Sales Tax Calculator

Calculate total purchase price with sales tax added, or reverse-calculate to find the pre-tax price from a final receipt total.

8.25% Sales Tax Applied Added to Pre-tax

Final Total with Tax

$162.38

Final checkout / receipt total

Sales Tax Amount

$12.38

Pre-Tax Net Price: $150.00

Cost Distribution 92.4% Net • 7.6% Tax

Itemized Receipt Summary

Pre-Tax Amount $150.00

Sales Tax (8.25%) +$12.38

Total Purchase Price $162.38

Understanding Sales Tax Calculations

Sales tax is a consumption tax levied by state, municipal, and regional authorities on the sale of retail goods and services. In the United States, sales tax is typically added at checkout rather than baked into the sticker price.

The Mathematics of Sales Tax

To Add Sales Tax: Total = Pre-tax Price × (1 + Tax Rate / 100)

To Find Tax Amount: Tax = Pre-tax Price × (Tax Rate / 100)

To Reverse Tax (From Receipt): Pre-tax Price = Total ÷ (1 + Tax Rate / 100)

Common US State Combined Sales Tax Rates

Combined rates include state-level, county-level, and local municipality sales taxes:

California 7.25% – 10.75%

Texas 6.25% – 8.25%

New York 4.00% – 8.875%

Florida 6.00% – 7.50%

Understanding your calculation

Method, example and limitations

How the calculation works

Sales tax applies a percentage to the taxable amount. For a tax-exclusive price, tax = price × rate; the total adds that tax to the original price.

Example to check

A $100 taxable purchase with an 8% rate produces $8 tax and a $108 total. For a tax-inclusive $108 price at that rate, the pre-tax amount is $100.

Before using the result

Real purchases can contain exempt goods, differing local rates or special fee rules. Check whether the input includes tax before extracting or adding it.

Calculation methodology · Report a result that needs review