No, they are not the same, and the differences affect how much you can save and when you can access your money

A Roth 401(k) and a Roth IRA both let you save money after taxes and withdraw it tax-free in retirement. But they are run by different rules. A Roth 401(k) is an employer plan — your company offers it, takes contributions from your paycheck, and may match part of what you put in. A Roth IRA is an individual account you open on your own at a bank or brokerage, and your employer has nothing to do with it. The contribution limits are different, the income limits are different, and the rules about when you can take money out are different.

The choice between them usually comes down to what your employer offers and how much you earn. If your company offers a Roth 401(k), you can save much more per year. If you earn too much for a Roth IRA but want a Roth account, a Roth 401(k) may be your only option. If you earn less and want more control over your investments, a Roth IRA might suit you better.

Key Takeaways

  • A Roth 401(k) is offered by your employer and lets you save up to $23,500 per year (as of 2024), while a Roth IRA is individual and caps out at $7,000 per year.
  • Roth 401(k)s have no income limit, but Roth IRAs phase out for higher earners — the income threshold depends on your filing status and changes yearly.
  • You can borrow from a Roth 401(k) during your working years, but you cannot borrow from a Roth IRA at all.
  • Roth 401(k)s require you to start taking distributions at age 73, while Roth IRAs have no required distributions during your lifetime.
  • Both accounts let your money grow tax-free and let you withdraw earnings tax-free in retirement, as long as you follow the rules.

Contribution limits and how much you can save

The annual contribution limit for a Roth 401(k) is much higher than for a Roth IRA. For 2024, you can put up to $23,500 into a Roth 401(k) if your employer offers one. If you are 50 or older, you can add an extra $7,500 as a catch-up contribution, bringing your total to $31,000. These limits change each year based on inflation.

A Roth IRA has a much lower limit: $7,000 per year in 2024, or $8,000 if you are 50 or older. This limit also adjusts yearly. If you want to save significantly more for retirement and your employer offers a Roth 401(k), that plan gives you roughly three times the annual room to save.

Some employers let you contribute to both a traditional 401(k) and a Roth 401(k) in the same year, but your combined contributions to all 401(k) plans cannot exceed the annual limit. You can have a Roth IRA and a Roth 401(k) at the same time, but contributions to each count separately toward their own limits.

Income limits and who can use each account

A Roth 401(k) has no income limit. No matter how much you earn, if your employer offers the plan, you can open one and contribute the full amount. This makes it the only Roth option for very high earners.

A Roth IRA phases out based on your income and filing status. For 2024, if you file as single, you can contribute the full amount if your income is below $146,000. The contribution phases out between $146,000 and $161,000, and you cannot contribute at all if you earn $161,000 or more. If you are married filing jointly, the phase-out range is $230,000 to $240,000. These income thresholds change each year.

If you earn too much for a Roth IRA but want a Roth account, a Roth 401(k) is often your only path. Some people use a workaround called a "backdoor Roth," which involves converting a traditional IRA to a Roth IRA, but that strategy has its own rules and tax consequences.

Employer matching and how your employer can help

If your employer offers a Roth 401(k), they may also offer to match part of your contributions. A typical match is 50 cents for every dollar you contribute, up to 6 percent of your salary. This matching money is assistance programs — it is a direct boost to your retirement savings. The match amount depends on your employer's plan, and not all employers offer matching.

A Roth IRA is individual, so there is no employer match. You fund it entirely on your own. If your employer offers a Roth 401(k) with a match, that is a significant financial advantage over a Roth IRA, because you are getting extra money added to your account.

Some employers offer both a traditional 401(k) and a Roth 401(k) option. If that is your situation, you can choose which type to contribute to, or split your contributions between them. The match usually goes into whichever account you designate.

Required distributions and access to your money

A Roth 401(k) requires you to start taking distributions at age 73. The amount you must withdraw each year is calculated based on your age and account balance. This is called a required minimum distribution, or RMD. You must follow this rule even if you do not need the money and do not want to withdraw it.

A Roth IRA has no required distributions during your lifetime. You can leave the money in the account to grow tax-free for as long as you live, and withdraw only what you want, when you want. This is a major advantage if you do not need the money or want to pass it to heirs.

Both accounts let you withdraw your contributions (the money you put in) at any time without penalty. But if you withdraw earnings (the growth) before age 59½, you will owe taxes and a 10 percent penalty, unless you meet a narrow exception like a disability or first-time home purchase. The five-year rule also applies: you must have held the Roth account for at least five years before you can withdraw earnings tax-free, even after age 59½.

Loans and borrowing against your account

A Roth 401(k) allows you to borrow against your balance while you are still working. You can typically borrow up to 50 percent of your vested balance, up to a maximum of $50,000. You repay the loan through payroll deductions, usually over five years. If you leave your job, you typically have to repay the loan quickly or it is treated as a withdrawal and taxed.

A Roth IRA does not allow loans at all. You cannot borrow against your Roth IRA balance under any circumstances. If you need access to the money, your only option is to withdraw it, which may trigger taxes and penalties if you take out earnings before age 59½.

The loan feature of a Roth 401(k) can be useful in a financial emergency, but it also means you are reducing the money that is growing for retirement. Loans should be a last resort, not a regular source of cash.

Investment choices and how much control you have

A Roth 401(k) typically offers a limited menu of investment options — usually mutual funds, target-date funds, and sometimes individual stocks or bonds. Your employer or the plan administrator decides what is available. You choose how to allocate your money among those options, but you cannot invest in anything outside the plan's menu.

A Roth IRA gives you much more control. Once you open an account at a brokerage, you can usually invest in almost anything: individual stocks, bonds, mutual funds, exchange-traded funds, real estate investment trusts, and more. Some brokerages restrict certain investments like options or margin trading, but the range is far wider than a 401(k).

If you are an experienced investor or have strong preferences about how your money is invested, a Roth IRA offers more flexibility. If you prefer a simpler approach or want your employer to help manage the account, a Roth 401(k) may be easier to use.

Frequently Asked Questions

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

Yes. You can contribute to both in the same year, and the contribution limits are separate. Your Roth 401(k) contributions do not count toward your Roth IRA limit, and vice versa. This is useful if your employer offers a Roth 401(k) with a match and you also want the flexibility of a Roth IRA.

What happens to my Roth 401(k) if I leave my job?

You can roll the balance into a Roth IRA or into a Roth 401(k) at your new employer if they offer one. Rolling into a Roth IRA gives you more investment choices and removes the required distribution rule. Rolling into another Roth 401(k) keeps the same structure. You do not have to do anything immediately, but leaving it with your old employer may mean higher fees.

If I convert a traditional 401(k) to a Roth 401(k), do I owe taxes?

Yes. When you convert pre-tax money to a Roth account, you owe income tax on the amount converted in that tax year. This is a one-time tax bill, but it can be substantial if you convert a large balance. Consult a tax professional before converting, because the tax impact depends on your income and other factors.

Which one should I choose if my employer offers both?

If you expect to be in a higher tax bracket in retirement, a Roth account (either type) is usually better because you pay taxes now at a lower rate. If you expect to be in a lower bracket in retirement, a traditional account may save you more. If your employer matches contributions, that is a reason to contribute to the 401(k) first, whether traditional or Roth, because the match is assistance programs.