A 401(k) and an IRA are separate retirement accounts with different rules, limits, and who runs them

A 401(k) is a retirement account your employer sets up and manages. An IRA (Individual Retirement Account) is one you open and manage yourself, usually through a bank or investment firm. They are not the same account, and you can have both at the same time. The main differences come down to who contributes money, how much you can put in each year, when you can take money out, and what happens to the account if you change jobs.

The confusion happens because both accounts let you save for retirement with tax advantages. But the way the tax break works, the contribution limits, and the rules around withdrawals are all different. Understanding which is which matters because the choices you make in one account do not affect the other.

Key Takeaways

  • A 401(k) is employer-sponsored and funded partly by you and partly by your employer, while an IRA is individual and funded only by you.
  • You can contribute up to $23,500 to a 401(k) in 2024, but only up to $7,000 to an IRA in the same year—these limits do not overlap.
  • A 401(k) typically requires you to wait until age 59½ to withdraw money without penalty, while some IRAs let you access contributions earlier under specific rules.
  • If you leave your job, you can move a 401(k) to an IRA through a rollover, but the two accounts remain separate unless you combine them.
  • You can have both a 401(k) and an IRA open at the same time, and many people do to save more for retirement.

How contributions work in each account

With a 401(k), money comes out of your paycheck before taxes are taken out (if it is a traditional 401(k)). Your employer may also contribute matching funds—for example, they might add 50 cents for every dollar you put in, up to a certain percentage of your salary. You do not have to do anything to fund it beyond authorizing the payroll deduction when you first enroll.

With an IRA, you fund it yourself by transferring money from your bank account. No employer is involved. You decide how much to contribute and when. The money can come from your paycheck, a bonus, self-employment income, or any other source. You have until the tax filing important date (usually April 15 of the following year) to make contributions for the previous tax year.

The annual contribution limits are separate. In 2024, you can put up to $23,500 into a 401(k) and up to $7,000 into an IRA. If you contribute $5,000 to an IRA, you can still contribute the full $23,500 to a 401(k)—the limits do not reduce each other. However, if you have both a traditional IRA and a Roth IRA, your combined contributions to both cannot exceed $7,000 per year.

Tax treatment differs between the two accounts

A traditional 401(k) reduces your taxable income in the year you contribute. You pay taxes later when you withdraw the money in retirement. A Roth 401(k) (offered by some employers) takes money after taxes, but withdrawals in retirement are tax-free.

A traditional IRA works similarly to a traditional 401(k)—contributions may be tax-deductible now, and you pay taxes on withdrawals later. A Roth IRA takes after-tax money, but may have access to withdrawals in retirement are tax-free. The catch with Roth IRAs is that your income may limit how much you can contribute if you earn above a certain threshold. There is no income limit for 401(k)s.

The tax treatment also affects required withdrawals. Once you turn 73, you must begin taking required minimum distributions (RMDs) from a traditional 401(k) and traditional IRA. Roth IRAs have no RMD requirement during your lifetime, and Roth 401(k)s have RMDs but you can roll them into a Roth IRA to avoid them.

Withdrawal rules and penalties

Both accounts penalize you for taking money out before age 59½, but the rules are not identical. With a 401(k), you generally cannot withdraw money before 59½ without a 10% penalty plus income taxes, with limited exceptions for hardship withdrawals (which vary by plan) or loans against your balance.

With an IRA, you can withdraw your contributions (the money you put in) at any time without penalty, though earnings on those contributions are subject to the early withdrawal penalty. A Roth IRA is more flexible here because contributions and earnings are treated differently. You can also withdraw from an IRA penalty-free for certain reasons: a first home purchase (up to $10,000 lifetime), medical expenses above a threshold, health insurance premiums while unemployed, or may have access to education expenses.

After age 59½, both accounts let you withdraw without penalty. The difference is that 401(k)s often require you to start taking distributions once you reach 73 (or when you retire, depending on the plan), while traditional IRAs have the same requirement but Roth IRAs do not.

What happens to a 401(k) when you change jobs

Your 401(k) stays with your former employer's plan after you leave the job, but you cannot add more money to it. You have several options: leave it there, roll it into your new employer's 401(k) if they offer one, or roll it into an IRA.

A rollover moves money from one retirement account to another without triggering taxes or penalties, as long as you follow the rules. If you roll a 401(k) into a traditional IRA, the money keeps its tax-deferred status. If you roll it into a Roth IRA, you will owe taxes on the amount converted. Many people choose the IRA rollover because IRAs often offer more investment choices and lower fees than 401(k) plans.

An IRA is not tied to an employer, so it stays with you no matter how many jobs you change. You can keep contributing to it as long as you have earned income, even if you also have a 401(k) at a new job.

Can you have both at the same time

Yes. You can have a 401(k) through your employer and an IRA at the same time. Many people do this to save more for retirement, since the contribution limits are separate. For example, you could contribute $10,000 to your 401(k) and $7,000 to an IRA in the same year.

The only limit that connects them is the IRA contribution limit itself. If you have a traditional IRA and a Roth IRA, your combined contributions to both cannot exceed $7,000 per year. But a 401(k) does not count toward that $7,000 limit.

One thing to watch: if you have a traditional IRA and a high income, contributing to a traditional IRA while also having a 401(k) may reduce or eliminate your ability to deduct IRA contributions on your taxes. This is called the IRA deduction phase-out, and it depends on your income and whether your employer offers a 401(k). A tax professional can help you figure out the best strategy for your situation.

Frequently Asked Questions

Can I roll my 401(k) into an IRA?

Yes. A rollover moves the money from your 401(k) into a traditional or Roth IRA without triggering when ready taxes or penalties. You have 60 days to complete the rollover once you receive the funds. Many people do this when they leave a job to consolidate accounts or access more investment options.

What if I have a 401(k) and want to open an IRA—do I have to choose one?

No. You can have both open at the same time and contribute to both in the same year. The contribution limits are separate, so maxing out one does not affect how much you can put into the other.

If I leave my job, do I lose my 401(k)?

No. Your 401(k) balance stays yours. You cannot add more money to it, but you can leave it with your former employer, move it to a new employer's plan, or roll it into an IRA. The money does not disappear when you change jobs.

Can I withdraw from my IRA before 59½ without a penalty?

You can withdraw your contributions anytime without penalty. Withdrawals of earnings before 59½ typically incur a 10% penalty plus taxes, but exceptions exist for first-time home purchases (up to $10,000), medical expenses, education costs, and a few other situations. A 401(k) has fewer early withdrawal exceptions.

Which account should I prioritize if I can only save in one?

If your employer offers a 401(k) match, prioritize that first—it is information programs. Once you have captured the full match, an IRA often offers more flexibility and investment choices. If your employer does not offer a 401(k), an IRA is your main individual retirement savings tool.