MGU Business and Finance Series — Personal Finance
Part IV: Personal Finance and Financial Systems
Gross Pay · Net Pay · Withholding · Payroll Taxes · Deductions · Benefits
Chapter 13 of 14
MGU Business and Finance Series · Personal Finance · Library Textbook Edition
Chapter 13:
Taxes, Paychecks,
and Withholding
Gross pay, net pay, income tax withholding, payroll taxes, Social Security, Medicare, pre-tax and post-tax deductions, and how to read any pay stub accurately
■ Finance Level: Personal Finance ■
■ 10 Sections • Chapter 13 of 14 ■
Follows Chapter 12: Banking and Credit · Prepares students for Chapter 14: Filing Taxes
Chapter 13 — Front Matter
Purpose and Overview
This chapter introduces taxes through the one document that almost every working person encounters before any other tax form: the paycheck. Before students learn to file taxes, prepare tax returns, or understand the full tax code, they need to understand why money disappears between what an employer pays and what arrives in a bank account. This chapter explains that gap — every line of it — so that any student who picks up a pay stub can read it completely and verify it accurately.
By the end of this chapter, you should be able to calculate gross pay for hourly and salaried workers, identify every major deduction category on a pay stub, explain the difference between income taxes and payroll taxes, calculate Social Security and Medicare withholding, and distinguish pre-tax from post-tax deductions. These skills carry directly into Chapter 14, where the tax return reconciles what was withheld with what is actually owed.
Opening Question
A job offer says you will earn $22 per hour. After your first paycheck, you notice the deposit is noticeably smaller than you expected. Where did the money go? Is something wrong? By the end of this chapter, you will be able to answer that question for any paycheck — and verify that every number on your pay stub is exactly what it should be.
10Sections
12Objectives
30+Key Terms
12+Worked Examples
Learning Objectives
- 1Explain why taxes and deductions appear on paychecks and what each category funds.
- 2Define gross pay and net pay and describe the relationship between them.
- 3Calculate gross pay for hourly workers, including overtime at 1.5× the regular rate.
- 4Calculate gross pay per period for salaried workers on any pay schedule.
- 5Identify and explain every major section of a pay stub.
- 6Explain income tax withholding and how it relates to Form W-4 and the annual tax return.
- 7Calculate Social Security (6.2%) and Medicare (1.45%) withholding from gross pay.
- 8Describe Social Security and Medicare as programs and explain what payroll taxes fund.
- 9Define pre-tax deduction and explain how it reduces taxable income and income tax withholding.
- 10Define post-tax deduction and identify common examples.
- 11Explain how employer-paid benefits affect total compensation beyond wages.
- 12Review a pay stub systematically and identify common payroll errors.
Chapter 13 — Contents
Sections at a Glance
- 13.1Why Taxes Appear on PaychecksFederal income tax withholding; state income tax; payroll taxes; pre-tax and post-tax deductions; key insight on advance collection
- 13.2Gross Pay and Net PayDefining gross and net; hourly pay calculations; overtime at 1.5×; salaried pay by period; why the gap matters
- 13.3Pay StubsAnatomy of a pay stub; annotated sample; earnings section; deductions section; year-to-date totals; why to review every period
- 13.4Income Tax WithholdingWithholding as prepayment; Form W-4; filing status; refund vs. balance due; federal vs. state withholding
- 13.5Payroll TaxesSocial Security at 6.2%; Medicare at 1.45%; employer matching; self-employed workers; why payroll taxes differ from income taxes
- 13.6Social Security and Medicare at an Introductory LevelSocial Security credits and benefits; retirement, disability, survivors; Medicare Parts A–D; the three-legged stool of retirement
- 13.7Pre-Tax DeductionsSection 125 cafeteria plans; health insurance; FSA; HSA; 401(k); how pre-tax reduces taxable wage; worked tax savings example
- 13.8Post-Tax DeductionsRoth 401(k); supplemental life insurance; disability premiums; wage garnishments; union dues; pre-tax vs. post-tax decision
- 13.9Benefits and Take-Home PayEmployer-paid benefits invisible on stubs; 401(k) matching; total compensation comparison; open enrollment decisions; risk management
- 13.10Reading a Paycheck CarefullyEight-step review process; full stub worked example; common error table; what to do when errors are found
Sections 13.1 – 13.2
The Gap Between Gross and Net
Why Taxes Appear on Paychecks · Gross Pay · Net Pay · Overtime · Pay Schedules
Section 13.1
Why Taxes Appear on Paychecks
Most people encounter taxes for the first time not in a government office and not in tax preparation software — but in a paycheck. They work a job, expect to be paid, and discover that the deposit is noticeably smaller than what the employer said they would earn. The gap between those two numbers is not a mistake. It is the result of several taxes and deductions that federal law, state law, and sometimes local law require employers to collect on behalf of their employees.
Understanding this is one of the most practically important lessons in personal finance. The paycheck is where most financial plans begin. A person who cannot read their pay stub cannot accurately estimate spendable income, cannot build a reliable budget, and cannot catch errors in withholding — which happen more often than most people realize.
| Category | What It Is | Example |
|---|
| Federal Income Tax Withholding | Advance payment toward annual federal income tax obligation; not the final calculation | $168 withheld per period |
| State Income Tax Withholding | Advance payment toward state income tax; not applicable in states with no income tax | $75 withheld per period |
| Payroll Taxes | Fund Social Security and Medicare specifically; calculated as fixed percentages of wages | 6.2% Social Security + 1.45% Medicare |
| Pre-Tax Deductions | Subtracted before income tax is calculated; reduce taxable income | Health insurance premium, 401(k) contribution |
| Post-Tax Deductions | Subtracted after income tax is calculated; do not reduce taxable income | Supplemental life insurance, Roth 401(k) |
Key Insight
Taxes on paychecks are not punishments or surprises for workers who understand the system. They are advance collections of obligations the worker already has. The tax return filed later in the year reconciles those advance payments against the actual amount owed.
- In your own words, explain the difference between income tax withholding and payroll taxes. What does each fund?
- A friend says the money missing from their paycheck is "just the government taking it." What is a more accurate way to describe withholding?
- Name two pre-tax deductions and two post-tax deductions. Explain how their placement in the paycheck calculation differs.
Section 13.2
Gross Pay and Net Pay
Core Formula
Net Pay = Gross Pay − All Taxes − All Deductions
Gross Pay — total compensation earned before any deductions
Net Pay (Take-Home Pay) — the amount actually received; the number that drives financial planning
Calculating Gross Pay for Hourly Workers
Example 13.2a
Hourly gross pay — no overtime
- ProblemMarcus earns $18.50 per hour and works 40 hours in a week.
- Formula
Gross Pay = Hourly Rate × Hours Worked
- Solve
$18.50 × 40 = $740.00
Gross Pay: $740.00
Overtime Rule
Federal law (the Fair Labor Standards Act) requires at least 1.5× the regular hourly rate for hours worked beyond 40 in a workweek. Some states have stricter rules. Always verify your employer's overtime policy and applicable state law.
Example 13.2b
Hourly gross pay — with overtime
- ProblemMarcus works 46 hours. Overtime rate is 1.5× regular rate.
- Regular
40 × $18.50 = $740.00
- Overtime
6 × ($18.50 × 1.5) = 6 × $27.75 = $166.50
- Solve
$740.00 + $166.50 = $906.50
Gross Pay with Overtime: $906.50
Calculating Gross Pay for Salaried Workers
| Pay Schedule | Pay Periods Per Year |
|---|
| Weekly | 52 |
| Biweekly (every two weeks) | 26 |
| Semimonthly (twice per month) | 24 |
| Monthly | 12 |
Example 13.2c
Salaried gross pay per period — biweekly
- ProblemPriya earns $52,000 annually, paid biweekly (26 periods per year).
- Formula
Gross Pay Per Period = Annual Salary ÷ Pay Periods Per Year
- Solve
$52,000 ÷ 26 = $2,000.00
Gross Pay Per Period: $2,000.00
Example 13.2d
Salaried gross pay per period — semimonthly
- ProblemDarnell earns $39,000 annually, paid semimonthly (24 periods per year).
- Solve
$39,000 ÷ 24 = $1,625.00
Gross Pay Per Period: $1,625.00
Student Warning — Planning with the Wrong Number
The gap between gross and net pay can be 20–25% or more. A worker who budgets based on gross pay will consistently overestimate available money. Always plan with net pay — the actual amount deposited.
- Hourly rate: $16.00; hours: 40. Find gross pay.
- Hourly rate: $21.50; hours: 48 (overtime at 1.5×). Find gross pay.
- Annual salary: $46,800; biweekly pay. Find gross pay per period.
- Annual salary: $60,000; semimonthly pay. Find gross pay per period.
- Hourly rate: $13.75; 45 hours worked. Overtime at 1.5×. Find gross pay.
- Annual salary: $84,500; weekly pay. Find gross pay per period.
Sections 13.3 – 13.4
The Pay Stub and Income Tax Withholding
Anatomy of a Pay Stub · Annotated Sample · Form W-4 · Refund vs. Balance Due
Section 13.3
Pay Stubs
A pay stub (also called a paycheck stub or earnings statement) is the document that accompanies each paycheck and explains how gross pay was calculated and how deductions reduced it to net pay. Pay stubs vary in format between employers but contain the same essential information. Review your pay stub every pay period — errors in payroll systems happen, and the worker who catches them promptly avoids compounding problems.
Annotated Sample Pay Stub — Jordan Reyes
Employee: Jordan Reyes
Employee ID: 47821
Department: Customer Operations
Pay Schedule: Semimonthly
Earnings
| Type | Hours | Rate | Amount |
|---|
| Regular | 80 | $22.00 | $1,760.00 |
| Overtime | 4 | $33.00 | $132.00 |
| Gross Pay | | | $1,892.00 |
Deductions
| Description | This Period | Year to Date |
|---|
| Federal Income Tax | $168.44 | $336.88 |
| State Income Tax | $75.68 | $151.36 |
| Social Security (6.2%) | $117.30 | $234.60 |
| Medicare (1.45%) | $27.43 | $54.86 |
| Health Insurance (Pre-Tax) | $145.00 | $290.00 |
| 401(k) Contribution (Pre-Tax) | $94.60 | $189.20 |
| Life Insurance (Post-Tax) | $12.00 | $24.00 |
| Total Deductions | $640.45 | $1,280.90 |
Net Pay — This Period
YTD Net Pay: $2,503.10
$1,251.55
Reading Each Line
| Line Item | What It Means | Calculation |
|---|
| Regular (80 hrs × $22.00) | Standard hourly pay for the period | $1,760.00 |
| Overtime (4 hrs × $33.00) | Hours beyond 40 at 1.5× rate ($22 × 1.5 = $33) | $132.00 |
| Federal Income Tax | Advance payment toward annual federal income tax | Determined by W-4 + IRS tables |
| Social Security (6.2%) | Employee share of Social Security payroll tax | $1,892 × .062 = $117.30 |
| Medicare (1.45%) | Employee share of Medicare payroll tax | $1,892 × .0145 = $27.43 |
| Health Insurance (Pre-Tax) | Employee premium; deducted before income taxes calculated | $145.00 |
| 401(k) Contribution (Pre-Tax) | 5% of gross to retirement; reduces taxable income | $1,892 × .05 = $94.60 |
| Life Insurance (Post-Tax) | Supplemental coverage; deducted after income taxes | $12.00 |
| Year to Date (YTD) | Cumulative totals since January 1; verify against period count | — |
Why Review Every Period?
Pay stubs are verification tools, not just records. Benefits elections are sometimes processed incorrectly. Hours can be miscounted. Tax withholding can be miscalculated. A worker who reviews their stub every period catches errors while they are small; one who never reads it may discover a year's worth of problems at tax filing time.
- Using Jordan's pay stub above, verify that the overtime rate is correctly calculated at 1.5× the regular rate.
- What are Jordan's total pre-tax deductions for the period? What is Jordan's taxable wage?
- Verify that Jordan's net pay equals gross pay minus total deductions.
- Jordan is paid semimonthly. How many pay periods have elapsed based on the YTD figures shown?
Section 13.4
Income Tax Withholding
Income tax withholding is the process by which an employer deducts a portion of each paycheck and sends it to the federal government (and state government, where applicable) as an advance payment toward the employee's income tax obligation. Withholding is not the tax itself — it is a prepayment. The actual tax obligation is determined when the worker files a tax return. If more was withheld than owed, the worker receives a refund. If less was withheld, the worker owes the balance due.
Form W-4 — How Employers Determine Withholding
Employers calculate withholding using the employee's Form W-4 (Employee's Withholding Certificate). This form captures filing status, multiple-job situations, dependents, and additional withholding requests. The employer applies W-4 information to IRS withholding tables to calculate each paycheck's withholding amount.
Employees can update their W-4 at any time — after marriage, a new child, a second job, or any change that affects annual tax liability.
| Filing Status | Effect on Withholding |
|---|
| Single | Generally the highest withholding rate; tax brackets are narrower |
| Married Filing Jointly | Lower withholding rate; wider tax brackets than Single |
| Head of Household | Intermediate withholding; available to qualifying single parents |
Large Refund vs. Balance Due
A large refund means you overpaid throughout the year — effectively lending the government money interest-free. A balance due means you underpaid. Neither is inherently better; the goal is accurate withholding that matches actual liability. Workers consistently over-withheld may consider submitting a new W-4 to reclaim that money throughout the year instead.
Example 13.4a
Annualizing withholding from a pay stub
- ProblemJordan's pay stub shows $168.44 in federal income tax withheld for one semimonthly period (24 per year). Estimate annual withholding.
- Solve
$168.44 × 24 = $4,042.56 estimated annual withholding
- NoteWhether this matches Jordan's actual liability depends on total annual income, credits, and deductions — determined at filing.
Estimated Annual Federal Withholding: $4,042.56
Student Warning — States Without Income Tax
Workers in Alaska, Florida, Nevada, South Dakota, Texas, Washington, and Wyoming do not have state income tax withheld. New Hampshire and Tennessee historically taxed only investment income, not wages. Workers in states with income tax will see a separate state withholding line on every pay stub.
- A worker has $210 in federal income tax withheld per biweekly period (26 periods per year). Estimate their annual federal withholding.
- A worker receives a $3,400 federal tax refund. What does this indicate about their withholding during the year? What could they do to reduce future refunds?
- A worker gets married and moves from Single to Married Filing Jointly status. All else equal, will their withholding increase or decrease? Why?
- What form does an employee use to change their withholding, and when are they allowed to submit it?
Sections 13.5 – 13.6
Payroll Taxes and the Programs They Fund
Social Security 6.2% · Medicare 1.45% · Employer Matching · Social Security Benefits · Medicare Parts
Section 13.5
Payroll Taxes
Payroll taxes are distinct from income taxes. They fund Social Security and Medicare specifically and are calculated as fixed percentages of wages regardless of filing status, deductions, or credits. Unlike income taxes, payroll taxes apply at the same rate to all workers up to certain limits.
| Tax | Employee Rate | Employer Rate | Combined Rate | Wage Cap |
|---|
| Social Security (OASDI) | 6.2% | 6.2% | 12.4% | Annual wage base (adjusted yearly) |
| Medicare (HI) | 1.45% | 1.45% | 2.9% | No cap — all wages subject |
| Total | 7.65% | 7.65% | 15.3% | — |
Example 13.5a
Verifying payroll tax calculations — Jordan's pay stub
- ProblemGross pay: $1,892.00. Verify Social Security and Medicare shown on the stub.
- Social Security
$1,892.00 × 0.062 = $117.30 ✓
- Medicare
$1,892.00 × 0.0145 = $27.43 ✓
- Employer Match
$117.30 + $27.43 = $144.73 (employer pays this additionally)
Total payroll taxes from this one period: $289.46 combined (employee + employer)
Self-Employed Workers
Self-employed workers pay both the employee and employer share — the full 15.3% — because they are both parties at once. However, they may deduct the employer-equivalent half when calculating income taxes, partially offsetting this higher rate.
- Gross pay: $2,400. Calculate Social Security withheld.
- Gross pay: $3,150. Calculate Medicare withheld.
- Gross pay: $2,800. Calculate both payroll taxes and total employee share.
- A worker's gross pay is $3,500. What is the employer's matching payroll tax cost?
- Gross pay: $1,680. Verify: Social Security shown as $104.16. Correct?
- Why do payroll taxes not depend on filing status, while income tax withholding does?
Section 13.6
Social Security and Medicare at an Introductory Level
Every paycheck connects directly to two of the largest federal programs in the United States through payroll taxes. Understanding what these programs do helps workers understand what their contributions fund — and what they may eventually receive.
Social Security
| Benefit Type | Who Qualifies | Key Details |
|---|
| Retirement Benefits | Workers with sufficient credits who reach qualifying ages | Reduced benefits from age 62; full at full retirement age; maximum at 70 |
| Disability Benefits (SSDI) | Workers unable to work due to qualifying disability | Based on earnings record; requires sufficient credits |
| Survivors' Benefits | Spouses, children, and sometimes parents of deceased workers | Amount depends on deceased worker's earnings record |
The Three-Legged Stool of Retirement
Social Security was designed as one part of retirement income, not the sole source. Financial planners often describe a "three-legged stool": (1) Social Security, (2) employer retirement plans or pensions, and (3) personal savings. Workers who rely on Social Security alone typically face significant financial hardship in retirement, as it replaces only a portion of pre-retirement income.
Medicare
| Part | Name | What It Covers |
|---|
| Part A | Hospital Insurance | Hospital stays, skilled nursing facility care, hospice, some home health care; funded by the 1.45% Medicare payroll tax |
| Part B | Medical Insurance | Doctor visits, outpatient care, preventive services, medical equipment; requires a monthly premium |
| Part C | Medicare Advantage | Private plans covering Parts A and B, often with additional benefits |
| Part D | Prescription Drug Coverage | Prescription medications through private insurers |
Connection to Your Paycheck
The 1.45% Medicare tax on every paycheck funds Part A — Hospital Insurance. Workers who pay Medicare taxes for at least 10 years (40 quarters) generally qualify for Part A with no monthly premium when they reach age 65. Workers should periodically verify their Social Security earnings record through the SSA website to confirm that reported wages are accurate — errors can affect future benefit calculations.
- Name the three types of benefits Social Security provides. Who qualifies for each?
- What does the 1.45% Medicare tax specifically fund? Which Medicare Part does it support?
- Explain the "three-legged stool" of retirement. Why does relying on only one leg create financial risk?
- A worker has been employed for 8 years and consistently earned Social Security credits. Approximately how many credits have they accumulated? Do they qualify for retirement benefits yet?
Sections 13.7 – 13.9
Deductions, Benefits, and Total Compensation
Pre-Tax Deductions · Post-Tax Deductions · Employer Benefits · Total Compensation Comparisons
Section 13.7
Pre-Tax Deductions
Pre-tax deductions are subtracted from gross pay before income taxes are calculated. Because they reduce taxable income, they reduce the income tax a worker owes. This makes pre-tax deductions more valuable, dollar for dollar, than the same amount deducted after taxes. Pre-tax deductions generally do not reduce Social Security and Medicare taxes — payroll taxes are typically calculated on gross wages.
| Common Pre-Tax Deduction | Description |
|---|
| Employer-sponsored health insurance premium | Employee share of group health plan premium; typically runs through a Section 125 Cafeteria Plan |
| Traditional 401(k) / 403(b) contribution | Retirement contribution that reduces taxable income in the contribution year |
| Health Flexible Spending Account (FSA) | Pre-tax dollars for eligible medical expenses; copays, prescriptions, eyeglasses |
| Dependent Care FSA | Pre-tax dollars for qualifying childcare or adult dependent care |
| Health Savings Account (HSA) | Pre-tax contributions for workers enrolled in qualifying high-deductible health plans |
| Dental and vision insurance premiums | Employee share of employer-sponsored dental/vision coverage |
How Pre-Tax Deductions Reduce Tax
Taxable Wage = Gross Pay − Pre-Tax Deductions
Income tax withholding is calculated on the taxable wage, not on gross pay. The lower the taxable wage, the lower the income tax withheld.
Example 13.7a
Calculating the tax benefit of pre-tax deductions
- SetupGross pay: $2,000. Pre-tax health insurance: $200. Pre-tax 401(k): $100. Assumed combined income tax rate: 20%.
- Without
Taxable Wage: $2,000.00
Income Tax (20%): $400.00
- With
Pre-Tax Deductions: $300.00
Taxable Wage: $2,000 − $300 = $1,700.00
Income Tax (20%): $340.00
- Savings
Income Tax Savings This Period: $60.00
Annualized (24 periods): $1,440.00 saved per year
Pre-tax elections saved $60 in income tax this period — $1,440 across a full year.
Example 13.7b
Jordan's taxable wage — applying pre-tax deductions
- Gross Pay
$1,892.00
- Pre-Tax
Health Insurance: $145.00
401(k) Contribution: $94.60
Total Pre-Tax: $239.60
- Taxable Wage
$1,892.00 − $239.60 = $1,652.40
Federal and state income taxes are calculated on $1,652.40, not $1,892.00.
- Gross pay: $2,500. Pre-tax deductions: $180 (health) + $125 (401(k)) + $50 (FSA). What is the taxable wage?
- A worker has a taxable wage of $1,850 and gross pay of $2,300. What are their total pre-tax deductions?
- Using a 22% combined income tax rate, calculate the income tax savings from $250 in pre-tax deductions per period. Annualize for 24 pay periods.
- Explain why pre-tax deductions are more tax-efficient than post-tax deductions of the same amount.
Section 13.8
Post-Tax Deductions
Post-tax deductions are amounts subtracted from the paycheck after income taxes have already been calculated. They do not reduce taxable income and therefore provide no immediate income tax benefit. Workers still choose post-tax deductions voluntarily for other reasons — or, in the case of garnishments, are required to pay them.
| Common Post-Tax Deduction | Description |
|---|
| Roth 401(k) contribution | Post-tax retirement savings; qualified withdrawals in retirement are tax-free (opposite trade-off from traditional 401(k)) |
| Supplemental life insurance premium | Coverage above employer-provided basic level; employee pays the additional premium post-tax |
| Short- and long-term disability premiums (employee-paid) | When paid post-tax, resulting disability benefits are typically tax-free |
| Wage garnishments | Court-ordered withholding to satisfy legal obligations (child support, defaulted loans, civil judgments) |
| Union dues | Required membership fees in unionized workplaces; typically post-tax |
| Charitable contributions | Voluntary payroll giving to designated organizations; post-tax |
Student Warning — Unrecognized Post-Tax Deductions
Any post-tax deduction you do not recognize should be investigated immediately. Wage garnishments appear without advance notice on a pay stub. Contact your payroll department and, if a garnishment is unexpected, seek legal guidance to understand your options.
- Explain the key trade-off between a traditional (pre-tax) 401(k) and a Roth (post-tax) 401(k). When might a worker prefer each?
- A worker's disability insurance premium is paid post-tax. If they become disabled and receive benefits, how are those benefits typically taxed?
- A worker notices a $75 deduction labeled "Court Order" that they did not previously see. What should they do?
- A worker has gross pay of $2,000, pre-tax deductions of $250, income taxes of $310, payroll taxes of $153, and post-tax deductions of $35. What is net pay?
Section 13.9
Benefits and Take-Home Pay
Employee benefits are forms of compensation beyond wages. Many benefits are paid entirely by the employer and do not appear as deductions on the employee's pay stub — which means they are invisible to the worker who never looks beyond the stub. Understanding the full value of a compensation package requires looking beyond net pay.
| Employer-Paid Benefit | Visible on Pay Stub? | Example Value |
|---|
| Employer health insurance contribution | No — employer pays separately | $600–$1,000+/month |
| Employer 401(k) match | No — additional employer contribution | 50–100% of employee contribution up to a limit |
| Employer-paid basic life insurance | No | 1–2× annual salary |
| Employer-paid disability insurance | No | 60–70% of salary if disabled |
| Paid time off, parental leave | No (reflected in hours paid) | 2–6 weeks/year or more |
Example 13.9a
Comparing total compensation — two job offers
- Job AAnnual salary $50,000. No health insurance offered. No retirement match.
- Job BAnnual salary $48,000. Employer pays $7,200/yr toward health insurance (employee pays $2,100). Employer matches 100% of 401(k) up to 3% of salary ($1,440/yr).
- Job A Total
$50,000 salary + $0 benefits = $50,000
- Job B Total
$48,000 + $7,200 (employer health) + $1,440 (employer match) = $56,640
Job B provides $6,640 more in total compensation despite the lower salary.
Student Warning — Benefits Are Not Free
Declining health insurance to preserve take-home pay saves $145 per month ($1,740/year) — but one unexpected hospitalization can cost tens of thousands of dollars. Open enrollment decisions involve real risk, not just arithmetic. Consider both the cost and the risk before declining coverage.
- Job A offers $55,000 salary with no benefits. Job B offers $51,000 salary, employer health contribution of $6,600/yr, and 401(k) match of $1,275/yr. Which job has higher total compensation?
- A worker's employer contributes $750/month toward health insurance. The worker pays $175/month. What is the total monthly premium, and what percentage does the employer cover?
- During open enrollment, a worker considers declining dental insurance ($18/month, pre-tax). What information would help them make this decision responsibly?
- A worker has been at a company for two years and has never reviewed their pay stub. Name three errors that could have gone undetected during that time.
Section 13.10
Reading a Paycheck Carefully
Eight-Step Review · Full Worked Example · Common Error Table · Error Response Process
Section 13.10
Reading a Paycheck Carefully
Every skill in this chapter serves one practical goal: the ability to pick up any pay stub and read it completely, verify it accurately, and act on any errors you find. This section synthesizes the chapter into a systematic review process and applies it to a full worked example.
Eight-Step Pay Stub Review Process
Step 1 — Confirm the basics: your name, employee ID, pay period dates, and pay date.
Step 2 — Verify gross pay: hours, hourly rate, overtime at 1.5×, salary per period, any bonuses.
Step 3 — Check federal and state income tax withholding: reasonable given W-4 elections? Updated after life changes?
Step 4 — Verify payroll taxes: Social Security at 6.2%, Medicare at 1.45% of gross. Calculate yourself if anything looks unusual.
Step 5 — Verify pre-tax deductions: match elected amounts for health, dental, retirement, FSA, HSA.
Step 6 — Verify post-tax deductions: recognize and authorize every line.
Step 7 — Calculate net pay yourself: gross minus total deductions. Does it match the stated figure and the deposited amount?
Step 8 — Review YTD figures: do cumulative totals match the number of elapsed pay periods × the current period's amounts?
Worked Example: Full Pay Stub Review — Camille Okafor
Employee: Camille Okafor
Employee ID: 88345
Pay Schedule: Semimonthly
Filing Status (W-4): Single
Earnings
| Type | Hours | Rate | Amount |
|---|
| Regular | 80 | $28.00 | $2,240.00 |
| Gross Pay | | | $2,240.00 |
Deductions
| Description | This Period | Year to Date |
|---|
| Federal Income Tax | $251.00 | $4,770.00 |
| State Income Tax | $89.60 | $1,702.40 |
| Social Security (6.2%) | $138.88 | $2,638.72 |
| Medicare (1.45%) | $32.48 | $616.96 |
| Health Insurance (Pre-Tax) | $180.00 | $3,420.00 |
| 403(b) Contribution (Pre-Tax) | $112.00 | $2,128.00 |
| Dental Insurance (Pre-Tax) | $18.00 | $342.00 |
| Life Insurance (Post-Tax) | $9.00 | $171.00 |
| Total Deductions | $830.96 | $15,789.08 |
Net Pay — This Period
YTD Net Pay included in total above
$1,409.04
Example 13.10a
Applying the eight-step review to Camille's pay stub
- Step 4 — SS
$2,240.00 × 0.062 = $138.88 ✓
- Step 4 — Medicare
$2,240.00 × 0.0145 = $32.48 ✓
- Step 5 — Taxable Wage
Pre-tax: $180 + $112 + $18 = $310.00
Taxable Wage: $2,240 − $310 = $1,930.00
- Step 7 — Net Pay
$2,240.00 − $830.96 = $1,409.04 ✓
- YTD Check
YTD SS: $2,638.72 ÷ $138.88 = 19 periods
Annual estimate: $2,240 × 24 = $53,760
- Employer Match
SS match: $138.88 + Medicare match: $32.48 = $171.36
All figures verified. Taxable wage: $1,930. Net pay: $1,409.04. Employer's additional payroll tax: $171.36.
Common Pay Stub Errors and How to Detect Them
| Error | How to Detect |
|---|
| Wrong number of hours recorded | Compare stub hours to personal time records every period |
| Wrong hourly rate | Compare rate on stub to your employment agreement or offer letter |
| Overtime not calculated at 1.5× | Manually calculate: Hourly Rate × 1.5 × OT hours |
| Pre-tax benefit not applied correctly | Verify: Taxable Wage = Gross − All pre-tax deductions |
| Incorrect Social Security or Medicare rate | Calculate 6.2% and 1.45% of gross; compare to stub |
| Unrecognized post-tax deduction | Investigate any unfamiliar line with payroll immediately |
| Benefits deduction doesn't match election | Compare stub amounts to benefits enrollment confirmation |
| YTD figures inconsistent with period count | Divide YTD figure by number of elapsed periods; compare to current period |
What to Do When You Find an Error
Gather documentation: pay stubs, employment agreement, benefits enrollment confirmation, time records. Contact the payroll department promptly and specifically — identify the exact line, the error, and the correct amount. Request written confirmation of when and how the correction will appear. Review the corrected paycheck when it arrives to verify the fix. If the error involved taxes — particularly if it persisted over multiple periods — ask how corrections will be handled at year-end.
Use Devon Sharpe's pay stub below to answer all questions.
Employee: Devon Sharpe
Employee ID: 60219
Pay Schedule: Semimonthly
Filing Status: Married Filing Jointly
Earnings
| Type | Hours | Rate | Amount |
|---|
| Regular | 80 | $31.00 | $2,480.00 |
| Overtime | 6 | $46.50 | $279.00 |
| Gross Pay | | | $2,759.00 |
Deductions
| Description | This Period | Year to Date |
|---|
| Federal Income Tax | $248.31 | $4,718.89 |
| State Income Tax | $110.36 | $2,096.84 |
| Social Security (6.2%) | $171.06 | $3,250.14 |
| Medicare (1.45%) | $40.01 | $760.19 |
| Health Insurance (Pre-Tax) | $200.00 | $3,800.00 |
| HSA Contribution (Pre-Tax) | $75.00 | $1,425.00 |
| 401(k) Contribution (Pre-Tax) | $137.95 | $2,621.05 |
| Life Insurance (Post-Tax) | $14.50 | $275.50 |
| Total Deductions | $997.19 | $18,947.61 |
Net Pay — This Period
YTD Net Pay: calculated from total above
$1,761.81
- Verify Devon's Social Security withholding.
- Verify Devon's Medicare withholding.
- What are Devon's total pre-tax deductions for this period?
- What is Devon's taxable wage for income tax calculation purposes?
- Verify Devon's net pay by calculating gross pay minus total deductions.
- Based on YTD data, how many pay periods have elapsed in the year?
- Estimate Devon's annual gross pay based on this period's earnings.
- What is the employer's estimated matching payroll tax cost for this period?
- Verify that Devon's overtime rate is correctly calculated at 1.5× the regular rate.
- Devon contributed 5% of gross to the 401(k). Verify this matches the deduction shown.
Chapter 13 — Back Matter
Chapter Summary
- Sec 13.1Taxes appear on paychecks because employers are legally required collection agents for federal and state governments. Withholding is an advance payment against year-end tax liability — not a punishment. The five deduction categories are federal income tax, state income tax, payroll taxes, pre-tax deductions, and post-tax deductions.
- Sec 13.2Gross pay is total compensation before deductions. Net pay is what the worker receives. Hourly gross pay: rate × hours, plus overtime at 1.5× for hours over 40 per week. Salaried gross pay: annual salary ÷ pay periods per year. Always budget from net pay, not gross.
- Sec 13.3A pay stub documents the journey from gross to net. It shows earnings, each deduction line, and year-to-date totals. Review every pay period to catch errors before they compound. YTD figures allow verification against the number of elapsed pay periods.
- Sec 13.4Income tax withholding is an advance payment toward annual tax liability — not the tax itself. Employers use Form W-4 and IRS tables to calculate withholding. Over-withholding produces a refund; under-withholding produces a balance due. Workers can update Form W-4 at any time.
- Sec 13.5Payroll taxes fund Social Security (6.2%) and Medicare (1.45%). Both employee and employer pay equal shares. Self-employed workers pay both sides (15.3%) but may deduct the employer-equivalent half. Payroll taxes are flat-rate, unlike graduated income taxes.
- Sec 13.6Social Security provides retirement, disability, and survivors' benefits based on lifetime earnings. Medicare provides health coverage primarily for those 65 and older. The 1.45% payroll tax funds Part A (Hospital Insurance). Social Security alone is insufficient for retirement — the three-legged stool also requires employer plans and personal savings.
- Sec 13.7Pre-tax deductions reduce taxable income and lower income tax withholding. Common examples: health insurance premiums, 401(k) contributions, FSA and HSA contributions. Taxable Wage = Gross Pay − Pre-Tax Deductions. Income taxes are calculated on taxable wage, not gross pay.
- Sec 13.8Post-tax deductions come out after income taxes are calculated. They reduce take-home pay but not taxable income. Examples: Roth 401(k), supplemental life insurance, wage garnishments, union dues. Any unrecognized post-tax deduction should be investigated with payroll immediately.
- Sec 13.9Many employer benefits are invisible on the pay stub but represent real compensation: employer health insurance contributions, 401(k) matching, paid disability insurance. Total compensation = wages + value of all benefits. Job comparisons require looking beyond salary.
- Sec 13.10A systematic eight-step pay stub review verifies identity information, gross pay, tax withholding, payroll taxes, pre-tax deductions, post-tax deductions, net pay, and YTD totals. Errors must be reported to payroll promptly with documentation, and corrections must be verified when they appear.
Key Terms Review
gross pay
Total compensation earned in a pay period before any taxes or deductions are subtracted.
net pay
The amount received after all taxes and deductions are subtracted from gross pay; the number that drives financial planning.
income tax withholding
An advance payment of income taxes deducted from each paycheck and sent to the government; reconciled at tax filing.
payroll taxes
Taxes specifically funding Social Security and Medicare, calculated as fixed percentages of wages shared equally between employee and employer.
Social Security tax
A payroll tax of 6.2% of wages (employee share) up to the annual wage base, funding retirement, disability, and survivors' benefits.
Medicare tax
A payroll tax of 1.45% of all wages (employee share, no cap), funding Part A hospital insurance for those 65 and older.
pre-tax deduction
A deduction subtracted before income taxes are calculated; reduces taxable income and lowers income tax withholding.
post-tax deduction
A deduction subtracted after income taxes are calculated; reduces take-home pay but not taxable income.
taxable wage
Gross pay minus all pre-tax deductions; the amount on which income tax withholding is calculated.
pay stub
The document showing earnings, all deductions, net pay, and year-to-date totals for each pay period.
Form W-4
The Employee's Withholding Certificate; used by employers to calculate how much federal income tax to withhold from each paycheck.
overtime pay
Compensation at a minimum of 1.5× the regular hourly rate for hours worked beyond 40 in a workweek, as required by federal law.
year to date (YTD)
Cumulative totals from the first pay period of the calendar year through the current period.
refund
Money returned to a taxpayer when annual withholding exceeded actual tax liability; indicates over-withholding during the year.
balance due
The amount owed when annual tax liability exceeded withholding; indicates under-withholding during the year.
total compensation
The full value of a worker's pay package: wages plus the value of all employer-provided benefits.
employer matching
Employer contributions to a retirement account that match, in whole or in part, the employee's own contributions.
wage garnishment
A court-ordered post-tax deduction from wages to satisfy a legal obligation such as child support or a civil judgment.
401(k) / 403(b)
Employer-sponsored retirement savings accounts; traditional contributions are pre-tax, reducing taxable income in the contribution year.
Section 125 Cafeteria Plan
A tax code provision allowing certain employee benefit premiums to be paid on a pre-tax basis through payroll deductions.
Formula Reference
| Formula | Expression |
|---|
| Gross pay (hourly, no overtime) | Hourly Rate × Regular Hours |
| Gross pay (with overtime) | (Rate × 40) + (Rate × 1.5 × OT Hours) |
| Gross pay (salaried, per period) | Annual Salary ÷ Pay Periods Per Year |
| Social Security withheld | Gross Pay × 0.062 |
| Medicare withheld | Gross Pay × 0.0145 |
| Taxable wage | Gross Pay − Pre-Tax Deductions |
| Net pay | Gross Pay − All Taxes − All Deductions |
| Annualized gross (estimate) | Gross Pay Per Period × Pay Periods Per Year |
| YTD verification | Gross Pay Per Period × Number of Periods Elapsed |
Skill Practice
- Aisha earns $15.75/hr; 40 regular hours + 5 overtime hours. Find gross pay.
- Ben earns $67,600 annually, paid biweekly. Find gross pay per period.
- Rosa earns $19.00/hr; 47 hours worked this week. Find gross pay (OT at 1.5×).
- Annual salary: $72,000; monthly pay. Find gross pay per period.
- Gross pay: $2,850. Calculate Social Security and Medicare withheld.
- Gross pay: $3,400. Calculate total employee payroll taxes.
- Gross pay: $1,975. What is the employer's matching payroll tax cost?
- Terrence's YTD Social Security is $2,170 after 10 periods. Gross is $3,500/period. Verify.
- Gross: $2,850; pre-tax deductions: $352.50. What is the taxable wage?
- Gross: $2,600; pre-tax: $350; federal tax: $215; state: $91; SS: $161.20; Medicare: $37.70; post-tax: $22. Find net pay.
- A worker has taxable wage of $1,750 and gross pay of $2,100. Total pre-tax deductions?
- Gross: $3,200; pre-tax: $480; income taxes: $425; payroll taxes: $244.80; post-tax: $30. Find net pay.
Decision Scenario Practice
Scenario A — Benefits Election
Should Yusuf enroll in employer health insurance?
Yusuf has just started a new job. The employee's monthly premium would be $195 (pre-tax); the employer pays $620/month. Yusuf is currently uninsured.
- What is the total monthly premium for this health plan?
- Since this is a pre-tax deduction, if Yusuf is in a 22% combined income tax bracket, approximately how much does the pre-tax nature save him per year?
- If Yusuf declines the insurance to save $195/month ($2,340/year), identify two specific financial risks of this decision.
- What information is missing that would help Yusuf make a better decision?
Scenario B — Withholding Review
Fatima received a $2,800 federal tax refund
Her coworker said this means she was "doing well on taxes." Her financial advisor called it an "interest-free loan to the government."
- Explain what a large refund means in terms of withholding throughout the year.
- Is a large refund always good, always bad, or does it depend? Explain your answer.
- What could Fatima do if she wants future refunds to be smaller? What form does she use?
- What is the risk of reducing withholding too aggressively?
Scenario C — Job Offer Comparison
Marcus is choosing between two offers
Job A: $58,000 salary. No health insurance. No retirement match. Job B: $54,000 salary. Employer pays $8,400/yr toward health; employee pays $2,100/yr pre-tax. Employer matches 100% of 401(k) up to 4% of salary.
- Calculate the maximum annual employer 401(k) match for Job B if Marcus contributes enough to capture it.
- Calculate total estimated compensation for each job (salary + employer contributions).
- Which job has higher total compensation? By how much?
- If Marcus takes Job A and must buy individual health insurance at $700/month post-tax, how does this change the comparison?
Error Analysis
Each problem contains an error in reasoning or calculation. Identify the error and explain the correct approach.
Error 1
"My annual salary is $48,000, so I can budget $4,000 per month."
What is wrong with this reasoning? What should the worker use instead?
Error 2
A paycheck shows $62 Medicare withheld on gross pay of $4,000. "That looks about right."
Calculate the correct Medicare amount. Is $62 correct? Show your work.
Error 3
"I have $300 in pre-tax deductions this period. That means I saved $300 on taxes."
What is the error? What does $300 in pre-tax deductions actually save, and what does that depend on?
Error 4
"Getting a big tax refund is always better than owing money — it means you paid less in taxes overall."
Correct this misunderstanding. What does a large refund actually indicate about annual withholding?
Error 5
"My employer pays for health insurance, so I don't need to think about it when comparing job offers."
Explain why employer-paid benefits matter in job comparisons even when they don't appear on the pay stub.
Error 6
"To reduce my federal income tax withholding, I need to file a new Form W-2."
Identify the error. What form is used to adjust withholding, and when may it be submitted?
Chapter 13 Checkpoint
Chapter 13 Checkpoint
Complete without assistance — assesses all key skills and concepts from Chapter 13
Section 1 — Vocabulary and Concepts
- Define gross pay and net pay. Explain why a worker should always plan their budget using net pay, not gross pay.
- Explain the difference between income tax withholding and payroll taxes. What does each fund?
- Define pre-tax deduction. Explain, using the formula Taxable Wage = Gross Pay − Pre-Tax Deductions, how pre-tax deductions reduce income tax withholding.
Section 2 — Gross Pay Calculations
- A worker earns $17.50/hour and works 40 regular hours plus 6 overtime hours. Calculate gross pay (overtime at 1.5×).
- A worker earns an annual salary of $54,600 and is paid semimonthly. What is gross pay per period?
- A worker earns $22/hour and works 45 hours in a week. Compare gross pay with and without overtime.
Section 3 — Payroll Tax Calculations
- Gross pay: $2,100. Calculate Social Security (6.2%) and Medicare (1.45%) withheld.
- Gross pay: $3,250. What is the employer's matching payroll tax cost for this period?
- A pay stub shows $186.50 in Social Security withheld on gross pay of $3,000. Is this correct? Show your calculation.
Section 4 — Pay Stub Verification
- Gross pay: $2,400. Pre-tax deductions: $220 (health) + $120 (401k). What is the taxable wage?
- Gross pay: $2,750; pre-tax deductions: $350; income taxes: $290; SS: $170.50; Medicare: $39.88; post-tax: $18. Calculate net pay.
- A pay stub shows $3,800 in YTD federal withholding after 19 pay periods, with current period showing $200 withheld. Is the YTD figure consistent?
Section 5 — Applications
- Job A: $60,000 salary, no benefits. Job B: $55,000 salary, $9,000/yr employer health contribution, $1,650/yr employer 401(k) match. Which has higher total compensation? By how much?
- A worker notices an unfamiliar $65 post-tax deduction on their pay stub labeled "Judgment." List the steps they should take.
Section 6 — Error Analysis
- A worker is paid biweekly and has $180 in federal income tax withheld per period. They expect a refund. Estimate annual withholding. If their actual tax liability is $5,200, will they receive a refund or owe money? How much?
- A student claims that pre-tax deductions of $400 saved the worker exactly $400 in taxes. What is wrong with this claim? What does the tax savings actually depend on?
Looking Ahead
Chapter 14: Filing Taxes and Understanding Tax Responsibility
Chapter 13 introduced taxes through the paycheck — the first point of contact most workers have with the tax system. Chapter 14 moves the next step forward: filing a tax return. Filing is how the government and the worker reconcile what was withheld throughout the year against what was actually owed. Chapter 14 will explain the major tax forms, filing status, taxable income, deductions, credits, refunds, amounts owed, record keeping, and common filing mistakes. The vocabulary from this chapter — gross income, withholding, taxable wage, pre-tax deductions — connects directly into Chapter 14. Students who can read their paycheck are already well-prepared to understand their tax return.
MGU Library Connection
- Chapter 14: Filing Taxes and Understanding Tax Responsibility — direct continuation of this chapter
- Chapter 9: Emergency Funds and Savings Goals — connect net pay to savings planning
- Chapter 10: Investing and Retirement Accounts — 401(k) pre-tax strategy and compound growth
- Chapter 11: Insurance Fundamentals — benefits election and risk management
- IRS Publication 15-T: Federal Income Tax Withholding Methods — employer withholding tables
- SSA.gov: my Social Security account — verify your lifetime earnings record
- MGU Dictionary entries: gross pay, net pay, payroll tax, withholding, pre-tax deduction, Form W-4
Chapter 13 Checklist
Before moving to Chapter 14, confirm that you can:
- Explain the difference between gross pay and net pay
- Calculate gross pay for hourly workers, including overtime at 1.5×
- Calculate gross pay for salaried workers on any standard pay schedule
- Identify and explain every major section of a pay stub
- Calculate Social Security (6.2%) and Medicare (1.45%) withholding from gross pay
- Explain what income tax withholding is and how it differs from the final tax bill
- Define pre-tax deduction and calculate taxable wage after pre-tax deductions
- Identify common pre-tax deductions: health insurance, 401(k), HSA, FSA
- Define post-tax deduction and recognize common examples
- Explain employer matching and employer-paid benefits and why they affect total compensation
- Apply the eight-step review process to verify a pay stub for accuracy
- Identify common pay stub errors and describe the correct steps to address them