Adjusted Gross Income (AGI) Calculator
How to Use This Calculator
- 1
Enter Total Income
Add your income before adjustments, including wages and other income sources.
- 2
Enter Adjustments to Income
Add eligible above-the-line adjustments, such as deductible student loan interest or qualifying retirement contributions. Do not enter the standard deduction here.
- 3
Review the estimates
The calculator subtracts adjustments from income, then estimates taxable income, a marginal bracket, and an effective rate using its built-in single-filer tax assumptions.
Example Calculation
A single filer enters $80,000 of total income and $5,000 of adjustments to estimate AGI and taxable income.
Total Income ($)
80,000
Adjustments to Income ($)
5,000
Results
Adjusted Gross Income (AGI)
$75,000
Total Adjustments
$5,000
Adjustment Rate
6.25%
Est. Taxable Income
$61,150
Marginal Tax Bracket
22%
Effective Tax Rate
14.33%
Insights card shows AGI range and adjustment-quality labels.
Tips
A $2,000 adjustment reduces AGI by $2,000
Change Adjustments to Income from $5,000 to $7,000 to see the direct AGI reduction and how the estimated taxable income and effective tax rate respond.
A deduction does not reduce tax by its full amount
Try a $1,000 adjustment while taxable income remains in the 22% bracket: the approximate federal income-tax reduction is $220, not $1,000, before credits and other tax rules.
Check the tax year before using the estimate
This calculator uses 2023 single-filer brackets and a $13,850 standard deduction in its calculation, although one result label refers to the 2024 $14,600 deduction. Use the IRS figures for the tax year you are filing.
What this AGI calculator estimates
Adjusted gross income (AGI) is total income minus eligible adjustments to income. This calculator also estimates taxable income, a marginal federal tax bracket, and an effective tax rate, but its tax estimates are not a tax return or a current-year tax projection.
How the calculation works
AGI = total income − adjustments to income
Estimated taxable income = max(0, AGI − standard deduction)
Estimated tax = tax calculated across progressive brackets
Effective tax rate = estimated tax ÷ estimated taxable income × 100
The calculator’s taxable-income formula uses a $13,850 standard deduction and 2023 single-filer federal tax brackets. The calculation does not use the user’s filing status, credits, itemized deductions, state taxes, or other tax-specific details.
For the example, AGI is $80,000 − $5,000 = $75,000. Estimated taxable income is $75,000 − $13,850 = $61,150. Under the calculator’s 2023 brackets, estimated tax is $5,147 + (($61,150 − $44,725) × 22%) = $8,760.50. The effective rate is $8,760.50 ÷ $61,150 × 100 = 14.33%; the marginal rate is 22%.
The IRS explains how AGI is used in federal tax calculations. For a different estimate focused on income before deductions, use the gross income estimator; for an adjusted income measure used in a different context, see the adjusted net income calculator.
How adjustments affect the estimate
An adjustment reduces AGI dollar for dollar, but its tax effect depends on the taxable income left after deductions and the applicable marginal rates. For example, a $1,000 adjustment generally reduces estimated tax by about $120 if the full deduction falls in a 12% bracket, or $220 if it falls in a 22% bracket. This is an estimate, not a tax credit: a credit generally reduces tax directly, while a deduction reduces the income subject to tax.
| Change to the inputs | AGI change | Approximate tax effect if the full deduction falls in the stated bracket |
|---|---|---|
| Add $1,000 of adjustments in the 12% bracket | −$1,000 | About $120 less tax |
| Add $1,000 of adjustments in the 22% bracket | −$1,000 | About $220 less tax |
| Add $1,000 of adjustments in the 24% bracket | −$1,000 | About $240 less tax |
These estimates assume the adjustment is eligible and the deduction does not move income across a bracket boundary. Eligibility limits and phaseouts can change the result. Use the state income tax calculator for a separate state estimate and the self-employment tax calculator for self-employment tax.
Tax-year and filing-status limitation
The calculator combines 2023 single-filer thresholds with a result label that refers to the 2024 standard deduction. Its formula subtracts $13,850, not $14,600. Tax brackets and deductions vary by year and filing status, so do not use these results to set withholding or determine a final tax bill. The IRS publishes the applicable federal income tax rates and brackets and annual inflation adjustments.
When to use a different calculator
- Estimate state income tax → state income tax calculator
- Estimate tax on self-employment earnings → self-employment tax calculator
- Calculate income before deductions → gross income estimator
- Adjust business earnings for non-recurring items → adjusted net income calculator
Frequently Asked Questions
What is adjusted gross income?
Adjusted gross income (AGI) is total income minus eligible adjustments to income. It is calculated before subtracting the standard or itemized deduction, and it is used in many federal tax calculations.
How do I calculate AGI?
1. Add your income sources included in gross income. 2. Add eligible adjustments, such as qualifying student loan interest or deductible contributions. 3. Subtract adjustments from total income: AGI = total income − adjustments.
Is AGI the same as taxable income?
No. AGI is calculated before the standard or itemized deduction and other allowable deductions. Taxable income is generally the amount left after those deductions and other applicable adjustments.
Does a tax bracket apply to all of my income?
No. Federal income tax brackets are marginal: each rate applies only to the portion of taxable income within that bracket. This calculator’s bracket and tax estimates use 2023 single-filer thresholds, so they are not a current-year tax calculation.
What standard deduction does this calculator use?
Its taxable-income formula subtracts $13,850, the 2023 standard deduction for a single filer, even though the result label says $14,600. The IRS lists the 2023 tax inflation adjustments and the separate 2024 tax inflation adjustments; use the figures for your filing year and filing status.