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SEO Meta Description (138 characters): Learn how to read a pay stub and finally understand every deduction — from FICA to 401(k) — so you always know exactly where your money goes.

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How to Read a Pay Stub (And What All Those Deductions Actually Mean)

How to read a pay stub is one of those things nobody ever formally teaches you. You start your first job, you get your first paycheck, and somewhere between "gross pay" and "net pay," a chunk of your money quietly disappears. Nobody hands you a guide. You just sort of squint at the numbers and hope for the best.

But here's the thing: your pay stub is one of the most important financial documents you will regularly encounter. It tells you how much you earned, how much the government took, what your employer deducted for benefits, and — maybe most importantly — whether any of those numbers are actually wrong. Payroll errors are more common than people realize, and the only way to catch them is to understand what you're looking at.

This guide is going to walk you through every section of a typical pay stub, break down each paycheck deduction in plain language, and help you figure out why your take-home pay is lower than your salary. Whether you're reading your first stub or you've been ignoring this document for years, by the end of this article you'll know exactly what every line means.

How to Read a Pay Stub: The Basic Structure

Before we get into individual deductions, it helps to understand how a pay stub is organized. Most stubs follow a similar layout, whether they're printed on paper or available through an online payroll portal.

At the top, you'll usually find your personal and employer information: your name, address, employee ID, your company's name, and your pay period dates. Always check that this section is accurate. A wrong address or employee ID might seem minor, but it can cause headaches at tax time.

Below that, most pay stubs are divided into three core sections:

• Earnings — what you made
• Deductions — what was taken out
• Net Pay — what you actually received

Let's go through each of those in detail.

Gross Pay vs. Net Pay: Why They're Never the Same

The single most confusing thing for most people is the difference between gross pay and net pay.

Gross pay is your total earnings before anything is taken out. If your salary is $60,000 a year and you're paid bi-weekly, your gross pay each period is $2,307.69. That's the number your employment contract refers to.

Net pay — sometimes called take-home pay — is what actually lands in your bank account after all taxes and deductions are removed. For most people, net pay is noticeably less than gross pay, and the gap between the two can feel surprising until you understand where the money goes.

The formula is simple:

Gross Pay − Taxes − Pre-Tax Deductions − Post-Tax Deductions = Net Pay

Understanding the Taxes on Your Pay Stub

This is where most of the money goes. Taxes are mandatory and non-negotiable — your employer is legally required to withhold them on your behalf and send them to the government.

Federal Income Tax (FIT)

Federal income tax is the biggest line item on most pay stubs. The amount withheld depends on two things: how much you earn and how you filled out your Form W-4 when you started your job.

The W-4 tells your employer how much federal tax to withhold. If you claimed more allowances (or under the newer W-4 format, specified certain adjustments), less gets withheld. If you claimed zero or added extra withholding, more comes out each check.

Getting this wrong in either direction causes problems. Withhold too little and you'll owe a tax bill in April. Withhold too much and you're essentially giving the IRS an interest-free loan. The IRS Tax Withholding Estimator is a free tool that can help you check whether your W-4 is set up correctly.

FICA Taxes: Social Security and Medicare

FICA stands for the Federal Insurance Contributions Act. It covers two separate taxes that fund two separate programs.

Social Security tax is currently 6.2% of your gross wages, up to an annual wage cap. For 2026, that cap is $176,100. Once your earnings hit that ceiling for the year, Social Security withholding stops for the rest of the year — which is why some people notice a bump in their take-home pay late in the year.

Medicare tax is 1.45% of all wages with no annual cap. If you earn more than $200,000 as a single filer (or $250,000 for married filing jointly), an additional 0.9% Medicare surtax kicks in.

Your employer also pays a matching 6.2% for Social Security and 1.45% for Medicare on your behalf — money that never appears on your stub because it comes directly from the business, not your paycheck.

State and Local Income Tax (SIT)

Depending on where you live, you may also see state income tax withheld. Nine states have no state income tax at all (including Texas, Florida, and Nevada), while others have rates that range from under 3% to over 13%. A few cities and counties also impose local income taxes, which can appear as a separate line on your stub.

Pre-Tax Deductions: The Ones That Actually Help You

Not every deduction is purely money leaving your pocket. Pre-tax deductions are taken from your gross pay before federal and state taxes are calculated, which means they reduce your taxable income. This is actually a benefit — you pay less in taxes because a portion of your earnings is shielded from taxation.

401(k) and Retirement Contributions

If your employer offers a 401(k) plan and you're contributing to it, those contributions come out pre-tax. For 2026, the IRS contribution limit is $23,500 for employees under 50. Your stub will typically show this as "401K," "RET," or something similar.

If your employer offers a Roth 401(k), contributions come out after tax, so they won't reduce your taxable income now — but qualified withdrawals in retirement are tax-free.

Health Insurance Premiums

Your share of employer-sponsored health insurance premiums is usually deducted pre-tax through a Section 125 cafeteria plan. This covers medical, dental, and vision coverage. The exact amount depends on the plan you selected and how much your employer covers.

Flexible Spending Accounts (FSA) and Health Savings Accounts (HSA)

Both FSAs and HSAs allow you to contribute pre-tax dollars for qualified medical expenses. An HSA requires enrollment in a high-deductible health plan (HDHP) and offers the added benefit of rolling over unused funds year to year. An FSA has a "use it or lose it" rule — most plans require you to spend the balance by year-end.

Dependent Care FSA

If you pay for childcare or adult dependent care, a Dependent Care FSA lets you contribute up to $5,000 pre-tax per household per year to cover those costs.

Post-Tax Deductions: The Ones That Come Out After Taxes

Post-tax deductions are taken after your taxes are calculated, so they don't reduce your taxable income. They still reduce your net pay, though, so it's worth knowing what you're paying for.

Common post-tax deductions include:

• Life insurance premiums above $50,000 in coverage
• Roth 401(k) contributions
• Union dues, if you're a member of a labor union
• Wage garnishments (court-ordered deductions for child support, debt repayment, etc.)
• Charitable contributions made through payroll deduction
• Supplemental insurance such as disability, accident, or critical illness policies

Decoding Common Pay Stub Abbreviations

Pay stubs love abbreviations. If you've ever stared at a line labeled "MED" or "FED WT" and had no idea what it meant, here's a quick reference:

Abbreviation	Meaning
FIT / FED WT	Federal Income Tax
SIT / ST WT	State Income Tax
SS / OASDI	Social Security (Old Age, Survivors, and Disability Insurance)
MED / MEDIC	Medicare
401K / RET	Retirement Contribution
HSA	Health Savings Account
FSA	Flexible Spending Account
YTD	Year-to-Date
GTL	Group Term Life Insurance

If you see an abbreviation on your stub that's not on this list, your HR or payroll department should be able to explain it. Don't be shy about asking — it's your money.

What "Year-to-Date" (YTD) Actually Means

Most pay stubs include a year-to-date (YTD) column alongside the current pay period amounts. The YTD figures show how much has been earned or deducted in total since January 1st of the current calendar year.

This column is genuinely useful. It lets you:

• Track how close you are to the Social Security wage cap
• Verify your total federal and state taxes paid before filing your return
• Confirm that your retirement contributions are on track toward your annual goal
• Catch any deductions that may have been applied incorrectly over multiple pay periods

At the end of the year, your YTD figures on your final pay stub should closely match what shows up on your W-2 form. If they don't, contact your payroll department before filing your taxes.

How to Spot Errors on Your Pay Stub

Payroll mistakes happen. According to the American Payroll Association, error rates in payroll can be significant, and the most common issues include incorrect hours recorded, wrong deduction amounts, and outdated tax withholding settings. Here's what to check every pay period:

1. Verify your hours — if you're hourly, make sure the hours listed match what you actually worked.
2. Check your deduction amounts — if a deduction changed or a new one appeared, make sure you understand why.
3. Confirm your tax withholding — if your W-4 information changed, your withholding should reflect that.
4. Review YTD totals — large discrepancies between expected and actual YTD totals are a red flag.
5. Look for duplicate deductions — occasionally the same deduction gets applied twice in a period.

If you find an error, document it in writing and report it to your payroll or HR department immediately. The sooner it's caught, the easier it is to fix.

How Pre-Tax vs. Post-Tax Deductions Affect Your Actual Tax Bill

Here's something worth understanding because it has real money implications. Every dollar you contribute to a pre-tax benefit — your 401(k), your FSA, your health insurance premium — lowers your taxable income. That means less federal and state tax is withheld, so your take-home pay isn't reduced dollar-for-dollar.

For example, if you contribute $200 per paycheck to a 401(k) and you're in the 22% federal tax bracket, your take-home pay only goes down by about $156. The other $44 essentially comes from tax savings. That's one of the most underappreciated benefits of tax-advantaged workplace accounts.

This is why financial advisors generally recommend maxing out pre-tax retirement and health accounts before putting money into a regular savings account — the tax efficiency is significant.

Conclusion

How to read a pay stub isn't complicated once you know what you're looking at. Your gross pay is what you earned, your net pay is what you keep, and everything in between is a combination of mandatory taxes — federal income tax, Social Security, and Medicare — and voluntary or employer-sponsored deductions like health insurance, 401(k) contributions, and FSAs. Pre-tax deductions lower your taxable income and are generally worth taking advantage of, while post-tax deductions come out after taxes are calculated. The YTD column is your running total for the year and a valuable cross-check tool come tax season. Get in the habit of reviewing your pay stub every pay period, because catching a payroll error early is always better than trying to sort it out months later — and understanding where your money goes is the first step toward making smarter decisions with it.