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Yes. It's completely free to use, with no limits and no signup required.
No. This tool gives a simplified, illustrative estimate only. Tax rates, thresholds and deductions vary by country, state or region, and personal circumstances. Always confirm your actual liability with a qualified tax professional or your local tax authority.
No. The calculation runs entirely in your browser. Your revenue, expenses and rate never leave your device.
For the US it estimates self-employment tax (15.3% of 92.35% of net profit) plus an editable effective income-tax rate applied to net profit and other income. For Germany, the UK and other countries it applies a single editable effective tax rate to net profit plus other income, then divides by 12 for a monthly figure.