Adjusted gross income is a before-tax number. AGI sits in the middle of the tax calculation: it is your total income minus a specific set of adjustments the tax code allows, and it is figured before federal income tax, state income tax, Social Security, and Medicare are applied. You will find it on Line 11 of Form 1040.1Internal Revenue Service. Definition of Adjusted Gross Income The after-tax figure people usually have in mind, take-home pay, is a smaller, separate number.
Which Taxes Have Not Yet Been Taken Out
The word “adjusted” is what causes the confusion. It sounds like a final figure, but nothing on the tax side of the ledger has been removed at the AGI stage. Still waiting to be applied:
- Federal income tax
- State income tax
- Social Security tax, at 6.2% on wages up to $184,500 in 20262Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet
- Medicare tax, at 1.45% on all wages, plus an extra 0.9% on wages above $200,0003Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates
None of those payroll taxes reduce AGI. They are separate line items on your paycheck; they shrink what you take home but do not appear in the AGI calculation. So someone with an AGI of $65,000 might see roughly $48,000 land in the bank after federal tax, state tax, Social Security, Medicare, and health insurance premiums come out. The gap between those two numbers is the reason AGI is not your take-home pay.
What Has Already Been Subtracted to Reach AGI
AGI is not the same as gross income either. To get from one to the other, you subtract a defined list of deductions the tax code allows, often called above-the-line adjustments because they sit above the AGI line on Form 1040.4Office of the Law Revision Counsel. 26 U.S.C. 62 – Adjusted Gross Income Defined Anyone who qualifies can claim them, whether they later take the standard deduction or itemize.
The common ones include:
- Up to $300 in unreimbursed classroom supplies for K-12 educators who work at least 900 hours in a school year.5Internal Revenue Service. Topic No. 458, Educator Expense Deduction
- Up to $2,500 in student loan interest, with phase-outs at higher incomes.6Internal Revenue Service. Topic No. 456, Student Loan Interest Deduction
- Traditional IRA contributions, subject to phase-outs if you or your spouse have a workplace retirement plan.4Office of the Law Revision Counsel. 26 U.S.C. 62 – Adjusted Gross Income Defined
- HSA contributions, up to $4,400 for self-only and $8,750 for family coverage in 2026.7IRS. Expanded Availability of Health Savings Accounts Under the One, Big, Beautiful Bill Act (OBBBA) Notice 2026-5
- Half of self-employment tax for the self-employed.8Internal Revenue Service. Topic No. 554, Self-Employment Tax
- Self-employed health, dental, and long-term care insurance premiums.
- Alimony paid under divorce or separation agreements finalized on or before December 31, 2018. Agreements executed after that date do not qualify.9Internal Revenue Service. Divorce or Separation May Have an Effect on Taxes
- Unreimbursed moving expenses for active-duty military members changing station.10Internal Revenue Service. Instructions for Form 3903 (2025)
Gross income itself is broad. It is everything you earned or received during the year unless the code specifically excludes it: wages, tips, interest, dividends, capital gains, business income, rental payments, royalties, and pension distributions.11Office of the Law Revision Counsel. 26 U.S.C. 61 – Gross Income Defined Subtract the adjustments above, and you land on AGI. Taxes have not entered the picture yet.
Where Taxes Actually Enter: From AGI to Taxable Income
After AGI, the next subtraction is either the standard deduction or your total itemized deductions. What remains is your taxable income, and that is the figure tax rates apply to.12Office of the Law Revision Counsel. 26 U.S.C. 63 – Taxable Income Defined
The 2026 standard deduction amounts are:13Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
- Single filers: $16,100
- Married filing jointly: $32,200
- Head of household: $24,150
Take that $65,000 AGI example. A single filer using the standard deduction has taxable income of $48,900. Federal rates then apply in layers: 10% on the first $12,400, 12% on the next chunk, 22% on the portion above $50,400, and so on up to the top rate of 37%, which only reaches single-filer income above $640,600.13Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Only the income inside a higher bracket is taxed at that higher rate.
AGI itself also drives eligibility for many credits. The Child Tax Credit, for example, begins to phase out when AGI exceeds $200,000 for single filers or $400,000 for joint filers.14Internal Revenue Service. Child Tax Credit Reducing AGI through above-the-line adjustments can keep those credits intact.
A Related Number: Modified Adjusted Gross Income
Several tax rules use modified adjusted gross income, or MAGI, rather than AGI. MAGI starts with your AGI and adds back specific items. The exact add-backs depend on which benefit is being tested, so there is no single MAGI formula.15Internal Revenue Service. Modified Adjusted Gross Income
For Roth IRA eligibility, MAGI adds back items such as the traditional IRA deduction, the student loan interest deduction, and the foreign earned income exclusion.15Internal Revenue Service. Modified Adjusted Gross Income The 2026 Roth phase-out ranges are $153,000 to $168,000 for single filers and $242,000 to $252,000 for joint filers.16Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 For the Premium Tax Credit, the add-backs include tax-exempt interest and nontaxable Social Security benefits, items that never appear in AGI at all. MAGI is generally equal to or higher than AGI, and it too is a pre-tax figure.
Where to Find Your AGI
Your current-year AGI is on Line 11 of Form 1040.1Internal Revenue Service. Definition of Adjusted Gross Income If you need last year’s AGI to verify your identity when e-filing, you have a few options:17Internal Revenue Service. Validating Your Electronically Filed Tax Return
- Line 11 of your most recent Form 1040.
- Your IRS Online Account, under the Tax Records tab.
- A tax transcript ordered online or by calling 800-908-9946, which takes 5 to 10 days.
- Your prior-year preparer or filing software.
First-time filers over age 16 enter zero for their prior-year AGI when e-filing.17Internal Revenue Service. Validating Your Electronically Filed Tax Return