Calculate the original amount before tax from the final price. Essential for business expenses, receipt analysis, and tax planning. Works with sales tax, VAT, GST, and any other tax types.
Calculating tax breakdown...
A reverse tax calculator helps you determine the original amount before tax was applied when you know the final price including tax. This is essential for business expense analysis, receipt verification, and tax planning. Instead of calculating tax forward (amount + tax = total), it works backward (total - tax = amount).
Whether you're dealing with sales tax, VAT, GST, or any other tax type, our calculator provides accurate pre-tax amounts and detailed breakdowns for accounting and business purposes.
When you have the final price including tax and need to find the original amount:
When you have the pre-tax amount and need to calculate the total with tax:
You need reverse tax calculation when you have a receipt or invoice showing the total amount including tax, but you need to know the pre-tax amount for accounting, bookkeeping, or tax reporting purposes.
Yes, our calculator uses standard mathematical formulas used by accountants and businesses worldwide. However, always verify calculations for important financial decisions and consult with a tax professional for complex situations.
Absolutely! This calculator works with any percentage-based tax including sales tax, VAT, GST, HST, and other consumption taxes. Just enter the appropriate tax rate for your location.
For multiple tax rates (like GST + PST), add the rates together to get the combined rate. For example, 5% GST + 7% PST = 12% total tax rate.
Our reverse sales tax calculator is specifically designed to work backwards from your total purchase amount (including sales tax) to determine the original pre-tax price and the exact sales tax amount paid.
Enter your receipt total and local sales tax rate to find the pre-tax amount
Works with any state, county, or city sales tax rate from 0% to 15%+
Get immediate breakdown of pre-tax amount, sales tax paid, and total
Scenario: You have a receipt showing $54.00 total
Your local sales tax rate: 8%
Question: What was the pre-tax price?
Reverse Sales Tax Calculation:
Pre-tax amount = $54.00 ÷ (1 + 0.08) = $50.00
Sales tax paid = $54.00 - $50.00 = $4.00
Calculate pre-tax amounts from retail receipts for business expense tracking and personal budgeting.
Separate sales tax from business purchases for accurate accounting and tax deduction purposes.
Analyze sales tax impact on purchases and compare effective tax rates across different locations.
Separate tax amounts from business expenses for accurate bookkeeping and tax deduction calculations.
Analyze true costs without tax distortion for better business decision making.
Ensure accurate financial records and tax compliance with proper expense categorization.
Customer receipt shows $86.40 total
Local sales tax rate: 8%
Total bill with taxes: $234.50
Combined tax rate: 13.5%
Invoice total: $5,300.00
GST/HST rate: 13%
Handle complex scenarios with multiple tax types applied to the same transaction.
Total amount: $113.00
GST: 5% + PST: 8% (compound)
Total amount: $108.75
State: 6% + Local: 2.5% = 8.5% total
Understand how rounding affects tax calculations and maintain accuracy in financial records.
This reverse tax calculator is provided for informational and educational purposes only. Tax laws and rates vary by jurisdiction and change frequently. Always consult with qualified tax professionals or accountants for official tax advice and compliance requirements.
Not a substitute for professional advice: This tool should not replace consultation with certified tax professionals, especially for complex business transactions or tax planning strategies.
Get accurate tax breakdowns for business expenses and receipts - completely free!
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