2025 AGI Calculator
Calculate Adjusted Gross Income (AGI) — the figure on Form 1040, line 11 — by adding total income from wages, interest, dividends, capital gains, and self-employment, then subtracting above-the-line adjustments. AGI is the starting point for taxable income, IRA eligibility, education credits, and most state income tax calculations.
Total income
Adjustments (above-the-line)
What is Adjusted Gross Income?
Adjusted Gross Income (AGI) is your total income for the tax year less a specific list of above-the-line adjustments. It is computed on the front of Form 1040 and reported on line 11. AGI is the most consequential single line on the federal tax return — it is the gating figure for retirement account eligibility, education credits, the Saver's Credit, the medical-expense deduction floor, the Premium Tax Credit (ACA), and the starting point for state income tax in most states. Understanding how to compute AGI — and how to lower it through above-the-line moves — is the most consequential single thing a household can do in tax planning.
The AGI Formula
The IRS formula on Form 1040 is straightforward:
AGI = Total income − Adjustments to income
Total income is reported on Form 1040, lines 1–9, and includes wages (W-2 Box 1), taxable interest, ordinary dividends, taxable IRA and pension distributions, taxable Social Security benefits, capital gains, and net business/self-employment income. Adjustments to income are reported on Schedule 1, Part II, and include HSA contributions, the deductible portion of self-employment tax, self-employed health insurance, SEP/SIMPLE retirement contributions, the traditional IRA deduction, student loan interest (capped at $2,500), and educator expenses ($300 max).
AGI vs. Gross Income vs. Taxable Income
These three figures are distinct and frequently confused. Gross income is all taxable income before any adjustments — every dollar of wages, interest, dividends, capital gains, and business profit. Adjusted Gross Income (AGI) is gross income minus above-the-line adjustments. Taxable income is AGI minus the standard deduction (or itemized deductions) and the qualified business income deduction. Taxable income is the figure that flows into the bracket math; AGI is the figure that drives credit eligibility. See our AGI glossary entry for the full definitional breakdown.
How AGI Drives Other Tax Provisions
Many tax provisions phase in or out based on AGI (or a modified version, MAGI):
- Roth IRA contribution limits phase out at $150K–$165K (single) and $236K–$246K (MFJ) for 2025.
- Traditional IRA deductibility phases out based on workplace retirement plan coverage and AGI.
- Child Tax Credit phases out starting at $200K (single) / $400K (MFJ) of AGI.
- American Opportunity Tax Credit phases out at $80K–$90K (single) / $160K–$180K (MFJ) of MAGI.
- Medical expense deduction only kicks in above 7.5% of AGI.
- Net Investment Income Tax (3.8%) applies above $200K (single) / $250K (MFJ) of MAGI.
- ACA premium tax credit uses household MAGI relative to the federal poverty line.
Strategies to Lower AGI
Because AGI gates so many provisions, lowering it is the single highest-leverage move in tax planning. The most effective above-the-line strategies:
- Maximize 401(k) / 403(b) / 457 contributions — these reduce W-2 Box 1 before AGI is even computed.
- Contribute to an HSA if you have a qualifying high-deductible health plan (up to $4,300 self-only / $8,550 family for 2025).
- Deduct traditional IRA contributions if eligible.
- Self-employed: maximize SEP-IRA or solo 401(k) contributions, deduct half of SE tax, and deduct self-employed health insurance premiums.
- Pay student loan interest (up to $2,500) and claim the deduction.
For a deeper walkthrough of reducing your tax bill, see the reduce-your-tax-bill guide.
Authoritative References
The official IRS source for AGI and its computation is Form 1040 and its instructions. Adjustments are documented in Schedule 1. For tax law context the Tax Foundation publishes annual summaries of bracket and AGI threshold changes.
Frequently Asked Questions
What is Adjusted Gross Income (AGI)?
Adjusted Gross Income is your total income for the tax year minus a defined list of "above-the-line" adjustments. It appears on Form 1040, line 11. AGI is the starting point for almost every other tax calculation — the standard deduction, itemized deductions, taxable income, and many credits all key off AGI or a modified version of it (MAGI).
How do I calculate AGI from my W-2?
Box 1 of your W-2 (wages, tips, other compensation) is the starting point for wage income, not your AGI. To get to AGI, you add Box 1 to other income — taxable interest, dividends, capital gains, IRA distributions, self-employment net profit, and similar items — then subtract above-the-line adjustments (HSA contributions, student loan interest, traditional IRA deduction, half of self-employment tax, etc.). AGI is the result. The calculator on this page implements that formula line by line.
What is the difference between gross income and AGI?
Gross income is everything taxable you received in the year — wages, business profit, investment income, retirement distributions, and so on. Adjusted Gross Income is gross income minus the specific above-the-line deductions Congress has authorized: HSA contributions, traditional IRA deductions, student loan interest (up to $2,500), educator expenses, half of self-employment tax, deductible SEP/SIMPLE contributions, and a handful of others. AGI is always less than or equal to gross income.
What is MAGI and how is it different from AGI?
Modified Adjusted Gross Income (MAGI) is AGI with certain deductions added back, and the exact add-backs vary by tax provision. For Roth IRA eligibility, MAGI adds back the traditional IRA deduction. For the Net Investment Income Tax, MAGI adds back foreign earned income exclusion. For ACA premium tax credits, MAGI adds back non-taxable Social Security, foreign income, and tax-exempt interest. Always check the definition for the specific provision you are evaluating — there is no single MAGI.
Why does AGI matter?
AGI determines eligibility and phase-outs for many tax benefits: traditional and Roth IRA contributions, the Saver's Credit, the Child Tax Credit, education credits (American Opportunity and Lifetime Learning), the medical-expense deduction floor (7.5% of AGI), and most state income tax calculations start from federal AGI. Lower AGI generally means lower federal tax and broader access to credits, so above-the-line adjustments (which reduce AGI) are more valuable than below-the-line itemized deductions for many filers.
How can I reduce my AGI?
Above-the-line strategies that directly reduce AGI include: contributing to a traditional 401(k) or 403(b) through your employer (the contribution comes out of Box 1 wages before AGI), contributing to a Health Savings Account (HSA), contributing to a traditional IRA if you qualify for the deduction, paying student loan interest, making deductible SEP-IRA or solo 401(k) contributions if self-employed, and deducting half of self-employment tax. Each of these reduces the income that flows into AGI. Itemized deductions (mortgage interest, SALT, charity) reduce taxable income but do not change AGI.
Frequently Asked Questions
Adjusted Gross Income is your total income for the tax year minus a defined list of "above-the-line" adjustments. It appears on Form 1040, line 11. AGI is the starting point for almost every other tax calculation — the standard deduction, itemized deductions, taxable income, and many credits all key off AGI or a modified version of it (MAGI).
Box 1 of your W-2 (wages, tips, other compensation) is the starting point for wage income, not your AGI. To get to AGI, you add Box 1 to other income — taxable interest, dividends, capital gains, IRA distributions, self-employment net profit, and similar items — then subtract above-the-line adjustments (HSA contributions, student loan interest, traditional IRA deduction, half of self-employment tax, etc.). AGI is the result. The calculator on this page implements that formula line by line.
Gross income is everything taxable you received in the year — wages, business profit, investment income, retirement distributions, and so on. Adjusted Gross Income is gross income minus the specific above-the-line deductions Congress has authorized: HSA contributions, traditional IRA deductions, student loan interest (up to $2,500), educator expenses, half of self-employment tax, deductible SEP/SIMPLE contributions, and a handful of others. AGI is always less than or equal to gross income.
Modified Adjusted Gross Income (MAGI) is AGI with certain deductions added back, and the exact add-backs vary by tax provision. For Roth IRA eligibility, MAGI adds back the traditional IRA deduction. For the Net Investment Income Tax, MAGI adds back foreign earned income exclusion. For ACA premium tax credits, MAGI adds back non-taxable Social Security, foreign income, and tax-exempt interest. Always check the definition for the specific provision you are evaluating — there is no single MAGI.
AGI determines eligibility and phase-outs for many tax benefits: traditional and Roth IRA contributions, the Saver's Credit, the Child Tax Credit, education credits (American Opportunity and Lifetime Learning), the medical-expense deduction floor (7.5% of AGI), and most state income tax calculations start from federal AGI. Lower AGI generally means lower federal tax and broader access to credits, so above-the-line adjustments (which reduce AGI) are more valuable than below-the-line itemized deductions for many filers.
Above-the-line strategies that directly reduce AGI include: contributing to a traditional 401(k) or 403(b) through your employer (the contribution comes out of Box 1 wages before AGI), contributing to a Health Savings Account (HSA), contributing to a traditional IRA if you qualify for the deduction, paying student loan interest, making deductible SEP-IRA or solo 401(k) contributions if self-employed, and deducting half of self-employment tax. Each of these reduces the income that flows into AGI. Itemized deductions (mortgage interest, SALT, charity) reduce taxable income but do not change AGI.
AGI computation follows IRS Form 1040 (lines 1–10 for total income, Schedule 1 Part II for adjustments). Calculator output reflects the AGI on Form 1040 line 11. Tax law in effect for tax year 2025. Not tax advice — consult a qualified tax professional for filing decisions.