Reverse Sales Tax Calculator
Enter total price (tax included) and tax rate. Get pre-tax amount + tax amount.
Breakdown
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Open BusinessOSCommon questions
When do I need reverse sales tax?
When you have the final price receipt but need the taxable base. Common for expense reports, business reimbursements, and reconciling receipts.
Is reverse calculation different from removing VAT?
Same math. Pre-tax = Total / (1 + rate). Both work identically for VAT and US sales tax.
Why does the tax amount seem lower than expected?
Because you're calculating tax on a smaller base. At 10% tax rate, $110 total means only $10 tax on $100 pre-tax — not $11.