VAT Calculator

Value Added Tax (VAT) is a consumption tax added to the price of most goods and services in the UK, EU, and many other countries. Unlike a simple sales tax that's calculated once at checkout, VAT is designed to be added at each stage of production, though for everyday shopping and invoicing what matters is the final calculation: how much tax sits on top of (or inside) a price. There are two directions people need this calculator for. The first is "adding VAT": you know the net price a business charges before tax, and you need to work out the VAT amount and the gross price the customer actually pays. The formula is straightforward — VAT amount equals the net amount multiplied by the rate, divided by 100. So a service priced at £200 net, with 20% VAT, carries £40 of VAT, bringing the gross total to £240. The second, and more error-prone, direction is "removing VAT": you're handed a gross price — say, a receipt total of £240 — and need to work out how much of that was the original net price and how much was VAT. The common mistake here is to simply subtract 20% of the gross figure (£240 − £48 = £192), which is wrong. Because the 20% rate applies to the net amount, not the gross amount, you have to divide the gross by (1 + rate/100) first. £240 ÷ 1.20 = £200 net, and only then does £240 − £200 = £40 give you the correct VAT amount. This distinction — that 20% of a gross figure is not the same as 20% "inside" a gross figure — trips up even experienced bookkeepers, and it's the single most common VAT calculation error in small business invoicing. A worked example makes the difference concrete. Imagine a freelancer invoices a client for £500 of net work at the UK standard rate of 20%. Adding VAT: £500 × 0.20 = £100 VAT, so the gross invoice total is £600. Now imagine a retailer receives a card payment of £600 for a product and needs to report how much of that was VAT for their quarterly return. Removing VAT: £600 ÷ 1.20 = £500 net, and £600 − £500 = £100 VAT — matching the first example exactly, because they're two sides of the same transaction. VAT rates vary by country and by category of goods — the UK uses a standard rate of 20%, a reduced rate of 5% for some items like home energy, and 0% for essentials like most food and children's clothes. Many EU countries have their own standard rates, commonly between 19% and 27%. Because rates differ so much by jurisdiction and product type, this calculator treats the rate as a free input rather than hardcoding a single country's rules — enter whatever rate applies to your situation, whether that's 20%, 19%, 5%, or anything else. A common misconception is that VAT calculations are symmetric — that adding 20% and then removing 20% gets you back to where you started using the same multiplication or subtraction each way. They're not symmetric in the naive sense: adding VAT multiplies the net by 1.20, while removing VAT divides the gross by 1.20, not by 0.80. Confusing multiplication and division here is exactly how businesses under- or over-report VAT liabilities, so it's worth double-checking which direction you're working in before trusting a figure that's going into an invoice or a tax return.