The marketplace application doesn't ask what you made last year. It asks what you expect to make this year — and for self-employed people it wants net profit after business expenses, not gross revenue. That one distinction decides your subsidy, your monthly premium, and whether you get a refund or a bill at tax time.
Premium tax credits are based on your projected modified adjusted gross income for the coverage year, for your whole tax household. Three parts of that sentence do the work:
Projected. Forward-looking, for the calendar year the plan covers. Last year's tax return is evidence, not the answer.
Net, not gross. If you're a sole proprietor or single-member LLC, the marketplace wants roughly what lands on your Schedule C bottom line — revenue minus ordinary business expenses. A freelancer who invoices $95,000 and spends $25,000 on software, contractors, insurance, and mileage is not a $95,000 filer. I've watched people report their gross, price themselves out of a credit they qualified for, and pay full freight for months.
Household, not you. It's the tax household — you, a spouse if you file jointly, and dependents you claim — and it includes every income source, not just the business. A spouse's W-2, interest, dividends, taxable retirement withdrawals, rental income all belong in the total.
Run the resulting number through the subsidy calculator before you assume anything about affordability. For 2026 coverage the credit generally applies to households between 100% and 400% of the federal poverty level, so where your estimate lands relative to those lines matters more than most self-employed people expect.
"I don't know what I'll make" is the honest answer for most self-employed people, and it's not a reason to guess wildly. Build the number instead:
Then set a recurring reminder — quarterly is plenty for most people — to compare year-to-date actuals against the estimate. Updating a projection you're clearly going to miss is a five-minute task in the marketplace account, and it's much cheaper than a correction at tax time. What happens when income changes mid-year covers that mechanic in detail.
The two errors don't cost the same, so guessing "somewhere in the middle" isn't automatically right.
Estimate too high and you take a smaller advance credit each month than you were entitled to. You've floated the government an interest-free loan, and you reconcile it on Form 8962 at tax time — generally getting the difference back as part of your refund. Annoying to your cash flow; recoverable.
Estimate too low and you took more advance credit than you earned the right to, which means paying it back. Below 400% of the federal poverty level, repayment is limited by caps that scale with income. Land above 400% and those caps generally don't apply — you can owe the entire year's advance credit back at once. For a self-employed person with a genuinely great fourth quarter, that's the scenario to plan around.
There's also a floor to watch. If your projection comes in under 100% of the federal poverty level and you're in a state that didn't expand Medicaid, you can fall into a gap where you qualify for neither marketplace subsidies nor Medicaid. Underestimating a volatile income can put you there on paper. If you're near that line, check Medicaid eligibility for your state before you finalize the application.
My general lean for self-employed clients: use the realistic middle of your range, then revisit quarterly. If your business has a history of surprise upside — or if a good year would push you past 400% — lean toward the higher end and let the refund come back to you.
MAGI is calculated after certain above-the-line deductions, which means some legitimate moves lower the income the subsidy formula sees. The ones that come up most for self-employed households:
That last one is genuinely circular: the deduction lowers your MAGI, a lower MAGI can raise your premium tax credit, and a larger credit reduces the premium amount you're allowed to deduct. The IRS has a defined method for resolving the loop, and it is not something to eyeball. Two practical notes: the deduction is generally taken on your Form 1040 rather than as a Schedule C business expense, and it's usually unavailable for any month you were eligible for coverage through an employer — yours or a spouse's.
I'm an insurance agent, not a tax professional, and this is the point where the two jobs stop overlapping. Coordinate the final number with whoever prepares your return.
A spouse's job offer can disqualify you. If anyone in your household has access to employer coverage that counts as affordable and meets minimum value, that can block premium tax credits for the household — even if nobody enrolls in it. It's one of the most common reasons a self-employed spouse's subsidy gets denied. Check the offer against the current-year affordability test with the employer coverage checker before assuming.
You usually need open enrollment — or a qualifying event. Going self-employed by choice isn't itself a qualifying life event, but losing the job coverage you had generally is, with a limited window to act. If you've recently left a job, or moved, or had a household change, run the special enrollment checker rather than assuming you have to wait for the fall.
Keep documentation. The marketplace can ask you to verify projected income when your estimate differs materially from IRS data — which is routine for self-employed applicants. Profit-and-loss statements, signed contracts, and bank records are the usual proof. Keep them somewhere you can find them in June.
Subsidy amounts, poverty-level thresholds, and affordability percentages are set annually and vary by household size, state, and county, so treat every figure here as the 2026 framework rather than a promise about your situation. If you'd rather have someone build the estimate with you and check it against the plans available in your county, that comparison costs nothing — carriers price identically whether you enroll alone or with an agent.
Net. For self-employment income, the marketplace wants your expected profit after ordinary business expenses — essentially your Schedule C bottom line — plus every other source of household income. Reporting gross revenue is the single most common self-employed application error, and it usually costs you subsidy you were entitled to.
Build a range from your prior-year return, contracted work, and known changes, then pick a realistic figure inside it and update it as the year unfolds. The marketplace expects estimates from self-employed applicants; what it doesn't forgive is never correcting one you know is wrong.
You reconcile on Form 8962 with your tax return and repay the excess advance credit. Below 400% of the federal poverty level, repayment is limited by caps that scale with income; above that line the caps generally don't apply and the full amount can come due. Updating your income in the marketplace mid-year shrinks or prevents the bill.
Generally not on Schedule C. The self-employed health insurance deduction is usually taken on Form 1040 as an above-the-line deduction, and it's typically unavailable for months you were eligible for coverage through an employer or a spouse's employer. It also interacts with the premium tax credit in a circular calculation — one to hand to your tax preparer.
It can. If an employer offer available to your household is considered affordable and meets minimum value, it can block premium tax credits for the people eligible for it — whether or not anyone actually enrolls. The affordability percentage is set each year, so test the current offer rather than relying on a prior year's answer.
Not automatically. Quitting to go self-employed isn't itself a qualifying event, but losing employer coverage generally is, and it opens a limited enrollment window. Outside of a qualifying event you'd wait for open enrollment. Check your specific situation before assuming either way.
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Important: This article is general information, not insurance, legal, tax, or medical advice. Coverage details vary by plan, carrier, state, and county, and change over time — always confirm benefits with the specific plan documents or a licensed agent before making decisions. Smooth Health Solutions is not connected with or endorsed by the U.S. government, the federal Medicare program, CMS, HealthCare.gov, or any state marketplace or government agency.