Calculate flat-rate income tax from your own figures.
Calculated in your browser. No account required. Illustrative estimate. Review the assumptions before using the result.View calculation table
How this calculation works
Tax = Taxable income × Flat tax rate
Enter the labelled inputs. Percent fields use 5 for 5%. Only where a flat rate applies.
A worked example
Taxable income: 50000 USD; Manual flat tax rate: 20 %. Flat-rate income tax: 10,000 USD.
Assumptions and limitations
Only where a flat rate applies. All monetary inputs must use one currency and time period unless conversion is explicit. Manual inputs only; no live prices or official rule tables. Illustrative user-defined tax assumptions, not an official jurisdiction/year tax calculation. Confirm current applicable rules before use.
Common questions
Why can my actual result differ?
Only where a flat rate applies. All monetary inputs must use one currency and time period unless conversion is explicit. Manual inputs only; no live prices or official rule tables. Illustrative user-defined tax assumptions, not an official jurisdiction/year tax calculation. Confirm current applicable rules before use.
Are my inputs saved?
The calculator code processes inputs within your browser and does not send them to our server or save them in browser storage. Downloads and copied summaries remain under your control.