Frequently Asked Questions
Are all the calculators free?
Yes — every tool is free, with no account needed.
How accurate are the calculators?
Each uses a documented, version-controlled formula validated against test vectors. See our Calculation Methodology.
Do you save the numbers I enter?
No. All math runs in your browser; inputs never reach our servers.
Are the results financial advice?
No — they are educational estimates. See our Disclaimer.
Which tax regime / rates do the tools use?
Tools state their assumptions inline and are updated when rules change. The methodology page lists current assumptions.
Can I use FinMatz on my phone?
Yes — every page is mobile-first and works on any modern browser.
How do I request a new calculator?
Use the Request a Tool form.
How can I report an error?
Contact us via the contact page; we correct verified errors promptly.
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