If you drive for Uber, deliver for DoorDash, clean houses, do hair from home, babysit, or do any kind of work where nobody takes taxes out of your pay, you are — in the IRS's eyes — self-employed. That means tax time works differently for you than for someone with a regular paycheck.
And if you're also on Medi-Cal or other California benefits, tax time is especially important — because how you file directly affects the income number that determines your eligibility.
Most tax guides don't think about this combination. This one does.
"For gig workers on benefits, filing your taxes correctly isn't just about what you owe. It's about controlling the income number that determines whether your family keeps their health coverage."
What makes gig worker taxes different
When you work a regular job, your employer withholds income taxes and Social Security/Medicare taxes from every paycheck. You get a W-2. You file. Simple.
When you're self-employed, none of that happens automatically. You get a 1099-NEC (or just cash, in some cases). You're responsible for:
- Self-employment tax — 15.3% on your net self-employment income (this covers Social Security and Medicare that an employer would normally split with you)
- Income tax — on your net profit after business expenses
- Quarterly estimated payments — if you expect to owe more than $1,000 for the year
The good news: you also get access to deductions that W-2 employees don't.
Business expenses reduce your taxable income — and your MAGI
Your self-employment income for tax purposes is your gross income minus your business expenses. This net income is what's used to calculate both your taxes and your MAGI. Tracking and deducting your real business expenses is the first line of defense for both your tax bill and your benefits eligibility.
The two deductions that hit your MAGI the hardest
Beyond business expenses, self-employed people can take additional "above-the-line" deductions that reduce their MAGI even further. These two are the biggest:
Half of your self-employment tax
You pay 15.3% self-employment tax, but you can deduct half of it (7.65%) from your adjusted gross income. This isn't just a regular deduction — it's an above-the-line deduction that reduces your MAGI. On $30,000 of net self-employment income, this saves you roughly $2,295 in MAGI.
SEP-IRA contribution
Self-employed people can contribute up to 25% of their net self-employment income to a SEP-IRA — reducing their MAGI by that same amount. This is the most powerful MAGI-reduction tool available to gig workers. We cover it in detail in our SEP-IRA article.
A worked example
DoorDash driver, household of 3 — Medi-Cal threshold $36,777
That's a driver who grossed $42,000 — well above the Medi-Cal threshold — ending up with a MAGI of $23,704 after legitimate deductions and a SEP-IRA contribution. Medi-Cal: protected. Tax bill: dramatically reduced. Retirement: funded.
What forms you need
- Schedule C — reports your self-employment income and business expenses. This is where your net profit (and your MAGI from self-employment) is calculated.
- Schedule SE — calculates your self-employment tax
- Schedule 1 — where you report above-the-line deductions including the half-SE-tax deduction and SEP-IRA contribution
- Form 1040 — your main tax return
Free tax help is available in California
VITA (Volunteer Income Tax Assistance) sites across California offer free tax preparation for people earning under $67,000/year. Many VITA volunteers are specifically trained to handle self-employment income. Find your nearest site at irs.gov/vita ↗ or call 211.
See your MAGI after deductions
Enter your net self-employment income (after business expenses) into the calculator to see exactly where your MAGI lands relative to your benefits thresholds.
Check my MAGI →Want to open a SEP-IRA to reduce your MAGI further? See our recommended brokerages →