Question 1

Do I have to pay self-employment tax?

Accepted Answer

Yes, if you earn $400 or more in net profit from self-employment in a year. This includes freelancers, contractors, gig workers, and sole proprietors. SE tax covers Social Security and Medicare — the same as FICA, but the self-employed person pays both the employee and employer halves.

Question 2

What is the SE tax rate in 2026?

Accepted Answer

The self-employment tax rate is 15.3%: 12.4% for Social Security (on earnings up to $176,100 in 2026) and 2.9% for Medicare (on all earnings, plus 0.9% for high earners above $200,000 single / $250,000 married). You pay this on 92.35% of your net profit.

Question 3

When are quarterly estimated tax payments due?

Accepted Answer

Quarterly tax payments are due: April 15, June 15, September 15, and January 15. If you expect to owe more than $1,000 in tax for the year, you must make estimated payments using Form 1040-ES. Missing deadlines triggers penalties of approximately 8% annualized.

Question 4

What can I deduct from self-employment income?

Accepted Answer

You can deduct business expenses: home office ($5/sq ft up to 300 sq ft), software subscriptions, equipment, mileage (67¢/mile in 2026), internet and phone, marketing, and professional services. Health insurance premiums (100% deductible above-the-line) and retirement contributions (SEP-IRA or Solo 401(k) up to $69,000 in 2026) also reduce taxable income.

Question 5

How do I calculate quarterly payments?

Accepted Answer

Estimate your annual taxable income, apply tax rates (including the 15.3% SE tax), and divide by four. You can also use the annualized income method to adjust quarterly payments if your income fluctuates throughout the year.

Question 6

What happens if I overpay estimated taxes?

Accepted Answer

Overpayments are applied to the next quarter or refunded when you file your annual tax return (Form 1040). You can file Form 1040-ES to reduce your next quarterly payment.

Question 7

Can I deduct half of SE tax?

Accepted Answer

Yes. You can deduct 50% of your SE tax (7.65%) as an adjustment to income on Schedule 1, Line 15. This reduces your AGI before calculating federal and state income tax.

Question 8

What is the QBI deduction and how does it affect my SE tax?

Accepted Answer

The Qualified Business Income deduction allows you to deduct up to 20% of your qualified business income from taxable income. It reduces income tax, not SE tax, but it helps lower your total tax burden.

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