Finance
Tax and markup calculator
Useful for sales tax, service charge, platform fee, or markup estimates.
Tax and markup calculator
Enter a base amount and percentage to calculate the extra amount and total.
Formula and method
This is a simple percentage estimate, not tax or accounting advice.
Example
Example: 100 plus 8% adds 8 for a total of 108.
Last updated:
FAQ
Can I use this in any country?
Yes. Enter values or rules that match your location.
Does GoGo Tools store my inputs?
Regular calculations run in your browser. Analytics events record the tool slug only and do not include input values.
Can I use the result for official documents?
Use results for quick estimates. For official use, rely on source files, official rules, or professional advice.
Does it work on mobile?
Yes. Tool pages are responsive for phones and desktop browsers.
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