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Reliability of the small super funds income tax gap estimate

How we make sure the small super funds income tax gap estimate is reliable.

Published 3 November 2025

We seek feedback and advice about how we estimate the gap from our external and internal subject matter experts. Based on the advice, the reliability for this estimate is medium with a score of 16.

Our gap estimate remains highly sensitive to the changes in lodgement trends and the results of our compliance activities. In addition, this year’s gap estimates maintain the current approach to debt. For future publication cycles, we will implement a different approach to estimating debt. The use of the existing random enquiry program results in future years will likely lead to a reduction in reliability.

Figure 4: Reliability rating scale from very low to very high – small super funds income tax gap

The reliability rating of medium for the current small super fund tax gap estimate. The rating scale includes very low (1-10), low (11-15), medium (16-20), high (21-25), very high (26-30). The latest gap estimates have a rating of 16 which is medium. 

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