PennyCompass

UK VAT Calculator

Free UK VAT calculator. Add or extract 20% (or 5% reduced rate) Value Added Tax from any amount.

Published

UK VAT inclusive or exclusive.

Total with VAT

Pre-VAT (net)

VAT

Your breakdown

Updates live as you type
Item Amount

Worked example

Take a net price of £100 at the 20 percent standard rate in add-VAT mode, the usual case when a business quotes a price before tax. VAT is £100 times 20 percent, which is £20, so the total the customer pays is £120. Working the other way, if £120 is already VAT-inclusive, you divide by 1.20 to recover the £100 net, and the £20 difference is the VAT element. The key point is that the 20 percent is always applied to the net figure, not the gross, so to extract VAT you divide rather than multiply.

How it is calculated

VAT is a percentage added to the net value of goods or services, charged at 20 percent standard, 5 percent reduced, or 0 percent zero rates depending on the item. In add-VAT mode the calculator multiplies the net amount by the rate and adds it on to get the gross. In extract mode it assumes the figure already includes VAT, so it divides by one plus the rate to recover the net, and the remainder is the VAT element. At 20 percent the VAT inside a gross price is always one sixth of that total, a useful mental shortcut. Businesses with VAT-taxable turnover above £90,000 in any rolling twelve months must register and charge VAT, though voluntary registration is allowed below that and can help when customers are themselves VAT-registered.

Frequently asked questions

VAT registration threshold?
Mandatory registration if VAT-taxable turnover exceeds £90,000 (2024 onwards) in any rolling 12-month period. Voluntary registration is available below threshold and can be advantageous when most customers are VAT-registered businesses.
What is the difference between VAT-inclusive and VAT-exclusive prices?
A VAT-exclusive price (also called the net price) is the amount before VAT is added. A VAT-inclusive price (the gross price) already contains VAT within it. To extract the VAT from a gross price, divide by one plus the rate, so for the 20% rate you divide by 1.20 and the remainder is the VAT element.
Which goods and services are zero-rated or exempt from UK VAT?
Zero-rated items include most food, children's clothing, books, and passenger transport; you still charge VAT at 0% and can reclaim input tax. Exempt supplies, such as most financial services, insurance, and private education, fall outside the VAT system entirely, meaning you cannot reclaim input tax on costs related to them.
Can I reclaim VAT on business purchases?
Yes, VAT-registered businesses can reclaim input VAT paid on goods and services used for taxable business purposes. The reclaim is made through the quarterly or monthly VAT return submitted to HMRC, and you must hold a valid VAT invoice from the supplier as evidence.

Related calculators

Sources

  1. HMRC — Income Tax Rates and Personal Allowances 2026/27, HM Revenue & Customs
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