Your First Job's 401(k): A Beginner's Checklist

The first time HR hands you a 401(k) enrollment packet, it's tempting to skim it, pick whatever's pre-filled, and move on to the next form in the stack. Honestly, that's a completely normal instinct on your first week at a new job — there's a lot to process. But this is one of the few forms where five actual minutes of attention can be worth thousands of dollars over your career, so it's worth slowing down for.

Start with the match. Always.

Before anything else: does your employer match contributions? If so, put in at least enough to get the full match. Match formulas vary a lot by employer, so your plan's Summary Plan Description is where you'll find yours. Skipping this is basically turning down part of your compensation — I really can't overstate this one. It's about the closest thing to an instant return you'll find in your financial life (subject to your plan's vesting schedule, covered below).

Roth or Traditional — base it on your tax bracket, not a coin flip

If your plan offers both, you're really deciding between paying tax now (Roth) or later (Traditional). We've got a longer breakdown of this exact trade-off, but the short version: if you're early-career and likely in a lower bracket now than you'll be later, Roth often has the edge. If you're already in a high bracket, Traditional's upfront deduction is often worth more today.

Actually choose your investments

Here's the part that catches some people off guard: some plans — especially older ones, or ones without automatic enrollment — may park new contributions in a money-market or stable-value fund (or plain cash) until you pick something else yourself. Plans that auto-enroll you commonly default to a target-date fund instead, so check which one yours uses. If yours defaults to cash-like funds, it's possible to "enroll" and still not really be invested for growth — your money just sits there. If you don't want to think too hard about it, a target-date fund (the one labeled with a year close to when you'd retire) is a reasonable single-fund choice. It shifts its own mix of stocks and bonds as you get older, so you're not stuck rebalancing it yourself.

Look up the vesting schedule

Your own contributions are always 100% yours, no matter what. The employer match is a different story sometimes — it can vest gradually, meaning you only fully own it after a certain number of years at the company. Worth checking, especially if there's any chance you switch jobs in the next few years.

Set a beneficiary — takes thirty seconds, almost everyone skips it

Go back into the account portal after you enroll and actually fill this in. It feels unnecessary when you're 24 and just starting out. It's a small thing right up until it isn't.

Had a 401(k) at a previous job? It didn't disappear.

You can generally leave it where it is, roll it into your new employer's plan, or roll it into an IRA. Cashing it out is almost always the worst of the options on the table — you'll owe taxes on it, and likely a 10% early withdrawal penalty too (and if the check is made out to you, 20% is withheld for federal tax up front).

So how much should you actually contribute?

There's no single correct number here, and anyone who gives you one is oversimplifying. A common rule of thumb is to aim for somewhere around 10–15% of income toward retirement in total, employer match included — built up gradually as your income grows, not maxed out day one.

Run your own numbers

Once you know roughly what you're contributing (and what your employer's kicking in too), our retirement calculator has a dedicated field for the employer match, so you can see your own contribution and theirs combined, projected out to retirement age.

Sources

• 29 CFR 2550.404c-5, Qualified default investment alternatives (eCFR) — what counts as a default investment, and how target-date funds adjust over time
• IRS: Retirement topics — Vesting — your own contributions are always 100% vested; employer match vesting schedules
• IRS: Rollovers of retirement plan and IRA distributions — rolling an old 401(k) into a new plan or IRA, and what happens if you cash out
• IRS Topic No. 558: Additional tax on early distributions — the 10% additional tax before age 59½ and its exceptions

This article is for educational purposes only and is not financial advice.