Self-Employment Tax & Quarterly Estimator
Calculate Schedule SE tax and your quarterly IRS payments.
Open the Interactive CalculatorHow It's Calculated
SE Taxable Income = Net SE Income × 92.35%.
SE Tax = (SE Taxable Income × 12.4% Social Security, capped at $168,600) + (SE Taxable Income × 2.9% Medicare) + 0.9% Additional Medicare above $200,000.
Quarterly Payment = Total SE Tax ÷ 4.
Example
Example: $75,000 net SE income → SE taxable income of $69,262.50. Social Security tax ≈ $8,588, Medicare ≈ $2,009, for a total SE tax of about $10,597, or roughly $2,649 per quarter.
Frequently Asked Questions
Why 92.35%?
The IRS lets self-employed taxpayers reduce net earnings by 7.65% (mirroring the employer-side FICA match) before applying SE tax rates.
Can I deduct this tax?
Yes — half of your SE tax is deductible from your gross income when calculating income tax owed.