Sales Tax Rate Calculator

Enter the original price and total paid to calculate the implied sales tax amount and rate.

Before-tax price

Total paid after tax

—Implied tax rate

—Tax amount

—Total multiplier

—Price difference

An implied rate is not always a statutory rate

Fees, discounts, tips, shipping or other charges can make the percentage implied by two totals differ from the legal tax rate.

How to use the Sales Tax Rate Calculator

Enter the known price before tax and the final amount after tax. The tool divides the difference by the before-tax price to calculate the implied percentage.

What the result means

The result is the effective tax percentage implied by the two amounts.

Practical tips and limits

If fees, tips, shipping, discounts, or non-tax charges are included in the final amount, the implied percentage is not necessarily a statutory sales tax rate.