Self-Employment Tax Calculator
Work out self-employment tax from net earnings, the taxable share and the rate that applies, with the quarterly instalment alongside.
Work out self-employment tax
Frequently Asked Questions
Net earnings times the taxable share, times the rate you enter. The US figures of 92.35% and 15.3% are prefilled as a starting point, not baked in.
Use your own, for a period you can actually measure. A calculator like this is only as good as the inputs, and the most common error is using a number that covers a different period or a different set of costs.
No. Everything is worked out in your browser and nothing is sent anywhere or saved.
We do not publish one, deliberately. Benchmarks for these measures vary enormously by sector, stage and how each company defines the inputs, so a number quoted without those definitions tends to mislead more than it helps.