🧮 Calculate Your Federal Tax Auto Year

Filing Status

Tax Year

Gross Annual Income

Additional Income (freelance, etc.)

Deduction Type

Itemized Deduction Amount

Standard Deduction (Selected Year)

Pre-tax Deductions (401k, HSA, etc.)

Tax Credits

⚠️ Disclaimer: Estimates for educational purposes only. Does not account for all deductions, credits, AMT, or state taxes. Consult a tax professional for your specific situation.

📋 Federal Tax Brackets Current Year

Rate	Income Range	Max Tax in Bracket

📐 How US Federal Income Tax Works

Step 1: Total Income

Total Income = Wages + Freelance + Investment + Other Sources

Step 2: Pre-Tax Deductions → AGI

AGI = Total Income − 401(k) − HSA − Other Pre-Tax Deductions

Step 3: Standard or Itemized Deduction

Taxable Income = AGI − Deduction (whichever is greater)

IRS adjusts the standard deduction for inflation each year.
This calculator always uses the correct amount for the selected year.

Step 4: Progressive Tax Brackets

The US uses a marginal (progressive) system. Only income within each bracket is taxed at that rate.

Brackets are inflation-adjusted annually by the IRS.
This calculator automatically uses the correct brackets
for whichever tax year you select.

Effective Rate = Total Tax / Gross Income × 100%
Marginal Rate = Rate on your last dollar earned

Step 5: Subtract Credits

Final Tax = Calculated Tax − Tax Credits

Credits reduce tax dollar-for-dollar (more powerful than deductions).

⚙️ How Auto-Year Updates Work

This calculator stores bracket data for all known years.
When you open it, it automatically selects the current
filing year (typically the year just ended or current year).

Every January, when the IRS releases new brackets,
the data below is updated and the calculator auto-selects
the new year. Historical years remain available in the dropdown.

Current date: —

❓ Frequently Asked Questions

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🇺🇸 US Federal Income Tax Calculator

🧮 Calculate Your Federal Tax Auto Year

📊 Income Breakdown

📋 Tax Bracket Breakdown

🔍 Full Tax Calculation

📅 Pay Period Breakdown