Reverse Sales Tax Calculator
Know the total you paid? Back out the pre-tax price with total ÷ (1 + rate).
Tax-inclusive total
Results
Pre-tax price
Formula: pretax = total ÷ (1 + rate). Example: $109.03 ÷ 1.0903 ≈ $100.00 at 9.03%.
Estimates only — not tax advice. Confirm the rate on your receipt before relying on this figure.
A reverse sales tax calculator solves for the shelf price when your receipt only shows the tax-inclusive total—handy for reimbursements, wholesale checks, and “what was the sticker price?” questions.
Formula
Pre-tax price = total with tax ÷ (1 + sales tax rate). If the rate is 9.03% (0.0903) and you paid $109.03, then $109.03 ÷ 1.0903 ≈ $100.00 before tax, with about $9.03 of tax.
When to use reverse vs forward
Use the sales tax calculator when you know the pre-tax amount. Use this reverse page when you only know what left your card.