/tCO₂e); immediate supply.

Disadvantages: No link to Australian emissions reductions policy; variable quality; higher greenwashing risk if not carefully selected.

Climate Active Offsets

Climate Active (DCCEEW) certifies carbon-neutral and net-zero claims. Organisations pursuing Climate Active certification must use ACCU or international Gold Standard/VCS offsets to substantiate claims; this provides institutional assurance.

Assessing Offset Integrity: Key Principles

Additionality

Is the abatement additional to what would have happened anyway? A renewable energy project in a country with abundant hydro power may not be additional (the country would have gone renewable anyway). A landfill gas capture project in a region without existing regulation is more likely additional.

Assessment: Review project methodology and baseline assumptions. Ask: would this project exist without carbon credit revenue?

Permanence

Will the carbon reduction last indefinitely, or is it reversible? Renewable energy projects are permanent (once built, they don’t emit). Soil carbon is reversible (ploughing releases sequestered carbon). Avoided deforestation depends on enforcement—if a forest is later cleared, abatement is negated.

Offset quality: Permanent > reversible. For reversible projects, look for long-term contracts or buffers (e.g., 20% of credits held in reserve to cover reversal risk).

Lack of Leakage

Does the project simply shift emissions elsewhere? Example: a avoided deforestation project that protects one forest but indirectly drives deforestation in another region (leakage).

Assessment: Strongest projects demonstrate no leakage or employ spatial boundaries to contain impacts.

Verified and Monitored

Are actual abatement verified by independent third parties? ACCUs require Clean Energy Regulator approval; VCS and Gold Standard require independent audit. Unverified or self-reported offsets are red flags.

No Double-Counting

Has the same tonne of abatement been credited twice? Example: a renewable energy project claims credit both through the ERF and international VCS (not possible in Australia’s centrally registered system, but possible internationally).

Assessment: Verify serial numbers; check registries (ACCU registry, Verra registry) for double-issuance.

Aligned to Social and Environmental Co-Benefits

The best offsets deliver climate impact AND co-benefits (biodiversity, community livelihoods, air quality). Avoid offsets with negative social impacts (e.g., avoided deforestation that excludes indigenous land rights).

Gold Standard offsets explicitly assess Sustainable Development Goal alignment; many ACCUs are associated with habitat restoration or renewable energy jobs.

Frameworks for Evaluating Offset Quality

Integrity Council for the Voluntary Carbon Market (IC-VCM)

IC-VCM, launched 2022, assesses the quality of voluntary carbon credits against five criteria:

• Emissions reductions are real: Verified and monitored
• Additional: Wouldn’t have happened without carbon revenue
• Permanent: Lasting benefits
• No leakage: Emissions not shifted elsewhere
• No double-counting: Tracked and retired appropriately

IC-VCM publishes an “approved list” of high-integrity credits. If considering international offsets, prioritise IC-VCM-approved projects.

Australian Carbon Credit Units Integrity Framework

The Clean Energy Regulator publishes an ACCU integrity framework, addressing concerns about soil carbon and avoided deforestation projects. It sets minimum standards for project design, monitoring, and permanence.

Best practice: prioritise ACCUs from projects that meet or exceed the integrity framework (landfill gas, methane avoidance, renewable energy).

Gold Standard and VCS Methodologies

Both Gold Standard and VCS publish detailed project methodologies assessing additionality, permanence and leakage. Review methodology before purchasing; some projects are more robust than others even within the same standard.

Building a Credible Offset Strategy

Offsets as a Last Resort

Best practice: direct emissions reduction must come first. Offsets should address only residual, hard-to-abate emissions (typically <10% of baseline for true net zero). This signals genuine climate commitment to investors and stakeholders.

Prioritise Permanent, Additive Projects

Within offset types, prioritise permanent (renewable energy, methane avoidance, landfill gas) over reversible (soil carbon, avoided deforestation) unless the latter employ robust permanence frameworks.

Local Australian Offsets Where Possible

ACCUs support Australian climate policy and demonstrate consistency with national emission reduction targets. International offsets are justified where Australian offsets are unavailable or cost-prohibitive; ensure international offsets meet IC-VCM standards.

Transparency and Verification

Publish your offset strategy in ESG reports: which project types, how many tonnes, cost per tonne, and verification standard. Avoid vague claims (“carbon-neutral through offsets”) without detail; investors and stakeholders expect specificity.

Engage a Reputable Broker

Carbon offset brokers (e.g., EcoActive, Indeigo, Climate Friendly) specialise in due diligence, sourcing and verification. Using a reputable broker reduces greenwashing risk and ensures offset quality. Brokers typically charge 10–20% markup on carbon cost.

Implement Retirement and Reconciliation

Once purchased, offsets must be “retired” (permanently removed from circulation) to prevent double-counting. ACCUs are retired in the Clean Energy Regulator registry; international credits are retired in Verra or Gold Standard registries. Document retirement serially to substantiate offset claims.

Common Offset Pitfalls

• Purchasing unverified offsets: Cheaper, but no assurance of quality; high greenwashing and ASIC enforcement risk
• Over-relying on reversible projects: Soil carbon and avoided deforestation are appropriate in a balanced portfolio but shouldn’t dominate; permanence is critical
• Using offsets to avoid reduction: If your offset strategy suggests you’re not reducing direct emissions, credibility suffers. Offsets must be supplementary
• Double-counting renewable energy: If you claim renewable energy reduces Scope 2, don’t also claim the associated renewable credits as offsets; choose one
• Ignoring co-benefits: Some offsets (particularly avoided deforestation without indigenous consent) create social risk; prioritise ethically sourced offsets

Offsets and Greenwashing Risk

ASIC explicitly warns against greenwashing through low-quality offsets. Offences include:

• Claiming carbon-neutral/net-zero status without verified offsets
• Using unverified or low-integrity offsets and presenting them as credible
• Using offsets to offset business-as-usual emissions and claiming climate progress
• Misleading about offset permanence or additionality

To protect against ASIC risk, use Climate Active certification (which mandates offset quality standards) or equivalent third-party assurance. Document your offset sourcing and due diligence transparently in ESG reports.

Frequently Asked Questions