- Understand what's deducted from your paycheck
- Learn what a W-4 form is and how to fill it out
- Know how to read your pay stub
- Adjust withholding to match your actual tax liability
Why Your Paycheck Is Smaller Than Your Salary
If your salary is $50,000, you won't see $50,000 in your bank account. Your employer withholds (takes out) several things before you get paid.
Common Paycheck Deductions
| Deduction | What It Is | Approximate % |
|---|---|---|
| Federal Income Tax | Based on your W-4 | 10-22% typically |
| Social Security (FICA) | Retirement/disability fund | 6.2% |
| Medicare | Healthcare for seniors | 1.45% |
| State Income Tax | Varies by state | 0-13% |
| 401(k) Contribution | Your retirement savings | Your choice |
| Health Insurance | Your premium share | Varies |
The W-4 Form
When you start a new job, you fill out a W-4 form. This tells your employer how much federal income tax to withhold from each paycheck.
W-4 Key Sections
-
Step 1: Personal information and filing status
Single, Married Filing Jointly, or Head of Household
-
Step 2: Multiple jobs or spouse works
Adjusts for total household income
-
Step 3: Claim dependents
Reduces withholding based on child tax credit eligibility
-
Step 4: Other adjustments
Other income, deductions, extra withholding
Withholding: The Goal
The goal is to have just enough withheld throughout the year so that when you file taxes:
- You don't owe a big bill to the IRS
- You don't get a huge refund (which means you overpaid)
Withholding Scenarios
You had too much withheld. You gave the government a free loan all year.
You had too little withheld. You might face penalties if you owe too much.
Perfect! You used your money all year instead of lending it to the IRS.
A big tax refund isn't a gift - it's your money that you overpaid. If you get a $3,000 refund, that's $250/month you could have had in your paychecks. Many people prefer to adjust their W-4 to get more money each paycheck rather than waiting for a refund.
Reading Your Pay Stub
Your pay stub shows exactly what was deducted. Here's what to look for:
Pay Stub Components
- Gross Pay: Your total earnings before anything is taken out
- Pre-Tax Deductions: 401(k), health insurance - reduce taxable income
- Taxes: Federal, state, Social Security, Medicare
- Post-Tax Deductions: Roth 401(k), union dues, etc.
- Net Pay: What actually hits your bank account
- YTD (Year to Date): Running totals for the year
When to Update Your W-4
You can update your W-4 anytime by submitting a new form to your employer. Do this when:
- You get married or divorced
- You have a baby or adopt a child
- You get a second job or side income
- Your spouse starts or stops working
- You owed a lot or got a big refund last year
- You buy a house (mortgage interest deduction)
Using the IRS Withholding Estimator
Not sure if your withholding is right? The IRS has a free tool:
IRS Tax Withholding Estimator
Available at irs.gov/W4App
- Answer questions about your income, filing status, and deductions
- It calculates if you're on track
- Tells you exactly how to adjust your W-4
- Do this at least once a year, especially after big life changes
The W-2 Form
Don't confuse W-4 with W-2:
- W-4: You fill out to set withholding (beginning of year/job)
- W-2: Your employer gives you showing what you earned (end of year)
You use your W-2 to file your tax return. Employers must send W-2s by January 31 each year.