VAT: Mechanics, Common Traps, and a Worked Example
The building blocks
VAT is a multi-stage tax on consumption, collected by businesses on behalf of the revenue authority. A candidate must understand: taxable persons and the registration threshold; taxable supplies versus exempt supplies; the distinction between output tax and input tax; the credit mechanism that makes VAT neutral for registered businesses; zero-rating versus exemption; place and time of supply; and the invoice and record-keeping requirements.
Traps that recur in questions
The biggest trap is zero-rated versus exempt. A zero-rated supply is taxable at 0 percent, so input tax remains recoverable. An exempt supply is outside the scope of charging, so related input tax is generally not recoverable. Questions frequently present both and ask for the net VAT position.
Second, input tax recovery rules: input tax must relate to taxable supplies. Where a business makes both taxable and exempt supplies, apportionment may be required. Third, time of supply: tax points can arise on invoice, on payment, or on delivery depending on the rules, so read dates carefully. Fourth, registration threshold: a business below the threshold may still register voluntarily, and the consequences differ.
Worked example
A registered trader makes standard-rated sales of 400,000 and zero-rated sales of 100,000, and incurs input tax of 30,000 wholly attributable to taxable supplies. Output tax at 15 percent on standard-rated sales = 60,000. Input tax recoverable = 30,000. Net VAT payable = 30,000. If instead the 100,000 were exempt, the input tax would need apportionment and part would be irrecoverable.
Rule of thumb
Ask two questions in order: is the supply taxable, and is the input tax attributable to taxable supplies? Only then do the arithmetic.