Self-employment tax calculator

15.3%: 12.4% for Social Security on the first $184,500 and 2.9% for Medicare on all of it, charged on 92.35% of what the business clears. Above $200,000 ($250,000 filing jointly) another 0.9% of Medicare applies.

A single filer with $95,000 of profit and no other income owes $13,423 of self-employment tax and $7,417 of federal income tax in 2026, $20,840 in all, before any state tax.

Not under $400 of net earnings for the year. From $400 it applies to all of it, and you file Schedule SE with your return.

Yes. Half of it comes off your income before income tax is worked out, the way an employer’s half of payroll tax never counts as an employee’s income. It doesn’t lower the self-employment tax itself.

Yes. Wages from a job count toward the $184,500 Social Security limit first, so with a large salary the business pays only the 2.9% for Medicare on most of its profit, and this calculator shows more than you owe.

Business expenses, because they come off profit before both taxes. Health insurance premiums and retirement contributions lower income tax but not self-employment tax, because they come off after profit. An S corporation can lower it by paying you part as salary and part as a distribution.

Four times a year as estimated tax, since no one withholds it. The dates, and a calendar file.

No. It is federal only, and child tax credits and other credits come off income tax after all of this, so the income tax figure is the most you would owe.