Understanding Your Pay Stub: Every Line Explained

How a pay stub is organized

Most pay stubs are built in the same order even if the labels differ by payroll system. You usually see employee and employer details first, then the pay period start and end dates, the check date, and sometimes the check number or direct deposit reference. After that come earnings, taxes, deductions, employer-paid benefits, and net pay. If you understand that sequence, the document becomes much easier to read.

The earnings section shows how you were paid. Hourly employees may see regular hours, overtime hours, shift differentials, holiday pay, bonuses, commissions, or paid time off on separate lines. Salaried employees usually have fewer earnings codes, but bonuses, retro pay, and reimbursements may still appear independently. Do not assume every line is taxable in the same way.

The bottom or side column often shows current-period values and year-to-date values next to each other. Current period means this paycheck only. Year to date means the running total since January 1 or since the start of the payroll year. That YTD column is what helps you catch cumulative issues.

Gross pay vs. net pay

Gross pay is the full amount you earned before deductions. It includes regular wages or salary plus overtime, bonuses, commissions, and in some cases paid leave. Gross pay is not the same as taxable wages, because certain benefits and retirement contributions may reduce the wages used for tax calculations even though the money was part of your compensation.

Net pay is what remains after taxes and deductions are taken out. This is your take-home pay, whether it is deposited into one account, split across several accounts, or issued by check. If your paycheck feels unexpectedly small, the gap between gross and net is where the explanation lives: payroll taxes, income tax withholding, retirement contributions, health coverage, wage garnishments, and other deductions all show up there.

Bonus checks often surprise people because supplemental wages can be withheld differently from regular wages. The bonus may still be correct even if the deposit looks smaller than expected, so always compare the earnings line and withholding lines before assuming the payment was short.

FICA, federal withholding, and state withholding

FICA stands for Federal Insurance Contributions Act and covers Social Security and Medicare payroll taxes. On most pay stubs, Social Security is withheld at 6.2 percent of eligible wages up to the annual wage base, and Medicare is withheld at 1.45 percent of eligible wages with an additional Medicare amount possible for higher earners. Your employer also pays its own matching share, but that portion is not taken from your paycheck.

Federal income tax withholding is separate from FICA. That amount is based on your wages, pay frequency, and the information on your W-4, including filing status and any extra withholding. State income tax withholding depends on where you work and live. Some states have no income tax, some have flat rates, and others use their own withholding forms or progressive brackets.

If a tax line suddenly jumps or disappears, compare the pay stub against a recent prior check. Major changes usually trace back to a W-4 update, a location change, a payroll correction, or hitting a tax limit, and you want to know which one caused it.

How 401(k) and benefit deductions change your check

Retirement deductions are one of the biggest reasons taxable wages differ from gross wages. A traditional 401(k) contribution generally reduces federal taxable wages, while a Roth 401(k) contribution does not reduce federal income tax withholding even though it still lowers your net pay. On some stubs, both plans appear with separate deduction codes, so read the label instead of assuming all retirement lines work the same way.

Health insurance premiums, dental and vision coverage, health savings account contributions, flexible spending account elections, commuter benefits, union dues, and wage garnishments can all appear in the deductions section. Some are pre-tax, some are post-tax, and some may only reduce certain taxes. That is why two employees with the same salary can receive very different net pay.

When open enrollment changes take effect, check the first affected paycheck carefully. New medical premiums, a newly elected HSA, or a changed retirement percentage should match the choices you made. If a deduction is wrong, payroll can usually fix it faster when you catch it on the first paycheck rather than three months later.

Why year-to-date totals matter more than one paycheck

Year-to-date totals show the cumulative story. Instead of asking whether one paycheck looks odd in isolation, you can see how much you have earned, contributed, and had withheld so far this year. That makes it easier to judge whether tax withholding is on pace, whether you are close to your 401(k) target, and whether employer deductions line up with what you expected across several pay periods.

YTD totals are especially helpful when you receive bonuses, commissions, retro pay, or corrections. A single paycheck may include multiple adjustments that are hard to interpret from one row of numbers. The YTD column shows whether those adjustments are pulling your annual totals in the direction you expected. Later, your W-2 should broadly match those year-end totals for wages and withholding.

If you change jobs midyear, the YTD totals on your final stub from the old employer and your first stubs from the new employer help you reconcile the full year. Keeping those records makes tax filing and benefit troubleshooting much easier if something on the W-2 looks off.

What to verify on every pay stub

You do not need to audit payroll like a forensic accountant every two weeks, but you should scan for the lines most likely to be wrong. A two-minute review can catch missing hours, incorrect overtime, bad tax setup, or deductions that started too early. The more your compensation includes variable pay, the more valuable this habit becomes.

Start by comparing the current pay stub to the previous one and then check the items that changed. If nothing obvious changed in your job or benefits but the check is meaningfully different, there is usually a specific reason on the stub. Your job is to identify it before the issue repeats.

1. Confirm the pay period dates, hours, and pay rate are correct.
2. Check gross pay lines for overtime, bonus, commission, or PTO accuracy.
3. Review tax withholding lines for sudden jumps, missing state tax, or a new locality code.
4. Verify deductions for 401(k), medical coverage, HSA, FSA, and other elected benefits.
5. Compare YTD totals against your annual goals, prior stubs, and expected W-2 trajectory.

Escalate errors quickly. Payroll teams can usually correct issues, but missing documentation and delayed reporting make fixes harder the longer a bad setup stays in place.

Common pay stub red flags

Raises, promotions, and location changes are classic times for payroll mistakes. If your pay rate changed recently, confirm that both the rate and the effective date on the pay stub match what you were told. The same applies when you move states, change departments, or switch from hourly to salary. A payroll system may update one field before another, which can create odd withholding or benefit deductions for a pay period or two.

Benefits are another high-risk area. Watch for medical deductions starting before your coverage should be active, deductions continuing after you waived a benefit, or a retirement percentage being applied to a bonus when you expected a different election. None of these problems are impossible to fix, but they are much easier to correct while records are fresh and the adjustment only affects one or two checks instead of an entire quarter.

Near year-end, compare YTD wages, taxes, and retirement contributions against your own records. If the W-2 later looks different from the last pay stub, those earlier comparisons give you a paper trail. The best habit is simple: review each pay stub while the pay period is still recent enough that hours worked, benefits elections, and tax changes are easy to verify from memory.

Frequently Asked Questions