Adjusted Gross Income (AGI) on Form 1040 — Line 11

Adjusted gross income, or AGI, is your total income minus a specific set of adjustments, and it lands on line 11 of Form 1040. You start with gross income, which is wages, business income, interest, dividends, capital gains, retirement distributions, and the rest, then subtract the above-the-line adjustments that flow from Schedule 1, such as the deductible half of self-employment tax, deductible retirement contributions, health savings account contributions, the educator expense deduction, and student loan interest. The result is your AGI. It matters because it is the control number for the rest of the return. Many credits and deductions phase out based on AGI, not on your gross pay. Here is how the figure is built on the form. Total income is line 9. Your adjustments to income, carried from line 26 of Schedule 1, land on line 10. Line 11 is line 9 minus line 10, and that is your AGI. From there, line 12 is your deduction, either the standard deduction or your Schedule A itemized deductions, and subtracting that gets you to taxable income on line 15. So AGI sits in the middle of the return, after income and adjustments but before deductions and tax. It is also the figure the IRS uses to verify your identity when you e-file, because prior-year AGI works as a signature check. Worked example with real dollars. Suppose you earned 95,000 dollars in wages and had 5,000 dollars of freelance income, for 100,000 dollars of total income on line 9. You contributed 4,150 dollars to an HSA, deducted 600 dollars as the employer-equivalent half of your self-employment tax, and paid 1,250 dollars of student loan interest. Those adjustments total 6,000 dollars on line 10. Your AGI on line 11 is 94,000 dollars. That 94,000 dollar figure, not the 100,000 dollar gross, is what every downstream phaseout measures against. The common mistake is confusing AGI with taxable income. AGI comes before the standard or itemized deduction. Taxable income comes after. Mixing them up throws off any phaseout estimate. An edge case. Some adjustments have their own caps and income limits, for example the student loan interest deduction itself phases out at higher income, so a high earner may not get to subtract it at all. The HSA deduction has its own annual contribution cap, and the self-employment tax adjustment is exactly half of the self-employment tax computed on Schedule SE, not a free-standing number you choose. Each adjustment has its own rule, which is why they are listed separately on Schedule 1 rather than lumped together. Confirm the current definition at the IRS page on adjusted gross income at https://www.irs.gov/filing/adjusted-gross-income, the e-file definition at https://www.irs.gov/e-file-providers/definition-of-adjusted-gross-income, and the Schedule 1 detail at https://www.irs.gov/forms-pubs/about-schedule-1-form-1040. From AGI you subtract either the standard deduction or your itemized deductions to reach taxable income, so getting AGI right is the foundation of the whole return. We handle that line by line when we prepare https://reedcorp.tax/services/individual-tax-returns-1040/ and plan around it through https://reedcorp.tax/services/tax-strategy-consulting/. If you want the related concept, our AGI versus MAGI guide breaks down the add-backs, and you can start a conversation at https://reedcorp.tax/new-client-inquiry/.

On the current Form 1040, adjusted gross income is line 11. The form walks you there in two steps. Total income is line 9, your adjustments to income from Schedule 1 land on line 10, and line 11 is line 9 minus line 10, which is your AGI. From there, line 12 is your deduction, standard or itemized, and the subtraction continues toward taxable income on line 15. The line number has moved over the years as the IRS redesigned the 1040, which is why older guides may point somewhere else, but for recent tax years AGI sits on line 11 and it stays there on the 2024 and 2025 forms. Here is the history that causes the confusion. On the 2018 return, the first year of the redesigned postcard-style form, AGI was on line 7. For 2019 it shifted to line 8b, tucked under line 8a. Since the 2020 tax year it has been line 11, and that is still the case today. So a return you filed a few years back may legitimately show your AGI on a different line than this year’s does. When you pull an old copy to find a number, check which line held AGI for that specific year before you copy the figure across. Worked example. You are e-filing your 2025 return and the software asks for your prior-year AGI to verify your identity. You open your 2024 Form 1040, go to line 11, and read 78,420 dollars. That single number is what the software wants. If you had instead pulled your 2019 return, the AGI would have been on line 8b, and on your 2018 return it would have been on line 7. Same concept, different line, depending on the year of the form in front of you. This is also why a tax pro will always ask which tax year a document belongs to before reading a number off it, because the same physical spot on the page meant different things across these redesigns. The common mistake is grabbing the wrong year’s line or hunting for an 11a or 11b that does not exist on the current form. AGI on line 11 is a single figure with no a or b split. An edge case. If you filed late or amended, use the AGI from the originally filed return for e-file verification unless the IRS instructs otherwise, because the verification system keys off the original figure. If you did not file a return at all in the prior year, the verification will generally expect a zero rather than a number, which is a frequent source of rejections for first-time or returning filers. You can confirm the line and the definition at the IRS adjusted gross income page at https://www.irs.gov/filing/adjusted-gross-income and the general Form 1040 instructions at https://www.irs.gov/instructions/i1040gi. If you are reconstructing the calculation, the line 10 adjustments are where total income becomes AGI, and Schedule 1 is where those adjustments live. We prepare returns with that flow built in through https://reedcorp.tax/services/individual-tax-returns-1040/ and keep prior-year figures organized through https://reedcorp.tax/services/tax-compliance/ so e-file verification is never a guessing game. Reach us at https://reedcorp.tax/new-client-inquiry/, and see the IRS Schedule 1 form at https://www.irs.gov/forms-pubs/about-schedule-1-form-1040 for the underlying detail.

There is no MAGI line on Form 1040. Modified adjusted gross income is a calculation you build on top of AGI, not a number the form prints. You take your AGI from line 11 and add back certain items, and which items depends on the rule you are testing. For Roth IRA eligibility you add back things like the foreign earned income exclusion and the student loan interest deduction. For the premium tax credit the add-backs are different, including tax-exempt interest and excluded foreign income. That is the trap. MAGI is not one fixed number, it is AGI plus whatever a specific provision tells you to add back. Because most people have few or none of those add-backs, their MAGI often equals their AGI, which is why the two get confused. But the gap can be large for the right taxpayer. An expat using the foreign earned income exclusion, a landlord with tax-exempt municipal bond interest, or a graduate still deducting student loan interest can all see a MAGI that sits well above the AGI printed on line 11. Since the threshold tests for credits and contribution limits run off MAGI, that gap can be the difference between qualifying and phasing out. Worked example. Your AGI on line 11 is 138,000 dollars. You are single and want to know whether you can contribute to a Roth IRA. The Roth phaseout uses MAGI. You have 3,000 dollars of tax-exempt interest and took a 2,000 dollar student loan interest deduction that must be added back for this test. Your Roth MAGI is therefore about 143,000 dollars, not 138,000 dollars. That 5,000 dollar difference can push you further into the phaseout range and shrink the amount you are allowed to contribute, so using AGI instead of MAGI would have given you the wrong answer. If your MAGI had instead come out above the top of the single-filer range, you would be barred from a direct Roth contribution entirely, even though your line 11 AGI looked comfortably under the limit. The few thousand dollars of add-backs decide the outcome. The common mistake is assuming MAGI and AGI are interchangeable. They often match, but when they do not, the difference decides eligibility. An edge case. Each provision defines its own MAGI, so the MAGI for the premium tax credit is computed differently from the MAGI for Roth contributions or for the net investment income tax. You cannot compute one MAGI and reuse it everywhere, and reusing the wrong one is a quiet but common error that surfaces only when a credit gets denied on review. Each test deserves its own short calculation. Check the IRS definition of AGI at https://www.irs.gov/filing/adjusted-gross-income, the Roth IRA contribution limits at https://www.irs.gov/retirement-plans/amount-of-roth-ira-contributions-that-you-can-make-for-2025, and the IRA deduction limits at https://www.irs.gov/retirement-plans/ira-deduction-limits. Getting MAGI right for the specific provision in front of you is where a lot of quiet planning happens. We compute the correct MAGI for each test when we prepare https://reedcorp.tax/services/individual-tax-returns-1040/ and use it to position contributions and timing through https://reedcorp.tax/services/tax-strategy-consulting/. Our AGI versus MAGI guide lists the common add-backs by provision, and you can bring your specific situation to us at https://reedcorp.tax/new-client-inquiry/.

Your prior-year AGI is on line 11 of last year’s Form 1040, the same line as the current year. You need it most often to verify your identity when you e-file, because the IRS uses prior-year AGI as a signature check in place of a wet signature. Pull last year’s return, go to line 11, and read the figure. If you cannot find a paper or PDF copy, you can retrieve it for free from the IRS rather than guessing, because a wrong number will cause the e-file to reject. Here is how to retrieve it when the copy is missing. You can pull a free tax return transcript or a wage and income transcript from your IRS Online Account, and the AGI is listed on the return transcript. The transcript shows the figure exactly as the IRS has it on file, which is the same figure the e-file verification compares against. Order it online through your account, or request it by mail if you do not have online access. Keep in mind the transcript reflects the originally processed return, so an amended figure may not appear there. The return transcript also masks some personal information for security, but the AGI figure is shown in full, which is all you need for the e-file check. If you used a paid preparer last year, your copy of the return is the fastest source, since it shows line 11 directly without any retrieval step. Worked example. You are e-filing your 2025 return in March 2026 and the software rejects it with an AGI mismatch. You log into your IRS Online Account, open the 2024 return transcript, and find AGI of 64,300 dollars. You had typed 64,030 dollars, a simple transposition. Correcting the entry to 64,300 dollars clears the rejection and the return goes through. The fix is almost always a wrong digit or the wrong year, not a real problem with the return itself. Once the figure matches what the IRS has on file, the rejection clears immediately, and you can resubmit the same return without any other change. A mismatch does not mean the return is wrong, only that the signature check did not line up. The common mistake is entering the current year’s expected AGI, or pulling the figure from the wrong year’s form, or using a rounded number. The verification wants the exact line 11 figure from the immediately prior year. An edge case. If you filed late, did not file at all last year, or amended, the verification may expect a zero or the originally filed figure, so check the IRS guidance before assuming. Get a transcript at https://www.irs.gov/individuals/get-transcript, set up access at https://www.irs.gov/your-account, and confirm the AGI definition at https://www.irs.gov/filing/adjusted-gross-income. Keeping a copy of each year’s return is the simplest fix, since AGI is the one number you reach for every filing season. We retain client returns and supporting figures through https://reedcorp.tax/services/tax-compliance/ and prepare the current return so the prior-year AGI is already in hand through https://reedcorp.tax/services/individual-tax-returns-1040/. If a rejection has you stuck, bring it to us at https://reedcorp.tax/new-client-inquiry/ and we will track down the right figure.

AGI is the gatekeeper for a large share of the tax code. Eligibility for credits like the child tax credit, education credits, and the premium tax credit phases out as AGI or the related MAGI rises. Deduction thresholds key off it too. Medical expenses on Schedule A only count to the extent they exceed 7.5 percent of AGI, and several other limits move with it. Because so much keys off this one line, lowering AGI is where a lot of real tax planning happens, through retirement contributions, HSA contributions, and other above-the-line adjustments that reduce AGI directly rather than as itemized deductions. Here is why the direct reduction matters more than people expect. An above-the-line adjustment lowers AGI itself, which not only reduces taxable income but also improves every test that measures against AGI. An itemized deduction, by contrast, reduces taxable income but does nothing to your AGI, so it does not help you clear a phaseout. That asymmetry is the reason a deductible IRA or HSA contribution can be worth far more than its face value, because it can rescue a credit or a deduction that would otherwise vanish. Worked example. You are married filing jointly with two children and an AGI of 408,000 dollars. The child tax credit begins phasing out for joint filers above 400,000 dollars of MAGI, reduced by 50 dollars for each 1,000 dollars over the threshold. At 408,000 dollars you are 8,000 dollars over, so you lose 400 dollars of credit. Now suppose you each make a deductible retirement contribution that lowers AGI by 8,000 dollars to 400,000 dollars. You are back at the threshold and recover the full 400 dollars of credit, on top of the tax saved by the contribution itself. The adjustment paid for itself twice, once through the ordinary tax savings on the contribution and again through the recovered credit. That stacked benefit is invisible if you only look at the contribution’s headline deduction. It is the reason year-end AGI management is worth the effort for households sitting just above a phaseout line. The common mistake is focusing only on the deduction’s face value and ignoring its effect on AGI-driven phaseouts. The second effect is often the bigger one. An edge case. Some thresholds use MAGI rather than raw AGI, so an add-back can pull you back over a line you thought you had cleared, which is why the two figures have to be checked together. See the medical expense rules in the Schedule A instructions at https://www.irs.gov/instructions/i1040sca, the child tax credit details at https://www.irs.gov/credits-deductions/individuals/child-tax-credit, and the AGI definition at https://www.irs.gov/filing/adjusted-gross-income. Because so much keys off this one line, a CPA looks at AGI first. It determines which credits survive, which deductions are usable, and how much room is left before the next phaseout. New York City taxpayers should note the city and state piggyback on federal figures, so AGI planning ripples into state and city tax as well. We run that analysis through https://reedcorp.tax/services/tax-strategy-consulting/ and apply it on the return through https://reedcorp.tax/services/individual-tax-returns-1040/. Start at https://reedcorp.tax/new-client-inquiry/.

Neither. On the 2025 Form 1040, adjusted gross income is reported on a single Line 11. There is no line 11a or line 11b. You arrive at it by taking your total income on line 9 and subtracting the adjustments to income on line 10, and the result on line 11 is your AGI. The a and b phrasing usually comes from one of two places. Either you are remembering an earlier form, or you are thinking of the nearby lines that genuinely do split into an a part and a b part. Both are easy mix-ups, and both lead people to look for a line that is not on the form. Take the history first. AGI was on line 8b for the 2019 form and on line 7 for the 2018 form before it settled on line 11 for 2020 and every year since. So if your memory says 8b, you are remembering 2019, not a current 11b. Now the nearby split lines. On today’s Form 1040, line 4 splits into 4a and 4b for IRA distributions, line 5 into 5a and 5b for pensions and annuities, and line 6 into 6a and 6b for Social Security benefits. In each pair the a amount is the total you received and the b amount is the taxable portion that actually carries into income. Worked example of why the a and b distinction matters elsewhere. Suppose you received 30,000 dollars of Social Security benefits. Line 6a shows the full 30,000 dollars received. After the taxability worksheet, perhaps only 25,500 dollars is taxable, so line 6b shows 25,500 dollars, and only that 25,500 dollars flows into your total income on line 9 and ultimately into AGI on line 11. AGI itself never splits this way. It is one figure, total income minus the line 10 adjustments, reported once. The same logic applies to line 4 and line 5. If you took a 20,000 dollar IRA distribution that was fully taxable, line 4a shows 20,000 dollars and line 4b also shows 20,000 dollars, but if part was a nontaxable rollover, the b line would be smaller than the a line. Only the b figure feeds your income and your AGI. The common mistake is hunting for an 11a or 11b when e-file software asks for prior-year AGI. Give it the single line 11 figure from last year’s return, not an a or b sub-line and not the wrong year’s line. An edge case. If you are amending or working from an older copy, confirm which line held AGI for that specific year before copying the figure, since 2018 used line 7 and 2019 used line 8b. Confirm the current line at the IRS adjusted gross income page at https://www.irs.gov/filing/adjusted-gross-income, the Form 1040 instructions at https://www.irs.gov/instructions/i1040gi, and Publication 17 at https://www.irs.gov/publications/p17. When the prior-year figure and the current calculation both have to be right, that is exactly the kind of detail we keep straight. We prepare the current return through https://reedcorp.tax/services/individual-tax-returns-1040/ and retain prior-year figures through https://reedcorp.tax/services/tax-compliance/ so the line 11 number is always at hand. If an 11a or 11b question has you second-guessing a filing, bring it to us at https://reedcorp.tax/new-client-inquiry/.