Adjusted Gross Income (AGI)

Quick Definition

Adjusted Gross Income (AGI) is the number on your Form 1040 that represents your total gross income from all sources minus specific above-the-line adjustments. AGI serves as the baseline for calculating your taxable income and determines your eligibility for dozens of tax benefits, from Roth IRA contributions to the Saver's Credit.

What It Means

A single number on your tax return controls whether you can contribute to a Roth IRA, whether you can deduct traditional IRA contributions, how much of your Social Security is taxable, and whether you qualify for certain tax credits. That number is your AGI.

AGI sits between your total income and your taxable income on the tax form. The calculation flows in three steps:

1. Total income: Add up all sources of income (wages, self-employment income, interest, dividends, capital gains, retirement distributions, rental income, and other income)
2. Adjustments: Subtract above-the-line deductions (also called adjustments to income)
3. AGI: The result is your adjusted gross income

From AGI, you then subtract either the standard deduction or itemized deductions to arrive at taxable income, which is what actually gets taxed at your tax bracket rates.

The distinction between above-the-line adjustments (which reduce AGI) and below-the-line deductions (which reduce taxable income but not AGI) matters because so many tax rules use AGI as a threshold. Lowering your AGI opens doors to tax benefits that would otherwise phase out.

How It Works

Step 1: Calculate Total Income

Start with every dollar you earned during the tax year. For 2026 (returns filed in 2027), this includes:

Schedule 1 captures income that does not fit on the main form: business income (Schedule C), capital gains not requiring Schedule D, rental and royalty income (Schedule E), farm income, unemployment compensation, and other miscellaneous income.

Step 2: Subtract Above-the-Line Adjustments

Above-the-line adjustments reduce your total income to arrive at AGI. These adjustments are available regardless of whether you itemize or take the standard deduction. The most common adjustments for 2026 include:

Some adjustments have income phase-outs. The traditional IRA deduction, for example, phases out based on your modified AGI if you or your spouse are covered by a workplace retirement plan like a 401(k).

Step 3: Arrive at AGI

Subtract total adjustments from total income. The result on Line 11 of Form 1040 is your AGI.

Step 4: From AGI to Taxable Income

Subtract your standard or itemized deduction from AGI to get taxable income:

Taxable income = AGI minus deduction. This is the amount taxed at the 2026 rates shown in our tax bracket guide.

Real-World Examples

Example 1: Reducing AGI with Pre-Tax Contributions

James earns $85,000 in wages and wants to lower his AGI to qualify for a larger Saver's Credit. Here is how pre-tax contributions affect his AGI:

By maxing out his 401(k) and HSA, James reduces his AGI by $28,900. This could move him from partial to full Saver's Credit eligibility, reduce his taxable income for bracket purposes, and potentially qualify him for other AGI-based benefits.

Example 2: Self-Employed Taxpayer

Maria is a freelance graphic designer who earned $95,000 in net business income (after business expenses). She pays $7,200 in self-employment tax and $6,800 in health insurance premiums.

Maria's AGI drops from $95,000 to $63,535 through legitimate above-the-line adjustments. This is one of the biggest tax advantages of self-employment: the ability to fund retirement through a SEP IRA and deduct health insurance premiums directly against income.

Example 3: AGI and Roth IRA Eligibility

For 2026, Roth IRA contribution limits phase out based on modified AGI:

A married couple with combined wages of $215,000 and no pre-tax retirement contributions would have an AGI of $215,000, putting them in the phase-out range with a reduced Roth IRA contribution limit. If one spouse contributes $7,000 to a traditional 401(k), their AGI drops to $208,000, restoring full Roth IRA eligibility for both spouses.

Why AGI Matters Beyond Taxes

AGI appears in financial contexts outside the tax return itself:

• Health Insurance Marketplace subsidies: Premium tax credits under the Affordable Care Act are based on AGI relative to the federal poverty level
• Student loan repayment: Income-driven repayment plans for federal student loans use a variation of AGI to calculate monthly payments
• College financial aid: The FAFSA uses information related to AGI to determine Expected Family Contribution
• Medicaid eligibility: Many Medicaid programs use modified AGI to determine qualification
• Mortgage applications: Lenders may look at AGI when calculating debt-to-income ratios for self-employed borrowers

Modified AGI (MAGI)

Many tax rules use Modified Adjusted Gross Income (MAGI) instead of AGI. MAGI starts with AGI and adds back certain adjustments. The add-backs vary depending on the specific tax benefit:

• Roth IRA eligibility: Add back traditional IRA deductions, student loan interest, HSA contributions, and several other adjustments
• Premium tax credit: Add back foreign income, tax-exempt interest, and certain excluded income
• IRA deduction (if covered by employer plan): Add back traditional IRA deductions and certain other items

The result is that your MAGI is always equal to or higher than your AGI. If your AGI is near a phase-out threshold, check whether the specific rule uses AGI or MAGI.

Key Points to Remember

• AGI is your total income minus above-the-line adjustments, found on Line 11 of Form 1040
• Pre-tax retirement contributions (401(k), HSA, SEP IRA) are the most powerful AGI-reduction tools available to most workers
• AGI determines eligibility for Roth IRA contributions, traditional IRA deductibility, the Saver's Credit, and many other tax benefits
• Above-the-line adjustments benefit you regardless of whether you itemize or take the standard deduction
• Self-employed taxpayers have more opportunities to reduce AGI through health insurance deductions, SE tax deductions, and retirement plan contributions
• MAGI is always equal to or higher than AGI because it adds back certain adjustments
• The 2026 standard deduction ($16,100 single, $32,200 MFJ) is subtracted from AGI to arrive at taxable income

Common Mistakes to Avoid

• Confusing AGI with taxable income: AGI is before the standard or itemized deduction. Taxable income is AGI minus that deduction. Many people quote their AGI when asked for their taxable income, or vice versa.
• Missing above-the-line adjustments: If you have student loan interest, HSA contributions, or educator expenses, make sure to claim them as adjustments. They reduce AGI even if you take the standard deduction.
• Ignoring the backdoor Roth strategy: If your AGI is too high for direct Roth IRA contributions, you can use the backdoor Roth method (contribute to a traditional IRA, then convert to Roth). Read our backdoor Roth IRA guide for details.
• Forgetting that HSA contributions reduce AGI: HSA contributions made through payroll are already excluded from W-2 Box 1. But if you made contributions directly to an HSA outside of payroll, you can deduct them as an above-the-line adjustment on Schedule 1.
• Not timing retirement contributions strategically: If you are near a phase-out threshold, increasing pre-tax 401(k) contributions late in the year can push your AGI below the cutoff for Roth IRA eligibility or the Saver's Credit.

Related Concepts

Your AGI flows directly from your Form 1040 and determines how much tax you ultimately pay. It feeds into your tax bracket placement after the standard deduction or itemized deductions are subtracted. Retirement accounts like a 401(k), IRA, and HSA are the primary tools for reducing AGI. If you are self-employed, a SEP IRA offers large above-the-line deductions. To estimate how different contribution levels affect your tax bill, use our tax bracket calculator or the take-home pay calculator. For more on Roth eligibility and conversions, read our Roth IRA tax savings guide and our backdoor Roth IRA walkthrough.

Frequently Asked Questions

Q: What is the difference between AGI and gross income? A: Gross income is every dollar you earned from all sources before any deductions. AGI is gross income minus above-the-line adjustments. For example, if you earned $80,000 in wages and contributed $10,000 to a 401(k) and $4,400 to an HSA, your gross income is $80,000 but your AGI is $65,600. The 401(k) and HSA contributions are above-the-line adjustments that reduce AGI.

Q: Where do I find my AGI on my tax return? A: Your AGI is on Line 11 of Form 1040 for the 2026 tax year. If you used tax software last year, the program typically displays your prior-year AGI, which you need for electronic filing verification. You can also find it by requesting a tax return transcript from the IRS.

Q: Can I reduce my AGI after the tax year ends? A: Some adjustments can be made after December 31 but before the tax filing deadline. Traditional IRA and HSA contributions for the 2026 tax year can be made up until April 15, 2027. SEP IRA and solo 401(k) contributions can sometimes be made even later if you file an extension. Pre-tax 401(k) contributions, however, must be made through payroll during the calendar year.

Q: Does AGI include capital gains? A: Yes. Both short-term and long-term capital gains are included in total income and therefore in AGI. However, long-term capital gains and qualified dividends are taxed at preferential rates (0%, 15%, or 20%) rather than ordinary income rates, even though they are part of AGI. The preferential rates are applied separately on the tax form after AGI is calculated.

Q: Why does my MAGI differ from my AGI? A: MAGI adds back certain above-the-line adjustments to your AGI. The specific add-backs depend on which tax benefit is being tested. For Roth IRA eligibility, you add back deductions like traditional IRA contributions, student loan interest, and HSA contributions. This means your MAGI for Roth purposes is higher than your AGI, which can affect whether you qualify for full or partial contributions.