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How to Read a Pay Stub: Line-by-Line Deductions Explained

Last updated: October 15, 2026

A pay stub looks like alphabet soup until someone walks you through it. Here's every section, top to bottom — using a sample biweekly stub for an employee earning $25/hour over 80 hours.

The three big sections

Every stub has the same skeleton: 1) Earnings — what you made (gross). 2) Deductions & taxes — what came out. 3) Net pay & YTD — what you keep, plus running totals. Understand those three and you understand the stub.

Section 1 — Earnings (gross pay)

Gross pay is the headline number: everything earned before deductions. For our sample employee: 80 hours × $25 = $2,000.00 gross. This section also lists overtime (hours at 1.5× your rate), bonuses, and commissions when they apply. Every line below is subtracted from this number.

Section 2 — Deductions and taxes

Listed one line at a time, usually in three groups:

Pre-tax deductions

401(k) contributions, health insurance premiums, HSA contributions. These come out before income tax is figured, which lowers your taxable income. (Sample: 5% 401(k) = $100.00.)

Tax withholdings

Federal income tax (based on your W-4), state income tax (varies by state), Social Security at 6.2% on wages up to $184,500 (2026), and Medicare at 1.45% on all wages plus 0.9% on wages over $200,000. These aren't optional — your employer is required to withhold them.

Post-tax deductions

Roth 401(k) contributions, union dues, wage garnishments. These come out after taxes and don't reduce your taxable income.

Section 3 — Net pay and YTD

Net pay is the bottom line: gross minus every deduction above — it's what hits your bank account. Next to it, the YTD column shows running totals since January 1: YTD gross, YTD federal tax, YTD net, and so on. Glance at YTD whenever a number looks off; it's the fastest way to spot a payroll error.

A 60-second stub checkup (do this every payday)

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Frequently asked questions

What is gross pay vs. net pay?

Gross pay is everything you earned in the period before anything is taken out — hourly wages times hours, salary, overtime, bonuses. Net pay (take-home pay) is what remains after all taxes and deductions. Gross minus deductions equals net.

Why was more tax withheld from my bonus?

Bonuses are “supplemental wages,” and employers usually withhold federal tax from them at a flat 22% — which can look higher than your normal paycheck withholding. It's just withholding, not extra tax: the real tax is reconciled when you file your return, and any over-withholding comes back as a refund.

What does YTD mean on a pay stub?

Year-to-date: the running total from January 1 through the current pay period. YTD gross, YTD taxes, and YTD net let you verify the math adds up at a glance — and they give you the numbers you'll need at tax time.

Why do I pay Social Security tax?

The 6.2% Social Security (OASDI) tax funds retirement, survivors, and disability benefits. In 2026 it applies to the first $184,500 of wages; earnings above that aren't subject to it. Your employer matches it with another 6.2% out of their own pocket.

What's the difference between pre-tax and post-tax deductions?

Pre-tax deductions — like traditional 401(k) contributions and health premiums — come out before income tax is calculated, lowering your taxable income now. Post-tax deductions — like Roth 401(k) contributions — come out after taxes, so they don't reduce this year's taxable income.

How do I check my pay stub for errors?

Multiply your hours by your rate and compare to gross; confirm overtime was paid at 1.5 times your rate; check that YTD figures equal the sum of your prior stubs; and verify each deduction matches what you elected. Catch a mismatch early — payroll can fix the current year far more easily than a prior one.

Related guides

Sample documents for personal record-keeping. Not tax advice — verify calculations with your payroll provider or tax professional.