Income Breakdown Slides Income Breakdown
Gross vs. Net Pay
The $300 Question
"If you earn $15/hour and work 20 hours, your paycheck will be less than $300."
WHY?
Gross Income
Definition
The total amount of money you earn before any taxes or deductions are taken out.
Formula
Hourly Rate × Hours Worked
"The Big Number"
The Shrinkage: Deductions
Mandatory
Federal Income Tax
State Income Tax
FICA (Social Security & Medicare)
Voluntary
Health Insurance Premium
Retirement Savings (401k)
Union Dues / Charitable Giving
Net Income
"The Real Number"
The amount of money you actually "take home" after all deductions have been removed.
Gross Pay − Deductions = Net Pay
Quick Check
Test your knowledge
1. Which number is always larger?
A. Gross Income
B. Net Income
2. Is health insurance mandatory?
A. Yes
B. No (Voluntary)
Wage Warrior Worksheet Wage Warrior
Gross vs. Net Income Practice
Name:
Date:
Part 1: The Gross Calculation
Gross Income = Hourly Rate × Hours Worked
1. Alex works at a local coffee shop earning $16.50 per hour. Last week, Alex worked 24 hours. Calculate the Gross Pay.
2. Jordan is a lifeguard earning $19.00 per hour. During a holiday week, Jordan worked 38 hours. Calculate the Gross Pay.
Part 2: The Net Reality
Net Pay = Gross Pay − Total Deductions
3. Casey has a Gross Pay of $840.00. The following deductions are applied:
Federal Income Tax: $105.00
FICA Taxes: $64.26
Health Insurance (Voluntary): $45.00
A) What is the total amount of deductions?
B) What is Casey's Net Pay (Take-home pay)?
4. Taylor earns $1,200 gross per paycheck. Taylor's total Mandatory Deductions are $240 and Voluntary Deductions (401k and Gym Membership) are $110. Calculate the Net Pay.
Part 3: Thinking Big
Explain in your own words why voluntary deductions might be worth the lower take-home pay. Provide one specific example.
Wage Warrior Answer Key Answer Key
Wage Warrior Worksheet
Teacher Resource
Part 1: The Gross Calculation
1. Alex: $16.50/hr × 24 hours
Answer: $396.00
2. Jordan: $19.00/hr × 38 hours
Answer: $722.00
Part 2: The Net Reality
3. Casey: Gross $840.00
A) Total Deductions:
$105.00 + $64.26 + $45.00 = $214.26
B) Net Pay:
$840.00 − $214.26 = $625.74
4. Taylor: Gross $1,200
Deductions: $240 (Mandatory) + $110 (Voluntary) = $350 total
Net Pay: $1,200 − $350 = $850.00
Part 3: Thinking Big
Sample Response Guide:
"Voluntary deductions can be worth it because they provide long-term benefits or essential services that might be more expensive if paid for individually outside of a paycheck. For example, contributing to a retirement fund (401k) allows an employee to save for the future automatically and often includes a company match (free money). Health insurance through an employer is often much cheaper than buying a private plan."
Pay Stub Decode Slides Decoding the Stub
Cracking the Payroll Code
Alphabet Soup
FICA
Federal Insurance Contributions Act (Social Security + Medicare)
YTD
Year To Date (Total earned or paid since Jan 1st)
OASDI
Old-Age, Survivors, and Disability Insurance (Social Security)
FED WH
Federal Withholding (Income Tax sent to the IRS)
Anatomy of a Pay Stub
Header
Company info, Employee name, Pay period dates.
Earnings
Hourly rate, hours worked, overtime, gross pay.
Deductions
Taxes, benefits, union dues, and net pay total.
Scavenger Hunt!
I'm going to give you a fictional pay stub for "Riley Reynolds." You need to find 10 specific pieces of information hidden in the document.
Speed and Accuracy Count!
Pay Stub Scavenger Hunt Worksheet Stub Scavenger Hunt
Decoding Employee Earnings
Name:
TECHNO-WIZARD SOLUTIONS
123 Silicon Alley, Austin, TX 78701
Pay Statement
Pay Date: 10/15/2025
EMPLOYEE: RILEY REYNOLDS
ID: #88291
PERIOD START: 10/01/2025
PERIOD END: 10/14/2025
Earnings Rate Hours Current YTD Regular Pay $22.00 80.00 $1,760.00 $33,440.00 Overtime $33.00 4.00 $132.00 $1,254.00 Gross Earnings $1,892.00 $34,694.00
Statutory Deductions Current YTD Federal Income Tax (FED WH) $185.42 $3,411.00 OASDI (Social Security) $117.30 $2,151.00 Medicare $27.43 $503.00 TX State Tax $0.00 $0.00 Net Pay (Take Home) $1,561.85 --
1. What is Riley's hourly rate of pay?
2. How many total hours did Riley work this period?
3. What is Riley's Gross Pay for this period?
4. How much has Riley earned total so far this year?
5. What does the acronym OASDI stand for?
6. Which tax takes the most money out of Riley's check?
7. Why is the "TX State Tax" $0.00? (Hint: Think about TX)
8. What is the final Net Pay Riley receives?
Pay Stub Scavenger Hunt Answer Key Answer Key
Stub Scavenger Hunt
Teacher Resource
1. What is Riley's hourly rate of pay?
$22.00
2. How many total hours did Riley work this period?
84 hours (80 Regular + 4 Overtime)
3. What is Riley's Gross Pay for this period?
$1,892.00
4. How much has Riley earned total so far this year?
$34,694.00 (Gross YTD)
5. What does the acronym OASDI stand for?
Old-Age, Survivors, and Disability Insurance (Social Security)
6. Which tax takes the most money out of Riley's check?
Federal Income Tax ($185.42)
7. Why is the "TX State Tax" $0.00?
Texas is one of the states that does not collect state income tax.
8. What is the final Net Pay Riley receives?
$1,561.85
W-4 Walkthrough Slides Day One Paperwork
Mastering the W-4 Form
The W-4 Purpose
The W-4 Form tells your employer exactly how much Federal Income Tax to take out of your paycheck.
Too Little?
You'll owe money at tax time.
Too Much?
Your paychecks will be smaller (but you'll get a refund).
The 3 Crucial Steps
01
Personal Info
Name, Address, SSN, and Filing Status (Single, Married, etc.).
02
Adjustments
Do you have other jobs? Kids? Other income? These change your tax rate.
03
The Signature
Without this, the form is invalid and you'll be taxed at the highest rate!
Time to Hire!
You are about to receive your New Hire Packet. Read your assigned persona carefully, then fill out the W-4 so your taxes are handled correctly.
W-4 Simulation Worksheet The New Hire Packet
W-4 Simulation Activity
Name:
Step 1: Choose Your Persona
Read the following scenarios. Your teacher will assign you one, or you may choose. Circle your persona.
A. The Student
Riley is 16 and this is their only job. They are single and live with their parents. They have no children or other income.
B. The Parent
Morgan is married and has two children under 17. Their spouse does not work. This is their family's only source of income.
C. The Side-Hustler
Jordan is single but works two jobs. They want to make sure an extra $20 is taken out of every check to avoid a tax bill.
Simplified Form W-4
Internal Revenue Service (SIMULATED)
1 Personal Information & Filing Status
First & Last Name
Social Security Number
Filing Status (Check one)
Single
Married filing jointly
Head of household
2-4 Adjustments (Claiming Dependents & Extra Withholding)
Claim Dependents
Multiply number of children by $2,000
$ ________
Extra Withholding
Any additional amount you want withheld per pay period
$ ________
5 Signature & Date
Employee's Signature
Today's Date
Reflect: How would choosing "Single" instead of "Married filing jointly" change your take-home pay? FICA Deep Dive Slides FICA Explained
Social Security & Medicare
Who is FICA?
FICA stands for the Federal Insurance Contributions Act.
It's not one person—it's a law that requires a portion of your income to fund two major social programs.
The Two Pillars of FICA
6.2%
Social Security
Provides income for retired people, people with disabilities, and survivors of deceased workers.
Retirement & Safety
1.45%
Medicare
Provides health insurance for people aged 65 and older and for younger people with certain disabilities.
Health & Wellness
Paying it Forward
The money taken from your paycheck today isn't sitting in a vault waiting for you. It is paying for the benefits being received by retirees right now.
When you retire, the workers of that time will be paying for you.
FICA Math Worksheet FICA Math
Funding the Safety Net
Name:
Social Security
6.2%
(0.062)
Medicare
1.45%
(0.0145)
Total FICA
7.65%
(0.0765)
1. The Entry Level Check
Sam earns $400.00 gross per week. Calculate Sam's FICA contributions.
Social Security (6.2%):
\( 400 \times 0.062 = \)
Medicare (1.45%):
\( 400 \times 0.0145 = \)
2. The Professional Salary
Casey's bi-weekly gross pay is $2,850.00. Calculate the total FICA deduction.
3. Working in Reverse
If an employee's Social Security deduction was $31.00 exactly, what was their total Gross Pay? (Hint: Divide by 0.062)
Reflect & Discuss
Some people argue that FICA taxes are unfair because young workers might not see the benefits for 50 years. Others argue they are the foundation of a stable society. Based on what you've learned about the two programs (Retirement and Healthcare), do you think these taxes are a good investment for your future? Why or why not?
Paycheck Audit Slides The Payroll Audit
Self-Advocacy in Finance
Why Check Your Stub?
Even the best companies make mistakes. Software glitches, human errors in data entry, or outdated tax tables can all lead to Incorrect Pay.
Crucial Fact
"It is your responsibility to verify your earnings. If you don't catch it, no one else will."
Incorrect Hours Reported
Wrong Tax Rate Applied
Deductions for Benefits You Canceled
The Auditor's Checklist
1
"Does my Gross Pay match my Hourly Rate × Hours?"
2
"Is Social Security exactly 6.2% of my Gross?"
3
"Is Medicare exactly 1.45% of my Gross?"
4
"Does Gross − All Deductions = Net Pay?"
Mission: The Audit
You will be handed a "Glitchy" pay stub for an employee named Jamie Justice.
Jamie suspects their paycheck is wrong. Using Jamie's timecard and your knowledge of FICA rates, find the 3 errors and calculate what Jamie's actual take-home pay should be.
Paycheck Audit Worksheet The Audit Challenge
Case: Jamie Justice vs. The Glitch
Auditor Name:
Timecard: Jamie Justice
Mon: 8.0 hrs
Tue: 8.5 hrs
Wed: 8.5 hrs
Thu: 9.0 hrs
Fri: 8.0 hrs
TOTAL HOURS: 42.0 hrs
"Pay Rate: $20.00/hr. All hours paid at flat rate (No overtime this period per special contract)."
GLITCHY STUB
Jamie's Pay Stub
EARNINGS
Regular (40 hrs @ $20) $800.00
GROSS PAY: $800.00
DEDUCTIONS
Federal Income Tax $96.00
Social Security (FICA) $64.00
Medicare (FICA) $11.60
TOTAL DEDUCTIONS: $171.60
NET PAY: $620.40
Auditor's Findings
1. Error in Gross Pay:
Compare the timecard hours to the pay stub hours. What is wrong?
2. Error in FICA Calculations:
Recalculate Social Security (6.2%) and Medicare (1.45%) using the Correct Gross Pay. Which deduction on the stub is wrong?
3. The Final Net Total:
Show the final correct calculation: Correct Gross − All Correct Deductions = Correct Net Pay.
Paycheck Audit Answer Key Audit Answer Key
Case: Jamie Justice
Teacher Resource
1. Gross Pay Error
The timecard shows 42 hours, but the pay stub only listed 40 hours.
Correct Gross: 42 hrs × $20.00 = $840.00
2. FICA Calculation Errors
The stub listed Social Security as $64.00, which was calculated incorrectly (8% of $800 instead of 6.2%). Medicare was also calculated on the wrong gross amount.
Correct SS (6.2%)
$840 × 0.062 = $52.08
Correct Med (1.45%)
$840 × 0.0145 = $12.18
3. Final Audit Results
<table class="w-full text-left font-mono"><tbody><tr class="border-b"><td class="py-2">Correct Gross Pay</td><td class="py-2 text-right">$840.00</td></tr><tr class="border-b italic text-slate-400"><td class="py-2">Federal Income Tax (Unchanged)</td><td class="py-2 text-right">($96.00)</td></tr><tr class="border-b text-emerald-600"><td class="py-2">Correct Social Security</td><td class="py-2 text-right">($52.08)</td></tr><tr class="border-b text-emerald-600"><td class="py-2">Correct Medicare</td><td class="py-2 text-right">($12.18)</td></tr><tr class="font-bold text-xl bg-slate-900 text-white"><td class="p-4">CORRECT NET PAY</td><td class="p-4 text-right">$679.74</td></tr></tbody></table>
Difference from original stub: Jamie was underpaid by $59.34.