The Anatomy of a Pay Stub
Most Americans glance at the net pay figure and move on. That's understandable — but the lines above it contain information that directly affects your taxes, retirement savings, and benefits. Knowing what each section means gives you the tools to catch errors, adjust withholding, and actually understand where your gross pay goes.
A typical pay stub is divided into three broad zones: earnings (what you made), deductions (what was taken out), and employer contributions (what your employer pays on your behalf, often invisible to you). Some stubs also show year-to-date (YTD) totals — the running sum of each line since January 1 of the current tax year. YTD figures are especially useful for verifying your W-2 at tax time. For a deeper look at how pay stub data connects to your annual tax forms, see our plain-language tax form reference.
Earnings: Gross Pay and Its Components
Gross pay is the starting number — your total earnings before anything is withheld. For salaried workers, it's your annual salary divided by the number of pay periods. For hourly workers, it's your rate multiplied by hours worked.
Common earnings lines you may see:
- Regular pay: Standard hours at your base rate.
- Overtime (OT): Hours beyond 40 in a workweek, typically at 1.5× your regular rate under the Fair Labor Standards Act. Your employer's specific policy may be more generous.
- PTO payout / Holiday pay: Compensated time off treated as regular income.
- Imputed income: The IRS-assigned dollar value of non-cash benefits — for example, employer-provided life insurance above $50,000, or a company car used for personal trips. It shows up in your earnings because it's taxable, even though no cash hits your bank account.
- Bonus / Commission: Variable pay, usually taxed at the IRS supplemental wage rate or aggregated with regular wages depending on your employer's payroll method.
Deductions: Taxes and Beyond
Deductions fall into two categories: mandatory (set by law) and voluntary (elected by you).
Mandatory Tax Withholding
- Federal income tax: Withheld based on your W-4 elections — filing status, dependents claimed, and any additional amounts you requested. If your withholding is off, you'll owe or get a refund at filing.
- State income tax: Varies by state; nine states currently have no income tax on wages.
- FICA — Social Security: 6.2% of wages up to the annual wage base (adjusted each year by the Social Security Administration). Funds Social Security retirement and disability benefits.
- FICA — Medicare: 1.45% of all wages, with an additional 0.9% once wages exceed $200,000 for single filers (per IRS rules). Funds Medicare hospital insurance.
- Local / city tax: Some cities and counties — including New York City and Philadelphia — levy their own income taxes, which appear as a separate line.
Voluntary Pre-Tax Deductions
These reduce your taxable gross, meaning you pay less in income tax now:
- 401(k) / 403(b) contributions: Retirement plan deferrals. The IRS sets annual contribution limits.
- Health insurance premiums: Your share of employer-sponsored coverage, typically deducted pre-tax under a Section 125 cafeteria plan.
- FSA / HSA contributions: Flexible spending accounts and health savings accounts, both pre-tax vehicles for qualified medical expenses.
- Dependent care FSA: Pre-tax dollars for eligible childcare or elder care expenses.
Post-Tax Deductions
- Roth 401(k) contributions: Unlike traditional deferrals, Roth contributions come out after tax — so qualified withdrawals in retirement are tax-free.
- Wage garnishments: Court-ordered deductions for child support, student loans, or judgments.
- Union dues / voluntary benefits: Life insurance, disability riders, or other elected add-ons funded post-tax.
Pre-Tax vs. Post-Tax: Why the Order Matters
Pre-tax deductions (like traditional 401(k) contributions or health premiums) lower your taxable income, so you save on income tax now. Post-tax deductions (like Roth 401(k) contributions) don't reduce today's tax bill, but may provide tax-free income later. Knowing which bucket each deduction falls into helps you plan more intentionally — and spot errors if a benefit is coded incorrectly.
Net Pay and What to Do With This Information
Net pay — sometimes labeled "take-home pay" — is what lands in your bank account after every deduction above. It's gross pay minus all mandatory taxes and voluntary elections.
A few practical moves once you understand your stub:
- Verify the math. Errors in payroll do happen. Cross-check hours, rates, and YTD totals periodically, especially after a raise, benefit change, or address update.
- Check your withholding. If you consistently get a large refund or owe a significant amount at tax time, your W-4 elections may need updating. The IRS Tax Withholding Estimator (available at irs.gov) can help you calibrate.
- Track your 401(k) contributions against the annual limit. Exceeding the IRS limit creates a tax headache that must be corrected before April 15.
- Use YTD figures to prepare for tax filing. Your YTD federal and state tax withheld columns should closely match box 2 and the equivalent state box on your W-2.
Understanding your pay stub is the first step toward a clear picture of your monthly cash flow. For guidance on what to do with your net pay once it's in your account, see where your money actually goes each month.
This article is for general informational and educational purposes only and does not constitute tax, legal, or financial advice. Tax rules and contribution limits change periodically; consult a qualified tax professional or financial adviser for guidance specific to your situation.