Modified Adjusted Gross Income Calculator (MAGI) 2026

This modified adjusted gross income calculator starts from your AGI and adds back only the items the IRS lists for the purpose you choose: a Roth IRA contribution, the traditional IRA deduction, the ACA premium tax credit, Medicare IRMAA, the 3.8% net investment income tax, the student loan interest deduction, the One Big Beautiful Bill Act senior, tips, overtime and car loan deductions, or taxable Social Security. It then compares the result with the 2026 limit.

Updated 2026-10-08 · 2026 IRS figures

MAGI for Roth IRA purposes (2026)$150,000Roth IRA contribution limit

Adjusted gross income (Form 1040, line 11a)	$150,000
Roth conversions and rollovers included in income	-$0
Traditional IRA deduction (Schedule 1, line 20)	$0
Student loan interest deduction (Schedule 1, line 21)	$0
Foreign earned income / housing exclusion and housing deduction (Form 2555)	$0
Excluded savings bond interest (Form 8815)	$0
Excluded employer adoption benefits (Form 8839)	$0
MAGI	$150,000
2026 phase-out range	$153,000 – $168,000
Maximum contribution	$7,500
Roth contribution allowed	$7,500

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Key 2026 federal tax facts

For 2026, Social Security tax of 6.2% applies to wages up to $184,500, up from $176,100 in 2025.
Medicare tax of 1.45% applies to all wages with no cap, plus a 0.9% Additional Medicare Tax on wages above $200,000 ($250,000 for married couples filing jointly).
The 2026 standard deduction is $16,100 for single filers, $32,200 for married couples filing jointly, and $24,150 for heads of household.
The seven federal income tax rates of 10%, 12%, 22%, 24%, 32%, 35% and 37% were made permanent by the One, Big, Beautiful Bill Act.
In 2026 the 37% top rate applies to taxable income over $640,600 for single filers and over $768,700 for married couples filing jointly.
The Child Tax Credit is $2,200 per qualifying child for 2026, of which up to $1,700 is refundable.

There is no single MAGI

Modified adjusted gross income is adjusted gross income (Form 1040, line 11a) with certain items added back, or occasionally subtracted, and each tax rule defines its own list. That is why a Roth IRA MAGI and a Medicare MAGI for the same person can differ by tens of thousands of dollars. For many people with no foreign income, tax-exempt interest or untaxed Social Security, MAGI simply equals AGI.

Purpose	Start from AGI and add	Subtract
Roth IRA contributions	Traditional IRA deduction, student loan interest deduction, foreign earned income and housing exclusions, excluded savings bond interest, excluded adoption benefits	Roth conversions and rollovers to a Roth
Traditional IRA deduction	Same add-backs as Roth	—
ACA premium tax credit	Tax-exempt interest, untaxed Social Security, foreign exclusions (plus dependents who must file)	—
Medicare IRMAA	Tax-exempt interest (return from two years earlier)	—
Net investment income tax	Foreign earned income exclusion (net of disallowed deductions)	—
Student loan interest deduction	The student loan deduction itself, foreign exclusions, Puerto Rico / American Samoa income	—
Senior, tips, overtime, car loan (Schedule 1-A)	Foreign exclusions, Puerto Rico / American Samoa income	—
Taxable Social Security	Tax-exempt interest, half of benefits, student loan deduction, savings bond and adoption exclusions, foreign and territory income	Taxable benefits already in AGI

2026 MAGI limits at a glance

Married filing separately is $0 to $10,000 for both IRA tests and gets no student loan or Schedule 1-A deduction. The 2025 Roth range was $150,000 to $165,000 single and $236,000 to $246,000 joint.

Rule	Single / head of household	Married filing jointly
Roth IRA phase-out	$153,000 – $168,000	$242,000 – $252,000
Traditional IRA deduction, covered by a workplace plan	$81,000 – $91,000	$129,000 – $149,000
Student loan interest deduction	$85,000 – $100,000	$175,000 – $205,000
Senior deduction (6% phase-out)	From $75,000	From $150,000
Tips and overtime deductions	From $150,000	From $300,000
Net investment income tax (3.8%)	Over $200,000	Over $250,000
Medicare IRMAA (2026 premiums, 2024 return)	Over $109,000	Over $218,000
ACA premium tax credit, household of 1 / 2	Up to $62,600 (400% of poverty line)	Up to $84,600 for two people

Worked examples

Roth conversion: a single filer has AGI of $175,000, including a $30,000 Roth conversion. Roth MAGI subtracts the conversion, so it is $145,000. That is below the $153,000 start of the phase-out, so $7,500 can still go into a Roth for 2026.
ACA cliff: a married couple, both 63, buy marketplace coverage. AGI is $63,000, with $4,000 of municipal bond interest and $36,000 of Social Security of which $18,000 is taxable. Their premium tax credit MAGI is $85,000, which is 402% of the $21,150 poverty line for two. For 2026 coverage that is over the 400% limit ($84,600), so they get no credit at all and must repay any advance credit in full. $500 less income, for example a smaller IRA withdrawal, would have kept them eligible.
IRMAA: a single retiree had $104,000 of AGI and $9,000 of tax-exempt interest on the 2024 return. IRMAA MAGI is $113,000, over the $109,000 threshold, so the 2026 Part B premium is $284.10 a month instead of $202.90, plus $14.50 on Part D: $1,148.40 extra for the year.
Senior deduction: a married couple, both 67, with $168,000 of Schedule 1-A MAGI each get $4,920 instead of $6,000, $9,840 in total.

Where to find each number on your return

For the premium tax credit, 2026 brings back the 400% cliff, because the enhanced credits expired after 2025, and removes the cap on repaying excess advance credit. A small change in MAGI near the limit, such as a Roth conversion or a capital gain, can cost the whole credit, so check MAGI before taking extra income.

AGI: Form 1040 line 11a for 2025 (repeated as line 11b at the top of page 2).
Tax-exempt interest: line 2a. Social Security benefits: line 6a, taxable part line 6b.
Traditional IRA deduction: Schedule 1 line 20. Student loan interest deduction: Schedule 1 line 21.
Foreign earned income and housing exclusion: Form 2555 line 45; housing deduction line 50.
Schedule 1-A deductions (tips, overtime, car loan interest, seniors): Form 1040 line 13b. They come after AGI, so they never reduce any MAGI.

Frequently asked questions

Is MAGI the same as AGI?

Often, yes. MAGI only differs when you have one of the add-back items for the rule in question, such as tax-exempt interest, untaxed Social Security, foreign earned income or an IRA deduction.

What is MAGI for a Roth IRA in 2026?

AGI minus Roth conversion income, plus the traditional IRA deduction, student loan interest deduction and a few exclusions. Contributions phase out between $153,000 and $168,000 single, $242,000 and $252,000 joint.

Does a 401(k) contribution lower MAGI?

Yes. Traditional 401(k), 403(b) and pre-tax health premium contributions are excluded from wages before AGI, so they reduce AGI and every MAGI built on it.

Which year’s MAGI does Medicare use?

The return from two years earlier. 2026 Part B and Part D premiums use 2024 MAGI. You can ask SSA to use a more recent year after a life-changing event such as retirement.

Do the new tips, overtime and senior deductions lower MAGI?

No. They are taken after AGI on Schedule 1-A, so they lower taxable income but not AGI or MAGI.

Sources

Figures are taken from official government publications and were last reviewed on 2026-10-08.