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    Tax · Free tool

    Sales Tax Calculator

    Add sales tax to a price, or work backward from a tax-inclusive total to find the pre-tax amount.

    Tax forms, calculator, and dollar bills illustration
    100% free, no signup
    Aligned with IRS guidance
    Instant results in-browser
    Reviewed by real accountants
    The Calculator

    Run the numbers

    $
    %
    Pre-tax amount 00.00
    Sales tax$8.31
    Total with tax 08.31

    How it works

    Sales tax rate = state + county + city + special district. In Denver, the combined rate averages around 8.31%. Rates change by street address, not ZIP code, so a rooftop lookup is required for compliance-grade calculations.

    For accounting, reverse calculation matters: cash-basis retailers often deposit tax-inclusive totals and need to split the sale from the liability every month.

    Examples

    Denver retail sale of 00

    Tax at 8.31% = $8.31. Customer pays 08.31; you remit $8.31 to the state and city.

    Reverse from a $500 receipt

    At 8.31%, pre-tax is $461.64 and tax is $38.36.

    Frequently asked questions

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