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Guide type: Compare options

Price With vs Without Tax: Work Forwards and Backwards

Learn the correct forward formula to add tax and the reverse formula to remove tax from a total price.

Updated 2026-04-04Author: CalcDock TeamReviewed by: CalcDock Team

This guide is for educational purposes and is not financial, legal, or medical advice.

Forward (add tax)

Total = Net × (1 + rate).

Reverse (back out tax)

Net = Total ÷ (1 + rate). Do not subtract the rate from the total — that gives the wrong base.

When totals include service fees

If service fees are taxable, include them in the base before applying the rate.

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