Pay Stub Explained
A pay stub is usually less mysterious when you understand what each deduction line represents and how gross pay becomes net pay. This guide walks through the parts most people should check first, the words that create confusion, and the moments when it makes sense to ask for professional help.
This guide is general educational information, not professional advice. If the document involves a serious deadline, lawsuit, tax issue, health decision, or major financial consequence, get qualified help.
What this document usually means
A pay stub is the detailed breakdown of your paycheck showing how your gross pay was calculated, what was deducted, and the net amount deposited or paid to you. Every employer is required to provide this information, though the format varies.
The stub typically shows earnings by type, such as regular hours, overtime, bonuses, and commissions. Below that are deductions, including federal and state taxes, Social Security and Medicare taxes, health insurance premiums, retirement contributions, and any other withholdings.
The bottom line is your net pay, which is the amount that actually reaches your bank account. Year-to-date totals help you track how much you have earned and paid in taxes so far during the calendar year.
The first things to check
Verify your gross pay matches the hours you worked or your expected salary for the pay period. If you worked overtime, check that the hours are correct and the rate is at least one and a half times your regular rate.
Review each deduction line. Tax withholdings should roughly align with the W-4 elections you filed. Benefits deductions like health insurance and retirement contributions should match the amounts you enrolled for during open enrollment.
Check the year-to-date totals periodically to ensure nothing looks off. A sudden change in withholding or a new deduction you did not authorize deserves investigation.
Common reasons this letter feels confusing
Pay stubs use abbreviations that vary by payroll system. OASDI means Social Security tax, FICA combines Social Security and Medicare, and FIT means federal income tax. Without a legend, these codes are hard to decipher.
Pre-tax versus post-tax deductions add another layer. Pre-tax deductions like health insurance premiums reduce your taxable income, while post-tax deductions like Roth 401(k) contributions do not. The order in which deductions are applied affects the tax math.
People are often surprised by the gap between gross and net pay, especially in their first job. Understanding that roughly a quarter to a third of gross pay goes to taxes and benefits deductions helps set expectations.
What to do before you pay or respond
If a deduction looks wrong, compare it to your benefits enrollment documents or your most recent W-4. If the discrepancy is with tax withholding, you can submit a new W-4 to adjust future paychecks.
If you notice unauthorized deductions, contact your payroll department immediately. Employers generally cannot deduct amounts from your pay without your written consent, with limited exceptions.
Save your pay stubs, especially the final one of each year. The year-to-date totals should match your W-2 form, and having the stubs makes it easier to catch errors.
How Letter Lens can help
Letter Lens is built for moments like this. Upload a photo or PDF of your pay stub, and it can turn the dense wording into a plain-English summary with earnings, deductions, taxes, and jargon decoded. It is not a replacement for an HR professional or tax advisor, but it can help you understand the document before you decide what to do next.
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