💰 Income Sources (Form 1040 Lines 1–8)
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Enter a valid wage amount.
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Net profit from Schedule C
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Net amount (can be negative if loss)
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Taxable Social Security, retirement, unemployment
➖ Above-the-Line Deductions (Schedule 1, Part II)
Student Loan Interest
Max $2,500 | Phases out $85K–$100K (single) / $175K–$205K (MFJ)
Educator Expenses
Max $300 single / $600 MFJ (K-12 teachers and staff)
HSA Contributions (your own, not employer)
Max $4,300 self-only / $8,550 family (2026) | +$1,000 age 55+
Traditional IRA Contributions (deductible)
Max $7,000 / $8,000 age 50+ | Phase-outs apply if you have workplace plan
Self-Employed Health Insurance
100% of premiums paid for yourself and family
Alimony Paid (pre-2019 agreements only)
Post-2018 divorce agreements: alimony is NOT deductible
Other Adjustments (SEP/SIMPLE IRA, moving, etc.)
SE retirement plan contributions, qualified moving expenses
📋 Filing Information
Standard: $15,750 single / $31,500 MFJ / $23,625 HOH (est. 2026)
Your 2026 Adjusted Gross Income
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AGI-Gated Benefit Eligibility (2026)
⚠️ Disclaimer: This calculator provides estimates for educational and planning purposes only. It does not constitute tax advice. SE tax deduction is estimated from net SE income using the IRS formula (net SE income x 0.9235 x 0.153 x 0.50). Actual AGI depends on your specific tax situation. Always verify with a qualified tax professional or your official Form 1040. 2026 limits are estimates based on projected IRS inflation adjustments.
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Sources & Methodology
AGI formula per IRS Form 1040 Line 11 and Schedule 1 (Additional Income and Adjustments). All deduction limits based on IRS publications and projected 2026 inflation adjustments. SE tax formula from IRS Self-Employment Tax instructions.
IRS — Adjusted Gross Income Definition and Formula
Official IRS definition and calculation methodology for AGI: gross income minus Schedule 1 above-the-line adjustments, appearing on Form 1040 Line 11. Source for the core AGI formula used in this calculator.
IRS Publication 17 — Your Federal Income Tax (2025)
Comprehensive IRS guide to all income sources, above-the-line deductions, and their limits. Source for deduction caps, phase-out thresholds, and eligibility rules used in AGI calculation and benefit eligibility checks.
IRS — Self-Employment Tax (Social Security and Medicare Taxes)
Official IRS formula for computing self-employment tax: Net SE income x 0.9235 x 15.3%. The above-the-line deduction equals 50% of the computed SE tax, reducing AGI for self-employed individuals.
Verified Formulas (IRS-confirmed):
Gross Income = Wages + SE Income + Interest/Divs + Capital Gains + Rental + Other
SE Tax = Net SE Income x 0.9235 x 0.153 (15.3% = 12.4% SS + 2.9% Medicare)
SE Tax Deduction = SE Tax x 0.50 (above-the-line deduction)
Total Adjustments = All above-the-line deductions (student loan + educator + HSA + IRA + SE health + SE tax ded + alimony + other)
AGI = Gross Income - Total Adjustments
Estimated Taxable Income = AGI - Standard Deduction (or itemized)
2026 standard deductions estimated: $15,750 single, $31,500 MFJ, $23,625 HOH (projected CPI adjustment from 2025 figures). Roth IRA phase-outs 2026: $150,000-$165,000 single; $236,000-$246,000 MFJ.
What Is AGI and How to Calculate It in 2026 — Complete IRS Guide
Adjusted Gross Income is the single most important number in your federal tax return. It is not your salary, not your take-home pay, and not your taxable income — it sits between them. Every major tax benefit you are eligible for in 2026 flows through this number: your ability to contribute to a Roth IRA, your student loan interest deduction, your education credits, your eligibility for premium tax credits on the ACA marketplace, and even the threshold at which your Social Security benefits become taxable.
The IRS AGI Formula (Form 1040, Line 11)
AGI = Total Gross Income (Line 9) - Total Adjustments (Line 10 from Schedule 1)
Step-by-step IRS calculation:
Line 1-8: Add all income sources (wages, SE, interest, dividends, capital gains, rental, retirement, Social Security, unemployment)
Line 9: Sum = Gross Income
Schedule 1, Part II: List all above-the-line adjustments
Line 10: Total adjustments
Line 11: AGI = Line 9 - Line 10
The IRS example: Total income $71,000, adjustments $2,750 → AGI = $68,250
Line 1-8: Add all income sources (wages, SE, interest, dividends, capital gains, rental, retirement, Social Security, unemployment)
Line 9: Sum = Gross Income
Schedule 1, Part II: List all above-the-line adjustments
Line 10: Total adjustments
Line 11: AGI = Line 9 - Line 10
The IRS example: Total income $71,000, adjustments $2,750 → AGI = $68,250
All Above-the-Line Deductions That Reduce AGI (2026)
| Deduction | 2026 Limit | Who Qualifies | Phase-out |
|---|---|---|---|
| Student loan interest | $2,500 | Anyone who paid qualified student loan interest | $85K–$100K single / $175K–$205K MFJ |
| Educator expenses | $300 / $600 MFJ | K-12 teachers, instructors, principals, aides (900+ hrs) | None |
| HSA contributions | $4,300 self / $8,550 family | HDHP enrollees who contribute directly (not through payroll) | None (must have qualifying HDHP) |
| Traditional IRA | $7,000 / $8,000 age 50+ | Those without workplace plan, or with lower income | Varies by filing status and workplace plan participation |
| SE health insurance | 100% of premiums | Self-employed individuals not eligible for employer plan | Cannot exceed net SE income |
| SE tax deduction | 50% of SE tax | All self-employed with net SE income | None |
| Alimony paid | Amount paid | Pre-2019 divorce/separation agreements only | None (post-2018 = NOT deductible) |
| SEP-IRA / SIMPLE IRA | 25% of net SE / up to $69,000 | Self-employed with qualifying retirement plan | None |
AGI vs MAGI: Why They Are Different and When Each Matters
AGI appears on Line 11 of Form 1040. MAGI (Modified Adjusted Gross Income) is your AGI with specific deductions added back, and the definition changes depending on which tax provision is being evaluated. For Roth IRA contribution limits, MAGI = AGI plus your traditional IRA deduction plus student loan interest deduction. For ACA premium subsidies, MAGI = AGI plus tax-exempt interest plus foreign income exclusion. For most W-2 employees who do not itemize and have no IRA deduction, MAGI and AGI are identical.
Why AGI Matters: Benefits Gated by This Number
- Roth IRA contributions: Phase out between $150,000–$165,000 (single) and $236,000–$246,000 (MFJ) based on MAGI. Above the limit, no direct Roth IRA contribution is allowed.
- Student loan interest: Deduction phases out $85,000–$100,000 single / $175,000–$205,000 MFJ. Above the limit, zero deduction regardless of interest paid.
- American Opportunity Tax Credit: Phases out $80,000–$90,000 single / $160,000–$180,000 MFJ based on MAGI. Worth up to $2,500 per eligible student.
- Lifetime Learning Credit: Phases out $80,000–$90,000 single / $160,000–$180,000 MFJ. Worth up to $2,000 per return.
- Medical expense deductions: Only the portion exceeding 7.5% of AGI is deductible if you itemize. Lower AGI = lower threshold = more deductible.
- ACA premium tax credits: Available for household income 100%–400% of federal poverty level, calculated using MAGI. Reducing AGI increases subsidy eligibility.
- IRMAA (Medicare surcharge): Affects Part B and Part D premiums for high-income Medicare enrollees based on AGI from 2 years prior. Over specific thresholds, premiums increase substantially.
💡 AGI reduction strategy: Every dollar you reduce your AGI can have cascading effects. Maximising HSA contributions ($8,550 family) + traditional IRA ($8,000 age 50+) + SEP-IRA (if self-employed) can reduce AGI by $25,000 or more, potentially unlocking student loan interest deductions, education credits, Roth IRA eligibility, or ACA subsidies worth thousands of dollars. Run this calculator with and without each deduction to see the exact impact.
Self-Employment AGI: The SE Tax Deduction Most Miss
Self-employed individuals pay both the employee and employer portions of FICA — totalling 15.3% on 92.35% of net self-employment income. The IRS allows deducting 50% of the computed SE tax as an above-the-line adjustment on Schedule 1. This represents the employer-equivalent portion that employees never pay personally. On $60,000 net SE income, this deduction is approximately $4,239, directly reducing AGI by that amount. Combined with SEP-IRA contributions, self-employed individuals often have far more AGI reduction tools available than W-2 employees.
Frequently Asked Questions
AGI is your total gross income from all sources minus specific above-the-line deductions. It appears on Line 11 of Form 1040. AGI is calculated before you take the standard deduction or itemize deductions. It serves as the gating number controlling eligibility for Roth IRA contributions, student loan interest deductions, education credits, ACA subsidies, and dozens of other tax benefits.
AGI = Total Gross Income - Above-the-Line Deductions. Step 1: Add all income (wages, SE, interest, dividends, capital gains, rental, SS, retirement, unemployment). Step 2: Subtract Schedule 1 adjustments (student loan interest up to $2,500, educator expenses $300, HSA up to $8,550, IRA up to $7,000, SE health insurance, 50% of SE tax, alimony paid pre-2019). The result is your AGI on Form 1040, Line 11.
You can deduct up to $2,500 of student loan interest. The deduction phases out for single filers with MAGI between $85,000 and $100,000 (completely eliminated above $100,000). For married filing jointly, the phase-out range is $175,000 to $205,000. If your AGI is below the phase-out start, you can deduct the full amount paid up to $2,500.
Roth IRA contributions phase out based on MAGI. For 2026: single filers phase out $150,000-$165,000; married filing jointly $236,000-$246,000. Above the upper limit, no direct Roth IRA contribution is allowed (though a backdoor Roth conversion may be available). MAGI for Roth IRA = AGI + traditional IRA deduction + student loan interest deduction added back.
AGI is on Form 1040 Line 11. MAGI = AGI with certain deductions added back, and the specific add-backs vary by tax provision. For Roth IRA: MAGI = AGI + IRA deduction + student loan interest. For ACA subsidies: MAGI = AGI + tax-exempt interest + foreign income exclusion. For most W-2 employees with no IRA deduction, MAGI and AGI are identical. For self-employed individuals or those with IRA deductions, they often differ.
SE tax = Net SE income x 0.9235 x 15.3%. The above-the-line deduction = SE tax x 50%. Example: $50,000 net SE income. SE tax = $50,000 x 0.9235 x 0.153 = $7,065. Deduction = $7,065 / 2 = $3,532.50. This deduction represents the employer half of FICA taxes and reduces your AGI, lowering your federal income tax liability.
2026 HSA limits: $4,300 for self-only HDHP coverage; $8,550 for family coverage; +$1,000 catch-up for those age 55+. HSA contributions you make directly (not through payroll) are deductible above-the-line on Schedule 1, reducing your AGI. Employer HSA contributions are excluded from income and do not appear on Schedule 1. Only your own contributions above payroll reduce AGI.
Gross income includes: wages and salaries (W-2 Box 1), net self-employment income, taxable interest, dividends, net capital gains, rental and royalty income, alimony received (pre-2019 agreements), retirement distributions, taxable Social Security benefits (up to 85% depending on income), unemployment compensation, and gambling winnings. Excluded: qualified employer benefits, municipal bond interest, life insurance proceeds, and employer HSA contributions.
If you itemize, medical expenses are deductible only above 7.5% of AGI. Lower AGI = lower threshold = more deductible. Example: AGI $80,000. Threshold = $6,000. Medical expenses $8,000 = $2,000 deductible. If you reduce AGI to $70,000, threshold drops to $5,250 and $2,750 becomes deductible. Each $10,000 reduction in AGI reduces the medical deduction floor by $750.
AGI is on Line 11 of Form 1040. For prior year returns (needed for e-file identity verification), find AGI in your IRS Online Account under Records and Status, or request a free tax transcript. Prior year AGI is used by the IRS as an identity PIN when e-filing. If you used tax software, AGI appears in the return summary typically labeled as Line 11 or Adjusted Gross Income.
Yes. AGI can be zero or negative when above-the-line deductions exceed gross income. This is more common for self-employed individuals with large business losses or investors with significant capital losses and retirement contributions. A negative AGI may create a Net Operating Loss (NOL) carryforward. A negative AGI does not mean zero state taxes, as most states have different starting points. Consult a tax professional for NOL implications.
Eligible K-12 teachers, instructors, counselors, principals, and aides who work 900+ hours during a school year can deduct up to $300 in unreimbursed classroom expenses for supplies, professional development, and equipment. If both spouses are eligible educators filing jointly, the combined maximum is $600. This above-the-line deduction reduces AGI regardless of whether you take the standard deduction or itemize.
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