VAT Calculator

Worked example

Adding 20% VAT to a net amount of 100 gives VAT of 20 and a gross total of 120.

Removing 20% VAT from a gross (VAT-inclusive) amount of 120 gives a net amount of 100 and VAT of 20. This is not the same as subtracting 20% of 120, which would wrongly give 96: dividing by 1.20 is the correct way to extract VAT that is already included in an amount.

How this works

Add VAT takes a net (VAT-exclusive) amount and calculates the VAT and the resulting gross total: VAT = net × rate ÷ 100, and gross = net + VAT.

VAT Amount uses the same calculation to answer a narrower question: just the VAT on an amount before VAT, since that figure is often what's actually needed without also wanting the gross total.

Remove VAT takes a gross (VAT-inclusive) amount and works backwards to the net amount and the VAT it contained: net = gross ÷ (1 + rate ÷ 100), and VAT = gross − net. This division step is essential. A VAT-inclusive amount cannot be un-VATed by simply subtracting a percentage of the gross figure.

This calculator is an arithmetic aid, not tax advice. VAT rates and rules can change, and the rate that applies may depend on the goods, services and circumstances of a transaction. Check the applicable rate with the relevant tax authority or a qualified tax professional where necessary. Xiliro does not decide which rate legally applies to a transaction, whether a business must register for VAT, or whether VAT can be reclaimed.

Preset rates are shown with the authoritative source and the date they were last checked. A Custom rate is entirely user-provided and is not an official figure. VAT maths here is currency-neutral: amounts are shown as plain numbers, with no currency conversion performed or assumed.