Self-Employment and Gig Income
More people than ever earn money outside a traditional paycheck — freelancing, driving, delivering, selling, consulting, running a side business. The money is just as real, but it arrives with nothing taken out, and that single difference from a W-2 job is the source of almost every first-year surprise. This module covers how to handle that well: the taxes nobody withheld for you, the habit that prevents a painful April, and the retirement and structure decisions that are now yours to make. It’s general education, not tax advice for your situation — and because rates, thresholds, and contribution limits adjust most years, the recurring instruction here is confirm the current numbers at irs.gov. Once your self-employment income is meaningful, a CPA or enrolled agent genuinely earns their fee.
1099 vs. W-2: what actually changes
A W-2 employee has income tax, Social Security, and Medicare automatically withheld from each paycheck, and the employer pays half of the Social Security and Medicare tax.
A self-employed or gig worker — often paid via a 1099-NEC, or simply cash and app deposits — receives the full amount with nothing withheld. You are responsible for the income tax and the full Social Security and Medicare tax yourself.
That’s the whole trap in one sentence: the money looks bigger because the taxes haven’t been taken out yet. They’re still owed.
Self-employment tax
Self-employment tax is how the self-employed pay into Social Security and Medicare. Because you’re both the employer and the employee, you pay both halves — about 15.3% of your net self-employment earnings (12.4% Social Security, up to an annual wage cap, plus 2.9% Medicare with no cap; very high earners owe a small additional Medicare amount). Crucially, this is on top of regular income tax — it’s the part that blindsides people who assumed “I’ll just owe a little income tax.” There is one bit of relief built in: you deduct the employer-equivalent half of this tax when figuring your income tax. Confirm the current rate and the Social Security wage cap at irs.gov.
The habit that prevents a disaster: set aside, and pay quarterly
This is the most important section in the module, and it’s a habit, not a calculation.
Set aside a fixed percentage of every payment for taxes — commonly 25% to 35%, depending on your income, your other income, and your state — and move it into a separate account you don’t touch. Do this the day the money arrives, not at year-end.
Pay quarterly estimated taxes. The IRS expects tax to be paid as you earn it, so the self-employed generally make estimated payments about four times a year (due dates fall roughly in April, June, September, and January — confirm the exact dates each year at irs.gov), typically required if you’ll owe more than $1,000 for the year. Underpaying triggers a penalty. You can pay free online through IRS Direct Pay or EFTPS.
A useful safety net: if you pay in at least 100% of last year’s total tax (110% if you’re a higher earner) through withholding and estimates, you generally avoid an underpayment penalty even if you end up owing more — a “safe harbor” worth asking your tax preparer about.
This one set-aside habit is the entire difference between a calm April and a five-figure surprise.
Track expenses and separate your money
Open a separate bank account — and ideally a separate card — for the business. Mixing business and personal money is the single most common bookkeeping mistake, and it makes taxes (and any audit) far harder than they need to be.
Track deductible business expenses. Legitimate costs lower your taxable profit: supplies, software and subscriptions, business mileage (the IRS sets a standard mileage rate each year), a home-office portion if you qualify, platform and payment fees, professional development, and business meals (generally 50% deductible). Keep receipts and a contemporaneous mileage log — “I think I drove a lot” is not a record.
A deduction worth knowing: the QBI deduction
Many self-employed people and small-business owners can take the Qualified Business Income (QBI) deduction — a deduction of up to 20% of qualified business income — which the 2025 tax law made permanent. It has income thresholds and rules (and some service businesses phase out at higher incomes), so it’s worth confirming your eligibility at irs.gov or with a tax professional, but for many ordinary self-employed filers it meaningfully lowers the income-tax bill.
Your business structure (a CPA conversation as you grow)
By default, a one-person business is a sole proprietorship, reported on Schedule C with your personal return — simple, and the right answer for most people starting out. An LLC can add liability protection without changing how you’re taxed by default. Once your profit is substantial, some owners elect S-corporation status, which can reduce self-employment tax by splitting income between a “reasonable salary” (subject to payroll tax) and distributions (which aren’t) — but it adds payroll, paperwork, and accounting cost, and only pencils out above a certain income. This is precisely the kind of decision to run past a CPA or enrolled agent rather than copy from a video; the right structure depends on your numbers.
Don’t forget retirement and benefits
Without an employer plan, the responsibility is yours — but so are some unusually strong tools:
Retirement. A SEP-IRA or a Solo 401(k) lets the self-employed save for retirement with tax advantages and much higher contribution limits than a standard IRA (the exact limits change yearly and depend on your earnings — confirm at irs.gov). Even small, consistent contributions matter, and they can lower your taxable income now. (See Week 23 for how these accounts work.) Nothing to set aside yet? That’s fine — the set-aside-for-taxes habit comes first; retirement saving can scale up as the income stabilizes.
Health insurance. You’ll arrange your own, usually through the ACA marketplace at healthcare.gov (where you may qualify for premium tax credits — though the subsidy rules changed for 2026, so check the current cost). Self-employed people can often deduct their health-insurance premiums (an “above-the-line” deduction), and pairing a high-deductible plan with an HSA adds a tax-advantaged way to cover medical costs.
State rule — state income tax, sales tax, and business registration. What varies: whether you owe state income tax (and state estimated payments), whether you must register your business or get a local license, and whether you must collect and remit sales tax on what you sell — all of which differ by state and even city. Where to check: your state Department of Revenue and your city or county clerk (search “[your state] sales tax registration” and “[your city] business license”).
The honest limit
This module is general financial and tax education, not advice for your specific business, and it can’t tell you your exact rates, limits, or the right structure for your situation. Self-employment-tax rates and caps, contribution limits, the mileage rate, the QBI rules, and ACA subsidies all change and depend on your numbers, so confirm the current figures at irs.gov before relying on them. Once your income is meaningful, a one-time (and recurring) consultation with a CPA or enrolled agent — often roughly $200 to $500 to start — typically pays for itself in tax saved and mistakes avoided. This page gives you the map and the one habit that matters most; it doesn’t replace personalized advice. (Tax season generally, free filing, and IRS payment options are covered in the Tax Season module.)
Key takeaways
The money arrives untaxed — that’s the whole difference. You owe regular income tax plus about 15.3% self-employment tax (Social Security and Medicare, both halves), with nothing withheld.
The one habit that prevents disaster: set aside 25–35% of every payment into a separate account the day it lands, and pay quarterly estimated taxes (roughly April/June/September/January; required if you’ll owe over $1,000).
Separate your money and track expenses — a dedicated business account and real records (receipts, a mileage log) lower your taxable profit and make taxes far easier.
Use the tools built for you: the QBI deduction (up to 20%, now permanent), a SEP-IRA or Solo 401(k) (far higher limits than a standard IRA), the self-employed health-insurance deduction, and — as your profit grows — a CPA conversation about business structure (sole prop vs. LLC vs. S-corp).
Confirm every figure at irs.gov, since rates, caps, and limits change yearly — and remember a 1099 isn’t required for income to be taxable (assume the IRS can see it).
Educational disclaimer: This page provides general financial education for a general audience in the United States. It is not individualized tax, legal, or financial advice. Self-employment-tax rates and wage caps, retirement-contribution limits, the standard mileage rate, the QBI rules, business-structure choices, and ACA subsidy rules change over time and depend on your specific situation, and obligations vary by state and locality. Confirm all current figures at irs.gov (and your state Department of Revenue) and consult a CPA or enrolled agent for your situation before relying on this. Date-sensitive items were verified against official or primary sources as of June 2026; confirm current numbers before relying on them.