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.

Reviewed by CalcMulti Editorial Team·Last reviewed: March 2026·Sources:IRS Schedule SE, IRS Publication 505·Editorial standards

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

Net self-employment profit$80,000
× 92.35% (employer-equivalent deduction)$73,880.00
Social Security base (capped at $168,600)$73,880.00
SS tax: $73,880.00 × 12.4%$9,161.12
Medicare tax: $73,880.00 × 2.9%$2,142.52
Total SE Tax$11,303.64

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 ↗

Frequently Asked Questions