Income Tax Calculator
Estimate your federal income tax, effective rate, and take-home pay for 2024
2024 Tax Year: Uses current federal tax brackets. State taxes not included. This is an estimate—consult a tax professional for accurate filing.
How to Use This Income Tax Calculator
- Enter your annual gross income (before any deductions)
- Select your filing status: Single, Married Filing Jointly, Married Filing Separately, or Head of Household
- Choose standard deduction or enter your itemized deductions if they exceed the standard amount
- Add pre-tax contributions: 401(k) up to $23,500 ($31,000 if 50+) and HSA up to $4,300 individual or $8,550 family
- Click 'Calculate Tax' to see your federal tax liability and take-home pay
Example: A single filer earning $85,000 with $10,000 in 401(k) contributions has taxable income of $60,400 after the $14,600 standard deduction. Federal tax: approximately $8,600, for an effective rate of 10.1%.
Tip: Maximize pre-tax contributions to lower your taxable income. Every dollar contributed to a traditional 401(k) reduces your tax bill by your marginal rate.
Why Use a Income Tax Calculator?
Understanding your federal tax liability helps you plan withholdings, maximize deductions, and keep more of what you earn.
- Estimate quarterly taxes if you're self-employed or have significant non-wage income
- Decide whether to itemize deductions or take the standard deduction
- Calculate the tax impact of a raise, bonus, or side income
- Determine optimal 401(k) and HSA contribution amounts for tax savings
- Compare tax liability across different filing statuses before marriage
- Plan year-end strategies like charitable giving or retirement contributions
Understanding Your Results
Your effective tax rate (total tax divided by gross income) is typically much lower than your marginal bracket.
| Result | Meaning | Action |
|---|---|---|
| Effective rate under 10% | Low tax burden | You're likely in lower brackets or have significant deductions. Consider Roth contributions. |
| Effective rate 10-18% | Moderate tax burden | Most middle-income earners fall here. Maximize pre-tax contributions. |
| Effective rate 18-25% | Higher tax burden | Look into tax-loss harvesting, backdoor Roth, and municipal bonds. |
| Effective rate above 25% | High-income tax burden | Consider working with a tax professional for advanced strategies. |
Meaning: Low tax burden
Action: You're likely in lower brackets or have significant deductions. Consider Roth contributions.
Meaning: Moderate tax burden
Action: Most middle-income earners fall here. Maximize pre-tax contributions.
Meaning: Higher tax burden
Action: Look into tax-loss harvesting, backdoor Roth, and municipal bonds.
Meaning: High-income tax burden
Action: Consider working with a tax professional for advanced strategies.
Note: This calculator shows federal income tax only. State taxes, Social Security (6.2%), and Medicare (1.45%) are additional.
About Income Tax Calculator
Formula
Taxable Income = Gross Income - Pre-Tax Deductions - (Standard or Itemized Deduction) Federal tax is then calculated by applying each marginal rate to the portion of taxable income within each bracket.
Current Standards: 2026 standard deductions: $14,600 (Single), $29,200 (Married Filing Jointly), $21,900 (Head of Household). 401(k) limit: $23,500 ($31,000 if 50+). HSA limit: $4,300 individual, $8,550 family.
Frequently Asked Questions
What's the difference between marginal and effective tax rate?
Your marginal rate is the percentage applied to your last dollar of income (your tax bracket). Your effective rate is your total tax divided by total income. If you're in the 22% bracket, only income above $48,475 (single) is taxed at 22%. Your effective rate might be 14-16%.
Should I contribute to traditional or Roth 401(k)?
Traditional contributions lower your taxable income now and you pay taxes in retirement. Roth contributions are taxed now but grow tax-free. If you expect higher taxes in retirement (early career, low current income), Roth may be better. If you're in peak earning years with high marginal rates, traditional often wins.
When should I itemize instead of taking the standard deduction?
Itemize only when your total itemizable deductions exceed your standard deduction. Common itemizable expenses include mortgage interest, state/local taxes (capped at $10,000), charitable donations, and medical expenses exceeding 7.5% of AGI. Most taxpayers now take the standard deduction.
How do I estimate my quarterly tax payments?
Divide your expected annual tax by four for quarterly payments due April 15, June 15, September 15, and January 15. You can also base payments on last year's tax (110% if income exceeded $150,000). Underpayment penalties apply if you pay less than 90% of current year tax or 100% (110%) of prior year.
Does this calculator include state taxes?
No, this estimates federal income tax only. State income taxes range from 0% (Texas, Florida, Nevada) to over 13% (California top bracket). Add approximately 5-7% for most states with income tax. FICA taxes (Social Security 6.2%, Medicare 1.45%) are also separate.