2026 AGI Calculator (Adjusted Gross Income)

Background.

An AGI calculator answers a question that sits underneath almost every other tax number you'll ever look up: what is your Adjusted Gross Income for 2026, and which specific above-the-line deductions got you there? AGI is not your salary and it is not your taxable income — it is the number in between, reported on Form 1040 line 11, and it is the figure that determines eligibility for a long list of other tax benefits: whether you can deduct traditional IRA contributions, whether you qualify for education credits, whether your Social Security benefits are taxable, and where several phase-outs begin. Getting AGI right matters even if you never look at it again after filing, because so much else is built on top of it.

This calculator starts from your total gross income — wages, self-employment income, interest, dividends, and other taxable earnings — and walks through six specific above-the-line adjustments one at a time: the educator expense deduction, the HSA contribution deduction, the student loan interest deduction, the traditional IRA deduction, the self-employment tax deduction, and a catch-all field for any other Schedule 1 adjustment you're claiming. Each of the first four fields is capped at its verified 2026 IRS limit, fetched directly from IRS.gov this session: $350 for educator expenses (up from $300 in 2025, per Revenue Procedure 2025-32), $8,750 for family HSA coverage or $4,400 for self-only (Revenue Procedure 2025-19), $2,500 for student loan interest (a fixed statutory cap under IRC §221(b)(1) that does not move with inflation), and $8,600 for traditional IRA contributions including the age-50+ catch-up (matching the same 2026 IRA figures verified for Quanta's Roth IRA calculator).

The distinction between AGI and taxable income trips up a surprising number of people, including some who have filed their own return for years. Taxable income is AGI minus the standard deduction (or itemized deductions) — a further subtraction that happens AFTER AGI is calculated, not before. This calculator stops at AGI deliberately, because AGI is the number that gates eligibility for other benefits regardless of whether you take the standard deduction or itemize afterward. If you want the full walk from gross income all the way to your federal tax liability, use Quanta's federal income tax calculator or tax bracket calculator next — both pick up exactly where this one leaves off.

This calculator asks you to enter each above-the-line deduction as a dollar amount you already know or have already confirmed you qualify for, rather than trying to determine your eligibility for you. That is a deliberate scope decision: some of these deductions have their own phase-out rules that depend on factors this calculator does not collect (for example, whether a traditional IRA deduction is limited because you're covered by a workplace retirement plan). Rather than guess at eligibility, this tool enforces only the flat statutory dollar ceiling for each line and lets you supply the already-determined amount, so every number it produces is traceable straight back to a verified IRS figure.

What is agi calculator?

Adjusted Gross Income (AGI) is total gross income minus a specific set of above-the-line deductions defined in Internal Revenue Code §62 — often called 'adjustments to income.' It sits between gross income (everything you earned) and taxable income (what's actually run through the tax brackets), and it is reported on Form 1040, line 11. AGI matters beyond your own tax bill: it is the eligibility gate for traditional IRA deductibility phase-outs, education credits, several other credits and deductions, and the threshold used (with further modification) for Roth IRA contribution limits, the Net Investment Income Tax, and Affordable Care Act premium tax credit calculations.

Above-the-line deductions are called that because they are subtracted before you decide whether to take the standard deduction or itemize — everyone gets to claim them regardless of that later choice, unlike itemized deductions such as mortgage interest or charitable giving, which only help if their total exceeds the standard deduction. The most common above-the-line deductions for individual filers are the educator expense deduction, HSA and retirement account contributions, student loan interest, and half of any self-employment tax paid.

How to use this calculator.

1. 01Enter your total gross income for 2026 — wages, self-employment income, interest, dividends, and other taxable earnings.
2. 02Enter your educator expense deduction, if you're an eligible K-12 educator (2026 cap: $350; up to $700 combined if both spouses qualify on a joint return).
3. 03Enter your HSA contribution deduction (2026 cap: $4,400 self-only, $8,750 family, plus $1,000 if you're 55+).
4. 04Enter your student loan interest deduction (fixed statutory cap: $2,500).
5. 05Enter your traditional IRA deduction (2026 cap: $7,500, or $8,600 with the age-50+ catch-up).
6. 06If self-employed, enter your self-employment tax deduction (50% of your computed SE tax — see Quanta's self-employment tax calculator).
7. 07Enter any other above-the-line adjustment in the catch-all field, then read your AGI.

The formula.

Reviewed on 2026-07-27 against verified 2026 IRS figures. The calculator sums six above-the-line deduction fields — educator expenses, HSA contribution deduction, student loan interest deduction, traditional IRA deduction, self-employment tax deduction, and other adjustments — into a single total, then subtracts that total from gross income to produce AGI. Four of the six fields carry a hard statutory ceiling this calculator enforces directly: $350 for educator expenses (Revenue Procedure 2025-32 §4.12, verified via the IRS Internal Revenue Bulletin 2025-45 on 2026-07-27), $8,750 for HSA family coverage or $4,400 self-only (Revenue Procedure 2025-19, verified via IRS Internal Revenue Bulletin 2025-21), $2,500 for student loan interest (26 U.S.C. §221(b)(1), a fixed dollar figure the statute never indexes for inflation even though the phase-out range around it does move every year), and $8,600 for traditional IRA contributions including the age-50+ catch-up (the same 2026 IRA figures independently verified for Quanta's Roth IRA calculator).

The self-employment tax deduction and 'other adjustments' fields carry no single fixed cap in the Code — the SE tax deduction is mathematically 50% of whatever self-employment tax you actually owe, which scales with income, and 'other adjustments' is a deliberately generic catch-all for less common Schedule 1 items such as alimony paid under a pre-2019 divorce decree or the early-withdrawal savings penalty. Both fields are validated only for non-negativity.

This calculator does not evaluate WHETHER you qualify for a given deduction (for example, whether your traditional IRA deduction is reduced because you're covered by a workplace retirement plan) — it assumes you have already confirmed the dollar amount you're entering is the correct, already-phased-out figure, and its job is only to total those confirmed amounts and subtract them from gross income.

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.