The Commissioner for the South African Revenue Service v Pieter Johan Erasmus

The taxpayer, Pieter Johan Erasmus, received dividends exceeding R1.2 billion from Treemo (Pty) Ltd on 27 March 2017. He declared the dividends but claimed no tax was payable due to secondary tax on companies (STC) credits acquired by Treemo under section 64J of the Income Tax Act. The Commissioner concluded that a series of transactions constituted an impermissible tax avoidance arrangement under the general anti-avoidance rule (GAAR) provisions (sections 80A to 80L of the Income Tax Act 58 of 1962). The Commissioner issued a section 80J(1) notice setting out his reasons for applying the GAAR, identifying the Newshelf repurchase as central to the avoidance arrangement. The Commissioner assessed the taxpayer to dividends tax of R183.5 million plus an understatement penalty and interest. The taxpayer objected and appealed to the Tax Court. In his rule 31 statement opposing the appeal, the Commissioner significantly modified his reasons and proposed remedy, now focusing on transactions involving the Trust's subscription for shares in Treemo and a related call option agreement, rather than the Newshelf repurchase. The Commissioner claimed authority to make these changes under section 80J(4) of the ITA and rule 31(3) of the Tax Administration Act rules. The taxpayer brought an application under uniform rule 30 to have the rule 31 statement set aside as an irregular step.

• Whether the Commissioner may lawfully modify his reasons for applying the GAAR and amend the proposed remedy after issuing a GAAR assessment under section 80B, by relying on section 80J(4) of the Income Tax Act
• Whether section 80J(4) permits modification of reasons after a GAAR assessment has been raised or only during the pre-assessment phase
• Whether rule 31(3) of the Tax Administration Act rules operates as an independent source of power to permit material modifications to the factual grounds and proposed remedy in a GAAR assessment
• Whether the modifications and amendments made in the rule 31 statement constituted a prohibited novation or required a revised assessment within the meaning of rule 31(3)
• Whether the rule 31 statement constituted an irregular step that should be set aside

The appeal was dismissed with costs, including costs of two counsel. The Tax Court's order setting aside the rule 31 statement as an irregular step was upheld.

Section 80J(4) of the Income Tax Act is time-bound and only permits the Commissioner to modify or revise reasons for applying the GAAR during the pre-assessment phase, that is, before a determination is made under section 80B. Once a GAAR assessment has been raised, section 80J(4) can no longer be invoked to justify modifications to the reasons for applying the GAAR. Rule 31(3) of the Tax Administration Act rules cannot operate as an independent source of power to permit material modifications to both the reasons for applying the GAAR and the proposed remedy where this amounts to a new exercise of the section 80B(1) power without compliance with the requisite GAAR procedural steps. Modifications and amendments that affect both essential components of the Commissioner's GAAR assessment powers (the reasons for applying the GAAR and the remedy adopted under section 80B) and go to the core of the determination made under section 80B(1) require the issue of a revised assessment and are prohibited under rule 31(3).

The Court noted with approval the obiter dictum in United Manganese of Kalahari (Pty) Ltd v Commissioner for the South African Revenue Service [2025] ZACC 2 at paragraphs 319-320, where the Constitutional Court stated that the argument that section 80J(4) is limited to the pre-assessment phase 'is not without merit' and that the section 'appears to accommodate the case of a change of reasons before the GAAR assessment is issued'. The Court also observed that in GAAR cases, the letter of assessment has a heightened significance because the GAAR permits the Commissioner to impose a tax burden on a taxpayer despite the taxpayer having acted in a way that was otherwise permissible within the substantive terms of the Income Tax Act. The Court noted that while it was tempting to confine the inquiry to rule 31(3), there is an inextricable connection between the Commissioner's power under section 80J(4) and the power under rule 31(3), making it necessary to consider both.

This case provides important clarification on the scope and temporal limitations of the Commissioner's powers under the GAAR provisions of the Income Tax Act. It establishes definitively that section 80J(4) cannot be used to modify reasons for applying the GAAR after a GAAR assessment has been issued under section 80B. The judgment emphasizes the heightened significance of the letter of assessment in GAAR cases and the importance of strict compliance with the GAAR provisions as the source of the Commissioner's administrative power to impose tax burdens outside the ordinary operation of the tax statutes. The case also clarifies that rule 31(3) of the TAA rules cannot operate as an independent source of power to circumvent the limitations of section 80J(4). This decision provides important procedural protections for taxpayers facing GAAR assessments and limits the Commissioner's ability to fundamentally change the basis of a GAAR assessment during appeal proceedings. The judgment was influenced by and aligns with obiter dicta from the Constitutional Court in United Manganese of Kalahari (Pty) Ltd v CSARS [2025] ZACC 2.