GST / VAT Calculator
Add GST or VAT to a price, or remove it from a tax-inclusive price, at any rate.
- Tax amount
- $10.00
- Price excluding tax
- $100.00
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How to use the GST / VAT calculator
- Choose "Add tax" if your amount excludes tax, or "Remove tax" if it already includes tax.
- Enter the amount and your tax rate.
- Read the price including tax, the price excluding tax and the tax amount.
GST / VAT formula
To remove tax, divide by 1 plus the rate. Do not subtract the rate from the gross price, which gives the wrong answer.
Example
At a 10% rate, a net price of 100 plus tax is 110, with 10 tax. To remove 10% tax from 110, divide by 1.1 to get 100.
Common GST and VAT rates
Standard rates differ by country: for example 10% GST in Australia, 15% in New Zealand, 9% in Singapore, and VAT rates of around 17–27% across Europe, such as 20% in the UK. Many countries also have reduced rates, so always check the current rate for your product.
Why removing tax trips people up
Taking 10% off a tax-inclusive price of 110 gives 99, not 100, because the tax was calculated on the net price. The correct way is to divide by 1.1. This calculator does that for you.
Frequently asked questions
How do I add GST or VAT to a price?
Multiply the net price by 1 plus the tax rate. At 20%, 50 becomes 60.
How do I remove GST or VAT from a price?
Divide the gross price by 1 plus the tax rate. At 10%, 110 becomes 100.
Is GST the same as VAT?
They work the same way: a tax added at each stage of sale. The name depends on the country.
Does this work for US sales tax?
Yes for the math. Enter your combined state and local rate.
Where do I find my tax rate?
Check your country's tax authority website, since rates vary and can change.
GST and VAT by country
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