A payroll specialist makes sure every person is paid the right amount, on time, with the right taxes and deductions taken out. People notice payroll only when it goes wrong, so accuracy and calm communication are the job. You will collect hours, check them, calculate gross-to-net pay, run payroll in a system, reconcile to the bank, and answer employee questions. The good news: you can learn the core of this without paying for anything. The IRS, the Department of Labor, and state agencies publish the actual rules for free, and Excel skills are easy to practice at home. Learn in this order: pay
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Stage 1 of 4 · about 8 weeks
Learn how pay works: gross pay, hourly vs salary, overtime at 1.5x over 40 hours, pay periods, and the difference between exempt and non-exempt. Learn FICA (Social Security 6.2%, Medicare 1.45%), federal income tax withholding with Form W-4, and pre-tax vs post-tax deductions. Practice calculating a paycheck by hand and in Excel until it is easy.
Gross pay: hourly, salary, and pay periods
Every paycheck starts with gross pay. If gross is wrong, every tax and deduction after it is wrong too. This is the first thing you will check on the job when someone says their check looks off.
Overtime and exempt vs non-exempt status
Misclassifying employees or miscalculating overtime is one of the most common and expensive payroll errors. Employers owe back wages when this goes wrong, so payroll staff must understand the rules even though HR or legal usually decides status.
Payroll taxes: FICA and federal income tax withholding
Taxes are the largest deduction on most paychecks, and employers are legally responsible for withholding them correctly. Getting these wrong creates penalties for the company and frustration for employees.
Deductions: pre-tax vs post-tax, and net pay
Deductions are where most paycheck questions come from. If you know which taxes each deduction reduces, you can explain any pay stub and spot mistakes quickly.
Excel for paycheck calculations
Nearly every payroll job uses Excel to check, reconcile, and explain payroll. Building your own calculator shows you how the math works, which makes you more confident when a payroll system gives a surprising result.
Then 3 more stages (about 60 weeks in all) with lessons, drills, projects, 10 interview questions with strong answers and free resources.