Calculate Modified Adjusted Gross Income (MAGI) with all IRS add-back items and see impacts on Roth IRA, IRA deduction, NIIT, IRMAA, and ACA eligibility.
Modified Adjusted Gross Income (MAGI) is your Adjusted Gross Income (AGI) with certain deductions and exclusions added back in. While AGI appears on line 11 of your Form 1040, MAGI is used by the IRS to determine eligibility for critical tax benefits including Roth IRA contributions, traditional IRA deductions, the Premium Tax Credit (ACA subsidies), and Medicare IRMAA surcharges.
Different IRS provisions use slightly different MAGI calculations, but the most common add-back items include student loan interest deductions, foreign earned income exclusions, tax-exempt interest from municipal bonds, and passive activity losses. Understanding your MAGI is essential for year-end tax planning, especially for higher-income earners approaching phase-out thresholds.
This calculator computes your MAGI with all standard IRS add-back items and shows exactly how it affects your eligibility for major tax benefits. It provides clear pass/fail indicators for each threshold and highlights phase-out ranges where partial benefits may be available. Check the example with realistic values before reporting.
MAGI determines eligibility for Roth IRA contributions, IRA deductions, ACA subsidies, Medicare premiums, and more. Knowing your exact MAGI helps you make strategic decisions about retirement contributions, investment timing, and Roth conversion planning. Keep these notes focused on your operational context. Tie the context to the calculator’s intended domain. Use this clarification to avoid ambiguous interpretation.
MAGI = AGI + Student Loan Interest Deduction + Tuition Deduction + Foreign Earned Income Exclusion + Foreign Housing Exclusion + EE Bond Interest Exclusion + Adoption Expense Exclusion + Passive Activity Loss + Tax-Exempt Interest
Result: MAGI = $88,500
AGI of $85,000 plus $2,500 student loan interest and $1,000 muni bond interest gives a MAGI of $88,500. This is below the Roth IRA phase-out ($146K) so full Roth contributions are allowed.
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AGI is your total income minus above-the-line deductions (IRA contributions, student loan interest, etc.). MAGI adds some of those deductions back in. For many people with no special exclusions, MAGI equals AGI.
The IRS uses MAGI to determine Roth IRA contribution eligibility. For 2024, single filers with MAGI over $161,000 and MFJ filers over $240,000 cannot contribute directly to a Roth IRA.
Income-Related Monthly Adjustment Amount (IRMAA) is a Medicare surcharge on Part B and D premiums for higher-income beneficiaries. It uses MAGI from two years prior — so 2024 income affects 2026 premiums.
Yes — municipal bond interest is excluded from AGI but added back for most MAGI calculations. This can affect ACA premium credits and Social Security taxation even though the interest itself is tax-free.
The Net Investment Income Tax (3.8%) applies when MAGI exceeds $200,000 (single) or $250,000 (MFJ). It applies to investment income like capital gains, dividends, rental income, and interest.
Strategies include maximizing 401(k)/403(b) contributions, HSA contributions, and self-employment deductions. Capital loss harvesting and charitable giving can reduce AGI, which in turn lowers MAGI.