📘 Deduction for Half of Self-Employment Tax — Taxation Course | Enrolled Agent (EA) | CPA Exam

Why It Matters

The half‑tax deduction directly lowers adjusted gross income, increasing after‑tax cash flow for self‑employed taxpayers and is a core concept on the CPA and Enrolled Agent exams.

Key Takeaways

• Self‑employment tax rate is 15.3% of net earnings.
• Half of self‑employment tax is deductible above the line.
• Social Security tax applies only up to annual wage base (~$176,100).
• Medicare tax applies to all earnings, plus 0.9% extra threshold.
• Complete Schedule C and Schedule SE to calculate tax liability.

Summary

The video explains the self‑employment tax deduction that allows self‑employed filers to write off half of the tax they pay on net earnings. Professor Farhat walks through the mechanics of the 15.3% self‑employment tax—12.4% for Social Security and 2.9% for Medicare—and shows how the deduction appears on Schedule 1, line 15, before adjusted gross income.

Key data points include the $176,100 Social Security wage base for 2025, the 0.9% additional Medicare surcharge on high earners, and the 92.35% factor (100%‑7.65%) used to determine the portion of earnings subject to SE tax. The instructor demonstrates calculations on a $42,000 net profit example, arriving at a $5,934 tax liability and a $2,967 above‑the‑line deduction.

Notable examples feature a side‑gig taxpayer with $42,000 profit, a combined W‑2 and self‑employment scenario exceeding the wage base, and a multiple‑choice problem illustrating the step‑by‑step computation. The speaker repeatedly references Schedule C, Schedule SE, and the transfer of the half‑tax deduction to Form 1040 line 10.

For practitioners and CPA candidates, mastering this deduction reduces taxable income, improves cash‑flow planning, and ensures compliance with IRS Form 1040 reporting requirements. The half‑tax deduction is a critical lever for self‑employed professionals seeking to optimize their tax position.

Original Description

This lecture explains the deduction for half of self-employment tax, covering how SE tax is calculated, allowable deductions, and reporting requirements. Understanding this deduction is essential for tax planning and compliance, making it highly relevant for Taxation Courses, the Enrolled Agent (EA) exam, and the CPA Exam.

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