The Gauteng High Court’s recent judgment in Ndyamara NO and Others v Commissioner for the South African Revenue Service has reopened debate around one of South Africa’s most controversial procurement scandals — the failed PRASA locomotive tender involving Swifambo Rail Leasing.

Beyond the factual history of corruption and procurement irregularity, however, the judgment raises a more difficult legal question: When a contract is declared void ab initio, can its tax consequences nevertheless survive?

In dismissing the liquidators’ attempt to recover approximately R235 million in VAT paid to SARS, the court held that the VAT payments had been made ‘for value’, because they discharged an existing statutory liability under the VAT Act. The judgment accordingly concluded that the payments could not be set aside under section 26 of the Insolvency Act.

The facts are well known. PRASA awarded Swifambo a R3.5 billion locomotive supply contract in 2013. Swifambo supplied 13 locomotives, invoiced PRASA, and paid output VAT to SARS. The contract was later reviewed and declared unlawful after the tender process was found to have been fundamentally irregular and tainted by corruption.

Retroactive Nullity versus Retrospective Invalidation

The liquidators argued that because the agreement had been declared void ab initio, the legal cause underpinning the VAT payments fell away entirely.

Properly understood, however, the issue was not merely one of retrospective invalidation, but of true retroactive nullity — namely that the contract was to be treated as though it had never existed at all. This distinction is significant. A merely retrospective setting aside may leave certain accrued consequences intact, whereas retroactive nullity traditionally extinguishes the juridical foundation of the transaction entirely and requires restoration of the parties to their original positions as far as possible.

PRASA’s return of the locomotives was itself consistent with this principle of restoration. On the liquidators’ approach, once the contract disappeared in law, the VAT payments became sine causa, and SARS could no longer rely on the same void agreement to justify retaining the fiscal benefit derived from it.

The court nevertheless concluded that VAT liability arose at the moment invoices were issued and consideration received, and that the later invalidation of the contract did not retrospectively extinguish those fiscal consequences.

That reasoning raises an important conceptual question. The judgment repeatedly emphasises that locomotives were supplied, invoices were issued, and payments were received. Yet the central issue was arguably not whether conduct occurred in fact, but whether that conduct retained legal force once the underlying agreement had been declared void ab initio.

Fiscal Reality versus Juridical Validity

The judgment reflects a broader tension between fiscal reality and juridical validity.

On the one hand, public procurement law treated the agreement as unlawful and void from inception. On the other hand, SARS was permitted to retain the VAT generated by the same transaction on the basis that taxable supplies had factually occurred.

This creates an apparent conceptual tension. If the agreement never legally existed, it becomes difficult to determine precisely which elements of the transaction survive its invalidation and why.

The court was clearly influenced by concern for the public fiscus. The judgment expressly warns against shifting the financial consequences of corruption and unlawful procurement onto the public purse. That concern is understandable, particularly given the scale of the PRASA scandal and the public-interest considerations involved.

At the same time, the emphasis on protecting the fiscus raises the question whether the deeper implications of retroactive invalidity received sufficient consideration. The interaction between constitutional legality, insolvency principles, and VAT liability remains complex and not entirely settled in South African law.

Alternative VAT Approaches

The legal debate becomes even more nuanced when viewed against alternative VAT constructs following the collapse of the transaction.

One possible approach treated the subsequent return of locomotives as merely a continuation or ‘perfection’ of the original supply for which VAT had already been accounted.

A second, and perhaps conceptually stronger, approach proceeded from the retroactive nullity of the agreement itself. Under that construct, once the contract was declared void ab initio, no obligations arising from it survived. Any later return of locomotives or repayment obligations, therefore, had to be analysed independently from a VAT perspective.

On that reasoning, subsequent arrangements could potentially constitute exempt financial services or even non-supplies for VAT purposes altogether.

The High Court ultimately preferred an analysis rooted in the mechanics of invoicing, payment, and supply under the VAT Act. Whether that approach sufficiently addresses the jurisprudential consequences of retroactive nullity may well become the subject of further judicial scrutiny.

An Issue Destined for Appeal

For that reason, the judgment is unlikely to represent the final word on the interaction between void contracts and fiscal liability.

The matter implicates constitutional legality, public procurement, insolvency law, and the conceptual foundations of VAT simultaneously. Given those dimensions, the dispute appears particularly well-suited for further consideration by the appellate courts, including potentially the Constitutional Court.

The final word on whether VAT can survive a contract that, in law, never existed at all has almost certainly not yet been written.