Key Takeaways

• The self-employment (SE) tax rate is 15.3% — covering Social Security (12.4%) and Medicare (2.9%)
• SE tax applies to net self-employment earnings of $400 or more
• You can deduct half of your SE tax from your gross income (not as a Schedule A itemized deduction — as an above-the-line deduction on Schedule 1)
• The Social Security portion (12.4%) only applies to the first $184,500 of net self-employment income in 2026
• The Additional Medicare Tax adds 0.9% on earnings above $200,000 (single) / $250,000 (MFJ)
• Forming an S-corporation can reduce SE tax for high earners — by paying yourself a reasonable salary and taking remaining profits as distributions not subject to SE tax

Why Self-Employment Tax Exists

When you work as an employee, your employer splits Social Security and Medicare taxes with you — each pays 7.65% (6.2% SS + 1.45% Medicare), for a combined 15.3%. When you’re self-employed, there’s no employer — you pay both halves yourself, totaling 15.3%.

This catches many new freelancers and side hustlers off-guard. They budget for income tax but forget about SE tax — and then face a surprise bill at tax time.

The silver lining: The IRS allows you to deduct half of your SE tax as an above-the-line deduction on Schedule 1. This reduces your adjusted gross income (AGI), which in turn reduces your income tax — partially offsetting the SE tax burden.

2026 SE Tax Rates and Thresholds

Source: IRS, Social Security Administration 2026.

Worked Example: Freelancer Earning $80,000

1. Gross self-employment income: $80,000
2. Business expenses (deducted on Schedule C): $15,000
3. Net self-employment income: $65,000
4. SE tax base: $65,000 × 92.35% = $60,028 (IRS adjustment — you pay SE tax on 92.35% of net income, not 100%)
5. SE tax: $60,028 × 15.3% = $9,184
6. Deductible half of SE tax: $9,184 / 2 = $4,592 (deducted from gross income on Schedule 1)
7. Adjusted gross income after SE deduction: $65,000 − $4,592 = $60,408

How to Calculate SE Tax (Step by Step)

Step 1: Calculate net self-employment income (Schedule C revenue minus business expenses)

Step 2: Multiply by 92.35% (IRS adjustment that accounts for the employer portion deduction)

Step 3: Multiply by 15.3% (or 2.9% for income above $184,500)

Step 4: Divide by 2 to find the deductible half (this reduces your AGI)

Step 5: Report SE tax on Schedule SE; deduct half on Schedule 1, Line 15

Schedule C vs. SE Tax: Understanding the Difference

Many new self-employed people confuse these two taxes:

You pay both income tax and SE tax on your self-employment profits. This is why self-employed workers should set aside 25–30% of net income for taxes.

SE Tax Deductions: What Reduces Your Bill

1. Business Expenses (Schedule C)

Every legitimate business expense reduces your net SE income, which reduces your SE tax dollar-for-dollar. Common deductions:

• Home office (dedicated space for business)
• Vehicle mileage: 67 cents per mile (2026 IRS standard rate)
• Equipment, software, subscriptions
• Health insurance premiums (self-employed health insurance deduction — above-the-line, reduces AGI)
• Retirement contributions (SEP IRA, Solo 401k — see below)

See Self-Employed Tax Deductions 2026 for the complete list.

2. Retirement Account Contributions

Contributing to a SEP IRA or Solo 401(k) reduces your net SE income:

3. S-Corporation Election

For self-employed individuals earning significant income (generally $60,000+ in net SE income), forming an S-corporation and paying yourself a reasonable salary can reduce SE tax significantly.

How it works:

• The S-corp pays you a salary (subject to SE/payroll taxes)
• Remaining profits are distributed as dividends (NOT subject to SE tax)
• The “reasonable salary” requirement is enforced by the IRS — you can’t pay yourself $1 to avoid all payroll taxes

Example: $150,000 net income as sole proprietor: SE tax = ~$20,000. Same income as S-corp owner with $80,000 salary: SE tax on $80,000 = ~$10,600. Savings: ~$9,400 (minus S-corp formation and accounting costs of ~$2,000–$3,000/year).

Quarterly Estimated Tax Payments

If you expect to owe $1,000 or more in taxes for the year, you must make quarterly estimated tax payments to the IRS. SE tax is included in this calculation.

Underpaying quarterly taxes results in a penalty (currently ~8% annualized). See Quarterly Estimated Taxes 2026.

FAQ

Do I owe SE tax on all income or just profit? Only on net profit — revenue minus business expenses. If your Schedule C shows $50,000 in revenue and $20,000 in legitimate business expenses, you owe SE tax on $30,000 (net), not $50,000 (gross).

I have a full-time job and a side hustle. Do I still owe SE tax? Yes. SE tax applies to your side hustle net income of $400 or more regardless of W-2 employment. However, your W-2 wages count toward the $184,500 Social Security wage base — if your W-2 wages alone exceed $184,500, you won’t owe the 12.4% SS portion on your side hustle income (just the 2.9% Medicare portion).

Can I deduct health insurance as a self-employed person? Yes — the self-employed health insurance deduction allows you to deduct 100% of health, dental, and long-term care insurance premiums for yourself and your family as an above-the-line deduction on Schedule 1. This reduces both your income tax and your AGI (which affects other deductions and credits).

Do partnerships and LLCs pay SE tax? Partners in a general partnership and LLC members taxed as partnerships typically owe SE tax on their share of business income. S-corp members only owe SE/payroll tax on their salary, not distributions. Consult a tax professional for entity-specific planning.

Sources

1. IRS. Self-Employment Tax (Social Security and Medicare Taxes). IRS.gov.
2. IRS. Schedule SE Instructions. IRS.gov.
3. SSA. 2026 Social Security Wage Base. $184,500.
4. IRS. Publication 334 — Tax Guide for Small Business. 2025 edition.

Related Articles:

• Self-Employed Tax Deductions 2026
• Quarterly Estimated Taxes 2026
• Tax Tips for Freelancers 2026
• 2026 Tax Brackets
• Best Side Hustles 2026

Source: IRS.gov; SSA.gov. Last verified: March 2026.

Tax Planning Beyond the Basics

Understanding your tax situation is one of the highest-value financial activities you can engage in:

Contribute to tax-advantaged accounts. Every dollar in a traditional 401(k) or IRA reduces your current-year taxable income. Every dollar in a Roth IRA reduces your future tax bill. Both are powerful.

Know your effective vs. marginal rate. Your marginal rate (the highest bracket you’re in) isn’t what you pay on all income. Your effective rate (total taxes ÷ total income) is much lower. This distinction matters for decision-making.

Tax-loss harvest in taxable accounts. Deliberately realize losses to offset gains and up to $3,000/year of ordinary income. Many robo-advisors do this automatically.

Time income and deductions strategically. If you’re near a bracket boundary, accelerating deductions into the current year or deferring income to the next can reduce taxes meaningfully.

Sources

1. IRS. Tax Withholding Estimator. IRS.gov.
2. IRS Revenue Procedure 2025-32. 2026 inflation adjustments for tax provisions.
3. Tax Policy Center. 2026 Tax Parameters. TPC.org.

Last verified: March 2026.

Key Takeaways Revisited

Building financial security is a multi-step process. The strategies and information in this guide work best as part of a coordinated approach:

• Foundation first: Emergency fund (3–6 months) in a high-yield savings account before investing
• Tax-advantaged accounts: Roth IRA ($7,000/year) and 401(k) matching before any taxable investing
• Low costs: Every 1% in fees costs you roughly 25% of your final portfolio over 30 years — keep total costs under 0.10%
• Consistency: Regular contributions on autopilot beat occasional large contributions driven by market optimism
• Long time horizon: The single most important factor in wealth building is time in the market, not timing the market

Whether you’re just starting out or optimizing an existing financial life, the principles that work are simple, well-established, and available to anyone willing to implement them consistently.

The next step: Pick one action from this guide and do it today. Open that account. Set that automatic transfer. Make that call. Progress beats perfection every time.