Tax Calculator: Calculate VAT, Sales Tax & Income Tax
Tax calculator online: calculate VAT, sales tax, and income tax with rate presets and reverse calculation from total prices.
Updated 2026-08-16
Related Tools
Loan Calculator: Calculate Monthly Payment & Total Cost
Profit Margin Calculator: Calculate Gross & Net Margin
Percentage Calculator: Increase, Decrease & Ratio Online
Age Calculator: Exact Age by Date of Birth, Years & Days
Barcode Generator: Create Barcodes for Products Online
BMI Calculator: Calculate Body Mass Index & Health Status
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
- Common use cases: business invoices and receipts
- Works for B2B and B2C scenarios
- Works offline after first load
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.
- 7Switch between Add Tax (calculate gross price from net) and Remove Tax (extract net price from gross) modes.
- 8Review the detailed breakdown showing original amount, tax amount, and total amount for complete transparency.
- 9Use the Reset button to clear all fields and start a new calculation with different values.
- 10Business invoicing: enter a net price, pick the VAT preset, and use Add Tax to get the gross amount for the invoice line.
- 11Reconciling a receipt: type the receipt total, choose Remove Tax with your local rate, and read off the pre-tax amount and tax portion separately.
Frequently Asked Questions
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 this calculator up to date with 2026 tax rates?
The calculator applies whatever rate you enter, and its presets are long-stable headline rates (UK VAT 20%, Australia GST 10%, Canada GST 5%, China VAT 13%). When a budget changes a rate, the change lands in the preset list only after an update; so for the current year, check your local tax authority's page and type the new percentage manually. The math is always correct for whatever rate you enter.
Can I use this for Hong Kong or China taxes?
For single-rate scenarios, yes: China VAT (13% goods, 9% services, 1% small-scale taxpayers) and Hong Kong's 16.5% profits tax are flat rates this tool handles directly. Individual income tax (mainland) and Hong Kong salaries tax are progressive with brackets; this calculator applies one rate at a time, so for those, compute each bracket separately or use a dedicated income tax calculator.
How does VAT work for businesses?
VAT (Value Added Tax) is collected at each stage of the supply chain. Businesses charge VAT on their sales and can reclaim VAT on their purchases. The difference is remitted to the tax authority. This calculator helps with customer invoicing. For your own VAT returns, calculate VAT on sales and purchases separately.
What's the difference between tax-exclusive and tax-inclusive pricing?
Tax-exclusive pricing shows the price before tax (common in B2B and US retail). Tax-inclusive pricing shows the price including tax (common in B2C and EU/UK retail). 'Add Tax' converts exclusive to inclusive; 'Remove Tax' converts inclusive to exclusive. Always check which method your context uses.
How do I calculate VAT on a price that already includes VAT?
Use 'Remove Tax' mode. For example, if a price is $120 including 20% VAT: enter $120, set rate to 20%, click Remove Tax. Result: original price = $100, VAT = $20. This is commonly needed for VAT returns where you report the VAT portion separately from the net amount.
What is the difference between standard rate and reduced rate?
Many tax systems have multiple rates: standard rate (e.g., 20% VAT) applies to most goods and services; reduced rate (e.g., 5%) applies to essentials like food, children's clothing, or energy; zero rate (0%) applies to exports or certain necessities. Use this calculator to check each rate's effect on prices.
Can I calculate tax for multiple items with different rates?
This calculator handles one tax rate per calculation. For multiple items with different rates, calculate each item group separately, then sum the results. For example: food items at 5% ($100 × 1.05 = $105), other items at 20% ($200 × 1.20 = $240). Total: $105 + $240 = $345.
Why does my tax calculator result differ between countries for the same amount?
Because every country applies its own rate and base: 100 in the UK with 20% VAT gives 120, the same 100 in Australia with 10% GST gives 110, and in Hong Kong, which has no general sales tax, it stays 100. The tax calculator only does arithmetic on the rate you enter, so it cannot be 'wrong'; check that the rate and the tax-inclusive/exclusive mode match the country you are invoicing for.
Why does my tax calculator hk show no tax for purchases in Hong Kong?
That is correct: Hong Kong has no VAT, GST, or general sales tax on goods and services, so a purchase there has a 0% rate. What Hong Kong does tax are specific items (duty on alcohol and tobacco) and profits tax on businesses (16.5%), which are outside a sales-tax calculator. If a Hong Kong invoice shows a tax line, it is usually a voluntary service charge or a mainland-linked transaction; check the invoice's own breakdown.