In November, you open the marketplace site to renew your health plan and type a number into a single box: your expected income for next year. It takes four seconds. You pick something that feels reasonable, maybe last year's figure, maybe a round number you hope to hit. Fourteen months later, in a tax-prep window in the spring, that four-second guess comes back as a bill.

This is one of the quieter traps of freelance life. Nobody sends you a reminder about it. It isn't a penalty, and it isn't a mistake you made on a tax form. It's a loan you didn't know you were taking.

The subsidy is an advance, not a gift

If you buy insurance through the Affordable Care Act marketplace, the premium tax credit lowers your monthly premium. Most people take it in advance: the government pays part of your premium straight to the insurer, based on the income you predicted when you enrolled.

The word that matters is advance. The credit you're actually entitled to is calculated after the year ends, using your real income. That reconciliation happens on Form 8962, which you file with your return. The marketplace sends you Form 1095-A in January, showing the advance payments made on your behalf. You compare the credit you received with the credit you qualified for.

If your real income came in higher than your estimate, you may have received too much. The difference is the excess advance payment, and you owe it back with your return.

For a W-2 employee with a steady salary, the estimate is nearly always right. For someone whose income swings, it's a coin flip with real money attached.

Why the old safety net matters here

For years, repayment of excess advance credits was capped for households below a certain income, which softened the landing. Under legislation passed in 2025, those repayment caps were eliminated starting with the 2026 tax year. The enhanced subsidies that were temporarily boosted in recent years also expired after 2025, which brought back the income ceiling, the so-called subsidy cliff, at 400% of the federal poverty level.

Rules in this area change often, so check the current thresholds on the IRS and HealthCare.gov sites before you decide anything. But the direction is clear: the cost of a bad estimate has gone up, and the cushion has gotten thinner. A freelancer whose income lands a few thousand dollars past a threshold could be repaying a substantial share of a year's worth of subsidies.

What actually counts as your income

The number the marketplace wants is your modified adjusted gross income, or MAGI. For most freelancers, that's close to your adjusted gross income on Form 1040 with a few add-backs. It is not your gross revenue, and it is not your take-home pay.

Here's where self-employed people go wrong in both directions:

  • They use revenue. If you invoiced $90,000 but have $30,000 in legitimate business expenses, your net profit is $60,000, and that's the starting point. Estimating from revenue can make you look richer than you are and cost you subsidy you were entitled to.
  • They forget the deductions that lower MAGI. The deduction for half your self-employment tax, contributions to a SEP-IRA or solo 401(k), and HSA contributions all reduce your adjusted gross income. Planning to make them changes the number you should report.
  • They forget the income that isn't on a 1099. Interest, dividends, capital gains, unemployment benefits, and your spouse's wages all flow into household income for this purpose.

There's also a wrinkle for freelancers: the self-employed health insurance deduction is itself calculated from your premiums, which are affected by the credit, which depends on your income. The IRS provides a worksheet in the Form 7206 and Publication 974 materials to untangle that loop. It's tedious, but it's why a back-of-envelope guess is riskier than it looks.

The mistake isn't the estimate. It's never revisiting it.

No one can predict a freelance year in November. You're not expected to. The marketplace lets you update your income estimate at any time during the year, and the change adjusts your monthly advance payment going forward.

This is the part most people skip, because the system doesn't prompt you. A big contract lands in June. A client doubles your retainer. Your income jumps, your estimate stays frozen, and every month you keep collecting a subsidy sized for a smaller earner. Nothing feels wrong until the following spring.

The reverse also happens. A slow year means you may be entitled to more credit than you're receiving. You could be overpaying premiums all year just to get the difference back as a refund later.

There's a useful parallel with estimated taxes. You already know you have to adjust your quarterly payments as your income changes. The subsidy works the same way, with the same logic: the system runs on your prediction, and reality settles the account later. It's the same habit applied to a second ledger.

Your next moves

You can do all of these in an afternoon.

  • Pull your year-to-date net profit. Add up your income so far and subtract your business expenses. That's your real starting point, not revenue and not the figure you hoped for in January.
  • Project the rest of the year in two scenarios. Write a conservative number and an optimistic one. If the gap between them straddles a subsidy threshold, you have a decision to make, not a guess.
  • Log in to your marketplace account and compare. Check the income currently on file against your projection. If they differ by more than a modest amount, update it now, because the adjustment only affects the months that remain.
  • Look at your MAGI-lowering moves before December 31. A solo 401(k) or SEP-IRA contribution, an HSA contribution, or any deduction you were planning anyway can move your MAGI. Run the numbers on the credit before and after, since the combined effect can be larger than the tax savings alone.
  • Find your January paperwork. When Form 1095-A arrives, keep it with your tax records and don't file until you've matched it against your real income on Form 8962. If your records are unclear, ask a preparer who handles marketplace reconciliations.

A year with two moving numbers

The deeper lesson is that freelance finance has more than one forecast hiding in it. There's what you'll owe the IRS, and there's what your health subsidy assumes you earn. Both are built from the same raw material, your net profit as it accumulates through the year, and both punish you for ignoring it until the spring.

That's the thread we kept tugging on while building Payday. It connects to your Stripe account or bank, keeps a running view of what you've actually earned, calculates your Q1 through Q4 estimated payments, and nudges you before each deadline. A live, honest net-income figure turns out to be handy for more than tax payments: it's the number you'd want in front of you when you decide whether your marketplace estimate still holds. If you'd like that figure without the spreadsheet, you can take a look at https://payday.lumenlabs.works.