ACCU scheme at an inflection point: Assurance, early auditor engagement and emerging methods

The Australian Carbon Credit Unit (ACCU) scheme is entering a more mature phase. 

There is an increasing focus on integrity, transparency and long-term credibility, alongside continued growth. This reflects recent reforms and policy developments aimed at ensuring the scheme remains trusted and fit for purpose.

Discussions at the recent Carbon Market Institute forum in Fremantle reflected this evolving focus, with integrity and market confidence featuring prominently in how participants are thinking about the next phase of the market.  

At the same time, the method landscape is continuing to evolve. New methods have recently been introduced, others are being updated, and a number are under active development. The proposed Integrated Farm and Land Management (IFLM) method is a key example.

Together, these developments point to a clear direction of travel. Assurance is playing an increasingly central role in how credible and scalable carbon projects are designed and implemented.

Assurance is becoming central to carbon market confidence

The ACCU scheme has always relied on clearly defined methods, supported by monitoring, record keeping and reporting, as well as independent audit requirements. Scheduled audits are a core integrity mechanism, with most projects subject to at least three audits across their crediting period.

What is evolving is the level of scrutiny applied to these elements and the expectations associated with them.

Buyers, regulators and market participants are placing greater emphasis on the reliability and defensibility of carbon credits. Confidence is closely linked to the quality of evidence, the strength of governance and the robustness of underlying assumptions. This aligns with broader reforms to strengthen integrity, transparency and governance across the scheme.

At the same time, the evolution of methods is increasing complexity. New and updated methodologies are introducing broader system boundaries, more advanced models and greater reliance on integrated datasets.

In this environment, assurance plays a more prominent role. It is not only about confirming compliance at a point in time, but also about supporting confidence in how projects are designed, implemented and reported over their full lifecycle. 

A pipeline of new and evolving methods

The ACCU scheme is undergoing an active period of method development and reform.

Recent updates include the introduction of new savanna fire management methods in April 2026. These methods reflect updated scientific approaches and expand carbon accounting to include additional carbon pools, supported by tools such as the Savanna Carbon Accounting Model.

At the same time, existing methods are regularly reviewed, updated or replaced to ensure they remain aligned with current science and policy settings. This reflects the scheme’s ongoing commitment to continuous improvement and integrity.

There is also a broader pipeline of emerging methods and reforms. These include:

• new and updated livestock and agricultural methods
• land sector methods focused on regeneration and avoided emissions
• evolving approaches to soil carbon and baseline setting
• continued refinement of industrial and waste methodologies.

This activity reflects a deliberate shift towards methods that are more robust, more flexible and better aligned with real world practices. 

IFLM as a step change in method design

Within this broader context, the proposed Integrated Farm and Land Management (IFLM) method represents a significant development.

The draft IFLM method is designed as a framework approach, allowing multiple carbon activities to be undertaken on a single property and enabling additional activities and measurement approaches to be incorporated over time.

This approach has the potential to:

• support a more integrated, whole of property approach to carbon management
• better reflect how landholders operate in practice
• provide greater flexibility as projects evolve.

At the same time, it introduces increased complexity. Integrated approaches require stronger coordination, more sophisticated data management and clearer documentation of how different activities interact. 

What does IFLM and other methods mean for assurance?

As methods become more sophisticated, assurance requirements and expectations increase accordingly.

One key area is data integration. Projects are increasingly required to bring together multiple data sources across different activities. Ensuring that this information is consistent, traceable and well documented becomes critical to supporting audit outcomes.

Another is the increased role of judgement. New and evolving methods often rely on models, assumptions and interpretation. This places greater emphasis on transparency and consistency in how those judgements are applied.

There is also a growing emphasis on system level assurance. Rather than assessing individual activities in isolation, assurance increasingly involves understanding how different parts of a project interact and whether the overall system supports reliable outcomes.

These challenges are not limited to IFLM. They are also evident in other new and updated methods, including those in the savanna fire, waste and agricultural sectors. 

Why early auditor engagement matters more than ever

In a more complex method environment, timing becomes increasingly important.

Engaging auditors early in the project lifecycle can allow proponents to test their approach during project design rather than waiting until reporting stages. This can help identify potential gaps in monitoring, data collection and governance before they become embedded in project systems.

Where engagement is delayed, issues may only become apparent later, when remediation is more complex and potentially more costly. This can contribute to delays in reporting and credit issuance.

Early engagement can provide several advantages:

• supporting more robust project design
• reducing the likelihood of rework
• improving audit readiness
• strengthening confidence in discussions with buyers and stakeholders 

As methods become more integrated and more sophisticated, these benefits become increasingly relevant. 

Build trust into your carbon projects from the outset 

The ACCU scheme is evolving into a more mature and credibility focused market, supported by ongoing reforms aimed at strengthening integrity, transparency and market confidence.

At the same time, the method framework is expanding through new, updated and more integrated approaches. IFLM is a clear example of this shift, but it forms part of a broader pipeline that includes new savanna fire methods and continued method development across multiple sectors.

In this environment, assurance plays a central and increasingly strategic role. It underpins confidence in carbon credits and supports the integrity of the market. 

Build trust into your projects from the ground up, and you protect both the value of your carbon assets and the reputation that underpins them. In a market defined by confidence, that's the surest way to move forward. 

Projects that embed assurance early, invest in strong systems and adapt to the evolving method landscape will be better placed to manage risk, meet expectations and deliver long term value.