Free Sales Tax Calculator
Calculate sales tax, GST, or VAT on any amount with two calculation modes. Use Add Tax to compute the total cost including tax from a base net price - perfect for pricing products or estimating final checkout amounts. Use Remove Tax to extract the original pre-tax amount from a gross price - ideal for accounting, expense reconciliation, and tax deduction calculations. Supports any custom tax rate, making it useful across different US state sales tax rates, Canadian GST/HST, UK VAT, Australian GST, Indian GST, and other consumption taxes worldwide. The clear net/tax/gross breakdown helps you understand exactly how much goes to taxes versus the base price.
How to Use
- Enter the amount (net price or gross price depending on mode)
- Set your tax rate as a percentage (e.g., 8.875% for New York City)
- Choose Add Tax or Remove Tax mode
- View the instant breakdown showing net price, tax amount, and gross total
Features
- Add tax to a net price to find the gross total
- Remove tax from a gross price to find the original net
- Custom tax rate input with decimal support
- Clear net, tax, and gross breakdown
Privacy
All calculations happen locally in your browser. No data is transmitted.
Tax Rate Accuracy Notes
This calculator accepts any custom tax rate, which makes it useful for quick checks across many countries and regions. It does not automatically determine your location, product exemption, business registration status, filing duty, or official tax category. Always confirm the current rate with the relevant tax authority before issuing invoices, filing returns, or making business decisions.
Worked Example
For a pre-tax price of 100.00 and a tax rate of 8%, Add Tax gives a tax amount of 8.00 and a gross total of 108.00. If 108.00 already includes 8% tax, Remove Tax gives a net price of 100.00 and a tax portion of 8.00.
Business Disclaimer
Results are estimates for arithmetic verification. They do not determine taxability, exemptions, import duties, reverse charges, filing treatment, or professional accounting requirements.
Last reviewed: July 2026.