US Taxable Income Calculator (2025)
Gross income → adjustments → AGI → standard or itemized deductions → taxable income, step by step.
Wages, self-employment, and other income, before any deductions.
US Taxable Income Calculator
Three numbers get conflated constantly, and they’re not the same thing. Gross income is everything you earned. Adjusted Gross Income (AGI) is gross income minus a specific set of “above-the-line” adjustments — traditional 401(k)/IRA contributions, HSA contributions, student loan interest — that reduce your income before deductions even enter the picture. Taxable income is AGI minus your standard deduction or itemized deductions, whichever is larger — the number your federal tax brackets actually apply to. This calculator walks through all three steps and, at the deduction stage, computes both the standard and itemized paths so you can see which one actually helps you.
Above-the-Line Adjustments
For 2025: Traditional 401(k)/403(b) contributions up to $23,500, Traditional IRA contributions up to $7,000, HSA contributions up to $4,300 (self-only) or $8,550 (family), and student loan interest up to $2,500 — though that last one phases out between $85,000-$100,000 MAGI (single/HOH) or $170,000-$200,000 (married filing jointly), and isn’t available at all if you file Married Filing Separately. These reduce AGI regardless of whether you itemize afterward — unlike itemized deductions, you get them either way.
Standard vs. Itemized: The New SALT Math
The 2025 standard deduction is $15,750 (single), $31,500 (married filing jointly), $23,625 (head of household), or $15,750 (married filing separately) — the same post-OBBBA figures used throughout this site’s other calculators.
Itemizing only helps if your itemized total beats that. The single biggest 2025 change here: the One Big Beautiful Bill Act raised the SALT (state and local tax) deduction cap from $10,000 to $40,000 — a huge shift for itemizers in high-tax states, who were capped at $10,000 since 2018. The higher cap phases back down toward $10,000 for taxpayers with income above $500,000. Add mortgage interest, charitable giving, and medical expenses above 7.5% of AGI, and for many homeowners in high-tax states, itemizing is suddenly worth revisiting even if it wasn’t for the past several years.
Example: $120,000 Single, $15,000 SALT, $8,000 Mortgage Interest
No adjustments, AGI stays at $120,000. Standard deduction: $15,750, taxable income $104,250. Itemized: $15,000 SALT (comfortably under the new $40,000 cap) + $8,000 mortgage interest = $23,000, taxable income $97,000 — itemizing wins here by $7,250, something that wouldn’t have been true under the old $10,000 SALT cap (that math would have given only $18,000 itemized, barely above the standard deduction).
What This Calculator Doesn’t Model
The Qualified Business Income (QBI) 20% deduction for pass-through business owners (its phase-outs and wage/property limitations are genuinely complex and not modeled here); the Alternative Minimum Tax; the exact mortgage-interest acquisition-debt cap ($750,000); charitable-contribution AGI percentage limits; and catch-up contribution amounts for savers 50+ on 401(k)/IRA or 55+/60-63 on HSA/401(k). Mortgage interest and charitable contributions are taken at face value in the itemized total.
Frequently Asked Questions
What’s the difference between gross income, AGI, and taxable income?
Gross income is everything you earned before anything comes out. Adjusted Gross Income (AGI) is gross income minus above-the-line adjustments like traditional 401(k)/IRA contributions, HSA contributions, and the student loan interest deduction. Taxable income is AGI minus your standard deduction or itemized deductions, whichever you choose — it’s the number your tax brackets actually apply to.
How do I know if itemizing is worth it?
Itemizing only helps if your itemized deductions (state and local taxes up to the cap, mortgage interest, charitable giving, and medical expenses above 7.5% of AGI) add up to more than your standard deduction. This calculator computes both and shows you which is larger.
What changed with the SALT deduction cap in 2025?
The One Big Beautiful Bill Act raised the SALT deduction cap from $10,000 to $40,000 for 2025, a major change for itemizers in high-tax states. The higher cap phases back down toward $10,000 for taxpayers with MAGI above $500,000.
Does this calculator include the QBI deduction for business owners?
No. The 20% Qualified Business Income deduction has its own complex rules (phase-outs for certain service businesses, wage/property limitations at higher incomes) that aren’t modeled in this calculator.
This calculator provides a simplified estimate of 2025 taxable income. It does not model the QBI deduction, AMT, exact mortgage-interest or charitable-contribution caps, or catch-up contribution limits. Check the relevant government tax authority or a qualified tax professional for advice about your specific situation.
