Self-Employment & 1099 Tax Calculator
Computes SE tax (Social Security + Medicare), the deductible-half adjustment, the 20% QBI deduction, and federal income tax for Schedule C filers.
Net SE income
$105,000
SE tax (15.3%)
$14,836
QBI deduction (20%)
$19,516
Federal income tax
$8,344
Total federal tax
$23,180
Quarterly estimate
$5,795
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Social Security taxed up to $184,500 of combined W-2 + SE earnings (2026). Half of SE tax is deductible. State tax not included.