Self-Employment & 1099 Taxes: Estimated Payments, SE Tax, and Deductions

7 min read

Tax Planning

The moment you earn your first dollar as a freelancer, contractor, or gig worker, the tax code treats you differently. You're now both employee and employer — and you owe self-employment (SE) tax on top of income tax, with no employer withholding it for you.

The Two Taxes You Owe

Working for yourself means paying two separate federal taxes:

1. Self-employment tax. This funds Social Security and Medicare. Employees pay 7.65% (6.2% Social Security + 1.45% Medicare) and their employer matches it. You pay both halves: 15.3% — 12.4% for Social Security (up to the $181,800 wage base in 2026) plus 2.9% for Medicare (no cap). An additional 0.9% Medicare tax applies to earnings above $200,000 (single) or $250,000 (married).

2. Income tax. Your net profit flows onto your personal return and is taxed at your ordinary income brackets, same as wages.

The practical result: a freelancer nets less than a W-2 employee earning the same gross, because the employee's 7.65% employer share was never theirs. Budget for roughly 25–30% of net profit going to taxes when you're starting out.

Quarterly Estimated Payments

No one is withholding for you, so the IRS wants its money four times a year. Estimated tax payments are due:

Q1: April 15 (Jan–Mar income)
Q2: June 15 (Apr–May income)
Q3: September 15 (Jun–Aug income)
Q4: January 15 of the following year (Sep–Dec income)

The safe harbor: you avoid penalties if you pay at least 100% of last year's tax (110% if your prior-year AGI was over $150,000), or at least 90% of this year's actual tax. For a first-time freelancer, the simplest approach is to set aside a fixed percentage of every payment and make equal quarterly payments based on last year's return.

The Deductions That Actually Help

Self-employment comes with real tax advantages that W-2 employees don't get:

Business expenses. Anything ordinary and necessary — software, equipment, a portion of your internet and phone, marketing, insurance, professional fees. These reduce your profit (and therefore both SE tax and income tax) dollar for dollar.
Home office. The simplified method lets you deduct $5 per square foot up to 300 square feet ($1,500 max). The regular method requires actual cost allocation but can be larger.
Health insurance premiums. Self-employed people can deduct health, dental, and long-term care premiums (for themselves, spouse, and dependents) as an above-the-line adjustment.
Retirement contributions. Solo 401(k) and SEP IRA contributions reduce your taxable income and are the single biggest lever for cutting your bill.
Half of SE tax. You can deduct the employer-equivalent half of your self-employment tax from your income, because a W-2 employer's share would be deductible too.

The 20% QBI Deduction

This is the big one. The Qualified Business Income (QBI) deduction — Section 199A — lets many self-employed people deduct 20% of their qualified business income before calculating income tax. It applies to sole proprietors, LLCs, S-corps, and partnerships, and it's now permanent law.

The deduction doesn't reduce your SE tax (only income tax), and it phases out for certain "specified service" businesses (doctors, lawyers, consultants) above $197,300 (single) / $394,600 (married) in 2025. But for most freelancers, it's a straight 20% haircut on taxable business income — one of the best reasons to run your own business.

Don't Skip the Tracking

The freelancer who keeps receipts and a separate bank account pays less than the one who reconstructs everything in April. Track mileage, save invoices, and set aside tax money in a dedicated account the day you're paid. A CPA or tax pro is almost always worth it the first year you're self-employed.