How To Find Tax Amount From Total?

Determine the tax rate as a decimal

Divide the total by 1 plus the tax rate to find the pre-tax amount

Subtract the pre-tax amount from the total to get the tax amount

Formula: Tax Amount = Total – (Total ÷ (1 + Tax Rate))

Example: If total is 110 and tax rate is 10%, tax amount = 110 – (110 ÷ 1.10) = 10