A Roth account lets you put money in after taxes, then withdraw it tax-free in retirement

A Roth account is a retirement savings account where you contribute money that has already been taxed. The trade-off is that when you withdraw that money in retirement — along with any growth it earned — you pay no federal income tax on it. The IRS sets contribution limits each year (for 2024, it's $7,000 for people under 50, $8,000 if you're 50 or older), and you can only contribute money you actually earned from work.

The main appeal is tax-free growth. If you put $7,000 into a Roth account at age 30 and it grows to $50,000 by age 65, you owe no tax on that $43,000 gain when you take it out. With a traditional 401(k) or IRA, you'd owe income tax on the full amount you withdraw.

There are two common types: a Roth IRA (individual retirement account) that you open yourself, usually through a bank or brokerage, and a Roth 401(k) offered through your employer. Both follow the same tax principle — you pay tax going in, nothing on the way out — but they have different rules about how much you can contribute and when you can withdraw.

Key Takeaways

  • You contribute after-tax dollars to a Roth account, but withdrawals in retirement are completely tax-free.
  • A Roth IRA is opened on your own and has an annual contribution limit of $7,000 (or $8,000 if you're 50+) in 2024, but you can only contribute if you earned income that year.
  • A Roth 401(k) is offered by your employer and has a much higher limit ($23,500 in 2024, or $31,000 if you're 50+), but fewer people have access to one.
  • You cannot withdraw earnings from a Roth IRA before age 59½ without penalty, though you can withdraw your own contributions anytime.
  • Income limits explore to Roth IRA contributions — if you earn above a certain threshold, you cannot contribute directly, though a "backdoor" method exists for higher earners.

How contributions work: what you put in and when

With a Roth IRA, you contribute money from your paycheck after your employer has already withheld taxes. You write a check or transfer funds from your bank account to the Roth IRA account you've opened. The money you contribute is not deductible on your tax return — you've already paid tax on it through your paycheck.

With a Roth 401(k), your employer deducts contributions directly from your paycheck, again after taxes have been withheld. Your employer may also offer a traditional 401(k), a Roth 401(k), or both. You choose which one to use, and the money goes into whichever account you've selected.

You can contribute to a Roth IRA anytime during the year, and you have until the tax filing important date (usually April 15 of the following year) to make contributions for the previous year. With a Roth 401(k), contributions are made through payroll, so timing depends on your employer's plan setup.

Income limits for Roth IRA contributions

The IRS limits who can contribute directly to a Roth IRA based on your income. If you earn above a certain amount, you cannot contribute at all. These limits change yearly and depend on your filing status (single, married filing jointly, etc.). For 2024, if you're single, the limit phases out between $146,000 and $161,000 of income. If you're married filing jointly, it phases out between $230,000 and $240,000.

If your income exceeds these thresholds, you have two options: contribute to a traditional IRA instead, or use a "backdoor Roth" strategy. A backdoor Roth involves contributing to a traditional IRA (which has no income limit) and then converting it to a Roth IRA. This is legal but has tax consequences if you already have other traditional IRA balances, so consult a tax professional before attempting it.

Roth 401(k)s do not have income limits — if your employer offers one, you can use it regardless of how much you earn.

When you can withdraw money and what happens if you withdraw early

You can withdraw your own contributions to a Roth IRA anytime, penalty-free. If you contributed $5,000 and the account grew to $7,000, you can pull out the $5,000 with no tax or penalty. The $2,000 in earnings is a different story.

Earnings can be withdrawn tax-free and penalty-free only after you turn 59½ and have held the Roth IRA for at least five years. If you withdraw earnings before age 59½, you owe income tax on them plus a 10% early withdrawal penalty. There are a few exceptions — you can withdraw earnings penalty-free (but not tax-free) for a first home purchase (up to $10,000 lifetime), medical expenses, disability, or a few other narrow situations.

With a Roth 401(k), the rules are stricter. You cannot withdraw contributions or earnings before age 59½ without owing the 10% penalty, even though the money is yours. The five-year holding period also applies. Some employers allow "loans" against your Roth 401(k) balance, which is a workaround, but this varies by plan.

Roth IRA versus Roth 401(k): which one matters to you

A Roth IRA is for anyone with earned income who wants to save for retirement on their own. You open it at a bank, brokerage, or credit union. You control what investments go into it. The contribution limit is lower ($7,000 in 2024), but there are no required withdrawals — you can leave the money untouched for your entire life if you want.

A Roth 401(k) is only available if your employer offers it. The contribution limit is much higher ($23,500 in 2024), which makes it useful if you want to save aggressively. However, you're limited to the investment options your employer's plan offers, and you must begin taking withdrawals at age 73 (the required minimum distribution age), even if you don't need the money.

Many people use both: they contribute to a Roth 401(k) through their employer up to the limit they can afford, then open a Roth IRA and contribute to that as well. This is allowed and often a smart move if you have the income to support both.

How a Roth account grows and what you owe on investment gains

Once money is in your Roth account, you invest it — typically in stocks, bonds, mutual funds, or exchange-traded funds (ETFs), depending on what your account offers. As those investments grow, you owe no tax on the gains, dividends, or interest earned inside the account. This is the core advantage: all growth is tax-free.

Compare this to a regular taxable brokerage account, where you owe tax each year on dividends and interest, and capital gains tax when you sell an investment at a profit. In a Roth, none of that happens until you withdraw — and even then, you owe nothing if you follow the rules.

This tax-free growth compounds over decades. A $7,000 contribution at age 25 could grow to $100,000+ by age 65, depending on investment returns. In a taxable account, you'd owe tax on a significant portion of those gains along the way.

Roth accounts and required withdrawals in retirement

A Roth IRA has no required minimum distributions (RMDs) during your lifetime. You can leave the money untouched for as long as you live, which makes it useful for leaving money to heirs. When you die, your beneficiaries inherit the account and can withdraw it tax-free (though they must follow specific rules about timing).

A Roth 401(k) does require you to begin withdrawals at age 73, even if you don't need the money. You must withdraw a calculated percentage of the account balance each year. If you don't, the IRS charges a penalty of 25% of the amount you should have withdrawn (reduced to 10% if you correct it within two years).

If you have both a Roth IRA and a Roth 401(k), the RMD applies only to the 401(k). Some people roll their Roth 401(k) into a Roth IRA after they retire or leave their job, which eliminates the RMD requirement.

Frequently Asked Questions

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

Yes. You can contribute to both in the same year. However, if your employer offers both a traditional 401(k) and a Roth 401(k), your combined contributions to both cannot exceed the annual limit ($23,500 in 2024). A Roth IRA is separate and has its own limit ($7,000 in 2024).

What happens if I withdraw money from my Roth IRA before age 59½?

You can withdraw your contributions anytime without penalty. If you withdraw earnings before 59½, you owe income tax on them plus a 10% penalty, unless you may have access to for an exception like a first-time home purchase, disability, or medical hardship.

Is a Roth account right for me if I think I'll be in a lower tax bracket in retirement?

A Roth makes the most sense if you expect to be in the same or higher tax bracket in retirement, or if you want tax-free growth and flexibility. If you're confident you'll be in a much lower bracket later, a traditional 401(k) or IRA may save you more in taxes overall. Many people use both types to hedge their bets.

Can I convert a traditional IRA to a Roth IRA?

Yes. You can convert all or part of a traditional IRA balance to a Roth IRA. You'll owe income tax on the amount converted in that tax year, but the money then grows tax-free. This is useful for higher earners who can't contribute directly to a Roth IRA.

What if my employer doesn't offer a Roth 401(k)?

You can still open a Roth IRA on your own, as long as you have earned income and your income is below the limit. If you earn too much for a Roth IRA, a backdoor Roth conversion is an option, though it involves some complexity and potential tax consequences.