Calculator to show how to add VAT or to add or increase by a percentage % of a tax onto a price,
or how to get a gross price from a nett or net price.
 How to increase a price by a percentage Method to add a % tax or markup

#### How to add tax to a price

This is the calculation you need to use when:
you know a price before tax (the Net price)
but want to find out the price after tax (the Gross price).

(click here to see a similar calculation for deducting tax)

 If we assume that tax is at a rate of 15%... Net price multiplied by 1.15 = Gross price Price before tax multiplied by 1.15 = Price after tax eg. 150.00 multiplied by 1.15 = 172.50

In the equation above, 1.15 is the multiplier. To get the multiplier, we need to convert the tax rate into a fraction by dividing it by 100 and then add the resulting fraction to 1.

So, if we assume that VAT is at a rate of 15%,
we will need to divide 15 by 100, giving 0.15, then add 1.
Thus the multiplier is 0.15 +1 = 1.15

 So now let's assume that a tax is at a new rate of 20%... First, get the multiplier : 20 / 100 = 0.20 0.20 + 1 = 1.20 The multiplier is 1.20 So... Net price multiplied by 1.20 = Gross price Price before tax multiplied by 1.20 = Price after tax eg : 100 multiplied by 1.20 = 120.00 100 + Tax = 120.00 inc Tax

Click here to see how to deduct a % from a price.
For more information on taxes and Value Added Tax ( vat )
How much do you markup a price to allow for a % discount?
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last modified : 24 th. January 2012

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