VAT · South Africa
A South African tax invoice must show the words "tax invoice", the supplier's name, address and VAT number, a serial number and date, a proper description, and the price and VAT. Where the consideration exceeds R5,000, section 20(4) also requires the recipient's name, address, VAT number and the quantity supplied.
Last updated 2026-09-04. Published by Umbra ERP.
SARS puts it about as directly as a revenue authority ever does: the most important document in a VAT system is the tax invoice. Without a proper tax invoice, or alternative documents approved by the Commissioner, a vendor cannot deduct input tax on purchases made for the enterprise. That single sentence explains why customers chase you for corrections and why an invoice with a missing field turns into a phone call three months later.
The money at stake is not yours. When you issue a defective tax invoice, you still owe SARS the output tax on the supply. What breaks is your customer's ability to deduct that same VAT as input tax. On a R230,000 invoice at 15 per cent, that is R30,000 your customer cannot claim, on a document you controlled and they did not. They will come back, and they will be right to.
Issuing tax invoices is not optional either. SARS describes it as an obligation on every vendor who makes taxable supplies in the course or furtherance of their enterprise, and an integral part of the audit trail of a vendor and its activities. Failure to issue tax invoices is a contravention of the Act and vendors will be guilty of an offence, under section 234 of the Tax Administration Act.
It also helps to separate two documents that most businesses merge. A commercial invoice is any document notifying the purchaser to make payment. It can cover taxable and non-taxable supplies, and it can trigger the time of supply. A tax invoice is the narrower thing: issued only for a taxable supply, containing all the particulars the VAT Act prescribes, and usable to support a deduction for input tax. In practice many vendors combine the two to avoid duplication, which is fine, provided the combined document actually meets the tax invoice requirements. That proviso is where most of the failures live.
All section references below are to the Value-Added Tax Act 89 of 1991, and the practical detail follows the SARS VAT 404 Guide for Vendors, Issue 15.
You issue tax invoices because you are a registered VAT vendor. Registration is compulsory once the value of taxable supplies made in any consecutive 12 month period exceeded, or is likely to exceed, R2.3 million, and you must apply within 21 business days from the date the R2.3 million is or will be exceeded. Note that the test is any consecutive 12 month period, not your financial year, and that "is likely to exceed" makes it forward-looking as well as backward-looking.
Voluntary registration sits below that. Where the value of taxable supplies made or to be made is less than R2.3 million but has, in certain circumstances, exceeded R120,000 in the past 12 months, a vendor may apply to register voluntarily. Whether that is a good idea depends almost entirely on who your customers are. If they are VAT vendors, registering makes you cheaper to buy from in real terms because they recover the VAT. If they are consumers, registering makes you 15 per cent more expensive or 13 per cent less profitable, and nothing else changes.
Once registered, the timing rule is section 54 as amended with effect from 1 April 2015: a vendor must issue a tax invoice to the recipient within 21 days of the supply having been made, for any supply where the consideration exceeds R50, whether the recipient has requested it or not. The same applies where your agent issues the invoice on your behalf. Waiting to be asked is not a defence.
There is one rule that surprises people and is worth internalising before you design any billing process around corrections. SARS states that it is illegal to issue more than one tax invoice per taxable supply, and that another tax invoice may not be issued to alter the consideration in respect of an original tax invoice already issued. Changes to the amount are handled by a credit note or a debit note under section 21, never by a second invoice.
A full tax invoice is required where the consideration for the supply is more than R5,000, including tax. These are the particulars it must reflect.
Two of those deserve emphasis because they are the ones software gets lazy about. "A full and proper description" is not a stock code. If your line reads "SKU-4471 x 3" and nothing else, an auditor cannot tell what was supplied, and neither can your customer's bookkeeper eighteen months later. Write what the thing is.
The recipient's VAT registration number is a full tax invoice requirement, and SARS is explicit that a full tax invoice must indicate the recipient's VAT registration number if that person is a vendor. This is the single most commonly missing field on South African invoices, and it is missing because the supplier never collected it. That is a data problem, not an invoicing problem, and it is solved before the sale rather than after it.
Zero-rated supplies take a full tax invoice regardless of value. SARS states that a full tax invoice must be issued in respect of zero-rated supplies even if the consideration is less than R5,000. If you export, or supply anything else at the zero rate, the abridged form is not available to you.
Where the consideration for the supply is less than R5,000, including tax, an abridged tax invoice may be issued under section 20(5), except where that supply is zero-rated. The abridged form drops exactly two things from the full list: the recipient's details, and the quantity or volume.
What remains is the label ("tax invoice", "invoice" or "VAT invoice"), the name, address and VAT registration number of the supplier, the serial number and date of issue, a full and proper description of the goods or services, and the price and VAT. This is the form of nearly every till slip you have ever kept for a claim, which is why they look the way they do.
Below R50 the obligation falls away entirely. SARS states that if the consideration in money for the supply is R50 or less, a tax invoice is not required, and correspondingly that vendors are not obliged to obtain tax invoices for purchases not exceeding R50. That is not permission to issue nothing. The guide adds that a document such as a till slip or sales docket indicating the VAT charged by the supplier will be required to confirm the output tax declared and to verify the input tax deducted. Something has to exist.
There is also a discretion worth knowing about, even though most businesses will never invoke it. Under section 20(7), if the Commissioner is satisfied that it is impractical to issue a full tax invoice for a particular transaction and that sufficient other records are available, the Commissioner may direct that a tax invoice need not be issued, or that certain particulars need not be reflected. The application of that discretion is set out in Binding General Ruling 27 and Interpretation Note 83. It is a ruling you apply for, not a judgement you make yourself on a Friday afternoon.
The Act does not force one layout on you. There are three accepted methods of reflecting the consideration and the VAT on a tax invoice, a debit note or a credit note, and any of them is valid.
Method 1 is the sensible default for a business-to-business invoice, because it is the layout an accounts payable clerk can process without doing arithmetic, and because it survives being read by an auditor who does not trust your rounding. Method 2 is the retail default, because a shelf price is a total and the customer does not want a breakdown.
What you cannot do is show nothing. An amount with no indication of the VAT position, on a document from a registered vendor, is not a tax invoice, however clearly it demands payment. Nor should the VAT position be inferred: if a line is zero-rated or exempt, say so on the line rather than leaving the reader to work out why the totals do not multiply out.
Rounding deserves a moment of care in any system that computes VAT per line. Compute the tax on the same base your customer will, present the total that reconciles, and do not let a half-cent difference between per-line and per-invoice rounding turn into a query on every document you send.
Ask any South African bookkeeper for the most common defect on a supplier invoice and the answer will be the recipient's VAT number, followed closely by an address that does not match the registered entity. Both have the same cause: the supplier never collected the details properly, and by the time the invoice is being raised, nobody wants to hold up a sale to go and find them.
The consequences land asymmetrically. You have declared and paid the output tax, so your position is unchanged. Your customer is the one holding a document that will not support an input tax deduction, and their deduction is limited to a period of five years in any event, so it is not something they can leave indefinitely. You will get the call, and you will spend time on a correction that a two-minute data-collection step would have prevented.
The clean fix is to stop treating tax details as something captured during invoicing. They belong on the customer record, collected once, before the first invoice, and confirmed by the customer rather than typed from memory by a salesperson. The registered legal name, the trading address, the company registration number and the VAT number are the customer's own facts. They are the only party who can supply them accurately, and they have every incentive to.
This is exactly what Umbra's client self-service details link is for. A quotation email can carry a private link where the client fills in their own legal name, address, tax number, VAT number and billing email addresses. The answers merge onto the customer record, and a blank field is treated as unanswered rather than as an instruction to delete, so a half-completed form never wipes details you already hold. Because it attaches to the quotation, the details arrive before the invoice is raised rather than after it has been rejected. The feature attaches to quotations rather than invoices, and it is off until you switch it on.
Where the details still need correcting later, the section 21 route below is the one to use for anything affecting the consideration. For a plain data error that does not change the amount, get it right at source instead of relying on a fix: the rule against issuing more than one tax invoice per supply exists precisely because a second document creates ambiguity about which one supports the deduction.
When the agreed consideration changes after a tax invoice has been issued, section 21 supplies the mechanism. A debit note is issued by the supplier where the previously agreed consideration is subsequently increased. A credit note is issued where it is subsequently reduced, and also where faulty goods are returned by the customer.
SARS lists the events that trigger one: a supply of goods or services is cancelled, or the nature of the supply has been fundamentally varied or altered, along with the other adjustment events set out in the guide. A cancelled order, a returned delivery, a corrected quantity and a renegotiated price are all handled here rather than by editing history.
The last two rows are the ones systems most often skip and auditors most often ask for. A credit note that says only "credit R2,300" with no reason and no reference to an original invoice is an unexplained reduction in output tax. A credit note that says "quantity corrected from 12 to 10, refer tax invoice INV-2026-0412 dated 14 August 2026" answers the question before it is asked.
Umbra raises credit notes as first-class documents alongside quotes, sales orders, invoices and statements, each carrying its own currency, so a correction is recorded as its own numbered document rather than as an edit to the original. That is the behaviour the Act assumes.
One rule catches out every South African business that sells across a border. A tax invoice must be in South African currency, except for a zero-rated supply, for example goods exported, or in the case of certain supplies of electronic services by non-resident suppliers. An invoice denominated in dollars for a domestic standard-rated supply is not a valid tax invoice. If you quote in another currency for commercial reasons, the tax invoice still has to be in rand.
That is a system design constraint rather than a policy preference, and it is worth checking that whatever you use can hold a customer in one currency and still issue the rand document the Act requires. In Umbra, every quote, invoice, receipt and sales order carries its own currency, and amounts are never summed across currencies, so a rand tax invoice and a foreign-currency quotation can coexist without one silently contaminating the other. Exchange rates are fetched from an official rate API first and a bank second, parallel-market quotes are refused outright, and a rate that is already stale when fetched is rejected.
Keep the documents. SARS requires vendors to keep records of documentary proof and other records of transactions for at least five years, and any claim for input tax is itself limited to a period of five years. Five years of invoices, credit notes and the supporting evidence behind them is a volume that argues for a system rather than a filing cabinet, and it argues for one that numbers documents sequentially without gaps.
The fields genuinely worth automating are the ones that are constant per business or per customer and are therefore pointless to retype: your own name, address and VAT number on every document, the customer's name, address and VAT number pulled from a record they confirmed themselves, sequential serial numbering, the date of issue, and the VAT presentation method. What should never be automated away is the description of what was supplied, because that is the field that carries the actual information.
Umbra runs the full quote-to-cash path, so a quotation becomes a sales order becomes an invoice becomes a receipt with the customer details carried through rather than re-entered, recurring invoices issue on their schedule, and recording a payment raises a receipt automatically. Where the assistant proposes invoice or quote lines from a pasted customer conversation, prices are re-read from your product catalogue at the moment of execution rather than taken from the conversation, and nothing is written until you confirm it.
What Umbra does not do is decide your VAT position or talk to SARS. It does not determine whether you have crossed the R2.3 million registration threshold, it does not produce a VAT201, and it does not submit anything to eFiling. Your VAT registration, your returns and your reconciliations happen on SARS eFiling, using the documents the system produced. The correctness of those documents is still yours to check, and the cheapest place to check it is once, against the section 20(4) list, before the first invoice goes out.
The words "tax invoice", "invoice" or "VAT invoice", the supplier's name, address and VAT registration number, a serial number and date of issue, a full and proper description of the goods or services, and the price and VAT. Where the consideration is R5,000 or more, section 20(4) also requires the recipient's name, address and VAT number, and the quantity or volume supplied.
A full tax invoice is required where the consideration exceeds R5,000 including tax, under section 20(4). Below R5,000 an abridged tax invoice may be issued under section 20(5), which omits the recipient's details and the quantity or volume. Zero-rated supplies always require a full tax invoice, even below R5,000.
No. If the consideration in money for the supply is R50 or less, a tax invoice does not have to be issued, and the purchaser is not obliged to obtain one. You do still need a document such as a till slip or sales docket indicating the VAT charged, so that the output tax declared can be confirmed and any input tax deducted can be verified.
Twenty-one days from the date the supply was made, for any supply where the consideration exceeds R50, and whether or not the recipient asked for it. The same deadline applies where your agent issues the invoice on your behalf. Failure to issue tax invoices is a contravention of the Act.
Not for a domestic standard-rated supply. A tax invoice must be in South African currency, with two exceptions: a zero-rated supply such as exported goods, and certain supplies of electronic services by non-resident suppliers. You can quote in another currency for commercial reasons, but the tax invoice itself has to be in rand.
Your position is unchanged, because you still declare and pay the output tax. Your customer is the one who cannot use the document to support an input tax deduction, since a full tax invoice must indicate the recipient's VAT registration number where that person is a vendor. Expect the invoice to come back for correction, and collect tax details onto the customer record before you invoice.
Not to change the amount. SARS states that it is illegal to issue more than one tax invoice per taxable supply, and another tax invoice may not be issued to alter the consideration on an original invoice. An increase is handled by a debit note and a reduction by a credit note under section 21, each carrying a reason and a reference to the original invoice.
Once the value of taxable supplies made in any consecutive 12 month period exceeded, or is likely to exceed, R2.3 million. You then have 21 business days from the date that figure is or will be exceeded to apply. Voluntary registration is available below that, where taxable supplies have exceeded R120,000 in the past 12 months in certain circumstances.
Regulatory figures on this page are taken from the following primary sources. Tax rates and thresholds change; check the source before relying on a figure.