401(k) vs Roth IRA vs Traditional IRA: Which Should You Choose?

Three accounts, three different tax deals. Here's how to figure out which one deserves your next dollar.

A 401(k), a Roth IRA, and a traditional IRA all do the same basic job — they let you invest for retirement with a tax advantage — but each one structures that advantage differently. The right choice (or combination) depends less on which account is "best" and more on your current tax bracket, your employer's match, and how much control you want over your investments.

1. The core difference: when you pay tax

A traditional 401(k) and a traditional IRA both use pre-tax dollars — your contribution reduces your taxable income this year, and you pay ordinary income tax when you withdraw in retirement. A Roth IRA (and a Roth 401(k), where offered) flips this: you contribute after-tax dollars now, get no upfront deduction, but withdraw the growth completely tax-free in retirement, provided you meet the holding-period rules.

The core decision this creates: would you rather pay tax on the seed (Roth) or the harvest (traditional)? If you expect to be in a similar or higher tax bracket in retirement, Roth tends to win. If you expect a meaningfully lower bracket in retirement, traditional tends to win.

2. 2026 contribution limits at a glance

Ages 60–63 get an even higher 401(k) catch-up of $11,250 instead of $8,000, for a total of $35,750. The IRA limit is shared across traditional and Roth combined — you can split it however you like, but the total can't exceed $7,500 (or $8,600 with catch-up).

3. Who can actually contribute to each account

A 401(k) requires an employer that offers one — you can't open your own outside of self-employment plans. A traditional IRA has no income limit on contributing, though your ability to deduct the contribution phases out if you (or your spouse) have a workplace plan and your income is above certain thresholds.

A Roth IRA has a hard income ceiling on direct contributions. For 2026, the phase-out is $153,000–$168,000 for single filers and $242,000–$252,000 for married couples filing jointly. Above that, direct Roth contributions aren't allowed, though a "backdoor Roth" conversion is a common workaround worth discussing with a tax professional.

4. The employer match changes the math

If your employer matches 401(k) contributions — commonly 50¢–$1 for every dollar you contribute, up to some percentage of your pay — that match is an immediate, guaranteed return that neither a traditional nor a Roth IRA can offer. Capturing the full match should almost always come before funding an IRA, since walking away from a match is walking away from free money.

5. A simple order of operations

1. Contribute enough to your 401(k) to get the full employer match. This step comes first regardless of tax bracket.
2. Max out an IRA (traditional or Roth, based on your tax situation and eligibility). IRAs typically offer far more investment choices than a workplace 401(k) menu.
3. Go back and max out your 401(k) further if you still have money to invest and want the higher combined limit.

This order isn't universal — if your 401(k) has notably better fund options than an average IRA, or you're chasing a Roth conversion strategy, the order can shift. But it's the right default for most people.

6. When traditional beats Roth (and vice versa)

Traditional tends to win when: you're in a high tax bracket now and expect a lower one in retirement, you want to lower your taxable income this year for other reasons (like staying under an income threshold), or you're early in a high-earning career with a clear path to a lower-spending retirement.

Roth tends to win when: you're early in your career and in a low tax bracket now, you expect tax rates in general to rise before you retire, or you want to avoid required minimum distributions later — Roth IRAs are not subject to RMDs during the original owner's lifetime, unlike traditional IRAs and 401(k)s.

7. You don't have to choose just one

Many people hold a 401(k) and both types of IRA simultaneously, using each for a different purpose — pre-tax 401(k) contributions to lower current taxable income, Roth IRA contributions for tax-free growth, and occasional traditional IRA contributions when income limits or deduction eligibility make sense. Diversifying your tax treatment across accounts gives you more flexibility to manage your tax bracket in retirement, since you can choose which account to withdraw from based on your income needs that year.

8. Start with what compounding actually does for you

Whichever account (or combination) you choose, the account type matters less than starting consistently and letting compound growth do the work over decades. See our explainer on how compound interest works for the underlying math behind why starting early outweighs almost any other retirement decision.

9. Want the full rules for each account?

This guide covers the decision framework, but each account has its own detailed rules worth knowing well. See our complete guides to how a 401(k) works — including vesting, employer matching, and what happens when you change jobs — and how a Roth IRA works, including the 5-year rule and the backdoor Roth strategy for high earners.

The honest answer depends on a number nobody can know for sure

Traditional vs. Roth ultimately comes down to whether your tax rate will be higher or lower in retirement than it is now — and nobody can predict future tax policy or your own future income with real confidence. Rather than trying to guess correctly, many people split contributions between both types precisely to hedge against being wrong about which direction tax rates move.

Frequently Asked Questions

Can I contribute to a 401(k) and an IRA in the same year?

Yes. The two limits are separate. In 2026 you can contribute up to $24,500 to a 401(k) and up to $7,500 to an IRA (traditional, Roth, or split between both) in the same year, as long as you meet any applicable income limits for the IRA type.

What is the income limit for contributing to a Roth IRA in 2026?

For 2026, the ability to contribute directly to a Roth IRA phases out between $153,000 and $168,000 of income for single filers, and between $242,000 and $252,000 for married couples filing jointly. Above the top of the range, you cannot contribute directly, though a backdoor Roth conversion may still be an option.

Should I prioritize my 401(k) or my IRA first?

Generally, contribute enough to your 401(k) to get the full employer match first — that's an immediate 50-100% return that no IRA can match. After capturing the full match, many people then max out an IRA for its wider investment choices before returning to max out the 401(k) further.

Can I have a 401(k), a traditional IRA, and a Roth IRA all at once?

Yes, there's no rule against holding all three. The IRA contribution limit is shared across traditional and Roth IRAs combined, but your 401(k) limit is entirely separate, so you can contribute to your 401(k) and split your IRA contributions between traditional and Roth in whatever combination works for your tax situation.