How it works
The displayed price is divided by one plus the rate, which recovers the base amount; the remainder is the tax already inside the price.
Example
A shelf price of $129.99 including 20% tax is $108.33 before tax and $21.66 of tax.
This tool is for estimation and education, not financial, tax, or legal advice.
Frequently asked questions
Do these tools know my local tax rate?
No. You enter the rate that applies to you, which is why the tools work in any country.
Does the calculator send my numbers anywhere?
No. The calculation runs locally in your browser.
Can I file with these figures?
No. Use them to sanity-check an amount, then rely on your tax authority or accountant for filing.
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