Income Tax Calculator
Adjust the inputs below. Results update as you type.
How it works
An income-tax estimate helps you approximate federal liability from taxable income, filing status, and common adjustments—before you treat a paycheck or offer letter as final take-home pay. Numbarn’s calculator focuses on educational federal estimates using published bracket-style logic for a labeled tax year; it is not a filing product and does not replace tax software or a preparer.
Enter filing status and income components carefully. Distinguish gross wages from taxable income after deductions. Credits, AMT, NIIT, and many specialized adjustments are outside a simplified model. State and local taxes can dominate in some jurisdictions; run a separate state estimate when location matters.
Use the output to compare scenarios: a bonus, a side hustle, or a filing-status change. Then verify withholding with a paycheck or W-4 style tool so your employer deposits align with expected liability. Always confirm the tax year label on the page matches the rules you intend to model.
Input guidance
- Match filing status to how you expect to file for the tax year shown.
- Separate gross wages from taxable income after deductions when the form asks.
- Treat credits and unusual adjustments as follow-up checks outside the simple model.
The formula
Tax uses progressive brackets: each slice of taxable income is taxed at its bracket's rate, then summed. Taxable income = gross income − deductions; tax owed = sum over brackets − credits.
Worked example
A single filer with $60,000 taxable income does not pay one flat rate — lower portions are taxed at 10% and 12% and only the top slice at 22%, giving an effective rate well below 22%.
More examples to test
- Single filer with $95,000 taxable income: estimate federal tax before credits.
- Compare married filing jointly vs separate on the same household income split.
How to interpret results
Use the estimate to compare scenarios and withholding needs, then confirm with filing software or a preparer before sending money or paperwork.
When this can be inaccurate
State tax, AMT, NIIT, and many credits are incomplete or omitted. Tax-year brackets must match the labeled year.
Change history
- July 2026: Clarified educational federal scope and tax-year labeling.
- June 2026: Federal estimate path reviewed for publication.
Site-wide corrections also appear on the corrections log.
Frequently asked questions
What is the difference between marginal and effective rate?+
Your marginal rate is the bracket your last dollar falls in; your effective rate is total tax divided by total income, which is always lower under a progressive system.
Do deductions or credits save more?+
Credits cut tax dollar-for-dollar, so they are worth more than deductions, which only reduce the income that gets taxed.
Is this exact?+
It is an estimate. Real tax depends on filing status, state taxes, specific deductions, and credits — use it for planning, not filing.
Does this replace tax software or a preparer?+
No. It is an educational federal estimate for scenario planning. Use filing software or a qualified preparer for returns and complex credits.
When should I refresh this tax estimate?+
Re-run after income changes, filing-status changes, large deductions or credits, or when IRS brackets and standard deduction amounts update for a new tax year.
Guided next steps
Want the full workflow? Use this calculator inside a step-by-step guide.
Related calculators
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