Self-Employed Tax Guide 2026: What You Owe, What You Can Deduct

Self-Employment Tax: The Number That Surprises People

When you work for an employer, you pay 7.65% in FICA taxes (6.2% Social Security + 1.45% Medicare). Your employer pays the other 7.65%. As a self-employed person, you pay both sides — a total of 15.3% on your net self-employment income, up to the Social Security wage base of $184,500 in 2026. Above that, only the 2.9% Medicare portion continues.

This is on top of your regular income tax. A freelancer earning $100,000 is not paying 22% federal tax. They're paying 22% income tax plus 14.1% SE tax (on the net base), for a combined marginal rate over 36%. That's not a complaint — just math that W-2 employees never see.

One piece of relief: you can deduct 50% of your SE tax from gross income when calculating AGI. This reduces the income on which income tax is computed. On $100,000, the SE tax is roughly $14,130. You deduct half ($7,065) before the income tax calculation. It's automatic — no itemizing required.

Combined Tax Burden: Self-Employed, Federal Only (2026)

These figures assume a single filer taking the standard deduction, no state income tax, and no other deductions. SE tax + federal income tax only.

Quarterly Estimated Tax Payment Dates — 2026

Unlike W-2 employees who have tax withheld automatically, self-employed workers must pay four times per year:

The underpayment penalty runs at approximately 8% annually on the shortfall. To avoid it, pay either 90% of your current-year liability or 100% of last year's total tax (110% if prior-year AGI exceeded $150,000). The prior-year safe harbor is easier — pull last year's return, divide the total tax by four, pay that quarterly.

Key Deductions for Self-Employed Workers

• Half of SE tax — deduct 50% of your annual SE tax from gross income. Automatic, no itemizing needed.
• Health insurance premiums — 100% deductible above the line if you're not eligible for employer-sponsored coverage through a spouse.
• Home office — business-use percentage of home expenses, or the simplified $5/sq ft method (max $1,500).
• SEP-IRA or Solo 401(k) — contribute up to 25% of net SE income or $70,000 (2026), whichever is less. This is the most powerful deduction available to high-earning self-employed workers.
• Business vehicle — IRS standard mileage or actual expenses.
• QBI deduction (Section 199A) — up to 20% deduction on qualified business income. Still in effect for 2026. Phases out for high-income service professionals in certain fields.

The Most Common Mistake

New freelancers treat all revenue as income and spend it. Then April hits. A practical rule that actually works: set aside 35% of every payment received into a separate account the day it arrives. Pay quarterly estimates from that account. Whatever's left after April 15 is genuinely yours.

When an S-Corp Election Makes Sense

Once your net self-employment income regularly exceeds $80,000–$100,000, an S-Corp election can reduce SE tax meaningfully. Under an S-Corp, you pay yourself a reasonable salary (subject to payroll taxes) and take the remainder as a distribution (not subject to SE tax).

On $150,000 net income with a $90,000 salary and $60,000 distribution: you save SE tax on the $60,000 — roughly $8,500 per year. Against $2,000–$4,000 in additional accounting and payroll costs, the net saving is $4,500–$6,500. At higher incomes, the math gets more compelling.

Sources: IRS Publication 334 (Tax Guide for Small Business); IRS Schedule SE instructions; IRS Rev. Proc. 2025-19; IRC §199A (QBI deduction); IRS Publication 560 (Retirement Plans for Small Business). This article is educational. Consult a CPA or enrolled agent for your specific situation.