How to Calculate VAT in Math’s

Value Added Tax (VAT) is a tax levied on the final consumption of goods or services within a country. It’s generally applied to all products that are purchased, but there are some exceptions. It can be tricky to figure out how much VAT you need to pay. Luckily, with the right formula, calculating VAT in maths doesn’t have to be complicated! Let’s explore how you can use maths to calculate VAT.

Understanding the Formula for Calculating VAT

The basic formula for calculating VAT is as follows:

Amount + (Amount x Rate) = Total with VAT.

This formula assumes that the amount given is already inclusive of any taxes or fees. For example, if you’re buying something for £50 and it has a 15% VAT rate, then your calculation would look like this:

50 + (50 x 0.15) = 57.5.

This means that your total cost including VAT would be £57.50.

If the amount given does not include any taxes or fees, then you will need to adjust the formula slightly. The new equation should look like this:

Amount + (Amount x Rate / 100) = Total with VAT.

So let’s say you wanted to buy something for £50 with a 20% tax rate; your equation would look like this:

50 + (50 X 0.20 / 100) = 60.

In this case, your total cost including tax would be £60.

It’s important to note that different countries may have different rules when it comes to calculating and paying taxes such as VAT – so always be sure to check the laws of your region before beginning any calculations! Additionally, some countries may also have additional taxes or fees that must be taken into account when calculating the total price of purchase – so make sure you research these as well before starting any calculations!


Calculating value-added tax may seem intimidating at first glance – but with the right formula, it doesn’t have to be complicated! By understanding how the equation works and making sure you adjust it correctly according to whether any taxes or fees are included in the amount given or not, you can easily calculate how much value-added tax needs paid on any purchase – meaning business owners and students alike can save time and money by getting their maths calculations correct from the start!

Leave a Comment