Reverse Sales Tax Calculator

$5.00 + 22% tax= $4.10 Original Price (before tax)

See exactly how we calculated the pre-tax price from your tax-inclusive amount. Our step-by-step breakdown shows the precise mathematics behind removing sales tax from a total price.

Quick Reference

Final Price (with tax)$5.00

Tax Rate (%)22%

Tax Amount$0.90

Original Price (before tax)$4.10

Calculation Steps

Final price with tax: $5.00

Convert tax rate to decimal: 22% ÷ 100 = 0.220

Calculate divisor (1 + tax rate): 1 + 0.220 = 1.220

Divide final price by divisor: $5.00 ÷ 1.220 = $4.10

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How It Works

To find the original price before tax, divide the tax-inclusive amount by (1 + tax rate as decimal). This calculator handles the math for you, showing each step of the process.

The Formula

Original Price = Final Price ÷ (1 + Tax Rate%/100)

Example Calculation

For a final price of $5.00 with 22% tax rate, divide $5.00 by (1 + 22/100) to get the original price of $4.10. The tax amount is $0.90.