You worked the hours. You know what your rate is. And yet the number that hits your bank account never quite matches the math you did in your head. If you’ve ever stared at a pay stub trying to figure out where a chunk of your check went, you’re not alone — and you’re not wrong to want a real answer instead of “that’s just how it works.”

Here’s a plain-English walkthrough of what’s actually happening on that stub, whether you’re working union or non-union.

Start With Gross vs. Net — the Two Numbers That Confuse Everyone

Your gross pay is what you earned before anything comes out: hours worked times your rate, plus overtime, plus any bonuses or per diem. Your net pay — what actually lands in your account — is gross pay minus every deduction on the stub. The gap between those two numbers is where all the confusion lives, so the fastest way to stop being surprised by your check is to know exactly what’s sitting in that gap.

Taxes: The Deductions Everyone Has

Federal income tax and, in most states, state income tax get withheld based on the W-4 you filled out when you were hired. If you’ve had a big life change — new dependent, second job, marriage — and haven’t updated your W-4, your withholding might not match your actual situation anymore, which is worth fixing rather than living with a surprise at tax time.

FICA taxes — Social Security and Medicare — are a flat percentage that comes out no matter what, and your employer matches it. This one isn’t adjustable; it’s built into every paycheck in the country.

Per Diem: Why It Sometimes Isn’t Taxed

If you travel for work, per diem — a daily allowance for meals, lodging, or incidentals — can be non-taxable, but only under specific conditions: it has to be for travel away from your regular work area, and it generally can’t exceed federal per diem rate limits for the area you’re working in. If your per diem is showing up as taxed income on your stub, it usually means it’s being treated as a flat allowance rather than a qualifying reimbursement, or it’s exceeding the non-taxable limit. This is worth asking your payroll department about directly, since the answer depends on how your specific employer structures it — it’s not a one-size-fits-all rule.

Union Dues and Benefits: What’s Actually Buying You Something

If you’re in a union, dues typically come out as either a flat amount or a percentage of your check, and they fund the things your local negotiates on your behalf — wage scales, grievance representation, apprenticeship programs, and often your health and pension benefits. It’s easy to look at a dues line item as pure cost, but it’s worth remembering what it’s actually purchasing: bargaining power you wouldn’t have negotiating alone.

Health insurance premiums, whether union or employer-sponsored, are usually a fixed per-pay-period amount. Retirement contributions — a 401(k), a union pension fund, or both — might be a percentage you chose, or in some union agreements, a contribution your employer makes on your behalf that shows up as a line item even though it doesn’t reduce your take-home pay.

Overtime: The Rule Most Workers Get Wrong

Federal law generally requires overtime pay — 1.5x your regular rate — for hours worked beyond 40 in a workweek. The part that trips people up: it’s 40 hours in a single workweek, not 8 hours in a single day, unless your state has its own daily overtime rule (a handful do). Worked a 10-hour day but only 36 hours for the week? No overtime is owed under federal law, even though that one day felt long. Worked 45 hours across a normal five-day week? Those last 5 hours should be paid at time-and-a-half, regardless of how the days were split up.

Prevailing wage jobs and union contracts sometimes have their own overtime rules layered on top of federal law, so if you’re working under a specific agreement, that contract language governs, not just the general federal rule.

A Quick Way to Check Your Own Stub

Next time you get paid, pull up your stub and trace the math:

1. Confirm gross pay matches your hours and rate, including any overtime calculated correctly
2. Check that per diem, if you get it, is being categorized the way you expect
3. Add up the deductions and confirm they match what you signed up for at onboarding — nothing should be a surprise
4. If dues or benefit contributions changed, check whether your union or employer sent a notice you might have missed

If something doesn’t add up after that walkthrough, ask your payroll contact directly. Pay stub errors happen more often than people assume, and catching one early is a lot easier than untangling it months later.

Why This Connects to More Than Just Your Wallet

Financial stress doesn’t stay contained to your bank account — it follows you onto the job site, and it’s been linked to slower reaction times and more distraction-related incidents. Understanding exactly where your money is going is one of the more overlooked ways to reduce that stress, alongside the seasonal budgeting habits that come with variable trades income. If you haven’t seen it yet, our piece on seasonal income budgeting for construction workers is a good next read for building that out further.

Once you know exactly what’s coming out of your check, the next step is deciding what to do with what’s left. Our Budgeting 101: From Paycheck to Freedom course picks up right where this post leaves off.