What input tax means
Input tax describes the deductible VAT side of a vendor’s VAT calculation. In an ordinary purchase, the vendor reviews VAT charged by a supplier and whether the goods or services were acquired for making taxable supplies.
The SARS VAT 404 guide also discusses other situations, including imports and qualifying second-hand acquisitions. The records and rules for those cases are not necessarily the same as for a local supplier’s tax invoice.
The amount paid to the supplier and the amount deductible as input tax are different figures. Eligibility must be established before an amount is entered as a deduction on the VAT return.
Why use and evidence both matter
Check what was acquired, which entity acquired it and how it is used. A cost can appear in the business accounts without every part of its VAT being deductible. Private use, exempt activities and specific statutory restrictions can change the answer.
Then check the relevant supporting document. SARS’s tax-invoice guidance explains why prescribed particulars matter. A bank statement shows a payment but may not identify the supply, VAT treatment or recipient sufficiently.
Keep the invoice, purchase explanation and calculation together. Where a cost serves mixed purposes, obtain an appropriate review of the allocation instead of claiming the whole VAT amount because the company paid the bill.
The monthly bookkeeping checklist helps organise the records before a return is prepared.
Illustrative example: supplies for a repair workshop
A fictional VAT vendor operates a repair workshop and buys consumables for its taxable repair work. Its accounts clerk checks that the supplier document identifies the workshop correctly, describes the goods and contains the required VAT details.
The clerk also confirms that the purchase belongs to the workshop’s business activity and checks the applicable deduction period. Subject to the relevant rules, the supported VAT amount can enter the input-tax calculation.
On the same shopping trip, the owner buys a household appliance for private use. Paying both items with the business card does not make their VAT treatment identical. The records must distinguish the private purchase.
This example shows the review process. It does not establish deductibility for a real transaction or suggest that every item described as a business expense qualifies.
What input tax is not
Input tax is not the full cost of a purchase, an income-tax expense deduction or a guaranteed cash refund. The VAT return considers output tax and permitted deductions; its overall result may be an amount payable or a refund position requiring further processing.
It is also not permission to invent VAT on a receipt from a supplier that did not charge it. Special rules for matters such as second-hand goods need their own evidence and conditions rather than an ordinary-invoice assumption.
If an invoice is incomplete, request a proper correction from the supplier and retain the history. For VAT-return support, provide the original records and explain unusual or mixed-use transactions before claiming the amount.
Sources and review
Checked on 30 September 2026. Use the linked official guidance for current requirements and forms.
- SARS VAT 404 guide
Input-tax purpose, evidence, restrictions and special acquisition cases; no outdated thresholds reproduced.
- SARS tax invoices
Invoice particulars and documentary evidence; not treated as an exhaustive statement of all special cases.
- SARS vendor obligations
Output tax less allowable input tax and separate return obligations.
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