What is Modified Adjusted Gross Income (MAGI)?

MAGI is your Adjusted Gross Income (AGI) with certain IRS-specified deductions added back. Formula: MAGI = AGI + IRS add-backs. It determines eligibility for Roth IRAs, IRA deductions, ACA credits, and Medicare surcharges — and does not appear on your tax return.

2026 key thresholds: Roth IRA phase-out starts at $153,000 (single) / $242,000 (married filing jointly). Traditional IRA deduction phase-out starts at $81,000 (single) / $129,000 (MFJ).

2026 IRS MAGI Phase-Out Thresholds — At a Glance

Thresholds are for the 2026 tax year. IRS adjusts most figures annually for inflation.

Key Facts at a Glance

What Is MAGI?

Modified Adjusted Gross Income is not a line on your tax return. It is a calculated figure the IRS derives from your AGI by adding back specific deductions or excluded income — depending on which tax provision it is being used to evaluate.

The IRS created MAGI because standard AGI can be reduced below what the IRS considers your true financial capacity. For example, someone who earns $130,000 and deducts $10,000 in student loan interest has an AGI of $120,000 — but the IRS may add that $10,000 back when testing Roth IRA eligibility, giving a MAGI of $130,000.

This matters because eligibility phase-outs for retirement accounts, healthcare subsidies, and deductions are all tested against MAGI — not your paycheck, not your AGI, and not your taxable income.

Why MAGI Exists

The IRS designed MAGI to create a more consistent measure of income when evaluating whether someone truly qualifies for a tax benefit. Without it, high-income taxpayers could use deductions to artificially lower their apparent income and claim benefits intended for lower-income households.

MAGI vs AGI — Key Differences

MAGI and AGI are not the same — MAGI starts with your AGI and adds back specific income items depending on which IRS tax benefit is being evaluated.

What AGI Includes

AGI is calculated by taking your gross income (wages, self-employment income, investment gains, rental income, etc.) and subtracting above-the-line deductions such as:

• Student loan interest paid
• Contributions to a traditional IRA (if deductible)
• Self-employed health insurance premiums
• Health Savings Account (HSA) contributions
• Half of self-employment tax

To understand how deductions reduce your income below AGI, see our guide on standard deduction vs itemized deductions.

What MAGI Adds Back

Depending on the rule being applied, MAGI may add back:

• Student loan interest deduction
• Tuition and fees deduction
• Foreign earned income exclusion
• Foreign housing exclusion
• Tax-exempt interest income (e.g., municipal bonds)
• Excluded employer-provided adoption benefits
• Passive rental activity losses
• IRA deductions (for certain tests)
• Certain self-employment deductions

Important: Not all of these are added back in every MAGI calculation. The specific add-backs depend entirely on which IRS provision you are applying.

Does MAGI Include the Standard Deduction?

No. MAGI does not include or subtract the standard deduction.

This is one of the most common points of confusion. Here is why:

• The standard deduction is a below-the-line deduction — it reduces your taxable income, not your AGI.
• MAGI is derived from AGI — which is calculated before the standard deduction is applied.
• Therefore, your standard deduction ($15,000 for single filers in 2026; $30,000 for married filing jointly) has zero effect on your MAGI.

The Income Hierarchy

Gross Income
↓ minus above-the-line deductions
Adjusted Gross Income (AGI) ← Line 11, Form 1040
↓ plus certain add-backs (varies by rule)
Modified Adjusted Gross Income (MAGI) ← Not on Form 1040
↓ minus standard or itemized deductions
Taxable Income ← Line 15, Form 1040

The IRS designed it this way deliberately. Without MAGI, a high-income taxpayer could stack below-the-line deductions to qualify for benefits intended for lower-income households. MAGI closes that gap by measuring income before those deductions apply.

How MAGI Is Calculated

There is no single MAGI formula — the calculation changes based on which IRS tax provision you are evaluating, which is why MAGI for a Roth IRA differs from MAGI for ACA premium credits.

The process is the same every time. Here are the steps for the most common case: Roth IRA eligibility.

Step 1 — Find your AGI
Open your Form 1040 and look at Line 11. This is your Adjusted Gross Income and your starting point for every MAGI calculation.

Step 2 — Add back your student loan interest deduction
Even if the IRS allowed you to deduct it above-the-line, it counts toward your MAGI when testing Roth IRA eligibility. Find the amount on Schedule 1, Line 21.

Step 3 — Add back any foreign earned income or housing exclusions
If you claimed exclusions on Form 2555, add those amounts back in full.

Step 4 — Add back tax-exempt interest
Municipal bond interest that never appeared in your gross income still counts toward your Roth IRA MAGI. Check Line 2a of your Form 1040.

Step 5 — Add back excluded employer adoption benefits
If your employer paid adoption assistance that was excluded from your income, add it back here.

Step 6 — Compare your result to the IRS threshold
For 2026: full contribution allowed below $153,000 (single) or $242,000 (MFJ). Phase-out applies from $153,000–$168,000 (single) or $242,000–$252,000 (MFJ).

Worked Example

Say your AGI is $148,000 and you deducted $2,500 in student loan interest on your return. Your Roth IRA MAGI is $148,000 + $2,500 = $150,500. That is still below the $153,000 floor, so a full $7,500 contribution is allowed.

Now say you also had $3,000 in municipal bond interest that didn’t show up in your AGI. Add that in too: $148,000 + $2,500 + $3,000 = $153,500. You are now inside the phase-out range and your contribution will be reduced.

For ACA premium tax credits, the formula differs — you also add back non-taxable Social Security benefits. For Medicare IRMAA, the IRS uses your tax return from two years prior. Each provision has its own list; the relevant IRS publication for that benefit specifies exactly which items to include.

MAGI Calculation by Tax Provision

For Roth IRA Contributions (2025 Thresholds)

The IRS sets Roth IRA income limits annually. Here are the 2025 phase-out ranges:

MAGI for Roth IRA = AGI

• Student loan interest deduction
• Foreign earned income/housing exclusion
• Employer-provided adoption benefits excluded from income
• Tax-exempt interest income

For Traditional IRA Deductibility

If you or your spouse are covered by a workplace retirement plan, your traditional IRA deduction phases out based on MAGI. If you are also maximising workplace plan contributions, review the 401k contribution limits alongside these MAGI thresholds for a complete retirement planning picture.

2025 Phase-Out Ranges:

For ACA Premium Tax Credits

MAGI for premium tax credits includes:

• AGI
• Non-taxable Social Security benefits
• Tax-exempt interest
• Foreign earned income excluded from income

Households earning between 100% and 400% of the Federal Poverty Level (FPL) generally qualify for credits, with extended eligibility under current law.

For Medicare IRMAA Surcharges

Higher-income Medicare beneficiaries pay Income-Related Monthly Adjustment Amounts (IRMAA). This MAGI is based on your tax return from 2 years prior. You can review current Medicare IRMAA premium thresholds on Medicare.gov.

• 2025 IRMAA applies to single filers with MAGI above $106,000 and married filers above $212,000 (2023 return)

MAGI Calculator Walkthrough

There is no single “MAGI calculator” because the formula changes by provision. However, here is a practical walkthrough for the most common use case — Roth IRA eligibility.

Example 1: Single Filer

Example 2: Married Filing Jointly — Near the Limit

In Example 2, the taxpayer likely assumed they qualified for a full Roth contribution based on wages alone — but investment income pushed them into the phase-out range.

What Is MAGI for Roth IRA?

For Roth IRA eligibility, MAGI equals your AGI plus student loan interest, tax-exempt interest, and foreign income exclusions — and in 2025, single filers above $165,000 cannot contribute directly at all.

Roth IRA eligibility is one of the most common reasons taxpayers need to understand MAGI. The contribution limit for 2026 is $7,500 ($8,600 if age 50 or older), but your ability to contribute directly to a Roth IRA depends entirely on your MAGI.

For Roth IRA purposes, MAGI is your AGI with these specific items added back:

• Student loan interest deduction
• Foreign earned income and housing exclusions (Form 2555)
• Tax-exempt interest income such as municipal bond interest
• Excluded employer-provided adoption benefits

For most people with none of those, MAGI and AGI are the same number.

In 2026, the limits are:

• Full contribution if MAGI is below $153,000 (single) or $242,000 (married filing jointly)
• Partial contribution between $153,000–$168,000 (single) or $242,000–$252,000 (MFJ)
• No direct contribution above $168,000 (single) or $252,000 (MFJ)

How the Phase-Out Works

If your MAGI falls within the phase-out range, your maximum contribution is reduced proportionally. The formula:

Reduced Contribution = $7,500 × (1 – [(Your MAGI – Phase-Out Floor) ÷ Phase-Out Range Width])

For a single filer with MAGI of $160,500:

• Phase-out floor: $153,000
• Range width: $15,000
• Reduction ratio: ($160,500 – $153,000) ÷ $15,000 = 50%
• Allowed contribution: $7,500 × 50% = $3,750

What If You Exceed the Roth MAGI Limit?

You have two main options:

1. Backdoor Roth IRA — Contribute to a non-deductible traditional IRA, then convert to Roth. No income limit applies to conversions (note: pro-rata rules may apply if you have other traditional IRA balances).
2. Employer plan Roth contributions — If your employer offers a Roth 401(k) or Roth 403(b), there are no income limits for those contributions.

Common Mistake: Contributing Before Knowing Final MAGI

Many taxpayers make Roth contributions early in the year based on estimated income, then discover at filing that their actual MAGI exceeded the limit. This results in an excess contribution, which carries a 6% excise tax annually until corrected. Always verify your projected MAGI before contributing — or wait until after December 31 when you have a clearer picture of your income.

MAGI Tax Implications — Where It Matters

MAGI affects far more than retirement accounts. Here is a full breakdown of where your MAGI tax situation matters most:

Retirement Contributions

• Roth IRA direct contribution eligibility
• Traditional IRA deduction eligibility (if covered by a workplace plan)
• Saver’s Credit (Retirement Savings Contributions Credit)

Healthcare

• ACA Marketplace premium tax credit eligibility
• ACA cost-sharing reduction eligibility
• Medicare Part B and Part D IRMAA surcharges

Education

• American Opportunity Tax Credit (phases out at $80,000–$90,000 single / $160,000–$180,000 joint)
• Lifetime Learning Credit (same phase-out range as above)
• Student loan interest deduction (phases out at $80,000–$95,000 single / $165,000–$195,000 joint for 2025)
• Coverdell ESA contribution eligibility

Investment & Real Estate

• Passive activity loss deductions for real estate bookkeeping services and rental real estate (up to $25,000 allowed for AGI/MAGI under $100,000; phases out at $150,000)
• Net investment income tax (3.8% NIIT applies above $200,000 single / $250,000 joint — based on lesser of net investment income or MAGI over threshold)

Child and Family Benefits

• Child Tax Credit phase-out begins at $200,000 (single) / $400,000 (joint)
• Adoption credit phase-outs

Common MAGI Reporting Mistakes

Even careful taxpayers frequently make these errors:

1. Using AGI When MAGI Is Required

Assuming AGI and MAGI are interchangeable can lead to incorrectly claiming a deduction or making an ineligible contribution. Always identify the specific add-backs required for the provision you are evaluating.

2. Forgetting Tax-Exempt Interest Income

Municipal bond interest does not appear prominently on most tax documents, but it is added back in several MAGI calculations — most notably for Roth IRA eligibility and ACA premium credits.

3. Missing Capital Gains Distributions from Mutual Funds

Year-end capital gains distributions from mutual funds are taxable and often surprise taxpayers. These increase AGI (and therefore MAGI) even if you did not sell any shares.

4. Not Accounting for Self-Employment Income Swings

Freelancers and business owners often have unpredictable income. A strong final quarter can push year-end MAGI above phase-out thresholds after contributions or enrollments have already been made.

5. Misclassifying K-1 Income

Pass-through income from partnerships, S-corporations, or trusts reported on Schedule K-1 flows into AGI and affects MAGI. Misclassifying this income — or missing the K-1 entirely — distorts the calculation.

6. Not Updating Marketplace Income Estimates

If you receive ACA premium tax credits during the year based on projected income, and your actual MAGI is higher at filing, you may owe back some or all of the credits received.

How Finance Teams Monitor MAGI

For business owners, self-employed professionals, and high-income earners, MAGI planning is year-round work — not just a filing-season exercise.

Quarterly MAGI Review Checklist

• Review YTD income against prior-year MAGI thresholds
• Track capital gain distributions expected before year-end
• Project bonus or variable compensation timing
• Review pass-through income estimates from partnerships or S-corps
• Confirm retirement contribution pace against projected MAGI
• Evaluate whether Roth conversion amounts will trigger phase-outs

Strategic Timing Decisions Affected by MAGI

Capital gains harvesting — Realizing long-term gains in a year when MAGI is below the 0% capital gains bracket saves tax and does not push MAGI as high as ordinary income would.

Roth conversions — Converting traditional IRA funds to Roth increases MAGI in the conversion year. Planning the conversion amount carefully prevents unintended loss of deductions or credits.

Bonus deferral — Executives or business owners who can influence the timing of income may defer compensation to keep MAGI below key thresholds.

HSA contributions — Maximizing HSA contributions reduces AGI (and often MAGI) dollar for dollar, with triple tax advantages.

Conclusion

Modified Adjusted Gross Income is one of the most consequential numbers in your tax profile — yet it never appears directly on your tax return. It determines whether you can contribute to a Roth IRA, how much of your traditional IRA contribution is deductible, whether you qualify for healthcare subsidies, and whether you owe Medicare surcharges.

The critical point for taxpayers and finance teams is that MAGI is not one calculation — it is a family of calculations, each with its own specific add-backs depending on the IRS provision involved. Using the wrong formula means you could be over-contributing, missing deductions, or making planning decisions based on inaccurate numbers.

Year-round awareness of how income events affect your MAGI — especially bonuses, investment distributions, Roth conversions, and self-employment swings — is the most reliable way to avoid costly surprises at filing time.

FAQs

What is the difference between AGI and MAGI?

AGI (Adjusted Gross Income) is found on Line 11 of Form 1040. It is your gross income minus above-the-line deductions. MAGI starts with AGI and adds back specific items — such as student loan interest, tax-exempt interest, and foreign income exclusions — depending on which IRS rule is being applied. For many taxpayers with no foreign income and no student loan deduction, MAGI and AGI may be identical.

Does MAGI include the standard deduction?

No. The standard deduction is subtracted from AGI to arrive at taxable income. MAGI is derived from AGI before the standard deduction is applied. Your standard deduction has no effect on your MAGI.

What is MAGI for a Roth IRA in 2026?

For Roth IRA purposes, MAGI equals AGI plus any student loan interest deduction, tuition deductions, foreign income exclusions, and tax-exempt interest income you have added back. In 2026, the Roth IRA phase-out range is $153,000–$168,000 for single filers and $242,000–$252,000 for married filing jointly.

How do I calculate my MAGI?

Start with your AGI (Form 1040, Line 11). Then identify which tax benefit you are evaluating and add back the specific items the IRS requires for that provision. For Roth IRA purposes, the most common add-backs are student loan interest and tax-exempt interest. Tax software handles this automatically, but manually reviewing the underlying income data is recommended, especially for variable-income earners.

Is there a MAGI calculator I can use?

Tax preparation software (TurboTax, H&R Block, FreeTaxUSA) automatically calculates your MAGI for each applicable provision during the return preparation process. For mid-year planning, you can use an IRS worksheet or consult the relevant IRS publication for the specific deduction or credit you are evaluating. A tax advisor can also run a MAGI projection using your estimated year-end income.

Can investment income push me above a MAGI threshold?

Yes — and this is one of the most common surprises taxpayers encounter. Dividends, capital gain distributions, interest income, and gains from selling investments all increase your AGI, which flows directly into your MAGI. Even if your salary stayed the same, a strong investment year could push you above Roth IRA eligibility limits or cause Medicare premium surcharges.

What happens if my Roth IRA contribution exceeds my MAGI limit?

You have made an excess contribution, which is subject to a 6% excise tax for every year the excess remains in the account. You can correct this by withdrawing the excess contribution (plus earnings) before the tax filing deadline, or by recharacterizing the contribution as a non-deductible traditional IRA contribution. Timely correction avoids ongoing penalties.

Does MAGI affect Social Security benefits?

Not directly — Social Security taxability is based on combined income (AGI + non-taxable Social Security + tax-exempt interest), which is a related but different formula. However, MAGI does affect Medicare IRMAA surcharges, which can increase your Part B and Part D premiums significantly if your income crosses the relevant thresholds.

Content reviewed and updated June 2026. IRS thresholds and phase-out ranges are subject to annual adjustments. Consult a qualified tax professional for guidance specific to your situation.