Income Tax Estimator
Estimate annual income tax liability using standard brackets.
About the Income Tax Estimator
This U.S. federal income tax estimator uses the 2024 IRS tax brackets to estimate the federal income tax owed on a given annual income, after applying the standard deduction. Enter your annual gross income, filing status (single, married filing jointly, or head of household), and the standard deduction for your filing status, and the tool returns the federal tax owed, your marginal tax rate, your effective (average) tax rate, and your after-tax income.
The 2024 standard deductions are $14,600 (single), $29,200 (married filing jointly), and $21,900 (head of household). The estimator uses progressive tax brackets — only the portion of income in each bracket is taxed at that bracket's rate, not your entire income. A single filer earning $75,000 pays 10% on the first $11,600, 12% on income from $11,600 to $47,150, and 22% on income from $47,150 to $60,400 (taxable income after the $14,600 standard deduction).
This tool estimates federal income tax only. It does not include state income tax (which varies from 0% in Texas/Florida to 13.3% in California), FICA (Social Security 6.2% + Medicare 1.45% = 7.65% employee share), or any credits, deductions, or additional taxes. Treat the result as a rough planning estimate, not a substitute for tax software or a CPA.
How It Works
The estimator applies the 2024 federal tax brackets progressively:
For each bracket [threshold, rate]: if taxable > threshold then tax += (min(taxable, threshold) - prev) * rate; prev = threshold; else tax += (taxable - prev) * rate; break2024 brackets for single filers:
- 10% on $0 - $11,600
- 12% on $11,600 - $47,150
- 22% on $47,150 - $100,525
- 24% on $100,525 - $191,950
- 32% on $191,950 - $243,725
- 35% on $243,725 - $609,350
- 37% on income above $609,350
The marginal rate is the rate on your last dollar earned — what most people mean when they say 'I'm in the 22% bracket.' The effective rate is total tax divided by gross income — the actual percentage of your income that goes to federal income tax, typically much lower than the marginal rate.
Married filing jointly brackets are roughly double the single brackets (with some variation at the top), and head of household brackets fall between single and married.
Worked Examples
Suppose you are a single filer with $75,000 gross income in 2024.
- Standard deduction: $14,600
- Taxable income: $75,000 - $14,600 = $60,400
- Tax in 10% bracket: $11,600 * 0.10 = $1,160
- Tax in 12% bracket: ($47,150 - $11,600) * 0.12 = $35,550 * 0.12 = $4,266
- Tax in 22% bracket: ($60,400 - $47,150) * 0.22 = $13,250 * 0.22 = $2,915
- Total federal tax: $1,160 + $4,266 + $2,915 = $8,341
- Marginal rate: 22% (rate on last dollar earned)
- Effective rate: $8,341 / $75,000 = 11.12%
- After-tax income: $75,000 - $8,341 = $66,659
For a married couple filing jointly with $150,000 combined income: taxable income = $120,800, federal tax = $19,242, effective rate = 12.83%, marginal rate = 22%.
Note that FICA adds another 7.65% ($5,738 on $75,000) and state income tax (if applicable) adds 0-9% more. The total tax burden on a $75,000 single income is typically $14,000-$17,000 in a high-tax state.
When to Use This Tool
Use this income tax estimator when:
- Estimating your federal tax liability before year-end to plan charitable contributions or 401(k) contributions
- Comparing the tax impact of changing filing status (e.g., after marriage)
- Evaluating whether to take the standard deduction or itemize (compare itemized deductions to the standard)
- Projecting after-tax income for budgeting a job offer
- Estimating the tax impact of a raise, bonus, or side income
- Demonstrating progressive taxation in a civics or personal finance class
- Comparing tax burden across states when considering relocation (state tax must be added separately)
This tool estimates federal income tax only. For a complete tax projection, also account for state income tax, FICA, and any tax credits you qualify for (Child Tax Credit, Earned Income Credit, education credits).
Limitations & Disclaimer
This estimator applies 2024 IRS federal income tax brackets for single, married filing jointly, and head of household filing statuses. It applies only the standard deduction and does not model itemized deductions, tax credits (Child Tax Credit, Earned Income Credit, education credits, foreign tax credit), alternative minimum tax (AMT), net investment income tax (NIIT), self-employment tax, capital gains rates, qualified business income deduction (QBI), state or local income tax, FICA, or any other tax. The result is a rough planning estimate only and may differ from your actual tax liability by thousands of dollars. Always use IRS Form 1040, tax software, or a CPA to compute your actual tax. This is an educational tool, not tax advice. See our disclaimer for full terms.
Frequently Asked Questions
What is the difference between marginal and effective tax rate?
Marginal rate is the rate on your last dollar of taxable income — the bracket your top dollar falls into. Effective rate is total tax divided by total income — the actual percentage of income paid in tax. A single filer at $75,000 has a 22% marginal rate but only an 11.12% effective rate, because most income is taxed in lower brackets.
Does this include state income tax?
No. State income tax varies widely: 0% in Texas, Florida, Nevada, Washington, Wyoming, South Dakota, Alaska, Tennessee, and New Hampshire (on wages); up to 13.3% in California (top marginal rate). Add state tax separately based on your state's brackets and rules.
Does this include FICA (Social Security and Medicare)?
No. FICA adds 7.65% on wages up to the Social Security wage base ($168,600 in 2024) for Social Security (6.2%) plus 1.45% on all wages for Medicare. Self-employed individuals pay both halves (15.3% total) via self-employment tax. Add FICA separately for total tax burden.
Should I take the standard deduction or itemize?
Take whichever is higher. Itemize if your total itemized deductions (mortgage interest, state/local taxes up to $10,000, charitable contributions, medical expenses over 7.5% of AGI) exceed the standard deduction for your filing status. After the 2017 Tax Cuts and Jobs Act raised standard deductions, about 90% of filers now take the standard.
Are tax brackets adjusted for inflation?
Yes — the IRS adjusts brackets, standard deductions, and many other parameters annually for inflation using the chained CPI-U. The 2024 brackets are roughly 5.4% higher than 2023, reflecting 2022-2023 inflation. Use the current year's brackets when estimating.
What about capital gains tax?
Long-term capital gains (assets held over 1 year) are taxed at preferential rates: 0% for income below $47,025 (single, 2024), 15% for $47,025-$518,900, and 20% above. Short-term gains are taxed as ordinary income at your marginal rate. This calculator does not handle capital gains — use a dedicated capital gains calculator or tax software.
Last updated: July 21, 2026 · Author: HT99 Tools Editorial Team · Reviewed by: HT99 Tools Editorial Team