ATO Corporate Tax Transparency: Section 3C TAA 1953 and the $100 Million Threshold
Under section 3C of TAA 1953 the ATO publishes total income, taxable income and tax payable for corporate tax entities with $100M+ total income (public and foreign-owned), $200M+ private companies, plus PRRT payers.
Statutory basis
The Corporate Tax Transparency Report (CTTR) is mandated by section 3C of the Taxation Administration Act 1953. This legislative basis requires specific corporate tax entities to publicly disclose information. The reporting obligations are designed to increase transparency regarding corporate tax affairs.
The reporting requirements apply to public and foreign-owned corporate tax entities with total income of A$100 million or more. Australian-owned resident private companies are subject to reporting where their total income exceeds A$200 million. Entities paying petroleum resource rent tax (PRRT) are also required to report, regardless of their total income. Part IVA ITAA 1936 general anti-avoidance considerations may also apply.
Finally, all significant global entities (SGEs) are captured under expanded reporting rules, as defined by the legislation.
What is published
The annual Corporate Tax Transparency (CTTR) report details specific financial information for each in-scope entity. This includes the entity’s Australian Business Number (ABN), name, total income, taxable income, and income tax payable. For entities that are Petroleum Resource Rent (PRRT) payers, the report also discloses the PRRT payable. Public country-by-country reporting in Australia provides further detail on related reporting.
It is important to note that ‘total income’ refers to the figure recorded on the company tax return, and is not equivalent to accounting revenue. This distinction means that businesses with significant cost-of-goods-sold may display a high total income figure alongside a comparatively low taxable income.
The ATO publishes commentary alongside the data to provide context and explain common reasons for entities reporting nil income tax payable. These reasons may include carried-forward losses, research and development (R&D) offsets, or exempt income. Reports are generally released approximately two years after the end of the relevant income year.
Interaction with other transparency measures
The Corporate Tax Transparency (CTTR) regime operates alongside other Australian tax transparency measures. Notably, it runs concurrently with the public Country-by-Country reporting regime, commencing 1 July 2024. However, unlike CbC reporting, the CTTR focuses solely on disclosing single-jurisdiction Australian figures.
Disclosures within the CTTR relating to tax paid may not align with the accounting tax-expense figures presented in audited accounts. This difference can arise due to timing variations and the application of offsets. Furthermore, entities that are signatories to the Voluntary tax transparency code (TTC) will publish a complementary narrative tax report, providing additional context. Thin capitalisation 2024 reform: earnings-based test
Certain ATO activities also interact with the CTTR. Assurance reviews conducted as part of the ‘Top 1000’ program inform the ATO’s oversight but are not directly incorporated into the CTTR reporting requirements. Similarly, data related to Petroleum Resource Rent (PRRT) complements separate PRRT instalment lodgement schedules.
Implications for in-scope entities
Entities falling within the scope of Section 3C of the *Tax Administration Act* 1953, due to having a total consolidated operating revenue of either $100 million (for public and foreign entities) or $200 million (for Australian private entities), should be aware of potential implications. Listing on the Corporate Tax Transparency (CTTR) register, even when tax payable is low or nil, can attract scrutiny from media and other stakeholders.
To mitigate potential reputational risk, entities should proactively prepare a clear, plain-English explanation for any nil-tax outcomes. These explanations should address factors such as tax losses, accelerated depreciation, and the research and development tax incentive. Corporate tax residency reform status is also a relevant consideration for entities.
The ATO provides a pre-release briefing to boards via the relationship manager prior to publication on the CTTR. Furthermore, the CTTR data is one factor used by the ATO in its risk-rating process for entities participating in the Top 1000 assurance program. While future reforms may alter reporting requirements, the current revenue thresholds remain in force as at 2025.
Frequently asked
Which entities are caught by section 3C transparency reporting?
Public and foreign-owned corporate tax entities with A$100M+ total income, Australian-owned private companies with A$200M+ total income, all significant global entities, and any entity that paid PRRT in the reporting year.
Does the CTTR show how much tax a company actually paid in cash?
It shows income tax payable on the company's lodged return, not cash tax paid. Differences between accounting tax expense and CTTR tax payable usually reflect timing differences, prior-year tax losses, and non-refundable offsets.