Your first paycheck explained: where every dollar actually went

You agreed to a salary, you did the division, and the number that landed is nowhere near it. That gap is normal, and once you can read a pay stub it stops being mysterious.

Here’s a full stub for someone earning $48,000 a year, paid every two weeks, contributing 5% to a 401(k) and paying for health insurance through work. Every figure uses 2026 rules.

About 71% of the headline number reaches the bank. Working through each line explains where the other 29% went and, more usefully, which parts you can change.

Gross pay is not what you agreed to per paycheck

$48,000 divided by 26 pay periods is $1,846.15, not $2,000. Biweekly pay means 26 checks a year, not 24, so each one is smaller than a monthly-thinking brain expects. Twice a year you get three paychecks in a month, which is where the extra two come back.

If you’re paid semi-monthly instead, on the 15th and the last day, you get 24 checks of $2,000. Same annual money, different rhythm, and worth knowing which one you’re on before you set up automatic bill payments.

Pre-tax deductions come out first, and that’s good news

The health insurance premium and the 401(k) contribution are subtracted before taxes are calculated. That ordering matters more than most people realize.

The $120 health premium comes out under a Section 125 plan, which means it escapes federal income tax, Social Security, and Medicare. Notice the Social Security line in the table: it’s 6.2% of $1,726.15, not of $1,846.15, because the premium was removed from the base first. Employer-sponsored insurance is subsidized twice, once by your employer’s contribution and once by the tax code.

The $92.31 going into the 401(k) works differently. It escapes income tax but not FICA. Social Security and Medicare are still calculated on the full amount including your contribution, which is why the 401(k) line doesn’t reduce those numbers at all. This trips up a lot of people who expect a 401(k) contribution to cut every tax.

The practical consequence: contributing $92.31 doesn’t cost you $92.31 in take-home pay. It costs about $81, because the contribution reduces your federal income tax by roughly $11. You’re moving 92 dollars into your own account and only feeling 81 of it. If your employer matches, the real math is better still.

Social Security and Medicare, the two lines you can’t change

These are FICA, and they’re the most inflexible part of the stub. No filing status, no W-4, no deduction affects them.

Social Security takes 6.2% of your wages up to a ceiling of $184,500 in 2026. Once your year-to-date pay with one employer crosses that number, the deduction stops for the rest of the calendar year and restarts in January. Almost nobody in their first job will hit it.

Medicare takes 1.45% with no ceiling at all, on every dollar you earn forever. An additional 0.9% kicks in above $200,000 for single filers, which is a problem for later.

Your employer pays an identical 6.2% and 1.45% on top of your wages, so the true contribution is 15.3% of your pay. Economists generally argue the employer half is money that would otherwise have gone into your salary. Whether or not you buy that, it’s worth knowing it exists.

What you get: this is not a savings account with your name on it. Your payroll taxes fund current retirees and disability recipients, and your earnings record builds your own future benefit. You need 40 quarters, about ten years of work, to qualify for retirement benefits at all. Your first paycheck bought you one of them.

Federal income tax, and why your bracket isn’t your rate

The $112.22 is an estimate your employer makes based on the W-4 you filled out on day one. It isn’t your actual tax. Your actual tax gets settled when you file, and the difference is your refund or your bill.

Here’s the calculation behind it. Annual taxable income after the 401(k) and health premium is about $42,480. Subtract the 2026 standard deduction of $16,100 and you’re taxing $26,380. The first $12,400 is taxed at 10%, and the rest at 12%. Total federal tax for the year: about $2,918.

That’s an effective rate of roughly 6% of gross pay, even though this person is “in the 12% bracket.” Brackets are marginal. The 12% applies only to the dollars above $12,400 of taxable income, never to the whole thing. This is the single most misunderstood idea in personal tax, and it’s why a raise can never leave you with less money.

If you earn tips or FLSA overtime, there’s a temporary deduction available for tax years 2025 through 2028, capped at $25,000 for qualified tips and $12,500 for the overtime premium portion. Two things to know: it’s an income tax deduction claimed on your return, not something removed from your paycheck, and it doesn’t reduce FICA at all. The 2026 W-4 has lines in the Deductions Worksheet where you can account for it if you’d rather have the money during the year than as a refund.

State and local tax, the most variable line

The $77.68 in the example is illustrative, because this line swings more than any other.

Nine states have no wage income tax at all: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. Others run flat rates in the 3% to 5% range, and a few reach into the 9% to 13% territory at higher incomes.

Then there’s local tax. Some cities and school districts levy their own income tax on top, and a few states have separate lines for disability or paid family leave insurance. If you see an acronym on your stub you don’t recognize, it’s usually one of these, and your payroll department can name it.

The part of your compensation you never see

Your employer’s cost to employ you is meaningfully higher than your salary. On this paycheck they’re paying $132.05 in matching FICA, plus federal and state unemployment insurance, workers’ compensation, and whatever they contribute toward your health premium, which nationally averages more than $6,000 a year for individual coverage.

None of this appears on your stub. It’s the reason “total compensation” and “salary” are different numbers, and the reason a $5,000 raise costs your employer more than $5,000.

Three surprises that catch people out

Your first check is often partial. If you started mid-period, you were paid for the days you worked, not the full two weeks. Don’t budget from it.

Bonuses are withheld at a flat 22%. When a bonus is paid separately from regular wages, employers generally withhold 22% federal, regardless of your actual bracket. If your real rate is 12%, you’re over-withheld and you’ll get it back at filing. It isn’t a special bonus tax.

Your W-4 was a guess. You filled it out before you knew anything, and most people never touch it again. If you got a huge refund last year, you lent the government money interest-free for twelve months. If you owed, you under-withheld. The IRS Withholding Estimator takes about fifteen minutes and you can submit a new W-4 to payroll any time, as many times as you want.

What to actually do with this

Read your first three stubs line by line and confirm each deduction is something you recognize and agreed to. Payroll errors happen, and unfamiliar acronyms are worth one email.

Check the year-to-date column, not just the current period. It’s the fastest way to spot something that’s been wrong since day one.

Then check whether you’re getting the full employer 401(k) match, because that’s the one line on this entire stub where a small change is worth a very large amount of money later. Everything else here is fixed, estimated, or reconciled at tax time. The match is the part you can simply take.