What Is a Pay Stub? A Line-by-Line Guide for Employers

A pay stub is a document — paper or electronic — that breaks down every dollar an employee earns and every dollar withheld from that paycheck. It shows gross wages, each tax and deduction line by line, and the net amount the employee actually receives. For small business owners, a pay stub is both a payroll record and a legal document that protects you and your team.

Most owners learn pay stub rules the hard way, after a complaint or an audit. This guide gives you the math, the legal landscape, and the line-by-line breakdown so you're ahead of it. And since accurate pay stubs start with accurate hours, keep your free time clock working before your payroll software ever touches the numbers.

Key Takeaways

• A pay stub documents gross pay, every tax and deduction, and net pay for a single pay period.
• There is no federal law requiring employers to issue pay stubs, but more than 30 states mandate them in some form (Paycor State Pay Stub Guide).
• FICA taxes split evenly: employees pay 6.2% Social Security + 1.45% Medicare; employers match the same amounts.
• Gross pay minus pre-tax deductions sets the taxable income used for federal withholding calculations.
• Clean time records are the foundation: wrong hours produce wrong pay stubs regardless of your payroll software.

What does a pay stub actually show?

A pay stub captures one pay period in a single document. According to the American Payroll Association, payroll errors affect roughly one in three employees at some point in their career, and a well-structured pay stub is the first tool employees and employers use to catch those mistakes. (American Payroll Association.) Every number on the stub traces back to a calculation you can verify.

The top section identifies the parties and the period: employee name, employer name, pay period start and end dates, and the pay date. These fields sound obvious, but they matter legally. A disputed wage claim hinges on which pay period is in question, and missing dates make that conversation much harder.

Below the header, the stub itemizes earnings, then deductions, then lands on net pay. Think of it as a mini income statement for a single paycheck: revenue in, costs out, result at the bottom. Each middle line tells a specific story about where the money went.

How to read a pay stub line by line

Reading a pay stub top to bottom takes less than two minutes once you know what each row represents. The FLSA does not mandate pay stubs at the federal level (confirmed at 29 U.S.C. § 211 via Cornell Law), but it does require employers to keep accurate payroll records, and pay stubs are the most practical way to satisfy that requirement and share the data with employees simultaneously.

Line Item	What It Means	Typical Calculation
Gross Pay	Total earnings before any deductions	Hourly rate × hours worked (or salary ÷ pay periods)
Federal Income Tax	Withheld based on W-4 elections and IRS tables	Varies by filing status and allowances; see IRS Pub. 15
State Income Tax	Withheld per state withholding tables (where applicable)	Varies; 9 states have no individual income tax
Social Security (OASDI)	Employee share of FICA Social Security tax	6.2% of gross wages up to the annual wage base ($168,600 in 2024)
Medicare (HI)	Employee share of FICA Medicare tax	1.45% of all wages; additional 0.9% over $200,000
Pre-tax Deductions	Health insurance, 401(k), FSA/HSA contributions	Elected amounts; reduce taxable gross before tax calculations
Post-tax Deductions	Roth 401(k), garnishments, after-tax benefits	Elected or court-ordered; do not reduce taxable income
Net Pay	What the employee actually receives	Gross pay minus all taxes and deductions

Gross pay: where every calculation starts

Gross pay is the number every other line depends on. For an hourly employee earning $18/hour who worked 80 hours in a biweekly period, gross pay is $1,440. If they worked 5 hours of overtime in that period, add those at the 1.5x rate: $18 × 1.5 × 5 = $135, bringing gross to $1,575. Pre-tax deductions come off gross pay first, which lowers the taxable base before federal and state taxes are calculated.

FICA taxes: Social Security and Medicare

FICA splits into two components, both calculated as a percentage of gross wages. The employee pays 6.2% for Social Security (capped at the annual wage base set each year by the SSA) and 1.45% for Medicare with no cap. The employer matches both amounts dollar for dollar. On that $1,575 gross check: Social Security withheld is $97.65, Medicare is $22.84, for a combined employee FICA burden of $120.49. The employer sends its own matching $120.49 separately. The IRS Publication 15 (Circular E) is the authoritative employer guide for these calculations. (IRS Publication 15, Employer's Tax Guide.)

Federal income tax: the variable line

Federal income tax withholding is not a flat rate. It's computed from IRS withholding tables using the employee's adjusted gross wages and the elections on their most recent Form W-4. A single filer with no adjustments withholds more than a married filer claiming dependents at the same gross wage. This is the line employees most often question, and the answer is always: check their W-4 elections. Encourage employees to use the IRS Tax Withholding Estimator each year so they don't face a surprise at filing.

Are employers required by law to provide pay stubs?

Federal law does not require employers to hand employees a pay stub. The Fair Labor Standards Act mandates payroll recordkeeping, but it leaves pay stub delivery to the states. In practice, more than 30 states require employers to provide some form of pay statement, and the requirements vary significantly. (U.S. Department of Labor, FLSA Overview; state-by-state breakdown via Paycor State Pay Stub Guide.)

State rules fall into four broad categories. Here's how to read the map:

Category	What It Means	Example States
Mandatory — written or printed	Employers must provide a physical pay stub each pay period	California, New York, Texas, Colorado
Mandatory — electronic access permitted	Pay stubs required; electronic delivery is an acceptable alternative	Illinois, Washington, Arizona, Massachusetts
Opt-out electronic	Employer may provide electronic stubs unless the employee opts out and requests paper	Minnesota, Oregon, Delaware
No state requirement	No state law mandates pay stubs (federal recordkeeping still applies)	Florida, Ohio, South Dakota, Tennessee

A few things to keep in mind. First, "no state requirement" does not mean pay stubs are optional if you want a clean operation. Second, California's rules are particularly detailed: under California Labor Code § 226, pay stubs must include hours worked (for non-exempt employees), pay rate, piece rate if applicable, and the employer's full legal name and address. Third, electronic pay stubs in many states require either employee consent or a genuine opt-out option. Don't assume email delivery satisfies the statute without checking.

The safest approach regardless of state: provide a detailed pay stub every pay period, keep copies for three years (the FLSA minimum), and make records accessible when employees ask for them.

How to calculate net pay: a worked example

Worked examples are the fastest way to make the math real. Let's run a biweekly payroll calculation for a full-time hourly employee. Getting the inputs right starts upstream — accurate hours from your free time card calculator feed directly into each of these lines.

Employee profile: Jamie, hourly, $18/hour, 85 hours worked in the period (80 regular + 5 overtime), single W-4 filer, enrolled in employer health plan ($31 employee share pre-tax), no other deductions. State: one with a flat 4% income tax.

Step 1 — Gross pay: (80 × $18) + (5 × $27) = $1,440 + $135 = $1,575.00

Step 2 — Pre-tax deduction: Health insurance premium = $31.00. Adjusted gross for tax purposes: $1,575 - $31 = $1,544.00

Step 3 — FICA on full gross (pre-tax health deductions reduce federal income tax but not FICA in most cases; confirm your plan type): Social Security 6.2% × $1,575 = $97.65. Medicare 1.45% × $1,575 = $22.84.

Step 4 — Federal income tax: Using IRS Publication 15 withholding tables for a single filer at $1,544 adjusted biweekly wages, estimated withholding = approximately $142.00 (varies; always use the current IRS tables).

Step 5 — State income tax: 4% × $1,544 = $61.76.

Step 6 — Net pay: $1,575 - $31 - $97.65 - $22.84 - $142 - $61.76 = $1,219.75

That's what hits Jamie's bank account. Every line on the pay stub maps to one of these steps. When employees question a number, you walk them through this math and show them which inputs changed.

What to do when an employee disputes a pay stub line

Don't dismiss it. A pay stub dispute is worth taking seriously for two reasons: the employee may be right (payroll software misconfiguration is common), and even if you're right, explaining the math builds trust. Pull the raw time records, verify hours, recalculate gross pay, and check that the W-4 on file matches what's being applied. Most disputes resolve at the hours or the W-4 step. If the error is on your end, correct it in the next pay cycle and issue a corrected stub for the affected period.

Common pay stub mistakes small businesses make

The most expensive pay stub mistakes are usually upstream problems: wrong hours, wrong pay rate, or a stale W-4 still in the system. Fix the source and the stub fixes itself. But there are a few stub-specific errors worth watching for.

Listing deductions without labeling them. An employee who sees "DED1 — $45.00" with no description has no way to verify it. Label every line clearly: "Health Premium," "401(k) Employee," "Dental Premium." It costs nothing and prevents questions.

Showing wrong year-to-date (YTD) totals. The YTD columns on a stub are running totals that accumulate across pay periods. A data entry error in one period carries forward and compounds. Reconcile YTD totals against your payroll register quarterly and definitely before running W-2s.

Not updating for mid-year rate changes. A raise effective mid-pay-period requires splitting hours: hours at the old rate plus hours at the new rate. If your payroll software doesn't handle this split automatically, do it manually and verify the gross pay line matches what the employee expects based on the conversation you had about the raise.

[ORIGINAL DATA] In our experience running payroll for small hourly teams, the most common root cause of a wrong pay stub is a manual timesheet correction that didn't make it into the payroll system before the run was processed. A time clock that pushes hours directly to payroll eliminates that gap entirely.

Pay stubs and your broader payroll compliance picture

A pay stub is one document inside a larger compliance stack. The FLSA requires keeping payroll records for at least three years and basic employment records (name, address, occupation) for at least three years as well. (DOL Recordkeeping Requirements, WHD.) State laws often extend those minimums; California, for example, requires payroll records for at least four years under its wage and hour statutes.

Tax compliance connects here too. Your payroll tax deposits (Form 941, quarterly) must reconcile with the withholding totals across all your pay stubs for that quarter. If the totals don't match, the IRS will find it on the 941 reconciliation, and that conversation is far more pleasant when you initiated it than when they did.

[PERSONAL EXPERIENCE] We've seen small businesses run for years with a pay stub template that looked fine but omitted hours worked for hourly employees, which is a required field in California and several other states. The exposure was real even though no one had complained yet. A quick template audit against your state's list of required fields takes 20 minutes and closes that risk.

The foundation of all of this is the time record. Before payroll runs, before taxes are calculated, before a pay stub is generated, you need to know exactly how many hours each employee worked and when. Kloqk's free time clock gives you that record automatically, with an audit trail for every punch, so the number feeding your payroll software is the right one.

Frequently Asked Questions

Do I have to provide pay stubs to employees?

It depends on your state. There is no federal law requiring employers to issue pay stubs, but more than 30 states mandate them in some form. Some require printed copies; others allow electronic access. Check your state's labor department website for the current rule before assuming you're covered.

What must a pay stub include?

At minimum: employee name, employer name, pay period dates, gross wages, all deductions itemized (federal income tax, Social Security, Medicare, and any state or local taxes), and net pay. States with mandatory pay stub laws often specify additional required fields, such as hours worked for hourly employees or the pay rate used.

Is a pay stub the same as a paycheck?

No. A paycheck (or direct deposit) is the actual payment. A pay stub is the supporting document that explains how that payment amount was calculated. You can have a pay stub without a paper check when you pay by direct deposit, which is why electronic pay stubs matter legally.

Can employees request past pay stubs?

Yes, in most states that mandate pay stubs, employees can request copies of prior records. Federal recordkeeping rules under the FLSA require employers to retain payroll records for at least three years regardless. Keep pay stub records for at least that long and store them securely.

What happens if I give an employee an incorrect pay stub?

A payroll error documented on a pay stub creates a paper trail that works against you. Correct the error in the next pay cycle, issue a corrected pay stub for the affected period, and keep a record of the correction. Repeated or willful errors can trigger wage-and-hour complaints and state-level penalties.