Reverse Sales Tax Calculator

Divide the tax-included total by (1 + tax rate as a decimal). For example, a $107.25 total at a 7.25% tax rate gives $107.25 ÷ 1.0725 = $100.00 pre-tax, with $7.25 in tax.

Sales tax in the US combines a state rate with additional county and city rates that vary by exact location — even two addresses in the same city can sometimes fall under different local tax districts. Enter your exact combined rate (shown on your receipt) for a precise result, or use the state base-rate presets as a rough starting point.

Alaska, Delaware, Montana, New Hampshire, and Oregon have no statewide sales tax. Alaska does allow local municipalities to charge their own sales tax, so a purchase there may still include tax depending on the city.

No — a regular sales tax calculator adds tax to a known pre-tax price. This calculator works backward: you already have the final total (e.g., from a receipt or a rounded price), and it extracts what portion was tax and what the original price was before tax.