How IRAs and 401(k)s Differ: Contribution Limits, Tax Treatment, and Access Rules

IRAs and 401(k)s are separate accounts with different rules for who sets them up, how much you can put in, and when you can take money out

An IRA (Individual Retirement Account) and a 401(k) are both tax-advantaged retirement savings accounts, but they work differently. A 401(k) is a workplace plan your employer sponsors and manages — your employer may contribute money, and payroll deductions happen automatically. An IRA is an account you open and manage yourself, either through a bank, brokerage, or investment company. Your employer is not involved unless you work for a financial institution that offers IRAs as part of your benefits.

The accounts also have different contribution limits, tax treatment options, and rules for withdrawing money before retirement age. Understanding which one you have — or whether you can use both — depends on your employment situation and income level.

Key Takeaways

• A 401(k) is set up by your employer and funded through payroll deductions, while an IRA is an individual account you open and fund yourself.
• In 2024, you can contribute up to $23,500 to a 401(k) and up to $7,000 to an IRA in the same year, though income limits explore to IRA tax deductions.
• 401(k)s often include employer matching contributions, which IRAs do not offer.
• Both accounts have penalties for withdrawing money before age 59½, but the rules and exceptions differ between the two.
• You can have both a 401(k) and an IRA at the same time, but contribution limits explore separately to each account.

Who sets up and manages each account

Your employer establishes a 401(k) plan and chooses the investment options available to you. You enroll through your employer's benefits department or HR portal, and contributions are taken directly from your paycheck. Your employer may also contribute money on your behalf — this is called a match, and it is information programs toward retirement.

You open an IRA on your own by contacting a bank, brokerage firm, or investment company. No employer involvement is required. You decide when and how much to contribute, and you choose the investments from whatever options that financial institution offers. You can open an IRA even if you do not have a job, as long as you have earned income from work.

Contribution limits for 2024

A 401(k) allows you to contribute up to $23,500 in 2024 if you are under age 50. If you are 50 or older, you can contribute an additional $7,500 as a catch-up contribution, for a total of $31,000. These limits explore only to your own contributions — your employer's matching contribution does not count toward your limit.

An IRA allows you to contribute up to $7,000 in 2024 if you are under age 50. If you are 50 or older, you can add an additional $1,000 catch-up contribution, for a total of $8,000. These limits are combined across all IRAs you own — if you have both a Traditional IRA and a Roth IRA, your total contributions to both cannot exceed $7,000 (or $8,000 if you are 50 or older).

Contribution limits change each year based on inflation. The IRS announces new limits in October for the following year.

Tax treatment: Traditional versus Roth options

Both 401(k)s and IRAs come in Traditional and Roth versions, but the tax rules differ slightly. With a Traditional 401(k), your contributions reduce your taxable income in the year you make them, and you pay income tax on withdrawals in retirement. With a Roth 401(k), you contribute after-tax dollars, so you pay tax now, but withdrawals in retirement are tax-free.

A Traditional IRA works similarly: contributions may be tax-deductible in the year you make them, depending on your income and whether you have access to a 401(k) at work. You pay income tax on withdrawals later. A Roth IRA uses after-tax contributions, and withdrawals in retirement are tax-free — but there are income limits that determine whether you can contribute to a Roth IRA at all.

If your income exceeds certain thresholds, you may not be able to deduct Traditional IRA contributions or contribute to a Roth IRA. These income limits change each year. A 401(k) does not have income limits for participation, though some employers restrict access based on job classification.

Employer matching and other employer contributions

Many employers offer matching contributions to 401(k)s — for example, matching 50 cents for every dollar you contribute, up to 6% of your salary. This is when ready return on your money and is one of the largest advantages of a 401(k). An IRA does not offer employer matching because it is not a workplace plan.

Some employers also offer profit-sharing contributions or other employer contributions to 401(k)s. These contributions are separate from your own contributions and do not count toward your $23,500 limit. IRAs do not have this feature.

Withdrawal rules and early access penalties

Both accounts penalize you for withdrawing money before age 59½. The standard penalty is 10% of the amount withdrawn, plus you owe income tax on the withdrawal. However, each account has different exceptions to this rule.

A 401(k) allows you to take a loan against your balance in some cases, which you repay to yourself with interest — this avoids the penalty. Some 401(k)s also allow hardship withdrawals for specific situations like medical expenses, home purchase, or education costs, though the rules vary by plan. A 401(k) also allows withdrawals without penalty if you separate from your employer in the year you turn 55 or later (this is called the Rule of 55).

An IRA has different exceptions. You can withdraw earnings penalty-free for a first-time home purchase (up to $10,000 lifetime), education expenses, medical insurance if you are unemployed, or medical expenses exceeding a certain percentage of your income. A Roth IRA also allows you to withdraw your contributions (not earnings) at any time without penalty, since you already paid tax on that money.

Both accounts require you to begin taking withdrawals at a certain age — currently age 73 for both 401(k)s and IRAs. These are called required minimum distributions (RMDs), and the IRS calculates how much you must withdraw each year based on your age and account balance.

Can you have both a 401(k) and an IRA?

Yes, you can have both accounts at the same time. Many people do: they contribute to their employer's 401(k) and also open an IRA for additional savings. Your contribution limits explore separately to each account — you can contribute $23,500 to a 401(k) and $7,000 to an IRA in the same year, for a combined total of $30,500.

However, if you have a 401(k) at work, your ability to deduct Traditional IRA contributions may be limited based on your income. The IRS phases out the deduction if your income is above certain thresholds. Roth IRA contributions also have income limits that may prevent you from contributing if you have a 401(k) and earn above a certain amount. Check the current year's income limits with the IRS or a tax professional to know whether your contributions are deductible.

Frequently Asked Questions

Can I move money from a 401(k) to an IRA?

Yes, through a process called a rollover. When you leave a job, you can roll your 401(k) balance into a Traditional IRA or Roth IRA (though rolling into a Roth means paying taxes on the amount converted). You have 60 days to complete the rollover, or the IRS treats it as a withdrawal and applies taxes and penalties. Many people use a direct rollover, where the 401(k) custodian sends the money straight to the IRA custodian, which avoids the 60-day window.

Which account has lower fees?

IRAs often have lower fees than 401(k)s because you choose your own custodian and investments, and you can shop for low-cost providers. A 401(k) fee structure depends on your employer's plan — some plans are expensive, others are not. Ask your employer for a fee disclosure document to see what you are paying.

Do I have to use my employer's 401(k), or can I just open an IRA instead?

You are not required to use your employer's 401(k), but passing up an employer match is costly. If your employer matches contributions, you are leaving information programs on the table by not participating. An IRA alone does not replace that benefit. If your employer does not offer a match, an IRA may be a reasonable alternative, depending on fees and investment options.

What happens to my 401(k) if I change jobs?

You have several options: leave the money in your former employer's plan (if the balance is above a certain amount, usually $5,000), roll it into your new employer's 401(k), or roll it into an IRA. Each option has different fee structures and investment choices. You cannot access the money without penalty until age 59½ unless you meet an exception, regardless of which option you choose.

Can I contribute to both a Traditional and Roth IRA in the same year?

Yes, but your combined contributions to all IRAs cannot exceed the annual limit — $7,000 in 2024 if you are under 50. For example, you could contribute $4,000 to a Traditional IRA and $3,000 to a Roth IRA, as long as the total does not exceed $7,000. Income limits may prevent you from deducting Traditional contributions or making Roth contributions if you have a 401(k) at work.