2026 AGI Calculator (Adjusted Gross Income)

Background.

Adjusted gross income is the figure the IRS uses to decide what else you are allowed. It is gross income after a short list of subtractions called adjustments to income, and it comes before the standard or itemized deduction. Your bracket is applied later, to taxable income, but many eligibility tests look at AGI or a modified version of it: whether a traditional IRA contribution is deductible, whether you can contribute to a Roth IRA, whether you qualify for education credits or the student loan interest deduction, and how large the 7.5% floor on itemized medical expenses is.

Because those tests switch on and off at particular income levels, a few hundred dollars of adjustments can matter well beyond the tax they save directly. Each dollar of adjustment lowers AGI by exactly a dollar, and every benefit measured against AGI sees the lower number.

The arithmetic here is a sum and a subtraction, set up for the 2026 tax year. Four common adjustments have their own fields, each limited to its 2026 ceiling: $350 per eligible educator ($700 on a joint return where both spouses qualify) for educator expenses, $8,750 for HSA contributions with family coverage (up to $10,750 with the age-55 catch-ups), the fixed $2,500 for student loan interest and $8,600 for a traditional IRA contribution with the age-50 catch-up. A fifth field takes the deductible half of self-employment tax, and a sixth gathers everything else on Schedule 1, from SEP and SIMPLE contributions to self-employed health insurance.

What the arithmetic does not do is decide whether you qualify. Several of these deductions phase out as income rises, and the IRA deduction also depends on whether you or your spouse are covered by a retirement plan at work. Those tests need facts no form field here collects, so each amount should be the one you have already confirmed you can claim. Nothing here is tax advice; it is the subtraction your return will perform, with your numbers.

What is agi calculator?

Adjusted gross income (AGI) is gross income minus the deductions the tax code allows before the standard-or-itemized choice. These are often called above-the-line deductions, and the statutory list sits in Internal Revenue Code §62. Everyone who qualifies for one can take it, whether or not they itemize. Gross income here means taxable income from every source: wages as shown in box 1 of a W-2, net self-employment profit, taxable interest, dividends, net capital gains, the taxable part of retirement distributions and Social Security, and so on. Many phase-outs use modified AGI, which adds certain items back; AGI is the common starting point for all of them.

How to use this calculator.

1. 01Enter total gross income. Use box 1 of your W-2 rather than your salary — box 1 already leaves out traditional 401(k) deferrals and other pre-tax payroll deductions — and use net profit, not gross receipts, for self-employment income.
2. 02Fill in the four capped fields for adjustments you qualify for: educator expenses up to $350 for each eligible educator ($700 for two on a joint return), HSA contributions up to $8,750 with family coverage ($4,400 self-only, plus $1,000 for each account holder aged 55 or older), student loan interest up to $2,500 and traditional IRA deductions up to $8,600. Leave a field at zero if it does not apply to you.
3. 03For self-employment, enter half of your self-employment tax, not the tax itself; the self-employment tax calculator works out the full figure.
4. 04Put any other Schedule 1 adjustment in the last field: SEP, SIMPLE or solo 401(k) contributions, the self-employed health insurance deduction, an early-withdrawal penalty on savings, alimony under a pre-2019 decree, or active-duty military moving expenses.
5. 05Read AGI, then carry it into the federal income tax calculator, which subtracts the standard or itemized deduction to reach taxable income.

The formula.

AGI = gross income − (educator expenses + HSA deduction + student loan interest + traditional IRA deduction + deductible half of SE tax + other adjustments). The sum in brackets is reported as total above-the-line deductions, and a third figure divides that sum by gross income and multiplies by 100 to show what share of income the adjustments removed; when gross income is zero that share is shown as 0%.

The four named fields stop at their 2026 dollar ceilings. The $350 educator limit comes from Revenue Procedure 2025-32 and applies to each eligible educator, so the field stops at $700, the most a joint return with two eligible educators can claim; it does not know how many educators you have. The HSA limits come from Revenue Procedure 2025-19: $4,400 for self-only coverage and $8,750 for family coverage, each raised by $1,000 for an account holder aged 55 or older. The field stops at $10,750, the family limit with the catch-up for both spouses, and does not know which coverage you have or how old you are. The $2,500 student loan cap is written into §221(b)(1) and is not indexed for inflation, although the income range over which it phases out is adjusted every year. The $8,600 IRA ceiling is the $7,500 base limit plus the $1,100 catch-up for people 50 and over. The self-employment and other-adjustment fields have no ceiling, since their legal limits depend on income and circumstances.

No phase-out is modelled. If your income is in the range where the IRA or student loan deduction shrinks, enter the reduced amount from the worksheet in the Form 1040 instructions. Adjustments larger than income produce a negative AGI rather than stopping at zero.

A worked example.

Frequently asked questions.

References& sources.

1. [1]Internal Revenue Service (2025). Revenue Procedure 2025-32 §4.12 (educator expense deduction), via IRS Internal Revenue Bulletin 2025-45.
2. [2]Internal Revenue Service (2025). Revenue Procedure 2025-19 (HSA inflation-adjusted amounts for 2026), via IRS Internal Revenue Bulletin 2025-21.
3. [3]26 U.S.C. §221 — Interest on Education Loans (student loan interest deduction, $2,500 statutory cap).
4. [4]Internal Revenue Service (2025). "401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500." IRS Newsroom.
5. [5]Internal Revenue Service. About Schedule 1 (Form 1040), Additional Income and Adjustments to Income.