UK VAT calculator

Add VAT to a net price or remove VAT from a total. See the net amount, VAT and gross amount together.

Discuss your needs

Use the tool

Check your VAT amount.

Your entries stay in this page. No account needed.

What would you like to calculate?

Use pounds and pence, for example 100 or 1,250.50. Maximum £999,999,999.99.

Check the rate for your goods or services before you calculate.

Your calculation

Enter an amount and select Calculate VAT.

01 / Your next step

How the calculation works

To add VAT, multiply the price before VAT by the rate, then add the VAT to that price. At 20%, £100 becomes £120: £100 net plus £20 VAT.

To remove VAT, divide the total by 1 plus the rate expressed as a decimal. At 20%, divide by 1.20. A £120 total contains £20 VAT, not £24.

This calculator rounds VAT to the nearest penny for one amount. It keeps net plus VAT equal to the gross total. Invoice systems can apply rounding per line, so small differences are possible.

02 / Your next step

Check the VAT rate first

The UK standard rate is 20%, the reduced rate is 5%, and the zero rate is 0%. The right treatment depends on the goods or services. Check the GOV.UK VAT rates before choosing.

Zero-rated and exempt supplies have different VAT treatment. A 0% calculation cannot classify a supply. This tool does not decide registration, recoverable VAT, special scheme calculations or the entries on a VAT return.

For help preparing a return, see our VAT accounting service. If the transaction records need attention, start with bookkeeping support.

03 / Your next step

Use the result with your records

Keep the supplier invoice or sales record alongside your calculation. Check whether the original amount includes VAT before you compare figures.

Our bookkeeping and accounting guide explains how transaction records support later work. The fees page lists the details needed for a quote.

For a VAT query, tell us the period and task involved. Keep tax references and financial documents out of the first enquiry.

04 / Your next step

Sources and calculation limits

Rate reference checked on 21 October 2026: GOV.UK VAT rates. Rounding reference: HMRC VAT Notice 700, section 17.

The result is a calculation using your chosen rate. Confirm the tax treatment before using it on an invoice or return.

Questions

Before you enquire.

Divide the VAT-inclusive total by 1.20 to find the net amount. The difference between the total and net amount is the VAT. For £120, the net is £100 and the VAT is £20.
No. Select the rate after checking the goods or services involved. The tool performs the arithmetic for the rate you select.
The calculator runs in your browser. It does not send or save the amounts you enter.
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