Self-Employment Tax Calculator 2026
Calculate your SE tax (15.3%) on net self-employment income — Social Security + Medicare. Shows quarterly payment amounts, deductible half, and estimated schedule.
Your Self-Employment Income
Revenue minus business expenses
Used for Medicare surtax threshold check
Total Self-Employment Tax
$11,303.64
on $80,000 net profit
Social Security (12.4%)
$9,161.12
on $73,880
Medicare (2.9%)
$2,142.52
on $73,880
Deductible Half (income tax)
$5,651.82
Est. Quarterly Payment
$2,826
SE tax only
How This Was Calculated
2026 Quarterly Payment Schedule
SE tax portion only — add estimated income tax for total quarterly payment
Q1 (Jan–Mar 2026)
Due: April 15, 2026
$2,826
SE tax estimate
Q2 (Apr–May 2026)
Due: June 16, 2026
$2,826
SE tax estimate
Q3 (Jun–Aug 2026)
Due: September 15, 2026
$2,826
SE tax estimate
Q4 (Sep–Dec 2026)
Due: January 15, 2027
$2,826
SE tax estimate
Use IRS Form 1040-ES to calculate and submit quarterly payments.Form 1040-ES ↗