Sales Tax Calculator

Add sales tax to a price, take it out of a total, or find the tax rate from the before and after prices.

Price after tax

$108.25

Price before tax: $100.00
Sales tax rate: 8.25%
Sales tax amount: $8.25
Price after tax: $108.25

Price vs. tax

Price before tax 92.4%
Sales tax 7.6%

Results are estimates and not financial advice.

About the sales tax calculator

Sales tax is a percentage added to the price of goods and services. Use Add Tax to get the total you will pay, Remove Tax to work backwards from a total that already includes tax, and Find Rate to discover the tax rate from a before-tax and an after-tax price.

The same math works for VAT and GST. Rates differ by place, so check the current rate for your location.

Formula

After tax = Before tax × (1 + rate ÷ 100)
Before tax = After tax ÷ (1 + rate ÷ 100)
Rate = (After tax ÷ Before tax − 1) × 100

Example

A $100 item with 8.25% sales tax costs $108.25: $8.25 of tax is added. Going backwards, a $108.25 total at 8.25% contains a $100 price.