the first paycheck checklist that nobody gives you
HR hands you a stack of forms on day one. Nobody explains what actually matters. Here's the walkthrough I wish I'd had: direct deposit, the 401(k) match, HSA decisions, and the withholding check that saves you from a surprise tax bill.
Your first real job hands you a benefits packet on day one. Twenty pages of forms with acronyms you've never seen. HR says "just initial here and here" and you're supposed to know what you're doing. Nobody walks you through it. Nobody tells you which decisions matter now and which ones you can fix later.
Five things in that packet actually matter. The rest you can fix later or skip entirely. These five are the ones that cost real money if you get them wrong in month one.
get direct deposit right, or wait two weeks for a paper check
This one sounds obvious until you're the person who fat-fingered their routing number and had to wait three weeks for their first paycheck to clear. Direct deposit is how you get paid on payday. Without it, you're waiting for a physical check in the mail, then waiting for it to clear.
You need two numbers: your bank's routing number and your account number. Both are on a check if you have one, or you can pull them from your bank's app. Double-check the routing number. It's almost always nine digits, and if you transpose two of them, your paycheck goes nowhere.
Some companies let you split direct deposit across two accounts. I don't recommend it for your first paycheck. Get the full amount into one account, confirm it works, then adjust later if you want to automate savings.
the 401(k) match is the only part of your benefits packet you can't fix later
Most companies offer a 401(k) match. They'll put in money if you put in money, usually up to 3-6% of your salary. If your company matches 4% and you contribute 4%, that's free money. If you contribute zero, you get zero.
The catch: some companies make you opt in during your first 30 or 60 days. If you miss that window, you're locked out until the next enrollment period. Sometimes a full year. That's a year of match you just left on the table.
💡 The Justin Definition
401(k) match
The amount your employer contributes to your retirement account, conditional on you contributing first. People call it "free money." It isn't. It's deferred compensation that only shows up if you claim it. Miss the enrollment window and it's gone.
Contribute at least enough to get the full match. If your company matches up to 4%, contribute 4%. That's an instant 100% return on that portion of your paycheck. You will never beat that anywhere else.
If you're thinking "I can't afford to contribute right now," I get it. But run the math. A $60K salary with a 4% contribution is $200/month. Your take-home drops by maybe $150 after tax savings. That $150 becomes $300 in your 401(k) with the match. You're not losing $150. You're moving $300 into an account you'll need in 40 years.
the HSA decision: only worth it if you're actually healthy
If your company offers a High Deductible Health Plan with an HSA, HR will pitch it as a "triple tax advantage" account. They're not wrong. Contributions go in pre-tax. The balance grows tax-free. Spend it on medical stuff and it comes out tax-free too. It's the best tax deal in the code.
But the HDHP part means you're paying the first $1,500 to $3,000 of medical costs out of pocket before insurance kicks in. If you're 23, healthy, no prescriptions, no chronic conditions, that's probably fine. If you're managing anything that requires regular doctor visits or expensive meds, the HDHP will cost you more than the tax savings are worth.
The HSA itself is just a savings account for medical expenses. You can invest the balance once it hits a minimum (usually $1,000). If you're healthy and you max it out ($4,300 for 2025), it becomes a stealth retirement account. At 65 you can withdraw for anything, not just medical, and you only pay income tax like a traditional IRA.
For your first year, here's the default: if you're healthy and your company contributes to the HSA (some do), take the HDHP + HSA. If you have any ongoing medical costs or you're unsure, take the PPO. You can switch during next year's open enrollment.
withholding: the box that determines whether you owe money in april
When you fill out your W-4, you're telling your employer how much tax to withhold from each paycheck. Get it right and you break even at tax time. Get it wrong and you either owe a surprise $2,000 in April or you've been giving the government an interest-free loan all year.
The W-4 redesign in 2020 made this easier. The form asks about dependents and other income now, not "allowances." For most new grads, the default is simple: single, no dependents, one job. Check the box that says "single or married filing separately," leave everything else blank, sign it.
If you have a side gig or freelance income, you'll need to adjust. The IRS has a withholding calculator that's actually decent. Run it once in February after your first few paychecks and make sure you're not wildly under or over.
The goal is to owe less than $1,000 or get a refund less than $1,000. Anything bigger in either direction means your withholding is off.
the benefits you can skip on day one
Everything else in that packet (life insurance, disability, FSA, legal plans, pet insurance) you can ignore for now. Most of those elections can be changed during the next open enrollment period, and none of them have the same "miss the window, lose a year of value" stakes as the 401(k) match.
Life insurance through work is cheap, but if you're 23 with no dependents, you don't need it. Disability insurance matters more, but the default coverage is usually enough to start. FSAs are use-it-or-lose-it, and unless you have predictable medical expenses, you'll end up scrambling to spend $500 on contact lenses in December.
You can revisit all of this next year. The 401(k) match and the W-4 are the only two that cost you real money if you get them wrong in month one.
what I actually did with my first paycheck setup
For reference: I took the PPO, maxed the 401(k) match at 4%, skipped the HSA because I didn't know what I was doing yet, and set my W-4 to single with no adjustments. First paycheck cleared, withholding was close enough, and I got a $300 refund that April. Not optimal, but I didn't leave money on the table and I didn't owe a surprise bill.
The next year I switched to the HDHP + HSA once I understood the math. I adjusted my W-4 after running the IRS calculator. But the first year, the goal was just to not screw up the irreversible parts.
Here's the thing I tell every 22-year-old who texts me their HR packet: get the match, then fix the rest later. Day one isn't your last chance to be smart about money. Most of these decisions have a do-over button — the 401(k) match and the W-4 don't. Get those right and you've already won the part that's hardest to fix.