How Federal Income Tax Is Calculated
Federal income tax is the largest single deduction from most American paychecks. In 2026, the IRS uses seven progressive tax brackets ranging from 10% to 37%. Understanding how they work — and how they don't work — is essential to accurate paycheck planning.
Calculate Your Take-Home Pay
Enter your salary, state, and deductions — get your exact net pay in under 100ms.
2026 Federal Tax Brackets (Single Filer)
The IRS adjusts tax brackets annually for inflation. For 2026, single filers pay:
The Critical Misconception: Marginal vs Effective Rate
Most people incorrectly believe that earning $50,000 means all $50,000 is taxed at 22%. This is wrong. Progressive taxation means only the income within each bracket is taxed at that bracket's rate.
Your marginal rate is the rate on your last dollar of income. Your effective rate is your total tax divided by taxable income — always lower than the marginal rate.
Worked Example: $75,000 Salary
For a single filer earning $75,000 in 2026:
- Standard deduction: $15,000
- Taxable income: $60,000
Tax calculation:
- 10% on $11,925 = $1,193
- 12% on $36,550 ($48,475 − $11,925) = $4,386
- 22% on $11,525 ($60,000 − $48,475) = $2,536
- Total federal tax: $8,115
- Effective rate: 13.5% (not 22%)
Standard Deduction Reduces Taxable Income First
Before brackets are applied, the IRS subtracts the standard deduction. For 2026: $15,000 for single filers, $30,000 for married filing jointly. This means a single filer earning $15,000 or less owes zero federal income tax.
Important
Your marginal tax rate is NOT your effective rate. A $75,000 earner in the 22% bracket pays an effective federal rate of only ~13.5%.
Frequently Asked Questions
$15,000 for single filers and $30,000 for married filing jointly (IRS inflation-adjusted).
Calculate Your Take-Home Pay
Enter your salary, state, and deductions — get your exact net pay in under 100ms.
Related Articles
Federal Taxes
What Is FICA Tax? Social Security and Medicare Explained
FICA taxes fund Social Security and Medicare. At 7.65% flat (matched by your employer), they apply to almost all earned income.
Read articleFederal Taxes
How Tax Brackets Work in the US
Tax brackets are widely misunderstood. Only the income within each bracket is taxed at that rate — not your entire salary.
Read articleGet Salary & Tax Tips
Weekly insights on pay, taxes, and maximizing your take-home.