Estimate sales tax and final purchase total using a state rate, local rate, and optional discount.
Enter a purchase amount and sales tax rate to estimate your total.
Estimate only. Actual sales tax may vary by location, item type, exemption, and local rules.
Sales Tax Guide
This calculator estimates sales tax by applying a combined tax rate to the taxable purchase amount. You can enter a state sales tax rate, local or additional tax rate, and optional discount to estimate the final purchase total.
The taxable amount is the purchase amount after subtracting the discount amount entered. This calculator applies the tax rate to that taxable amount.
The combined rate is the state sales tax rate plus any local, city, county, or additional rate you enter.
The final total is the taxable amount plus the estimated sales tax. Actual totals may vary depending on local rules and item exemptions.
Sales tax is a tax applied to certain purchases. The rate can vary by state, city, county, district, and item type.
No. This version uses the rates you enter. That helps keep the calculator flexible because sales tax rates can vary by exact location.
A combined sales tax rate is the total of the state rate plus any local or additional rates that apply to the purchase.
No. Some items may be exempt, partially exempt, or taxed differently depending on the state and local rules. Examples may include groceries, medicine, clothing, or services.
No. This calculator is for educational estimates only. Businesses should use official state and local tax guidance, tax software, or a qualified tax professional.
Last updated: April 2026