How do you calculate reverse sales tax?

Sales Tax Calculator - Forward & Reverse Tax for All 50 States (2026)

Calculate sales tax and total purchase price across US states, or calculate reverse sales tax to discover the original price before tax was added.

⚙️ Configuration & Inputs

AmountPurchase price

Sales Tax Rate (%)State + local rate

State Tax Rate Presets

📊 Results & Analysis

Total Out-the-Door Price

$162.38

Sales Tax: +$12.38 (8.25%)

Pre-Tax Price	$150.00
Calculated Sales Tax	+$12.38
Reverse Price (If $150 was Total)	$138.57

How Sales Tax is Calculated in the United States

Unlike countries with federal Value-Added Tax (VAT), sales tax in the United States is levied at state, county, and municipal levels. Five states (Alaska, Delaware, Montana, New Hampshire, and Oregon) charge 0% statewide sales tax.

Frequently Asked Questions

To find the original price before sales tax: divide the final total by (1 + Tax Rate decimal). For example, $108 total at 8% tax = $108 / 1.08 = $100 original price.