How Much Will VAT Cost Me?

To find out how to do this calculation yourself see the section called "How to Calculate How Much VAT Will Cost" below.

Note: don't include anything other than numbers and a decimal point. For instance don't enter one thousand pounds like this "£1,000.00" enter it like this "1000.00".

Amount: £

VAT Rate: %

Check to round result to nearest penny:

How Much VAT Have I Paid?

To find out how to do this calculation yourself see the section called "How to Calculate How Much VAT Has Cost" below.

Note: don't include anything other than numbers and a decimal point. For instance don't enter one thousand pounds like this "£1,000.00" enter it like this "1000.00".

Amount: £

VAT Rate: %

Check to round result to nearest penny:

How to Calculate How Much VAT Will Cost

Use this calculator to find out how much VAT will be levied a given amount. The current normal rate of VAT in the United Kingdom is 17.5%. There are two ways to calculate the amount something will cost when VAT has been added. Lets assume that an item costs £72.33 excluding VAT and the VAT rate is 17.5%. The first method:

( [VAT Rate] / 100 ) * [Original Price] = [Amount of VAT Payable]
for example			
( 17.5 / 100 ) * 72.33 = 12.66 (rounded)
to get the final price add £12.66 to £72.33 to get £84.99

The second method calculates the final value in one step. Neither method is better so use whichever is most convenient. The second method:

( ( [VAT Rate] + 100 ) / 100 ) * [Original Price] = [Total Price Including VAT]
for example
( ( 17.5 + 100 ) / 100 ) * 72.33 = 84.99 (rounded)
to recover the portion of the final value that is VAT 
subtract the original value from the final value. 
e.g. £84.99 - £72.33 = £12.66

How to Calculate How Much VAT Has Cost

Use this calculator to work out how much VAT has been / will be paid on a given purchase. Note that you can't simply work out 17.5% of the final value and use that figure as it will be to high. For the example below assume that a left handed widget worth £84.99 is being purchased and the VAT rate is 17.5%. You work out how much VAT is being paid like this:

( 100 / ( 100 + [VAT Rate] ) * [Final Price] = [Pre-VAT Price]
for example
( 100 / ( 100 + 17.5 ) ) * 84.99 = 72.33 (rounded)

Notes

Neither of these calculators utilize pure decimal mathematics and therefore in some very rare situations the result may be off by 1p. This situation is very rare and somewhat academic.