Florida MAGI and ACA Health Insurance Subsidies — What Counts as Income? 2026

Q: Does Social Security income count toward ACA MAGI?

Partially. The taxable portion of Social Security benefits is included in your AGI and therefore counts toward MAGI. Additionally, the ACA adds back non-taxable Social Security benefits when calculating MAGI for subsidy eligibility. So in practice, most Social Security recipients should include the full amount of their Social Security benefits when estimating ACA MAGI, not just the taxable portion. This catches many Social Security recipients off guard — they assume untaxed SS is invisible to the ACA, but it's added back in the MAGI calculation.

Q: Do capital gains from selling a home count as income for ACA subsidies?

Capital gains from selling a home count if they exceed the home sale exclusion. Federal law allows you to exclude up to $250,000 in capital gains ($500,000 for married couples) from the sale of a primary residence you owned and lived in for at least 2 of the last 5 years. Gains above that exclusion are taxable capital gains and count toward MAGI. If your gain is fully excluded, it does not affect your ACA subsidies. A large gain above the exclusion, however, can push your MAGI significantly higher than expected in the year of the sale.

Q: If I'm self-employed, what income figure do I use for ACA marketplace enrollment?

Use your estimated net self-employment income — your gross business revenue minus legitimate business deductions — as reported on Schedule C of your federal return. This is your net profit, which is what flows into your AGI. Do not use gross revenue. Also remember to subtract the self-employment tax deduction (half of SE tax) and any other above-the-line deductions you take, since MAGI for ACA purposes is your AGI adjusted by adding back a few specific items (tax-exempt interest, non-taxable Social Security, excluded foreign income). For most self-employed Floridians, net SE income after the self-employment tax deduction is a reasonable MAGI starting estimate.

Q: What's the difference between MAGI and taxable income?

MAGI (Modified Adjusted Gross Income) is your Adjusted Gross Income plus certain add-backs: tax-exempt interest income, the non-taxable portion of Social Security benefits, and excluded foreign income. Taxable income is your AGI minus your standard or itemized deduction and any qualified business income deduction. Taxable income is always lower than MAGI. For ACA purposes, what matters is MAGI — not taxable income — because ACA subsidy calculations don't account for your personal deductions. This is why someone with significant itemized deductions can still have a high MAGI and owe back subsidies.

When you apply for ACA marketplace coverage and enter your household income, the system isn't asking for your take-home pay or your taxable income. It's asking for your MAGI — Modified Adjusted Gross Income — which is a specific IRS calculation that doesn't always match what people think of as their "income." Getting this number wrong in either direction creates problems: underestimate and you owe money back at tax time; overestimate and you pay more in premiums than necessary.

For Floridians who are self-employed, retired, receiving Social Security, or navigating a year with unusual income events, understanding exactly what MAGI includes is essential to using the marketplace correctly.

What MAGI Actually Is

For ACA purposes, MAGI is calculated as your Adjusted Gross Income (AGI) plus three specific add-backs:

Tax-exempt interest income — interest from municipal bonds and similar instruments that is excluded from your regular income but added back for MAGI purposes.
Non-taxable Social Security benefits — the portion of Social Security that you don't pay income tax on is still added back into MAGI for ACA subsidy calculations.
Excluded foreign income — income excluded under the Foreign Earned Income Exclusion (Form 2555) is added back.

Your AGI is itself the result of gross income minus above-the-line deductions — things like HSA contributions, self-employment tax deduction, IRA deductions, and the self-employed health insurance deduction. These deductions do reduce your MAGI, which is why they're useful planning tools for marketplace shoppers.

Income That Counts Toward ACA MAGI

Income Source	Counts Toward MAGI?
Wages and salaries (W-2)	Yes — full amount
Self-employment net income (Schedule C)	Yes — net profit after business deductions
Interest income (taxable)	Yes
Tax-exempt interest (municipal bonds)	Yes — added back to AGI for MAGI
Dividend income	Yes
Capital gains (including real estate gains above exclusion)	Yes
Rental income (net of expenses)	Yes
Alimony received (divorces finalized before Jan 1, 2019)	Yes — older alimony agreements
Taxable Social Security benefits	Yes — included in AGI
Non-taxable Social Security benefits	Yes — added back for MAGI
IRA distributions (traditional IRA withdrawals)	Yes — taxable distributions
Pension / retirement distributions	Yes — taxable portion
Unemployment compensation	Yes

Income That Does NOT Count Toward ACA MAGI

Several common income sources are genuinely excluded from MAGI and do not affect your ACA premium tax credit calculation:

Child support received — not taxable income, not included in MAGI.
Gifts and inheritances — not taxable to the recipient, not included in MAGI.
Workers' compensation — excluded from federal income tax and MAGI.
Veterans' disability payments — excluded from gross income and MAGI.
Foster care payments — excluded from income for MAGI purposes.
Roth IRA distributions — qualified distributions from a Roth IRA are not included in gross income and do not affect MAGI.
Loans (including reverse mortgages) — loan proceeds are not income.
Alimony from post-2018 divorces — under the Tax Cuts and Jobs Act, alimony from divorces finalized after December 31, 2018 is no longer deductible by the payer or taxable to the recipient.

Social Security Catches People Off Guard

Many retirees don't realize that even the non-taxable portion of their Social Security benefits is added back into MAGI for ACA purposes. A Floridian receiving $24,000/year in Social Security where only $8,000 is taxable for income tax purposes still counts all $24,000 toward their ACA MAGI. This is one of the most common reasons retirees end up with a higher MAGI — and lower subsidies — than they expected.

Estimating MAGI for Self-Employed Floridians

If you're self-employed, estimating your ACA income involves a few layers:

Start with your projected gross business revenue for the year.
Subtract legitimate business deductions (Schedule C expenses) to get net profit.
Subtract half of self-employment tax (this is an above-the-line deduction from your net SE income).
Subtract any HSA contributions you plan to make (these reduce AGI).
Subtract the self-employed health insurance deduction if applicable.
Add any other income sources (investment income, rental income, etc.).
The result is approximately your MAGI for ACA marketplace purposes.

This estimate will never be exact when you're projecting a future year, but the goal is a close-enough estimate that the reconciliation on your tax return doesn't produce a large surprise in either direction. For a detailed plan comparison based on your estimated income, floridaplanfinder.com walks through Florida plan options at different income levels.

Roth Conversions and Capital Gains: The MAGI Traps

Two income events that frequently push Florida ACA enrollees into higher-than-expected MAGI territory:

Roth IRA conversions

Converting traditional IRA funds to Roth adds the converted amount directly to your MAGI in the conversion year. A $30,000 Roth conversion in a year when you're receiving ACA subsidies could push your MAGI over a key FPL threshold and reduce or eliminate your credits. Always model the subsidy impact of a Roth conversion before executing it — the lost subsidy value may exceed the tax benefit of the conversion in some years.

Capital gains from investments or real estate

Selling appreciated investments or real estate in a year when you're on the ACA marketplace increases your MAGI by the taxable gain amount. For real estate, gains above the primary residence exclusion ($250,000 single / $500,000 married) are taxable capital gains that count toward MAGI. If you're planning a large real estate sale, consider the ACA subsidy impact as part of the timing analysis.

Above-the-Line Deductions That Help

HSA contributions, traditional IRA contributions (if deductible), the self-employed health insurance deduction, and the self-employment tax deduction all reduce your AGI — and therefore your MAGI — before the subsidy calculation runs. If you're near an important FPL threshold, maximizing these deductions can preserve meaningful premium tax credit value. Work with a licensed agent and a tax advisor to coordinate your contributions and enrollment strategy.

Ready to see what plans and subsidies are available at your estimated income level? Explore Florida marketplace options at floridaplanfinder.com or connect with a licensed Florida agent at GetFloridaCoverage.com.

Frequently Asked Questions

Does Social Security income count toward ACA MAGI?

Partially — and in a way that surprises many people. The taxable portion of Social Security is already in your AGI. The ACA then adds back the non-taxable portion of Social Security for MAGI purposes. In practice, most Social Security recipients should count the full amount of their annual Social Security benefit when estimating ACA MAGI, not just the portion that shows up as taxable on their tax return.

Do capital gains from selling a home count as income for ACA subsidies?

Only gains above the home sale exclusion. Federal law excludes up to $250,000 ($500,000 for married couples) in capital gains from selling a primary residence you've owned and lived in for at least 2 of the last 5 years. Gains above that threshold are taxable capital gains and count toward MAGI. If your gain is fully excluded, it has no effect on your ACA subsidies. A large gain above the exclusion in a year you're on marketplace coverage can significantly increase your MAGI.

If I'm self-employed, what income figure do I use for ACA marketplace enrollment?

Use your estimated net self-employment income — gross revenue minus Schedule C business deductions. Then subtract the SE tax deduction (half of your SE tax), any HSA contributions, and the self-employed health insurance deduction to arrive at your approximate AGI. For ACA MAGI, that AGI is your starting point (adjusted for tax-exempt interest and Social Security if applicable). Use last year's Schedule C as a baseline, then adjust upward or downward based on how you expect this year to go.

Does child support I receive count as income for ACA subsidies?

No. Child support received is not taxable income and is not counted toward MAGI for ACA subsidy purposes. You do not need to include it when estimating your income on HealthCare.gov. This is one of the cleaner exclusions in the MAGI rules.

What's the difference between MAGI and taxable income?

Taxable income is MAGI minus your standard deduction (or itemized deductions) and any Qualified Business Income deduction — it's the figure on which you actually owe income tax. MAGI is higher than taxable income because it doesn't account for those personal deductions. ACA subsidies are based on MAGI, not taxable income. This is why someone with large itemized deductions can still have a high MAGI and owe subsidy repayment at tax time.

SunState Coverage Editorial Team

Florida-based insurance professionals providing plain-language guidance on ACA marketplace plans, subsidy strategy, and health insurance options for Floridians. NPN #21249133.

Sources

IRS — Modified Adjusted Gross Income (MAGI) for ACA purposes
IRS Publication 17 — Your Federal Income Tax
HealthCare.gov — What income counts for marketplace coverage
HHS — 2026 Federal Poverty Level guidelines
IRS Rev. Proc. 2025-19 — 2026 HSA contribution limits

Disclaimer: This article is for general informational purposes and does not constitute tax or insurance advice. MAGI calculations, ACA subsidy rules, and income definitions are subject to IRS and HHS guidance that may change. The examples and tables above are illustrative and may not reflect every income type or tax situation. Consult a licensed insurance professional and a qualified tax advisor before making income reporting decisions for ACA marketplace enrollment.