How 2026 Self-Employment Tax Is Calculated
Self-employed individuals (1099 contractors, freelancers, sole proprietors, and LLC owners) pay self-employment tax under the Federal Insurance Contributions Act (FICA). This tax covers Social Security (12.4%) and Medicare (2.9%), totaling 15.3%.
Statutory Fact Note: For 2026, the Social Security wage cap is set at $176,100. Income earned above this threshold is subject only to the 2.9% Medicare tax portion (plus an additional 0.9% Medicare tax for single filers earning over $200,000).
Step 1: Net Earnings Calculation
The IRS multiplier for net Schedule C profit is 92.35% (0.9235). This accounts for the employer half of the FICA deduction.
Net SE Earnings = (Gross 1099 Revenue − Business Expenses) × 0.9235
SE Tax = Net SE Earnings × 15.3%
Step 2: 2026 Quarterly Estimated Payment Due Dates
If you expect to owe $1,000 or more in federal tax for 2026, the IRS requires quarterly estimated tax payments on Schedule 1040-ES:
- Q1 Payment: April 15, 2026 (Covering Jan 1 – Mar 31)
- Q2 Payment: June 15, 2026 (Covering Apr 1 – May 31)
- Q3 Payment: September 15, 2026 (Covering Jun 1 – Aug 31)
- Q4 Payment: January 15, 2027 (Covering Sep 1 – Dec 31)
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