Free reverse sales tax calculator. Find the pre-tax price from a total that includes sales tax. Perfect for receipt analysis, expense reports, and bookkeeping.
The Reverse Sales Tax Calculator extracts the pre-tax price and tax amount from a total that already includes sales tax. Enter the total amount paid and the applicable tax rate to instantly see what the item cost before tax and how much tax was charged.
This is essential for expense reporting, bookkeeping, receipt reconciliation, and any situation where you have a tax-inclusive total but need the breakdown. Many receipts from restaurants, online purchases, or international transactions show only the total without separating the tax.
Simply enter the tax-inclusive total and the combined state and local tax rate to get an instant breakdown. When you see a receipt total that includes tax, extracting the pre-tax price requires knowing the exact tax rate and applying the reverse formula. This calculator handles that arithmetic instantly, whether you need it for expense reports, budgeting, or verifying that a business charged the correct rate on your purchase.
Businesses need to separate tax from purchases for accurate bookkeeping and tax deductions. This calculator makes it instant — no manual math needed. It is also useful for comparing pre-tax prices across different tax jurisdictions. Having the exact pre-tax amount is essential for accurate bookkeeping, tax filings, and verifying that the correct rate was applied.
Pre-Tax Price = Total / (1 + Tax Rate / 100) Tax Amount = Total – Pre-Tax Price Verification: Pre-Tax Price + Tax Amount = Total
Result: Pre-tax price: $99.72 | Tax: $8.23
A receipt total of $107.95 at an 8.25% tax rate. Pre-tax price = $107.95 / 1.0825 = $99.72. Tax amount = $107.95 – $99.72 = $8.23. Verification: $99.72 + $8.23 = $107.95.
Expense reports often require pre-tax amounts for proper categorization. Credit card statements show only totals. International purchases include VAT in the sticker price. In all these cases, extracting the tax component is necessary for accurate financial records.
For bookkeeping, process all receipts from the same jurisdiction together since they share the same tax rate. Group by tax rate, then run each group through the calculator. This saves time and reduces errors when preparing monthly expense reports.
If a receipt shows both the subtotal and total, verify the rate: Tax Rate = (Total – Subtotal) / Subtotal × 100. Use this verified rate for future receipts from the same location to ensure accuracy.
Rounding differences can occur because tax is typically calculated per line item, not on the total. The receipt calculates tax on each item individually and sums the taxes, while this calculator applies the rate to the grand total. The difference is usually pennies.
Yes. VAT works the same way as sales tax for extraction purposes. Enter the VAT rate (e.g., 20% for UK) and the total price to extract the pre-VAT amount. The formula is identical: Pre-tax = Total / (1 + VAT rate).
Separate the items by tax rate category, then calculate each group independently. For example, if groceries are tax-free and prepared food is taxed at 8.25%, process the prepared food total separately.
If you itemize deductions, you can deduct either state income tax or state/local sales tax (not both) under the SALT deduction, capped at $10,000/year. Keeping reverse-calculated tax amounts helps document your sales tax deduction.
Look up your state and local combined rate on your state's Department of Revenue website or use a ZIP code lookup tool. You can also check a receipt from the same location that shows the tax separately to determine the rate.
Yes. Any tax-inclusive pricing system works with this formula. Common examples include European VAT (typically 15–25%), Canadian GST/HST (5–15%), and Australian GST (10%).