VAT registration is compulsory once your turnover passes the threshold, optional below it, and misunderstood almost everywhere.

The important thing to grasp first is that VAT is not your money at any stage. You collect it on SARS's behalf and hand it over. A business that treats VAT collected as revenue is spending money it owes, and the shortfall arrives on a schedule.

Compulsory, voluntary, and the threshold

Once taxable turnover over a twelve-month period exceeds the compulsory threshold, you must register. It is measured on turnover, not profit, and it can arrive quickly in a business that turns over a lot at thin margins.

There is also a lower voluntary threshold. Registering voluntarily can make sense if your customers are themselves VAT-registered businesses — they claim back what you charge, so your price is effectively unchanged to them while you start claiming input VAT on your own costs.

It rarely makes sense if you sell mostly to consumers. They cannot claim anything back, so registering means either raising prices or absorbing the VAT out of your margin.

What changes on the day you register

  • You charge VAT on everything taxable that you sell.
  • You claim back VAT on what you buy, where the supplier is registered and you hold a valid tax invoice.
  • You file returns on a cycle and pay over the difference.
  • Your invoices must meet the requirements of a tax invoice — there are specific details that must appear, and your customers cannot claim without them.

Your pricing decision arrives immediately. If you were charging R1,000 and now must add VAT, either your consumer customers pay more or you earn less on each sale. Decide deliberately rather than discovering it at the first invoice.

The discipline that matters

Keep the VAT you collect apart from the money you spend. A separate account, swept at the same time each month, is the simplest possible system and it prevents the single most common VAT problem: a return that is correct and a payment that cannot be made.

Keep your input invoices. A claim without a compliant tax invoice behind it will be disallowed, and disallowed claims turn a return you thought was neutral into a payment.

Watch the threshold before you cross it

Registration is triggered by turnover, and a good few months can take you over it without any decision on your part. Know roughly where you are through the year rather than finding out afterwards, because late registration means SARS treats you as having been liable from the date you should have registered — including for VAT you never charged your customers.

That is a bill paid out of your own margin, on sales already made and already spent.

General guidance, not tax advice. Thresholds, rates and invoice requirements change; confirm the current position with SARS or a registered tax practitioner.