Guide 09
How to read your paycheck without guessing
Gross pay vs. net pay
Gross pay is what you earned before anything comes out. Net pay is what remains after taxes, benefit deductions, retirement contributions, and any post-tax items. A raise, bonus, or new deduction can look confusing because every line does not move the same way.
The important habit is not memorizing every payroll term. It is knowing which lines are taxes, which lines are choices you made, and which lines deserve a follow-up with payroll or HR.
The common lines
Federal income tax
Withheld based on pay, filing status, W-4 entries, and payroll rules. It is a prepayment toward your annual federal tax bill.
FICA
Social Security and Medicare taxes. These are separate from federal income tax and are usually shown as their own payroll lines.
State and local tax
Depends on where you live or work. Some places have no state income tax; others add city or county wage taxes.
- Pre-tax deductions: Traditional 401(k), some health insurance premiums, HSA contributions, and similar benefits can reduce taxable income before certain taxes are calculated.
- Post-tax deductions: Roth 401(k), some insurance, garnishments, union dues, or other after-tax items usually come out after tax withholding is calculated.
- Employer-paid benefits: These may appear on a paystub without reducing your take-home pay. They are still valuable because they show compensation your employer is funding.
What to check every few months
Pay rate
Confirm salary, hourly rate, overtime, bonus, or commission is being applied correctly.
Tax setup
Review filing status, extra withholding, and dependent credits after life changes.
Benefits
Make sure retirement, insurance, FSA, or HSA choices match what you selected.
Year-to-date
Use year-to-date totals to see whether contributions and withholding are on pace.
When your paycheck changed
If your take-home pay moved and you do not know why, compare the current paystub to the last normal one. Look for a new deduction, a changed benefit amount, a different pay period, a bonus withholding event, or a tax setup change. Bonuses are often withheld differently from regular pay, so a smaller-than-expected bonus deposit does not always mean the bonus was taxed at your final tax rate.
Sources and research direction: IRS Tax Withholding Estimator and IRS tax withholding guidance.