VAT registration: when you must register, how to apply, and what it costs you

VAT registration is not a formality a growing business can defer while it concentrates on sales. It is a threshold that arrives, and the obligations attach from the date it is crossed.

Compulsory or voluntary

	Compulsory	Voluntary
Trigger	Taxable turnover above the threshold in any 12 consecutive months, or a contractual commitment that will exceed it	Turnover at a lower level, with evidence of an enterprise
Discretion	None - registration is required	SARS assesses the application and may refuse
Evidence	Turnover records	Contracts, invoices, business bank account, proof of enterprise

The twelve-month test is rolling, not aligned to a financial year. A business that crosses the threshold in month eleven of a rolling window must register even if its financial year shows a lower figure.

Applying

Registration is done with SARS, through eFiling, using the VAT registration function. You will need:

• the business’s registration details (CIPC registration for a company, or the sole proprietor’s details),
• proof of the enterprise - contracts, invoices, a business bank account,
• the details of the responsible person,
• and for a voluntary application, evidence that the business will make taxable supplies.

A voluntary application that cannot show a genuine enterprise is refused, and a refusal does not prevent a later compulsory registration.

What you take on

Four obligations follow registration:

1. Charging VAT on taxable supplies at the standard rate.
2. Filing returns on the cycle SARS assigns - two-monthly for most small vendors.
3. Paying over the VAT collected less input VAT, on the last business day of the month following the period.
4. Keeping records and issuing tax invoices that meet the Act’s requirements.

The tax invoice point matters more than it appears. A supplier’s invoice missing a required element is not a valid tax invoice, and the customer cannot claim the input deduction on it. That is a commercial problem, not just a compliance one - and it is why a VAT calculation is only the first step; the document itself has to be right.

Is voluntary registration wise?

Work through the arithmetic honestly:

• Claim input VAT on business purchases - equipment, stock, services.
• Charge 15% to customers, which raises your price if they are not VAT-registered and cannot reclaim it.
• Carry the administration - returns, records, invoice formats, reconciliations.
• Suffer the cash-flow effect of paying over VAT collected before customers have paid you.

For a business selling to registered businesses, registration is usually neutral or beneficial and often expected. For a business selling to consumers, it can raise effective prices by 15% and shrink the market. Model it before applying, and remember that deregistration is not a simple reversal.

Related obligations

A VAT vendor that also employs staff has the full small business tax calendar - EMP201 by the 7th of each month, the EMP501 reconciliations, provisional tax and the company return. The CIPC annual return is a separate obligation to a different regulator, and missing it does not affect VAT but does affect the company’s standing.

Last reviewed 13 October 2026. VAT thresholds, categories and invoice requirements are set by the VAT Act and SARS practice; confirm the current thresholds on the SARS site before relying on a figure.