Sales tax calculator
Enter a price and a tax rate to add tax on top, or switch to "remove tax" to split a receipt total into the net amount and the tax it already contains.
Result
- Total with tax
- $108.00
- Price before tax
- $100.00
- Tax
- $8.00
- Formula
$100.00 × 8% = $8.00 $100.00 + $8.00 = $108.00
How to use this tool
- Choose whether your amount is before tax or already includes tax.
- Enter the amount and your local sales tax rate.
- Read the pre-tax price, the tax and the total; the formula shows how they connect.
- Copy the headline figure for invoices, expense claims or receipts.
Good to know
- Removing tax divides by (1 + rate); it does not subtract the rate percentage from the total.
- The rates in the examples are illustrative; always check the current rate for your location.
Frequently asked questions
How do I add sales tax to a price?
Multiply the price by the tax rate divided by 100 and add the result. For $100 at 8% the tax is 100 × 0.08 = $8.00 and the total is $108.00. You can do it in one step by multiplying the price by 1.08, and the formula line shows both steps for your own rate.
How do I remove tax from a total that already includes it?
Divide the total by (1 + rate ÷ 100). A $108.00 receipt at 8% tax has a pre-tax price of 108 ÷ 1.08 = $100.00, and the tax is the difference, $8.00. Do not multiply the total by 8%: that overstates the tax because the rate applies to the pre-tax price, not to the total.
Which rate should I enter?
Use the combined rate that applies where the sale happens: state plus county, city and any district taxes. In the United States combined rates range from 0% to over 10%, and some goods such as groceries or clothing may be exempt or taxed at a reduced rate, so check your receipt or local tax authority.
Does this work for VAT or GST?
Yes. VAT and GST are percentage taxes calculated the same way, and the remove mode is exactly what you need to extract VAT from a gross invoice total. Enter the rate for your country, for example 20% for the UK, 19% for Germany or 10% for Australia and Korea.
How is rounding handled?
Results are shown to the cent, but the arithmetic is done with full precision and the tax is calculated as the difference between the total and the net amount. Retailers round each line item separately, so a long receipt can differ from the calculator by a cent or two.
Results are estimates for general information. Double-check anything important with an official source.