Roth IRA vs. 401(k): Which Should a 20-Something Max Out First?

If your job offers a 401(k) and you’ve heard a Roth IRA is great for young people, you’re probably stuck on one question: which one do I put money into first?

You don’t have to pick just one — most people should use both. But the order you fund them in matters, because one specific step comes before everything else.

The Short Answer (The Order Matters)

1. Contribute enough to your 401(k) to get the full employer match.
2. Then fund a Roth IRA.
3. Then go back to the 401(k) if you still have money left to invest.

Here’s why that order works.

Step 1: Always Get the Full Match First

If your employer matches part of your 401(k) contribution, that match is an instant 100% return on that money. Nothing else in investing beats free money.

If your job matches 50% of the first 6% you contribute, contributing that 6% is non-negotiable step one — do it before a Roth IRA, before extra debt payments beyond minimums, before almost anything. Skipping it is literally leaving part of your paycheck on the table.

New to how the match works? Read What Is a 401k Employer Match and How Does It Work first.

Step 2: Then the Roth IRA

After the match is secured, a Roth IRA is usually the better next dollar for someone in their 20s. Three reasons:

You’re probably in the lowest tax bracket of your life. A Roth IRA is funded with money you’ve already paid tax on, and then it grows and comes out tax-free in retirement. Paying tax now, while your income (and tax rate) is relatively low, to never pay tax on decades of growth is a great trade.

You control the investments. A 401(k) gives you a short menu chosen by your employer. A Roth IRA at a brokerage lets you pick from basically everything — like the low-cost index funds most beginners should be using anyway.

Flexibility. You can withdraw your contributions (not earnings) from a Roth IRA without taxes or penalties if life goes sideways. That’s not a license to raid your retirement — but for a 20-something whose life is still taking shape, that safety valve is genuinely valuable.

Full explainer here: What Is a Roth IRA and How Does It Work (Explained Simply).

Step 3: Back to the 401(k)

Maxed the Roth IRA for the year and still have money to invest? Go back and raise your 401(k) contribution. The 401(k) has a much higher annual limit than an IRA, so it’s where bigger savers finish the job.

When the Order Changes

The order above assumes a typical 20-something situation. It can flip when:

• Your 401(k) has terrible, expensive funds and no match. A bad menu with high fees can make the Roth IRA the better first stop after all (still get any match first — a match beats bad fees).
• You have a Roth 401(k) option. Many plans now offer one. It combines the 401(k)’s higher limit with Roth tax treatment, which can simplify things — but you lose the Roth IRA’s flexibility and investment freedom.
• You’re earning unusually well for your age. If you’re already in a high tax bracket, a traditional 401(k)’s tax break today becomes more valuable, and the math gets closer.

FAQ

Can I have a 401(k) and a Roth IRA at the same time?

Yes — and most people saving seriously do. There’s no rule against having both. The IRS limits how much you can put into each per year (the IRA limit is a few thousand dollars; the 401(k) limit is much higher), but having both accounts is completely normal.

What if my job doesn’t offer a 401(k)?

Then the Roth IRA is your step one. Open one at a low-cost brokerage and start contributing what you can. Not having a workplace plan isn’t a reason to wait.

Should I ever skip the match to fund a Roth IRA instead?

Almost never. A 100% instant return from the match beats the Roth IRA’s tax advantages in nearly every realistic scenario. Get the match first, then Roth.

The Bottom Line

Match first, Roth IRA second, then back to the 401(k). That one ordering decision — made once, in your 20s — can be worth tens of thousands of dollars by retirement, because it captures the free money, locks in your lowest-ever tax rate, and keeps your options open while your career is still forming.

This article is for education only and is not financial advice.