How do I calculate price before tax?

Divide the total price by (1 + tax rate). For example: $108.50 total at 8.5% tax = $108.50 ÷ 1.085 = $100.00 before tax.

What is the reverse sales tax formula?

The formula is: Pre-Tax Price = Total Price ÷ (1 + Tax Rate). Tax Amount = Total Price - Pre-Tax Price.

Why would I need a reverse tax calculator?

A reverse tax calculator is useful when you know the total amount paid and need to find out the original price before tax and exactly how much tax was charged. This is common for expense reports, bookkeeping, and receipt verification.

Free Tool

Reverse Sales Tax Calculator

Know the total? Find the pre-tax price and exact tax amount.

How It Works

The reverse sales tax calculator works backwards from the total price to find the original pre-tax amount. This is useful when you have a receipt showing only the total and need to know the breakdown.

Pre-Tax Price = Total ÷ (1 + Tax Rate)

Tax Amount = Total − Pre-Tax Price

Example: You paid $54.25 total in Miami, FL (7% tax). Pre-tax = $54.25 ÷ 1.07 = $50.70. Tax paid = $3.55.

Common Use Cases

✓ Expense Reports: Break down totals into pre-tax amounts and tax for accurate business expense tracking.
✓ Bookkeeping: Separate tax collected from revenue when reconciling daily sales.
✓ Receipt Verification: Confirm that the correct tax rate was applied to your purchase.
✓ Returns & Refunds: Calculate the correct refund amount when returning an item.

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