Sales Tax Calculator

Total Price = Pre-Tax Price × (1 + Tax Rate)

Example: A $50.00 purchase with an 8% sales tax incurs $4.00 in tax, leading to a total receipt of $54.00.

Find tax amounts for business expenses or shopping receipts. Switch between forward (add tax) and reverse (remove tax) modes using the interactive widget below.

Interactive Sales Tax Calculator

Pre-Tax Amount ($)

Sales Tax Rate (%)

Tax Amount (Added) $7.00

Total Price $107.00

Adding Sales Tax

When shopping, retail items display net prices. To find the total price at checkout:

Total = Pre-Tax Price × (1 + (Tax Rate / 100))

Example: A $20 book with a 6% tax rate will end up costing $20 × 1.06 = $21.20.

Removing Sales Tax (Reverse)

If you have a receipt with the total amount paid, you can isolate the original price before taxes were added:

Pre-Tax = Total / (1 + (Tax Rate / 100))

Example: If you paid a total of $107 with a 7% tax rate, the base price is $107 / 1.07 = $100.00, meaning you paid $7.00 in sales tax.

Related Finance Tools

Simple Interest Calculator Compound Interest Calculator Discount Calculator Salary to Hourly Converter

Frequently Asked Questions

How do you calculate sales tax?

To calculate sales tax on an item, multiply the pre-tax price by the tax rate in decimal form: Sales Tax = Pre-Tax Price × (Tax Rate / 100). The total price is the pre-tax price plus the sales tax.

How do you remove sales tax from a total price (reverse tax)?

To calculate the pre-tax price from a total price, divide the total price by 1 plus the tax rate (in decimal form): Pre-Tax Price = Total Price / (1 + (Tax Rate / 100)).