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VAT
Add or remove VAT from an amount and show the net, tax and gross figures.
Open calculatorUK / SCENARIO
VAT calculator
Calculations run in your browser.
Total including VAT
| Net amount | £100.00 |
|---|---|
| VAT | £20.00 |
| Gross amount | £120.00 |
Single-amount VAT arithmetic, rounded to the nearest penny. This does not determine whether an item is exempt, zero-rated or eligible for a reduced rate. Invoice-line and retail rounding rules can differ.
Check the inputs to calculate a result.
Calculation details
Add or remove VAT
Adding VAT multiplies the net amount by the VAT rate and adds the tax. To remove VAT, divide the gross amount by one plus the rate; subtracting 20% from a VAT-inclusive amount is not the same calculation.
Example
At 20%, £100 net becomes £120 gross with £20 VAT. Removing 20% VAT from £120 returns £100 net.
Limits
Rate selection is your responsibility. Zero-rated and exempt supplies are different. This single-amount calculation does not decide liability, registration or invoice-line rounding treatment.
Sources
Checked 2026-10-25. Estimate only, not financial advice.