How to calculate UK VAT Backwards – vat online calculator Guide


A website’s admin area often requires you to enter your prices without VAT if you manage an online shop.

You may want to display a ’rounded price’ on your website to make it easier for your customers to see (e.g. £20.00, £25.00, or £100.00).

It may also be a good idea to include VAT in this price.

Calculate the VAT portion of your purchase with the Vat Calculator by adding a tidy rounded figure.

Using this method, you can create e-commerce websites with ‘clean prices’.

Your shop will display a neat and clean ‘VAT-inclusive’ price on the front end once the price is added.

On your website, your customer will see an itemized price that includes VAT.

How to use the VAT Calculator

On vatonlinecalculator It’s as simple as entering the amount to work with, selecting whether VAT is already included, and you’re done! You can calculate VAT forwards or backwards.

To show the figure as VAT included or VAT excluded, select the ‘Does this include VAT?’ Select whether VAT is included or excluded from the figure.

How to manually remove VAT

The gross amount should be divided by (1 + VAT%)

Divide 20% by 1.20 to get the VAT rate


£83.33 is the result of dividing £100.00 by 1.20

From £100.00, subtract £83.33 to get £16.67

A £100.00 item has a VAT amount of £16.67.

You will see that this sum is accurate if you use the VAT Calculator online.

You can use the VAT Calculator to:

  • VAT should be calculated.
  • Subtract VAT from a figure.
  • Calculate VAT on a price or figure.
  • A product’s or service’s VAT inclusive price should be calculated.
  • From the gross, calculate the VAT.
  • By adding 20% to £1.00, you can get £1.20. By removing VAT, you can get £0.80.
  • Calculate a number’s VAT content, which is inclusive of VAT.
  • VAT should be calculated backwards.
  • A price’s VAT element can be calculated.
  • A VAT-inclusive product or service’s price is calculated by taking the total price into account.
  • Get 20% off any price or number.
  • VAT can be added or subtracted from a number.
  • Reverse the sales tax calculation.
  • Using 20% VAT content, show how to calculate it
  • How to get a number that excludes VAT from a number that includes VAT

How Do work out VAT on a price?

The price excluding VAT should be multiplied by 1.2 to get a price including VAT (20%).

To Calculate the price including VAT (5%), then multiply it by 1.05 to get the price excluding VAT

How is VAT calculated? Is it net or gross?

Gross figures are calculated by adding the VAT percentage to the net amount when VAT is calculated on a net figure.

The addition of 20% VAT is a straightforward calculation, but the reverse VAT calculation can be challenging

By multiplying 1.2 by 20%, you can add 20% VAT to any price.

The VAT rate of 20% is calculated by multiplying £100.00 by 1.2, which results in £120.00.

Taking 20% of £120.00 (which leaves £96.00) doesn’t give you the VAT portion of £120.00.

There is a difference between adding 20% and removing 20%

It is not always easy to calculate VAT ‘backwards’ – meaning you can’t simply subtract 20% from the VAT included price in order to figure the VAT portion.

Here is a handy VAT calculator that calculates VAT in a number of ways, including ‘backwards’ or ‘forwards’ and ‘reverse’.

How does VAT Work?

VAT registration entails charging an additional 20% on all sales (or the applicable VAT rate), when the invoice is paid, the VAT deduction is made. As a business, you are required to pay your VAT return to HMRC every 3 months, and before you do so, you will take away any VAT that is due to your suppliers.