What is the average US sales tax rate?

The average combined state and local sales tax rate in the US is about 8.5%, but it varies dramatically by location. Oregon, Montana, New Hampshire, Delaware, and Alaska have no state sales tax. Tennessee has the highest average combined rate at around 9.55%. Always check your specific city and county rate, as local taxes can add 1–4% on top of the state rate.

How do I calculate sales tax on a purchase?

Multiply the pre-tax price by the decimal version of the tax rate. Example: $85 item at 8.5% tax = $85 × 0.085 = $7.23 tax → $92.23 total. Or use this calculator to do it instantly.