Your Pay Stub Has a Lot of Numbers. Here's What Every Single One Means.

If you've worked a job in the last few decades, you've received hundreds of pay stubs. But if someone asked you right now to explain every line on one, could you? Most people can't — and that's not a personal failing. Pay stubs were designed for payroll departments, not for the people actually receiving them. They pack a lot of abbreviations, codes, and numbers into a small space and assume you already know what everything means. You don't have to just accept that confusion.

Start with the two numbers that matter most

Every pay stub, no matter how complicated it looks, tells one central story: what you earned, and what you actually received. Your gross pay is what you earned before anything was taken out. Your net pay — sometimes printed at the bottom, sometimes labeled "amount deposited" — is what went into your bank account. Everything in between those two numbers is money that was taken out for one reason or another. Understanding where that difference goes is the entire purpose of reading a pay stub.

Federal income tax withholding

This line shows how much was sent to the federal government toward your annual income tax. The word "withholding" just means your employer took it out before paying you. Think of it like paying your tax bill in small installments throughout the year rather than one large payment in April. How much gets withheld depends on a form you filled out when you were hired called a W-4. If you claimed more allowances, less gets withheld. If you claimed fewer, more gets withheld. Neither is wrong — it just affects whether you get a refund or owe money when you file your taxes.

FICA — the two lines almost everyone ignores

FICA stands for Federal Insurance Contributions Act, which is a formal way of saying Social Security and Medicare. These two lines on your pay stub are contributions to programs you'll use later in life. Social Security currently takes 6.2% of your gross pay up to an annual limit. Medicare takes 1.45% with no cap. Unlike federal income tax, you cannot change these amounts. They are fixed by law for everyone.

State and local taxes

Depending on where you live, you may see one or two more tax lines. State income tax varies widely — some states like Texas and Florida have none at all, while others like California and New York take a meaningful percentage. Local taxes are less common but do exist in certain cities and counties. If you've moved to a new state recently and the amount looks different from your old job, that's why.

Deductions — the voluntary ones

Below the tax lines you'll often see deductions for things you chose to participate in. Health insurance is the most common — this is your share of the monthly premium for whatever health plan you enrolled in. Dental and vision may appear separately. A 401(k) or retirement plan contribution will show up here too if you're contributing to a workplace retirement account. These deductions are often taken out before your income is taxed, which actually reduces how much tax you owe — a small benefit worth knowing about.

The YTD column

YTD stands for Year to Date. Most pay stubs show two columns: what was taken out this pay period, and the running total since January 1st. The YTD column is useful at tax time for double-checking that your W2 form matches your records, and for making sure your 401(k) contributions haven't accidentally exceeded the annual legal limit.

What to actually check each time

You don't need to study your pay stub like a textbook every two weeks. But it's worth a 30-second scan to confirm that your gross pay matches what you expected to earn, that deductions for insurance or retirement are the amounts you signed up for, and that nothing new appeared on the deductions list without explanation. Mistakes do happen in payroll — and the only way to catch them is to look.

At tax time, your employer summarizes the year on a W-2—see our W-2 form guide for every box explained.

If you've gone through this and your pay stub still has lines you can't identify, you're not alone. At ReadMyPay.com, you can upload your document and get a plain English explanation of every single line — privately, with nothing stored or saved. It's built for exactly this situation.