Reverse tax calculator
Remove VAT or sales tax from any total price.
Enter a tax-inclusive amount and rate to calculate the pre-tax price and tax amount instantly. Built for invoice checks, pricing, receipts, and quick international comparisons.
At 20% tax, $120.00 gross equals $100.00 before tax and $20.00 tax.
Remove tax from a total
Net price = gross total / (1 + tax rate / 100). The tax amount is the gross total minus the net price.
120 at 20% becomes 100 + 20
If the total is 120 and the tax rate is 20%, the pre-tax amount is 100 and the tax amount is 20.
Use the exact rate
Some countries, states, provinces, and products use reduced or combined rates. Change the rate when your invoice uses a different one.
Country pages
Start with common tax rates
FAQ
What is a reverse tax calculator?
A reverse tax calculator works backwards from a tax-inclusive total to estimate the pre-tax price and tax amount.
Is this tax advice?
No. This site provides calculation help only. Check official tax guidance or a qualified professional for compliance decisions.
Can I use a custom tax rate?
Yes. Enter any tax rate between 0 and 100 to match your invoice, country, state, province, or product category.
Results are for calculation support only and do not replace official tax rules, accounting advice, or professional tax guidance.