Free Online VAT / GST Calculator
Add or remove VAT and GST from prices with clear breakdowns.
Use "Add" when you have a price before tax. Use "Remove" when a price already includes tax and you need the net amount and the tax portion.
About the VAT / GST Calculator
Value-added tax (VAT) and goods and services tax (GST) are consumption taxes added to the price of goods and services. Businesses need to separate the tax from the selling price for invoices, accounting records, and tax returns. This calculator handles both directions: adding tax to a net price and extracting tax from a tax-inclusive gross price.
Add versus remove
When you add tax, the net price is the number you enter and the tax is simply net × rate ÷ 100. The gross price is net plus tax. When you remove tax, the number you enter is already the gross price, so the net price is gross ÷ (1 + rate ÷ 100) and the tax is gross minus net. A common mistake is to subtract the tax rate directly from the gross price; that overstates the tax because the rate applies to the net amount, not the gross amount.
For example, with a 20% rate and a gross price of $120, the net price is $100 and the tax is $20. The tax is 16.7% of the gross price, not 20%. The calculator shows this tax share so you can sanity-check invoices and compare rates across countries.
Frequently asked questions
What rates are common?
Rates vary widely by country and by product category. The presets (5%, 12%, 18%, 20%) cover many common standard and reduced rates, but you can enter any rate your jurisdiction uses.
Is VAT the same as GST?
They are similar consumption taxes with different structures and names. GST is common in Australia, Canada, India, and Singapore, while VAT is used across the European Union and many other countries.
Should my invoice show net or gross?
That depends on local rules and whether you are selling to a business or a consumer. Most tax authorities require the net amount, the rate, the tax amount, and the gross total to be shown separately.