What's the difference between 'Add Tax' and 'Remove Tax'?

'Add Tax' calculates the final price including tax from a pre-tax amount. 'Remove Tax' does the reverse: it takes a tax-inclusive price and calculates the original pre-tax amount. Use 'Remove Tax' when you have a receipt showing the total and want to know the pre-tax price.

What tax rates should I use?

Common rates: UK VAT 20%, EU VAT 15-27% (varies by country), US Sales Tax 0-10% (varies by state), Australia GST 10%, Canada GST 5%. Check your local regulations for the correct rate. The calculator supports any rate from 0% to 100%.

How does reverse tax calculation work?

For a tax-inclusive amount A with tax rate R, the original amount = A / (1 + R/100). For example, $120 with 20% VAT: $120 / 1.20 = $100. The tax amount is then $120 - $100 = $20.

Can I use this for income tax?

Yes, but income tax is often progressive (different rates for different income brackets). This calculator applies a single flat rate. For simple income tax calculations or flat-tax systems, it works perfectly. For progressive tax, calculate each bracket separately.

Why is my calculated tax different from my invoice?

Possible reasons: Rounding differences (some systems round at different stages), compound taxes (some regions apply multiple taxes), or tax-inclusive vs tax-exclusive pricing. Check your invoice details and ensure you're using the correct calculation mode.

Is my financial data sent to a server?

No. All calculations happen entirely in your browser using JavaScript. Your amounts and tax rates are never transmitted over the network. The tool works offline after the page loads.

Tools

Amount

Tax Rate (%)

Common Tax Rates

Original Amount

$100.00

Tax Amount

$20.00

20.0%

Final Amount

$120.00

Tax Calculator — Calculate VAT, Sales Tax & Income Tax

Free tax calculator for VAT, sales tax, and income tax calculations. Add or remove tax from amounts. Supports multiple tax rates and reverse calculations. Instant results with breakdown. All calculations run locally in your browser.

Features

✓Add tax to an amount (calculate tax-inclusive price)
✓Remove tax from an amount (reverse calculate original price)
✓Support any tax rate (VAT, GST, sales tax, income tax)
✓Instant calculation as you type
✓Clear breakdown showing original, tax, and final amounts
✓Common tax rate presets for quick selection
✓Perfect for business invoices and receipts
✓Works for B2B and B2C scenarios
✓All calculations run locally in your browser
✓No data sent to server — your financial data stays private

How to Use

1Enter the amount in the input field.
2Enter the tax rate (e.g., 20 for 20% VAT).
3Choose 'Add Tax' to calculate the price including tax.
4Choose 'Remove Tax' to reverse calculate from a tax-inclusive price.
5View instant results with breakdown.
6Use presets for common tax rates in your region.

Frequently Asked Questions

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