Tax Calculator
Estimate your annual federal tax liability. This calculator applies official progressive IRS income tax brackets and standard deductions to determine your marginal rate, effective tax, and after-tax income.
Total annual earnings from wages, self-employment, and investments
IRS legal filing status determines standard deduction and brackets
Standard deduction ($14,600 Single / $29,200 Married for 2024)
Mortgage interest, state taxes, and qualifying charitable contributions
Total federal income tax before credits
How to Use This Calculator
- Enter your expected gross annual earned income from all sources.
- Select your official filing status (Single or Married Filing Jointly).
- Choose between the IRS standard deduction or custom itemized deductions.
- Inspect your total federal tax liability, your effective average rate, and your top marginal bracket.
Formula & Calculation Methodology
The United States utilizes a progressive marginal tax system: income is partitioned into brackets where only the portion within each tier is taxed at that tiers specified rate.
Worked Example
Single filer earning $85,000 using standard deduction ($14,600)
Frequently Asked Questions
What is the crucial difference between Marginal and Effective tax rate?↓
Your marginal tax rate is the tax percentage applied strictly to your highest dollar of earnings. Your effective tax rate is the blended average percentage you actually pay across your entire gross income, which is always lower.
Does this calculator include FICA payroll taxes (Social Security & Medicare)?↓
This calculator models pure Federal Income Tax. FICA taxes add a mandatory 6.2% for Social Security (capped at $168,600) and 1.45% for Medicare on earned wages.
When should I itemize instead of taking the standard deduction?↓
You should itemize only if your total qualifying deductible expenses (mortgage interest, medical costs exceeding 7.5% of AGI, state/local taxes up to the $10k SALT cap, and donations) exceed the standard deduction threshold.
Are state or local income taxes reflected in this figure?↓
No, state income taxes vary widely by jurisdiction (from 0% in states like Texas and Florida to over 13% in California). This tool focuses on Federal Income Tax obligations.
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Source Citation & Disclaimer
Informational tool only; not licensed tax, legal, or financial advice.