Your income details
Form 1040 line 11 — before standard/itemized deduction
2026 threshold dashboard
No direct contribution — use Backdoor Roth (MAGI exceeds $168,000)
Use Backdoor Roth IRA Calculator →Not deductible (MAGI exceeds $91,000) — consider Backdoor Roth
IRMAA applies — first tier starts at $109,000 (2026 surcharges use 2024 MAGI)
Use IRMAA Calculator →Up to 85% of SS benefits taxable (above $34,000)
Use Social Security Tax Calculator →HSA has no MAGI limit — but each $1 contributed reduces MAGI, helping with Roth, IRMAA, NIIT thresholds
Use HSA Contribution Calculator →Full QBI deduction available (below $201,775 threshold)
Use QBI Deduction Calculator →Full $40,400 SALT cap available (MAGI below $505,000)
Use SALT Deduction Calculator →Partial deduction — phase-out: $100,000–$200,000 (10% per $1k over threshold)
Use Car Loan Interest Deduction Calculator →What is How to Use the MAGI Calculator?
Modified Adjusted Gross Income (MAGI) is your AGI with certain deductions added back. There is no single MAGI — the IRS uses a slightly different version for each tax benefit. This calculator uses the most common definition (AGI plus IRA deductions, student loan interest, tax-exempt interest, and foreign income) and checks your result against all 9 major 2026 income thresholds in one place — including the new OBBBA car loan interest deduction phase-out.
How to Use
- Enter your Adjusted Gross Income (AGI) — found on line 11 of Form 1040. If estimating, use your expected total income minus above-the-line deductions.
- Add any IRA deductions, student loan interest, or other amounts that get added back for MAGI purposes.
- Enter tax-exempt interest (used in Social Security and IRMAA MAGI calculations).
- Select your filing status to see the correct thresholds for each benefit.
- Review the threshold dashboard — green means you're below the limit, amber means you're in a phase-out zone, red means a limit or surcharge applies.
Why Use This Tool?
Tips & Best Practices
- HSA contributions reduce MAGI dollar-for-dollar — each $1 can push you below multiple thresholds simultaneously.
- A Roth conversion INCREASES MAGI — always model the full impact across all thresholds before converting.
- QCDs (Qualified Charitable Distributions) are excluded from MAGI entirely for IRA owners 70½+, unlike regular donations which are only deductions.
- IRMAA uses your MAGI from 2 years ago — if your income dropped significantly, you can appeal your 2026 premium using 2025 or 2024 actual income.
- MFS (Married Filing Separately) almost always has much lower thresholds, making this status very costly for high earners with investment income.
Frequently Asked Questions
What is the difference between AGI and MAGI?
AGI is your gross income minus above-the-line deductions. MAGI adds some of those deductions back — specifically the ones the IRS wants to count for a particular benefit. For most people, AGI ≈ MAGI. Common add-backs: IRA deductions, student loan interest, excluded foreign income, tax-exempt interest, and passive activity losses.
Which MAGI threshold should I focus on most?
IRMAA is the highest-stakes cliff — crossing a tier by even $1 can add $924–$3,624 per year to your Medicare premiums. NIIT is also a cliff ($0 to 3.8% of investment income). The Roth IRA and IRA deduction limits are "slopes" — the phase-out is gradual over a $10,000–$20,000 range.
How can I reduce my MAGI?
Key MAGI reducers: (1) HSA contributions — up to $4,400/$8,750 in 2026, (2) Pre-tax 401k/403b contributions, (3) SEP-IRA or Solo 401k contributions if self-employed, (4) QCDs if over 70½ (up to $108,000, excluded from AGI entirely), (5) Timing capital gains realizations, (6) Loss harvesting to offset capital gains.
Does a Roth conversion increase my MAGI?
Yes — every dollar converted from a traditional IRA to a Roth IRA is added to your AGI and therefore your MAGI. A large Roth conversion can push you into IRMAA territory, trigger NIIT, increase Social Security taxability, and phase out your QBI deduction simultaneously. Always model the full impact across all thresholds before converting.