Multiply the pre-tax price by the tax rate, then add that amount to the pre-tax price.

Example: $100 item at 8% → Tax = $8.00 → Total = $108.00

Divide the total price by (1 + rate/100). This strips sales tax out of a receipt total.

Example: Total $108 at 8% → Pre-tax = $108 ÷ 1.08 = $100.00 → Tax = $8.00

Sales tax can include state, county, city, and special district taxes stacked together. The state rate alone may differ from the checkout rate because local governments add their own taxes. For exact purchases, use the rate for the sale location or delivery address.

Use the combined state + local rate when estimating what a customer pays at checkout. Use only the state rate when you specifically need the statewide base. If you know the exact city, county, or ZIP rate, enter it manually for the most accurate result.

No. Alaska, Delaware, Montana, New Hampshire, and Oregon have no general statewide sales tax. However, local taxes, excise taxes, or special product taxes may still apply in some of these places.

Sales tax is usually calculated after discounts are applied, because the discounted price is the amount being paid. Rules can vary for coupons, rebates, and special promotions depending on state law.

No. Groceries, clothing, medicine, prepared food, digital products, and services may be taxed differently depending on the state and locality. Use the manual rate field when a product-specific rate applies.