IRA vs 401(k): Key Differences, Benefits and How to Choose the Right Retirement Account

Many workers have two major ways to save for retirement in tax-advantaged accounts—an IRA and a 401(k). “They have very different rules, but both are critical for your golden years,” says retirement expert and top financial advisor Eric Amzalag, CFP, “because each one affects how much you can save…how you invest…how your money is taxed…and how it grows.”

We asked Amzalag how you can use each of these savings vehicles most effectively…

What Is a 401(k)?

A 401(k) is a retirement-savings plan offered by your employer that allows workers to have a percentage of each paycheck automatically withheld and added to a long-term investment account. With a traditional 401(k), contributions automatically reduce your taxable income, and many employers match a portion of your contributions. Money grows tax-deferred until you withdraw it after age 59½. Many employers now allow workers to contribute to a Roth 401(k) account (also called a designated Roth account) as well (more on traditional vs Roth accounts below).

Eligibility: Usually you must be at least 21 years old and have completed one year of service at your job, typically defined as 1,000 hours within 12 months. Long-term part-time employees (500+ hours for two consecutive years) also may be allowed to participate

2026 contribution limits: Employees under age 50 can contribute a maximum of $24,500 to a 401(k) in 2026. Employees ages 50 and older can make additional catch-up contributions of $8,000. Employees ages 60 to 63 can instead make a special “super” catch-up contribution of $11,250. The total maximum for employer and employee contributions is as much as $72,000 ($80,000 for employees age 50 and older…$83,250 for those ages 60 to 63). “You can split your money between a traditional and Roth 401(k) any way you want,” says Amzalag. “But these limits apply to the total across all your 401(k) accounts.”

What Is an IRA?

An IRA is a tax-advantaged personal investment account that allows individuals to invest outside of an employer-sponsored plan. You can open an account on your own directly with a financial institution. IRAs come in multiple forms including a traditional IRA…a Roth IRA…and a spousal IRA, which allows working spouses to contribute to an IRA in the name of a non-working spouse.

2026 contribution limits: $7,500 ($8,600 for those age 50 and older). These limits apply to the total across all your IRAs. Annual contributions cannot exceed your earned income for the year. A catch-up contribution of $1,100 for those age 50 and older is allowed.

Key Differences Between an IRA and a 401(k)

Contribution limits

“401(k) accounts are a much faster way to build wealth,” says Amzalag. “High contribution limits make them particularly beneficial for high-earners and late-starters to retirement saving. IRAs favor freelance and gig workers who don’t qualify for employer-sponsored plans.”

Employer matching

Many employer-sponsored 401(k) plans offer to match a percentage of the contributions an employee makes, typically 50% of every dollar the employee contributes, up to 6% of the employee’s salary. Employers are not permitted to make matching contributions to IRAs.

Investment options

401(k) plans usually offer a limited choice of investments, such as mutual funds and exchange-traded funds (ETFs) or company stock for publicly traded corporations. IRAs provide a very broad variety of investment options, “especially if you own one through a brokerage supermarket such as Fidelity or Charles Schwab,” adds Amzalag.

Fees and expenses

Many 401(k) plans, especially in smaller companies, come with high administrative fees and/or higher-cost funds. IRAs allow investors to select very low-cost funds and ETFs.

Loans

Many 401(k) plans allow participants to take loans and make penalty-free withdrawals under limited conditions such as hardship and birth/adoption. With IRAs, you are not allowed to take loans, but there are more penalty exceptions, such as withdrawals for education, first-time home purchases, health insurance premiums during unemployment and unreimbursed medical expenses.

Traditional vs. Roth: Understanding Your Options

Contributions to traditional 401(k)s and IRAs typically are treated as nontaxable compensation and grow tax-deferred. That means you don’t pay taxes on dividends, interest or capital gains each year within your account. But you are required you to pay ordinary income tax rates on any qualified distributions, and you may be required to take required minimum distributions (RMDs) starting start at age 73. (If you are not a 5% owner of the company, you can delay distributions from a 401(k) until retirement if the plan allows it.)

Roth 401(k)s and IRAs are funded with after-tax money, so they provide no immediate tax break but grow tax-free so you avoid paying any tax on qualified withdrawals…and there are no RMDs.

“In general, your income determines whether a traditional or a Roth account makes more sense,” says Amzalag.  If you have lower to moderate income and are in a low tax bracket, favor a Roth IRA or Roth 401(k). It makes sense to pay taxes and avoid them later. If you have a higher income, favor traditional IRAs and 401(k)s to take advantage of the tax deductions.

Other considerations…

Time horizon

“If you have decades for your money to compound before retirement,” says Amzalag, “Roth accounts are more valuable because all growth is tax-free.”

Income limits: You can contribute to a traditional or Roth 401(k), no matter how much you earn in a year. And maxing out your contributions to a 401(k) does not reduce how much you can put into an IRA. But IRAs come with some restrictions. To contribute to a Roth IRA, your modified adjusted gross income (MAGI) must be below certain annual limits set by the IRS. Couples who are married and file jointly and qualifying widows/widowers can make a full contribution if their MAGI is less than $242,000, which phases out to no contributions when their income is over $252,000. Also, with a traditional IRA, your ability to deduct contributions on your income tax depends on two factors—your MAGI and whether you have a 401(k). For married couples filing jointly, if the spouse making the IRA contribution is covered by a retirement plan, the phaseout range is between $129,000 and $149,000. But for an IRA contributor who is not covered by a retirement plan and is married to someone who is covered, the phaseout range is between $242,000 and $252,000.

If neither you nor your spouse is covered by a workplace plan, you can take a full deduction for any contributions. If either of you is covered and you are filing jointly with a MAGI of less than $129,000, you can take a full deduction, which phases out to no deduction for income over $149,000.

Employer-match policy

While employers commonly match contributions made to a Roth 401(k), you will owe income taxes on the match amount in the year it is made.

Early withdrawals

Early withdrawals from a traditional 401(k) and/or an IRA before age 59½ usually trigger income taxes and a 10% penalty on the amount withdrawn. “Tapping a Roth IRA or Roth 401(k) has more complex rules,” stresses Amzalag.  For a Roth IRA, your contributions (but not earnings) can be withdrawn any time, tax- and penalty-free, regardless of your age or how long the account has existed. For a Roth 401(k), early distributions are treated as pro rata—they are part contributions and part earnings. So, if you withdraw early, part of the withdrawal may be taxable and/or penalized because it is considered earnings. If you want to take money out of a Roth 401k fully tax free, you need to be 59 1/2 or older and satisfy the Roth 401(k) five-year rule (five years after January 1 of the year you first made Roth 401k contributions to that employer plan).

Pros and Cons: IRA vs. 401(k)

Each of these powerful retirement savings tools have strengths and weaknesses…

IRA pros

• Wide investment choices
• Potentially lower fees
• No taxes or penalties on early withdrawal of Roth contributions

IRA cons

• Much lower annual contribution limits
• Annual income restrictions to qualify to make contributions
• No employer match
• Less protection against creditors and lawsuits (rules for IRAs vary by state, while 401(k)s have strong protections under federal law)

401(k) pros

• Higher contribution limits
• Employer matching
• Automatic payroll deductions…loan options

401(k) cons

• Limited investment choices
• Potentially higher fees
• Tied to your employer (when you leave your job, you’ll need to leave it with your employer, roll it over or manage it separately…or if the amount is $7,000 or less, your employer can cash out the account and send you a check)

Can You Have Both an IRA and a 401(k)?

“I typically recommend clients contribute to both,” says Amzalag. “Because your contribution limits for IRAs and 401(k)s are separate, you can potentially grow your nest egg by hundreds of thousands of dollars using both.”

It’s also important to mix traditional and Roth varieties for each type of retirement savings. Reason: Tax diversification. “Once you retire,” explains Amzalag, “you want to be able to draw from accounts with different tax treatments to create the most beneficial outcome.” Example: If you need money but drawing it from a tax-deferred traditional 401(k) is likely to push you into a higher tax income bracket for the year, it may be wiser to tap your Roth IRA tax-free to get that money.

Rollovers: Moving Money Between Accounts

In many circumstances, the IRS allows you to transfer funds from one type of retirement account to another without triggering taxes or penalties. “You may want to roll over money this way,” says Amzalag, “because consolidating accounts makes your financial life simpler and provides more control over investment strategies, choices and fees.”

Three common types of rollovers…

Moving an IRA into another IRA

You can move an IRA directly from one brokerage firm to another or roll it into an existing IRA whenever you want and as often as you want, as long as you do a “direct” rollover. That means you instruct the current trustee of your IRA to send the money directly to the trustee of your other IRA.

Moving a 401(k) into an IRA

This kind of rollover is more restrictive.  Usually, you can move a 401(k) only when you leave your employer. But in some cases, employers allow you to do an “in-service rollover” from your 401(k) to an IRA once you reach age 59½, which means you can transfer the assets while you are still employed at that company.

Moving a 401(k) into a new 401(k)

This occurs when you change jobs. You often have the option of leaving the 401(k) with your old employer or rolling it into your new 401(k) if your new employer allows it.

Caveats…

You cannot roll over a Roth 401(k) or Roth IRA into a traditional one.  “Roth assets must remain in a Roth-designated account to maintain their tax-advantaged status,” says Amzalag.

There are legitimate reasons not to roll over your 401(k). Some of the reasons: Your existing plan has unique institutional investments such as stable value funds or a guaranteed income fund…you still are working in your 70s and want to delay RMDs…you have appreciated company stock that can qualify for special tax treatment from the IRS when you sell it… you plan to use what Amzalag calls “The rule of 55,” which allows workers who leave their jobs during or after the year they turn 55 to avoid paying the early-withdrawal penalty on their retirement-account distributions.

How to Choose the Right Retirement Account for You

“It’s not just about picking one,” says Amzalag. “It’s about matching your various accounts to your income, tax situation and goals.”

Here’s the order that I recommend for many people to prioritize contributions to retirement accounts…

1. Contribute to your 401(k) up to the employer match.
2. Max out your IRA (preferably your Roth IRA if you are in a lower tax bracket and can do without the tax break).
3. Go back and max out your 401(k).
4. If you have additional money, contribute to a taxable account.