U.S. sales tax is charged at the register on top of the shelf price, with combined state and local rates from 0% (in Delaware, Montana, New Hampshire and Oregon) to over 10%. Type into any result to work backwards.
How to use the Sales Tax Calculator
- Net price (before tax)
- Sales tax rate
- Every result field is editable: type into Gross price (with tax) and Net price (before tax) plus every other field update to match.
Results update as you type, and every field accepts the units shown in its menu.
How it works
Enter the net (pre-tax) price and the sales tax rate. Type a total price into the gross price to remove the tax.
Tips
- Tax figures here are estimates for planning – your actual tax depends on credits, deductions and local rules.
- Check the tax year and filing status before you rely on a result.
- Use gross (before-tax) figures unless a field asks for take-home pay.
- When in doubt, confirm with the tax authority’s own calculator or a tax professional.
Common mistakes to avoid
- Confusing marginal and effective tax rates.
- Adding sales tax to a price that already includes it.
- Forgetting payroll taxes (Social Security and Medicare) on wages.
Inputs explained
| Field | What to enter |
|---|---|
| Net price (before tax) | Amount in your currency |
| Sales tax rate | In % |
What each result means
- Tax amount = [Net price (before tax)]×[Sales tax rate]÷100
- Gross price (with tax) = [Net price (before tax)]×(1 + [Sales tax rate]÷100)
Example values
How the main result changes when Net price changes and everything else stays at the example values above:
| Net price (before tax) | Gross price (with tax) |
|---|---|
| 50 | 54.13 |
| 75 | 81.19 |
| 100 | 108.25 |
| 125 | 135.31 |
| 150 | 162.38 |
| 200 | 216.5 |
Formula
Gross price = net price × (1 + rate)Net price = gross price ÷ (1 + rate)Tax rate = (gross − net) ÷ netWorked example
Inputs — Net price (before tax): $100; Sales tax rate: 8.25 %.
Results — Tax amount = $8.25; Gross price (with tax) = $108.25.
Frequently asked questions
How do I calculate sales tax?
Price × tax rate; add it to the price for the total.
How do I remove sales tax from a total?
Divide by (1 + rate) – or type the total into the gross price.
Which states have no sales tax?
Alaska (state level), Delaware, Montana, New Hampshire and Oregon.
What formula does the Sales Tax Calculator use?
Gross price = net price × (1 + rate).