How to Calculate Sales Tax
Sales tax is a consumption tax added to the purchase price of goods and services at the point of sale. Rates vary by state and locality.
The Formula
Total Price = Price x (1 + Tax Rate / 100)Where:
TotalTotal Price — Final price including sales taxPricePre-Tax Price — Item price before tax appliedRateTax Rate — Combined state and local tax rateStep-by-Step Example
Here's how to calculate sales tax step by step:
- 1Find your tax rate: Look up your combined state and local sales tax rate.
- 2Convert to decimal: Divide the tax rate by 100.
- 3Calculate total: Multiply the item price by (1 + tax rate decimal) for the final price.
Following these 3 steps gives you the final sales tax value.
Skip the Math
A $500 TV with an 8.25% sales tax: tax = $500 x 0.0825 = $41.25, total = $541.25.
Use the Free CalculatorWhy You Need This Calculation
- Calculating sales tax helps you budget accurately and understand the true cost of purchases.
Common Mistakes
Using only the state rate.
Include city and county rates for the correct combined rate.
Assuming all items are taxed.
Many states exempt groceries, medicine, and clothing from sales tax.
Forgetting online purchases may have tax.
Most states now require sales tax on online purchases.