Simple definition
Payroll taxes are amounts withheld from your paycheck to fund Social Security and Medicare, plus income-tax withholding sent toward your yearly tax bill. The Social Security and Medicare portion is called FICA. For employees, FICA is 7.65% of wages — 6.2% for Social Security and 1.45% for Medicare — and your employer matches that same amount. Think of it as automatic contributions taken before the money reaches you.
Why it matters
Payroll taxes are often the biggest deduction on a paycheck, so understanding them explains the gap between your salary and your take-home pay. They also fund the Social Security and Medicare benefits you may rely on later, so the money is building toward future support.
Real-life example
Suppose you earn $4,000 in a pay period. FICA takes 7.65%, or about $306 — $248 for Social Security and $58 for Medicare. Your employer contributes another $306 on your behalf. Income-tax withholding is deducted separately based on the details you entered on your W-4.
Common mistakes
- Confusing FICA payroll taxes with your federal income tax withholding.
- Forgetting that employers pay a matching share you never see.
- Assuming payroll taxes count toward a refund like income-tax withholding can.
- Overlooking that the self-employed pay both the employee and employer shares.
Pro tips
- Review your pay stub to see the FICA and income-tax lines separately.
- If self-employed, budget for the full 15.3% self-employment tax.
- Adjust your W-4 withholding if your income-tax refund or bill is far off.
- Track total FICA paid; it ties to your future Social Security record.
Related Money Dictionary terms
- FICAThe payroll tax that funds Social Security and Medicare, split between you and your employer on your wages.
- Social Security TaxA payroll tax on wages up to an annual limit that funds retirement, disability, and survivor benefits.
- Medicare TaxA payroll tax on all wages that helps fund hospital and medical coverage for people on Medicare.
- WithholdingMoney your employer takes out of each paycheck and sends to the government toward your expected tax bill.
- Self-Employment TaxThe Social Security and Medicare tax that self-employed people pay to cover both the employee and employer shares.
Frequently asked questions
What is FICA on my paycheck?
FICA is the payroll tax that funds Social Security and Medicare. For employees it totals 7.65% of wages — 6.2% for Social Security and 1.45% for Medicare — and your employer pays a matching 7.65% that does not appear on your stub.
Is payroll tax the same as income tax?
No. Payroll tax (FICA) funds Social Security and Medicare at fixed percentages. Income-tax withholding is a separate line that goes toward your yearly income tax bill and depends on your earnings and W-4 choices.
Do self-employed people pay payroll tax?
Yes, through self-employment tax. Because there is no employer to split the cost, they pay both the employee and employer shares, totaling 15.3% for Social Security and Medicare, though part of it is deductible.
Knowing what Payroll Tax means is knowledge — the first half. A brick gets placed when you act on it: read your pay stub to see how much FICA and withholding come out each period.
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Sources & references
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Plain-English education — not personalized legal, tax, or investment advice.