MAGI Calculator

Understanding Modified Adjusted Gross Income (MAGI)

Modified Adjusted Gross Income (MAGI) is a critical tax metric used by the Internal Revenue Service (IRS) to establish your eligibility for key tax benefits, retirement contributions, and healthcare subsidies. It starts with your Adjusted Gross Income (AGI) and adds back specific tax deductions and tax-exempt income items.

How to Calculate Your MAGI

To determine your MAGI, begin with your AGI (found on line 11 of IRS Form 1040) and add back allowable adjustments:

\[ MAGI = AGI + \sum \text{IRS Tax Add-Backs} \]

Common tax add-backs include:

• Student loan interest deductions.
• Tuition and education expenses deductions.
• Foreign earned income and housing exclusions.
• Qualified U.S. savings bond interest used for higher education.
• Employer-provided adoption assistance exclusions.
• Deductible contributions to traditional IRAs.

Why MAGI Matters for Tax & Retirement Planning

• Roth IRA Eligibility: The IRS enforces income limits for contributing directly to a Roth IRA. Exceeding the MAGI threshold reduces or eliminates your direct contribution limit.
• Traditional IRA Deductibility: If covered by an employer retirement plan, MAGI limits whether your traditional IRA contributions are tax-deductible.
• Healthcare Subsidies: MAGI determines eligibility for Premium Tax Credits (PTC) on the Health Insurance Marketplace (Obamacare).