PAY, TAX, DEBT, AND HOUSEHOLD PLANNING
Reverse Sales Tax Calculator
Back out estimated sales tax from a tax-included price and a combined rate you enter.
Review your result
Your result
Ready when you are.
Enter your values and select Calculate. Your result stays on this device.
How it works
Price before tax = tax-included price ÷ (1 + rate).
Assumptions
Use the current combined rate for the transaction. Product, location, and exemption rules can change the result.
Use case
reverse sales tax calculator: a clear planning check
Back out estimated sales tax from a tax-included price and a combined rate you enter. The stated formula, assumptions, and result limits remain visible so the calculation can be checked in context.
Use a clear reverse sales tax calculator scenario with values you can verify before relying on the result.
Method and update
Last reviewed: 2026-08-10. This tool performs the stated formula locally in your browser using the values you enter.
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