Most small business owners know roughly that VAT registration kicks in somewhere around R1 million. What they often do not know is exactly when the clock starts, what counts towards that figure, how quickly they need to act once they cross it, and what SARS does to businesses that register late. The details matter — because the consequences of getting this wrong are not just a fine. They are a retroactive VAT liability on every invoice you issued from the day you should have registered, regardless of whether you charged your customers VAT or not.
If your business is growing and your monthly revenue is climbing, this is the article to read before you hit the threshold, not after.
The R1 Million Threshold: What It Actually Measures
The obligation to register for VAT arises when your taxable turnover exceeds R1 million in any consecutive 12-month period, or when it is reasonably expected to exceed R1 million in the next 12 months.
Two things in that sentence trip businesses up.
"Consecutive 12-month period" is not the financial year. This is a rolling window, not a calendar year or tax year measurement. You need to be monitoring your taxable turnover on a rolling basis — adding the most recent month and dropping the oldest — every single month. A business that earns R70,000 per month would cross the threshold partway through month 15, but depending on seasonality, a business with R60,000 average monthly revenue could cross it earlier in a strong quarter.
"Taxable turnover" is not the same as total revenue. Taxable supplies include standard-rated supplies (15% VAT) and zero-rated supplies (0% VAT, but still counted as taxable). They exclude exempt supplies, which include residential rental income, certain financial services, and educational services provided by registered institutions. If your revenue includes a mix of taxable and exempt supplies, only the taxable portion counts toward the R1 million threshold.
There is also the forward-looking test: if at any point it is reasonably expected that your taxable supplies will exceed R1 million in the next 12 months — for example, because you have signed a large contract — the registration obligation arises immediately, even if you have not yet crossed the threshold historically.
The 21-Day Clock
Once you cross the threshold — or once it is reasonably certain you will — you have 21 days to apply for VAT registration with SARS. This is not a soft target. It is a statutory deadline in the Value-Added Tax Act, and it runs from the date your turnover first exceeded R1 million (or from the date on which the expectation of exceeding it arose).
If you miss the 21-day deadline, SARS is empowered to raise a VAT assessment covering all periods from the date you should have registered. Every sale you made after that date is deemed to have included output VAT — even though you did not charge your customers 15% VAT. You absorb the liability.
Add to that a 10% late registration penalty on the outstanding VAT amount, plus interest at the prescribed rate from the date each payment was due. For a business with R100,000 per month in taxable supplies running 12 months past the point of mandatory registration, the exposure before interest can exceed R150,000.
The Approach Phase: What to Monitor and Prepare
The most common VAT registration failure is not fraud or deliberate evasion — it is a business owner who did not realise they were approaching the threshold until after they had crossed it and let the 21-day window slip.
Preventing this requires a simple monthly discipline: add up your taxable supplies for the trailing 12 months. Ideally your bookkeeping system does this for you. If it does not, a monthly spreadsheet is sufficient. Set a trigger: when you cross R900,000 on a rolling basis, start preparing.
What to prepare:
Documents you will need for the VAT101 application: - Your income tax reference number (for a company: also the company registration number) - Banking details — the account into which SARS will pay any VAT refunds - Proof of address for the business premises - Three to six months of recent bank statements - A signed lease agreement or title deed if you own the premises - ID document(s) of the company director(s) or sole proprietor
Pricing and invoicing: - Will you absorb the VAT by keeping prices as they are (i.e., your price now includes 15% VAT, so your net income decreases), or will you add VAT on top of current prices? - If you add VAT on top, which of your key clients are themselves VAT-registered and can claim it back, and which are end-consumers who cannot? - Non-VAT-registered clients (mostly members of the public or small businesses below the threshold) will experience your prices as 15% more expensive. This is worth communicating before it shows up on an invoice.
Invoicing system: - Once registered, every tax invoice you issue must include your VAT registration number, the VAT amount charged, and the tax period. Your invoicing system needs to be updated before your first VAT-registered invoice is issued — not after.
How the Registration Works
VAT registration is completed on eFiling using the VAT101 application. Log in to eFiling, navigate to the relevant taxpayer (your company or your individual profile if you are a sole proprietor), and look for the VAT registration option under the Registrations menu.
You will complete the VAT101 form, upload supporting documents, and describe your principal business activity. SARS may contact you to request additional documents, or may arrange a field visit for higher-risk or higher-value applications. Once approved, SARS issues a VAT registration certificate and assigns you a VAT registration number. Your first VAT201 return will cover the period from your effective registration date.
Note that SARS also assigns you a VAT category (A, B, or C) determining how often you submit: - Category A and B — bi-monthly (every two months), on different month-end cycles - Category C — monthly (for businesses with taxable supplies exceeding R30 million per year)
Most SMEs registering around the R1 million mark are placed in Category A or B.
Common Mistakes — and How They Create Problems
Waiting until the financial year-end to check whether registration is required. The threshold is rolling, not annual. By the time your accountant raises it at year-end, you may have been operating unregistered for six months past the point of obligation.
Misclassifying exempt income as taxable — or vice versa. Businesses with mixed supplies (for example, a guesthouse providing accommodation at 15% VAT and long-term residential rental at 0% VAT) sometimes miscalculate which income counts toward the threshold. Over-counting pushes you into mandatory registration before you need to be there. Under-counting keeps you unregistered when you should not be.
Not adjusting pricing before registration. Issuing a VAT-inclusive invoice at your old price to a client who expected to pay that price exclusive of VAT creates an awkward conversation. Worse, if your client is themselves VAT-registered and claims the input tax credit, SARS can trace the transaction. Plan the pricing transition before registration, not after.
Filing the VAT201 without understanding the billing basis. Newly registered vendors often do not realise that SARS places them on either an invoice basis (VAT is accounted for when an invoice is issued) or a payments basis (VAT is accounted for when cash is received). The payments basis is available to vendors with taxable turnover below R2.5 million and can significantly help cash flow where invoices are paid 30–60 days late. Ask your accountant which basis is appropriate before your first return is filed.
Missing the first return deadline. The excitement of getting registered and the unfamiliarity with the new system means businesses sometimes miss their first VAT201 submission. Late submission attracts a 10% penalty on the amount due, plus interest. Set a calendar reminder for the last business day of the month following the end of your first VAT period.
What to Do Next — Practical Checklist
Before the threshold: - [ ] Track rolling 12-month taxable turnover monthly - [ ] Set an alert at R900,000 to start preparing - [ ] Decide on your pricing strategy (absorb VAT vs add on top) - [ ] Identify which clients are VAT-registered vs end-consumers - [ ] Gather the documents listed above
At registration: - [ ] Submit the VAT101 via eFiling (or ask your accountant to) - [ ] Update your invoicing system with your VAT number once issued - [ ] Understand your VAT category (A, B, or C) and your submission cycle - [ ] Confirm whether you are on invoice basis or payments basis - [ ] Book your first VAT201 deadline in your calendar
After registration: - [ ] Issue valid tax invoices on every sale (VAT number, tax amount, period) - [ ] Retain all supplier tax invoices for input tax claims - [ ] Reconcile your VAT account monthly, even if you submit bi-monthly - [ ] File the VAT201 on time every period — the 10% late penalty compounds
What SARS Does If You Register Late
If SARS identifies that you should have registered and did not — through a third-party data match, an audit trigger, or an industry risk review — they will raise a VAT assessment for all periods from your date of mandatory registration. The assessment will include:
- –Output VAT on all taxable supplies made from that date (calculated at the VAT-inclusive fraction: 15/115 of the invoice value if you did not charge VAT separately)
- –A 10% late registration penalty on the assessed VAT
- –Interest at the prescribed rate from the date each amount was due
You may be able to claim input tax credits for the same period to reduce the net liability — but only where you have valid tax invoices from VAT-registered suppliers. If your suppliers are not VAT-registered, those purchases do not generate claimable input tax.
The most important thing to know is that voluntary disclosure before SARS raises the assessment significantly reduces the penalty exposure. SARS's Voluntary Disclosure Programme (VDP) allows taxpayers who come forward proactively to settle the underlying liability with reduced or waived penalties. If you believe you should have registered and did not, the VDP is the right conversation to have before SARS initiates contact.
If your business is growing toward the VAT threshold — or you suspect you may already have crossed it — [contact Sikatrix Business Accountants](/contact) for a free consultation. We will review your trading history, confirm your registration position, manage the VAT101 process, and set up your compliance calendar so the first return is not also the first surprise.
References
- –[SARS: Value-Added Tax — Registration](https://www.sars.gov.za/types-of-tax/value-added-tax/vat-registration/) — Official SARS guide to VAT registration thresholds and the VAT101 process
- –[SARS: VAT 404 Guide for Vendors](https://www.sars.gov.za/wp-content/uploads/Ops/Guides/VAT-Gd-VAT-404-Guide-for-Vendors.pdf) — Comprehensive SARS guide covering invoice basis, payments basis, VAT categories, and return obligations (PDF)
- –[SARS: Voluntary Disclosure Programme](https://www.sars.gov.za/voluntary-disclosure-programme/) — How to come forward proactively before SARS initiates an audit
*This article is for general information only. VAT registration obligations depend on your specific circumstances. Consult a [registered tax practitioner](/contact) before registering or making changes to your VAT status.*
