How to Read a Pay Stub, Line by Line
A line-by-line walkthrough of a pay stub: earnings, FICA, pre-tax deductions, withholding, net pay and YTD, with worked numbers and what each line means.
Most people glance at the bottom line of a pay stub, confirm the money arrived, and file the rest away unread. That is understandable, but it leaves real money unexamined: overtime paid at the wrong rate, a FICA line that does not add up, a 401(k) contribution that never posted, or year-to-date totals that drift from reality. This guide walks through a pay stub the way a payroll professional reads it, block by block, using one worked example throughout: a worker earning $25 an hour with 80 regular hours and 5 overtime hours in the period. One honest note before we start. Official stubs are issued by your employer or payroll provider; the guide teaches you to read and verify them, and a self-built estimate is a tool for checking your pay and keeping personal records, not a document to hand to anyone else. Creating or using false income documents is fraud.
CHAPTER 01The Header: Names, Dates, and the Pay Period
Start at the top, because the header answers three questions every other section depends on: who was paid, for which period, and on what date. A complete header shows the employer name and address, the employee name, the pay period start and end dates, and the pay date. Check the period dates against your calendar: a stub labeled bi-weekly should cover a two-week span, while a semi-monthly stub typically ends on the 15th or the last day of the month. If the period dates are wrong, everything downstream is describing wages you did not earn in that window.
The pay date deserves its own glance, not the period end date. Payroll often runs on a lag: the check dated the 5th may cover the two weeks that ended on the 20th of the previous month. That lag explains a common January surprise, where a check arrives after the new year for work performed in December, and it affects which year the wages show up on your W-2. When you compare a stub against a bank deposit, match the pay date, not the period.
Names matter more than they look. A stub showing a nickname, a misspelled name, or an outdated address can cause friction later, especially when an employer-issued stub is used for a lease application, a loan file, or a benefits enrollment where records must match. Ask payroll to correct header errors promptly; corrections are routine and far easier to make the week the stub is issued than months later during verification season.
CHAPTER 02Earnings: Where Gross Pay Comes From
The earnings block lists every kind of pay before any deduction, and it is the block most worth auditing. Regular pay should equal your hourly rate multiplied by your regular hours. Overtime, for most hourly employees, should appear as its own line at one and a half times your rate. In the worked example, 80 regular hours at $25 produces $2,000.00, and 5 overtime hours at $37.50 produces $187.50, for a gross of $2,187.50. If a stub lumps overtime into regular pay at the flat rate, the employee is quietly losing money every period.
Other lines that may appear here include shift differentials, bonuses, commissions, holiday pay, and paid time off drawn from an accrued balance. Each line should name its basis: a bonus line is fine as a flat amount, but a differential should show its own rate or hours. Paid time off deserves attention during job changes, because unused balances that print on stubs are the record you rely on when a final check is calculated.
The number to carry forward is gross pay for the period, $2,187.50 in the example. Every deduction below is expressed against this figure, and the order in which they apply is not arbitrary. Statutory taxes such as FICA are computed on the full gross, while certain pre-tax deductions are subtracted only for income-tax purposes. If you want to check a payroll figure against your own expectation, an estimate built from your actual rate and hours gives you a baseline to compare, which is exactly what a record-keeping stub estimator is for.
CHAPTER 03FICA: The Social Security and Medicare Lines
FICA stands for the Federal Insurance Contributions Act, and it is the pair of lines almost every stub carries: Social Security at 6.2 percent and Medicare at 1.45 percent, a combined 7.65 percent of gross wages. These percentages are flat, which makes them the easiest lines to verify. On the example gross of $2,187.50, Social Security is $135.63 and Medicare is $31.72, for a combined $167.34. If your stub shows a FICA total far from 7.65 percent of gross, something is worth a question to payroll.
Two structural details live inside these lines. First, Social Security applies only up to an annual wage base, which is $184,500 for 2026; once your year-to-date gross crosses that threshold, the 6.2 percent line drops to zero for the rest of the year, while Medicare continues without a cap. Second, and less obvious, FICA is computed on your full gross before any 401(k) deferral. A traditional 401(k) defers federal and state income tax, but it does not defer FICA, so the 7.65 percent line ignores your retirement contribution entirely.
That FICA-versus-401(k) interaction is the single most common confusion when people check their stubs against a simple mental model. If you computed your retirement deferral as 5 percent of $2,187.50, about $109.38, and then expected FICA to shrink by 7.65 percent of that amount, your prediction will not match the stub, because the stub is correct: FICA never saw the deferral. This is also why an estimate tool that splits the two bases correctly tracks a real payslip, while a naive calculator quietly drifts from it every single period.
CHAPTER 04Pre-Tax Deductions: What Pre-Tax Actually Defers
Below earnings sit your voluntary deductions, and the word pre-tax deserves careful reading. Pre-tax means the amount is subtracted before income tax is calculated, which lowers the wages your income-tax withholding applies to. In the example, a 5 percent traditional 401(k) deferral takes $109.38 out of the check, and the income-tax base becomes gross minus that deferral, about $2,078.13. Health insurance premiums, when offered through a plan that treats them as pre-tax, work similarly as a flat dollar amount per period.
The limit of the phrase is just as important as the benefit. Pre-tax deductions defer federal and state income tax; they do not defer FICA, which is why the Social Security and Medicare lines in the previous section were computed on the full $2,187.50. Some cafeteria-plan insurance premiums are also exempt from FICA under real payroll rules, so an exact match between a simple estimate and a real stub can differ by a small amount on that specific treatment. Treat any such gap as a known simplification rather than a mystery.
One practical habit: confirm the deferral percentage on the stub matches what you elected. Enrollment mistakes and mid-year changes sometimes post a period late, and the error compounds silently because both the dollar amount and the income-tax base shift together. The stub line showing your contribution rate, multiplied by gross, should reproduce the deferral dollar figure; if it does not, a quick note to benefits saves a season of wrong contributions.
CHAPTER 05Income Tax Withholding: The W-4 Lines
Federal income tax withholding is the line people find least predictable, and the reason is that it is driven by your Form W-4 rather than by a flat percentage of pay. Your filing status, dependents, other income, and any extra amount you request all feed an IRS withholding formula, and employers apply it each period. Unlike FICA, it is not a fixed share of gross, and unlike FICA it is reconciled later on your tax return, where too little withheld becomes a balance due and too much becomes a refund.
The honest way to think about this line on any estimate is as a rough placeholder. Simple tools often apply one percentage to taxable wages based on a broad income band, and the honest ones label that tier as an estimate rather than as tax tables. Federal brackets are progressive, and the effective rate that fits a real W-4 can land well away from a flat approximation, especially mid-year or with multiple income sources. If your goal is a trustworthy net figure, tune the percentage until the estimate matches a recent employer-issued stub, then watch it as hours change.
State income tax, where it exists, behaves like a smaller version of the federal line, and some cities and counties add their own. A state line of zero on a stub from a state without income tax is correct; a state line of zero on a stub from a state with one is a payroll error. These local lines matter most when you move mid-year, when the old state should stop and the new one begin, and when two states share a border and your employer's records need updating.
CHAPTER 06Net Pay and YTD: The Two Numbers to Check
Net pay is gross minus every deduction above it, and it is the number that should match your deposit to the cent. In the worked example, $2,187.50 gross, minus the $109.38 deferral, minus $167.34 FICA, minus a 12 percent rough-tier withholding on the $2,078.13 income-tax base of about $249.38, leaves roughly $1,661.41. That is about 76 percent of gross, a plausible share for a single worker with modest deductions. If your deposit and your stub disagree, the stub's math is the thing to audit, and the discrepancy usually traces to a deduction you forgot you elected.
Alongside each per-period figure, stubs repeat every number as a year-to-date total, which is the running sum since January 1. YTD answers different questions: how much have I actually earned this year, has my Social Security line stopped because I passed the wage base, and how much have I really contributed to my 401(k)? YTD is also where drift accumulates, so a small per-period error becomes obvious when twelve periods are summed. A YTD gross that has not moved in two pay periods is a classic sign of a processing problem.
Reading a stub becomes fast with practice: header for context, earnings for the top line, FICA as the fixed floor of taxes, pre-tax deductions for the income-tax base, withholding as the W-4-driven variable, then net and YTD as the two numbers to verify. If you want a baseline before the real stub arrives, the free pay stub generator on Toolfyra builds this same breakdown from your own rate, hours and deductions, clearly labeled as an estimate for personal records, and the general paycheck calculator handles full bracket-style scenarios.
🔑 Key takeaways
- Read the header first: employer, employee, period dates and pay date establish which wages the stub describes.
- Gross pay is the anchor; overtime should appear as its own line at 1.5 times your regular rate.
- FICA is 7.65 percent of full gross (6.2 percent Social Security capped at the $184,500 2026 wage base, plus 1.45 percent Medicare) and ignores 401(k) deferrals.
- Pre-tax means pre-income-tax: a traditional 401(k) lowers the withholding base, not FICA.
- Federal withholding is W-4-driven and progressive, so any flat percentage used in an estimate is a placeholder to tune against a real stub.
- Verify two numbers every period: net pay against your deposit, and YTD totals against last period's stub.
❓ Frequently asked questions
Is net pay supposed to match my bank deposit exactly?
Yes. Net pay on an employer-issued stub is the exact amount transferred. If the deposit differs, look for a garnishment, a union dues change, or a bank fee, and ask payroll if nothing explains it.
Why did my Social Security tax stop mid-year?
Social Security tax applies only up to the annual wage base, $184,500 for 2026. Once your year-to-date gross passes it, the 6.2 percent line drops to zero, and your checks grow slightly larger until January resets it.
Does my 401(k) contribution reduce Social Security tax?
No. A traditional 401(k) defers federal and state income tax, but FICA is computed on your full gross before the deferral. Your retirement contribution shrinks the income-tax withholding base only.
What is the difference between the pay period and the pay date?
The pay period is the span of work being paid; the pay date is when the money arrives. Payroll usually runs on a lag of days to weeks, which is why a January check can cover December work.
Are employer-paid benefits supposed to appear on my stub?
Many stubs list employer-paid items such as health premiums or retirement matches in a separate block. They are not deducted from you, but showing them documents the full value of your compensation.
Can I use a self-built estimate as a pay stub?
No. An estimate is for checking your pay and keeping personal records. Official stubs come from your employer or payroll provider, and presenting a self-made stub as an issued document is fraud, not a shortcut.
How can I predict my next check before payroll runs it?
Rebuild the same arithmetic from your own inputs: rate times hours, overtime at 1.5 times, then FICA at 7.65 percent of gross, pre-tax deductions, and a withholding estimate tuned to match a recent stub.
The free Pay Stub Generator on Toolfyra runs everything in your browser — no signup, nothing uploaded.
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