Sales Tax Calculator: Add or Remove Tax, VAT and GST
This sales tax calculator adds tax to a price or takes it out of a total that already includes it. Use it for US state and city sales tax, VAT in the UK and Europe, GST in India, Australia, Canada and New Zealand, or any other rate.
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Quick answer: To add tax, multiply the price by 1 + rate ÷ 100: $100 at 8.25% is $108.25. To remove tax from a total, divide by the same number: $108.25 ÷ 1.0825 = $100. Do not just subtract 8.25% of the total, which gives the wrong answer.
How to use the sales tax calculator
- Enter the amount and the tax rate, or tap a preset for a common rate.
- Choose whether the amount is before tax (a US shelf price or a net invoice) or including tax (a receipt total, or a UK, EU, Indian or Australian shelf price).
- Read the price before tax, the tax and the total. Click Copy breakdown for an invoice or expense claim.
Common sales tax, VAT and GST rates
| Place | Standard rate | Notes |
|---|---|---|
| United States | 0% to about 10% | Set by states, counties and cities. California’s state rate is 7.25%; local taxes add more. |
| United Kingdom | 20% VAT | Reduced 5% and zero rates for some goods. |
| Germany / France | 19% / 20% VAT | EU countries range from 17% to 27%. |
| India | 5% and 18% GST | Since September 2025, with 40% for luxury and sin goods. Split into CGST and SGST within a state. |
| Canada | 5% GST | Some provinces add PST or use a combined HST of 13% to 15%. |
| Australia / New Zealand | 10% / 15% GST | Included in shelf prices. |
Rates change, so check your local tax authority for the current figure before filing anything.
Why removing tax needs division
Tax is a percentage of the price before tax, not of the total. If a total of $120 includes 20% VAT, the price before tax is $120 ÷ 1.20 = $100 and the VAT is $20. Taking 20% of $120 would give $24, which is too much. This is the most common mistake in VAT and GST maths, and the calculator always does it the right way.
Shopping a sale? The discount calculator applies a percent off and then tax. For tips on a restaurant bill, use the tip calculator.
FAQ
How do I find the tax rate from a receipt?
Divide the tax by the price before tax and multiply by 100. $6.60 tax on $80 is 8.25%.
What is the formula for reverse sales tax?
Price before tax = total ÷ (1 + rate ÷ 100).
Is this tax advice?
No. It is a calculator for estimates. For filing, follow your tax authority or accountant.
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