How US Salary Paycheck Deductions Work
When an American worker signs an employment contract for a $75,000 annual salary, the actual amount deposited into their checking account every two weeks is noticeably lower. This difference represents your payroll withholdings, which consist of federal taxes, state taxes, mandatory federal social insurance programs (FICA), and voluntary pre-tax benefit contributions.
Understanding the exact anatomy of your US paycheck is essential for accurate personal budgeting, tax planning, and optimizing retirement contributions.
Breakdown of Payroll Deductions in the United States
1. Federal Income Tax Withholding
The Internal Revenue Service (IRS) employs a progressive tax system. Income is divided into tax brackets ranging from 10% to 37%. Taxable gross income is calculated after accounting for standard IRS deductions ($15,000 for single filers and $30,000 for married couples in 2026) and pre-tax benefit elections.
2. FICA Taxes (Social Security & Medicare)
FICA is mandatory for all US wage earners under federal law:
- Social Security: Assessed at 6.2% of gross earnings up to the annual wage cap of $176,100 (2026 threshold). Employer matches an additional 6.2%.
- Medicare: Assessed at 1.45% on all earnings with no income cap. An additional 0.9% Medicare surtax applies to high earners (over $200,000 single / $250,000 married).
3. State and Local Income Taxes
State tax obligations vary dramatically across the US map. Nine states (including Texas, Florida, Washington, and Nevada) levy zero tax on wage income. Flat-tax states like Illinois (4.95%) or Pennsylvania (3.07%) apply a uniform percentage, while progressive states like California and New York apply graduated tiers reaching over 10% for upper brackets.
Real-World Example: $75,000 Salary in Texas vs. California
Let's compare a single employee earning a $75,000 gross salary paid bi-weekly (26 pay periods per year) with a 5% pre-tax 401(k) contribution:
• Gross Pay per Period: $2,884.62
• 401(k) Contribution (5%): −$144.23
• FICA Taxes (SS + Medicare): −$220.67
• Federal Income Tax: −$326.92
• Net Pay in Texas (No State Tax): $2,192.15
• Net Pay in California (~$115 State Tax): $2,077.15
Frequently Asked Questions (FAQs)
Federal withholding is determined by converting your pay period salary into an annual equivalent, subtracting standard IRS deductions and pre-tax retirement/health contributions, and applying the progressive IRS tax brackets based on your W-4 filing status.
FICA stands for Federal Insurance Contributions Act. It funds Social Security retirement/disability benefits (6.2%) and Medicare health insurance (1.45%). Employers match these contributions dollar-for-dollar for a total of 15.3% per employee.
Nine states charge no state income tax on earned wages: Alaska, Florida, Nevada, New Hampshire (taxes interest/dividends only), South Dakota, Tennessee, Texas, Washington, and Wyoming.
Traditional 401(k) contributions are deducted pre-tax from your gross salary. Because your taxable income drops, your federal and state tax withholdings decrease, making the net reduction in your take-home pay smaller than the actual amount deposited into your 401(k).
Bi-weekly employees receive 26 paychecks a year (paid every two weeks, resulting in two months with 3 paychecks). Semi-monthly employees receive 24 paychecks a year (paid twice per month, such as on the 1st and 15th).