Data current: September 3, 2026 · Florida · 14 min read
There is one number on your Marketplace application that decides almost everything else, and most people fill it in from memory in about four seconds. It is the household income estimate, and it is the single most common reason a Florida family ends up owing money at tax time.
Here is the part that catches people off guard: the application is not asking what you earned last year. It is asking what you expect to earn during the year you are buying coverage for. For the plan you pick this November, that means your best guess at all of 2027 — a year that has not started yet.
I am Vivian Soto, an independent bilingual insurance agent at VS Healthcare Solutions in Orlando. This guide covers what actually counts as income, how to estimate it when your work is seasonal or self-employed, what the IRS does with the number in April, and how to change it mid-year when life moves. Getting this right is worth more than picking the perfect plan.
Why this one number decides everything else
Your premium tax credit is not a flat discount. It is calculated as the gap between what the government decides your household can reasonably afford and the cost of a benchmark silver plan in your county. Your income estimate sets the first half of that equation, so it sets the credit.
Change the income figure and the credit moves. Move the credit and your monthly premium moves with it. That is why a careless estimate does not produce a small error — it produces an error repeated across twelve monthly payments, and then a correction all at once in April.
The good news is that this is one of the few parts of the process you have direct control over. Plan availability, network decisions and benchmark pricing are all set by other people. Your income estimate is yours, and it is fixable any month of the year.
What actually counts as income
The Marketplace uses modified adjusted gross income, or MAGI. The name sounds technical, and the concept mostly is not: it is your adjusted gross income plus a short list of things added back. What trips people up is not the arithmetic — it is assuming that money which never gets taxed also never gets counted.
| Source | In MAGI? | Note |
|---|---|---|
| Wages, salaries, tips | Counted | Gross, before withholding |
| Net self-employment profit | Counted | After business expenses, not gross receipts |
| Unemployment compensation | Counted | Fully counted |
| Interest, dividends, capital gains | Counted | Includes tax-exempt interest |
| Rental and royalty income | Counted | Net of allowed expenses |
| Social Security retirement | Counted | Even the non-taxable portion is added back |
| Child support received | Not counted | Excluded entirely |
| Supplemental Security Income (SSI) | Not counted | Different from Social Security retirement |
| Workers compensation | Not counted | Excluded entirely |
| Gifts and most inheritances | Not counted | Excluded entirely |
| Qualified Roth withdrawals | Not counted | Traditional IRA withdrawals do count |
| Veterans disability payments | Not counted | Excluded entirely |
Two rows in that table cause most of the confusion I see. Social Security retirement benefits are counted in full for Marketplace purposes, including the portion that is not taxable on your return — that surprises nearly everyone. And self-employment income is counted net, after business expenses, not as gross receipts. A contractor who invoiced $90,000 and had $25,000 in legitimate expenses reports $65,000, not $90,000.
The adjustments that legitimately lower it
Before you decide your estimate is too high to qualify for help, run through the deductions that come off the top. These are not loopholes; they are ordinary line items that many people forget are part of the calculation.
Things that lower the number
- The self-employed health insurance deduction — the premiums you pay for your own Marketplace coverage.
- Contributions to a health savings account, if you are on an HSA-qualified plan.
- Deductible contributions to a traditional IRA or a SEP/SIMPLE plan.
- One half of your self-employment tax.
- Student loan interest you paid during the year.
- Ordinary and necessary business expenses, which come off before net profit is even calculated.
The self-employed health insurance deduction deserves a note, because it is circular in a way that confuses people: the premiums you pay for Marketplace coverage can themselves reduce the MAGI that determines your subsidy for that coverage. If you are self-employed, do not try to solve that loop by hand. It is one of the clearest cases for having someone run the numbers with you.
The self-employed problem: estimating a number you do not have yet
Hospitality, construction, real estate, rideshare, home health, salon work. For those households, “what will you earn in 2027” is a genuinely hard question, not a lazy one.
The instinct is to lowball it, because a lower estimate means a bigger credit and a smaller monthly premium right now. That instinct is expensive. The credit is not forgiven — it is advanced, and it gets settled against reality at tax time.
The opposite instinct, padding the number to be safe, is less painful but still costs you. You pay full freight all year and wait until April to get the difference back.
A method that works for uneven income
Here is the process I walk clients through. It takes about twenty minutes and it holds up under documentation review.
- Start with last year’s tax return. Line for line, it is the most complete record of what your household actually earns. It is a starting point, never the answer.
- Add what you already know is different. A raise that took effect in June, a contract that ended, a spouse who went back to work. These are facts, not guesses.
- For variable income, average three years, not one. A single good year makes you overestimate; a single bad one makes you underestimate. Three years smooths both.
- Subtract the adjustments you are confident about — the self-employed health insurance deduction, HSA and traditional IRA contributions, half of self-employment tax.
- Write the number down with the date. When the Marketplace asks for documentation in March, you will want to know how you got there.
- Put a reminder in your calendar for July. A mid-year check takes ten minutes and is the difference between a small correction and an April surprise.
What happens at tax time: Forms 1095-A and 8962
In January after your coverage year, the Marketplace mails you Form 1095-A. It lists, month by month, which plan you had, what the benchmark premium was, and how much advance credit was paid to your insurer on your behalf.
You use those figures to complete Form 8962 with your tax return. That form compares the credit you actually qualified for — based on your real, final income — against the credit that was advanced. The difference goes one way or the other.
If you took less than you were entitled to, the balance is added to your refund. If you took more, it is added to what you owe. This step is not optional: filing without reconciling can jeopardize your eligibility for advance credits the following year.
The repayment caps — and the one case with no cap
Congress built in a cushion for households that underestimate in good faith. If your final income lands below 400% of the federal poverty level, the amount you can be required to repay is capped, and the cap is smaller the lower your income is. The caps are set by the IRS and adjusted annually.
Above 400% of the federal poverty level, that protection disappears completely. There is no cap, and the entire excess credit becomes repayable. With the enhanced subsidies expired, this threshold matters again in a way it has not for several years.
This is the practical reason I push clients whose income is near that line to estimate carefully and check in mid-year. The difference between landing at 398% and 402% is not a few dollars of subsidy — it is the difference between a capped repayment and an uncapped one.
Life changes that should send you back to the application
An income estimate is not a form you file once. It is a running figure, and the Marketplace expects you to keep it current. Reporting a change costs nothing and takes a few minutes.
| If this happens | Why it moves your subsidy |
|---|---|
| A raise, a new job, or a lost job | Changes wages immediately |
| A very good or very bad quarter | Self-employed profit swings both ways |
| Marriage or divorce | Changes household size and filing status |
| A birth or adoption | Changes household size, which changes your FPL percentage |
| A child no longer a dependent | Shrinks the tax household |
| Starting Medicare mid-year | Removes a person from Marketplace coverage |
| Selling investments or property | Capital gains land in MAGI |
| A traditional IRA or 401(k) distribution | Fully counted in the year taken |
Household size matters as much as dollars here, because your subsidy is set by your income as a percentage of the federal poverty level for your household size. A birth can improve your position at an unchanged salary; a child aging off your return can worsen it.
When the Marketplace asks you to prove it
Sometimes the income you report does not line up with what federal data sources show, and the Marketplace opens what it calls a data matching issue. You get a notice, a list of acceptable documents, and a deadline. This is especially common for self-employed people, whose reported estimate frequently will not match a tax return from a very different year.
What is not routine is ignoring it. If the deadline passes without a response, the Marketplace can adjust or end your advance credit, and the next month’s invoice arrives at the full unsubsidized premium. I have had clients call me in March genuinely convinced their insurer made a billing error, when what actually happened was an unanswered letter in January.
Acceptable proof usually includes recent pay stubs, a signed statement of expected income, last year’s tax return with schedules, a letter from an employer, or bookkeeping records for a business. Send more than the minimum rather than less, keep a copy of what you sent and the date, and upload through your Marketplace account rather than mailing where you can — the upload is timestamped and the mail is not.
One habit prevents nearly all of this pain: when you set your estimate, write down in a sentence or two how you arrived at it. Six months later, when a notice asks you to substantiate the figure, that sentence is the difference between a five-minute task and an afternoon of reconstructing your own reasoning.
A worked example from Orange County
Consider a married couple in Orlando, both 41, with one child. He is on salary at $52,000. She runs a two-person cleaning business that grossed $61,000 last year with about $19,000 in legitimate expenses — supplies, mileage, insurance, a replacement vehicle payment.
The instinct is to report $113,000. The correct starting figure is $52,000 plus $42,000 of net profit, which is $94,000. From there come the adjustments: half of her self-employment tax, the self-employed health insurance deduction for their Marketplace premiums, and a $6,000 traditional IRA contribution they make most years.
The estimate that belongs on the application is meaningfully lower than $113,000, and the difference is not a trick — it is the same math the IRS will run in April. Reporting gross receipts instead of net profit is the single most expensive error I see self-employed Floridians make, and it costs them subsidy they were fully entitled to.
One caution on this example: I have deliberately not published the resulting premium or credit. Those depend on county, ages, plan year and the benchmark plan, and a number that looks precise but does not apply to you is worse than no number at all.
Frequently asked questions about ACA income estimates
Does the application want my 2026 income or my 2027 income?
Your 2027 income — the year the coverage is for. This is the single most common mistake I correct. Last year’s tax return is a useful starting point, but the question being asked is about the year ahead.
What is MAGI, in plain terms?
Modified adjusted gross income. Start with the adjusted gross income from your tax return, then add back tax-exempt interest, any non-taxable Social Security benefits, and excluded foreign income. For most Florida households, MAGI and AGI end up being the same number.
My income changes every month. What do I put?
Your best honest estimate for the full year, then update it whenever reality moves. Averaging your last three years is more reliable than projecting from your best or worst recent month. An estimate you correct in July is never a problem; an estimate you never revisit usually is.
What happens if I estimate too low?
You received more advance premium tax credit than you were entitled to, and you repay the difference when you file. If your final income lands under 400% of the federal poverty level, the repayment is capped. Above 400%, there is no cap and the full excess is owed.
What happens if I estimate too high?
You paid more in premiums each month than you needed to, and the difference comes back to you as a refundable credit when you file. You are not penalized — but you gave the government an interest-free loan for a year, which is money you could have used.
What is Form 1095-A and do I need it?
It is the statement the Marketplace sends every January showing what plan you had and how much advance credit was paid on your behalf. You need it to complete Form 8962, and you cannot correctly file without it. If it does not arrive by mid-February, log in to your Marketplace account and download it.
Do my adult children living at home count?
They count if you claim them as dependents on your tax return. Household size for the Marketplace follows your tax household, not who sleeps in the house. Getting this wrong shifts your federal poverty level percentage and every number downstream of it.
Can I change my income estimate after I enroll?
Yes, and you should. Reporting a change is free, takes a few minutes in your Marketplace account, and adjusts your credit going forward. There is no penalty for updating and no limit on how often you do it.
Why a Florida agent matters when your income is uneven
If you are salaried, your income is steady and your household has not changed, you can very likely handle this on your own. Put down your salary, check it in July, and you are done.
The calculation gets harder when the pieces interact — self-employment profit, a spouse’s variable hours, a Social Security benefit that is not taxable but still counts, a household size that changed mid-year. Those are the cases where a careful half hour in November saves a painful April.
My help costs you nothing extra. Carrier commissions are built into the premium whether you use an agent or enroll alone, so the same plan is the same price either way. What you get is someone who has run this calculation several hundred times, and who will tell you plainly when your estimate looks wrong.
- Internal Revenue Service. Premium Tax Credit — Form 8962 and instructions.
- HealthCare.gov. Reporting income and household changes to the Marketplace. CMS.
- Centers for Medicare & Medicaid Services. Form 1095-A and Marketplace statements. 2026.
- KFF. Analysis of Marketplace premiums and the expiration of enhanced premium tax credits. 2026.
Vivian Soto
Vivian Soto is a Florida-licensed bilingual (English/Spanish) insurance agent serving families across Orange, Osceola, Seminole, Hillsborough, and Miami-Dade counties. She specializes in the ACA Marketplace, Medicare, life insurance, and supplemental coverage — having filed 500+ ACA applications for Florida families and maintained a 91% renewal retention rate. She works directly with 40+ top carriers including Florida Blue, UnitedHealthcare, Humana, Aetna, and Mutual of Omaha.
