Reverse Sales Tax Calculator β Find Pre-Tax Price From Total
Calculate the original pre-tax price and sales tax amount from a total that already includes tax. Enter any total price and tax rate.
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Sales Tax Amount
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Total (verification)
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Reverse Calculation
How to Use This Reverse Sales Tax Calculator
Enter the total amount you paid (including sales tax) and the sales tax rate. The calculator instantly shows the original pre-tax price and the exact tax amount that was included in your total.
Use the quick state selector to automatically apply a common state rate, then adjust for your local rate if needed.
The Formula
Pre-tax price = total price Γ· (1 + tax rate)
Tax amount = total price β pre-tax price
Verification: pre-tax price + tax amount = total price
Tax amount = total price β pre-tax price
Verification: pre-tax price + tax amount = total price
Example
Receipt total: $53.99, California sales tax 8.25%:
Pre-tax price: $53.99 Γ· 1.0825 = $49.88
Tax amount: $53.99 β $49.88 = $4.11
Verification: $49.88 + $4.11 = $53.99
Pre-tax price: $53.99 Γ· 1.0825 = $49.88
Tax amount: $53.99 β $49.88 = $4.11
Verification: $49.88 + $4.11 = $53.99
Extended
Multi-Item Tax Calculator
Add multiple items to calculate individual and combined tax breakdown
Add multiple items to calculate combined reverse tax breakdown.
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Multi-Item Breakdown
| Item | Total Paid | Pre-Tax | Tax Amount | Rate |
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Frequently Asked Questions
How do I calculate the price before tax from a total?
To find the pre-tax price: divide the total price (tax included) by (1 + tax rate as decimal). For example, if you paid $108 with an 8% sales tax rate: $108 Γ· 1.08 = $100 pre-tax price. The sales tax amount is $108 β $100 = $8. This calculator does this automatically.
Why would I need to reverse-calculate sales tax?
Common reasons: when you have a receipt showing only the total and need to expense the pre-tax amount, accounting purposes where tax and product cost must be separated, checking that a vendor charged the correct tax, verifying prices on insurance claims, or when splitting a bill and needing the pre-tax total for tip calculations.
What is the average US sales tax rate?
The average combined (state + local) sales tax rate in the US is about 7.0-8.0% as of 2025. Tennessee has the highest average combined rate at about 9.55%, followed by Louisiana (9.52%), Arkansas (9.47%), Alabama (9.24%), and Oklahoma (8.98%). Five states have no sales tax: Oregon, Montana, New Hampshire, Delaware, and Alaska (though Alaska allows local taxes).
Are all purchases subject to sales tax?
No. Most states exempt groceries (unprepared food), prescription drugs, and medical equipment. Some states exempt clothing under a certain price threshold. Sales tax applies primarily to tangible personal property (goods you can touch). Services vary by state β some states heavily tax services, others exempt most services. Digital goods and downloads have increasing tax obligations.
How does reverse sales tax work for tipped services?
For restaurant bills, tips should be calculated on the pre-tax subtotal (not on the total including tax). If your bill shows a total of $108 with 8% tax, the pre-tax amount is $100. A 20% tip on $100 = $20. Applying tip to the taxed total would result in a higher effective tip percentage than intended.