Sars has published a long-awaited consultation paper on VAT modernisation, setting out a five-corner e-invoicing model intended to pre-fill VAT returns and, in time, automate VAT assessment.

The detail that will surprise many businesses is the timeline: on the road map Sars has published, no vendor is required to do anything until the 2030s.

The paper sets out five phases:

Preparation, including the publication of draft VAT regulations, runs for about 12 months from 2026/2027.
Solution development, ending with those regulations promulgated, takes another 12 months in 2027/2028.
Quality assurance testing follows for roughly six months in 2028/2029.
Then comes a pilot with voluntary participants for six months in 2029/2030.
Phased implementation is expected to begin during the 2030 calendar year and run for about 36 months.

That puts full roll-out somewhere around 2033, with large businesses adopting voluntarily before any mandate arrives. Government entities may be brought in alongside them, followed by SMMEs and finally business-to-consumer transactions.

What the model actually does

The architecture is a five-corner Decentralised Continuous Transaction Control and Exchange model. A supplier issues a structured, machine-readable invoice from its accounting or ERP system and sends it to an accredited access point, which validates and clears it. That access point routes the invoice to the buyer’s access point, which validates it again before delivering it to the buyer. Both access points report the cleared invoice to a fifth corner, a service provider acting for Sars.

An e-invoice under this definition is not a PDF or a scanned document. It has to carry standardised data elements in a prescribed format, with candidate standards named as EN16931 CIUS, the UN/CEFACT Cross-Industry Invoice and Peppol PINT BIS. A Network Authority will accredit service providers and enforce the rules.

The endpoint is automation. Sars intends to use the transactional data to pre-fill VAT returns and, over time, to auto-assess VAT liability, with taxpayers confirming or amending the outcome to preserve self-assessment. It is the same logic already applied to personal income tax, where AI-driven compliance systems cross-check bank statements, VAT returns and CIPC records, and it sits inside the Modernisation 3.0 programme unveiled in April.

Through 2026, e-invoicing vendors and tax advisory firms have repeatedly put full operational capability at 2028, with roll-out beginning in 2026 or 2027. Most hedged those dates as indicative and subject to regulations that had not yet been written. Sars’s own document now puts quality assurance testing in 2028/2029 and mandatory adoption years after that. In other words, the road map is worth reading before signing a software contract sold on 2028 urgency.

That is not an argument for ignoring it. Large taxpayers will need ERP and accounting systems capable of issuing and receiving structured invoices, contracts with accredited access points, and finance processes rebuilt around continuous validation rather than month-end reconciliation. Those are multi-year projects.

Three things are left open:

The Network Authority, the interoperability framework and the standards will be determined by selection and procurement processes the paper says Sars is currently finalising.
On cost, Sars acknowledges taxpayers will have to invest in technology and integration, and says only that it will engage software providers on tiered subscription models to consider subsidised or low-cost options.
And “near real-time”, the phrase the whole model is predicated on, is left to be defined in legislation.

The caveat

One caveat applies to all of it. The paper carries a disclaimer that its contents reflect Sars’s current understanding of the proposed framework and may be refined after stakeholder input and further analysis. The dates are a plan, not a commitment, and the consultation could move them in either direction.

Read: AI is now hunting tax cheats in South Africa

Sars points to international precedent for the benefits, citing Mexico and Chile halving their VAT gaps, Mexico processing about 10 billion e-invoices a year, and Italy’s central clearance platform. France, like South Africa, has opted for a five-corner decentralised model rather than a single central platform.