A Roth IRA makes money through the investments you hold inside it, not from the account itself

The Roth IRA account is a container. The money inside grows because you invest it — in stocks, bonds, mutual funds, or other securities — and those investments earn returns. The Roth IRA itself does not generate returns. You do that by choosing what to buy and hold.

The real advantage of a Roth IRA is not how it makes money, but what happens to that money once it grows. When your investments gain value or pay dividends inside a Roth IRA, you pay no federal income tax on those earnings — ever, even when you withdraw them in retirement. That tax-free growth is what makes a Roth IRA powerful over decades.

A traditional IRA or taxable brokerage account will grow the same way if you make the same investments. But in those accounts, you owe taxes on the gains. In a Roth, you do not. That difference compounds over time and can add tens of thousands of dollars to your retirement savings.

Key Takeaways

  • A Roth IRA grows through the investments you choose to hold inside it — stocks, bonds, mutual funds — not through the account structure itself.
  • All earnings and gains inside a Roth IRA are tax-free when you withdraw them in retirement, unlike a traditional IRA or taxable account.
  • You can withdraw your contributions (the money you put in) at any time without penalty, but earnings must stay until age 59½ unless an exception applies.
  • The longer your money stays invested, the more compound growth works in your favor, which is why starting a Roth IRA early matters more than the size of each contribution.

How investment returns work inside a Roth IRA

When you open a Roth IRA, you fund it with after-tax money — money you have already paid income tax on. You then choose what to invest that money in. If you buy a stock mutual fund and it rises 8% in a year, your account balance rises 8%. If you buy bonds that pay 4% interest, your account earns 4%. If you buy individual stocks and they double, your account doubles.

The growth comes from the investments themselves. A Roth IRA does not add anything to your returns. It simply shields those returns from federal income tax. In a regular taxable brokerage account, you would owe taxes on those same gains each year. In a Roth, you owe nothing — not while the money grows, and not when you withdraw it decades later.

This matters most with long-term, high-growth investments. If you invest $7,000 in a Roth IRA at age 25 and it grows at an average of 7% per year until you turn 65, that $7,000 becomes roughly $147,000. In a taxable account, taxes on the gains along the way would reduce that final amount. In the Roth, you keep all $147,000.

The difference between contributions and earnings

Your Roth IRA holds two types of money: contributions (the money you put in) and earnings (the growth that money produces). The rules for withdrawing each are different, and understanding that difference matters.

You can withdraw your contributions at any time, for any reason, without penalty or taxes. If you put in $7,000 and your account grows to $9,000, you can pull out the $7,000 whenever you need it. The $2,000 in earnings stays locked until you turn 59½, with narrow exceptions (first-time home purchase up to $10,000 lifetime, certain medical expenses, disability).

This flexibility is one reason a Roth IRA can work as both a retirement account and an emergency backup. But it also means you need to be intentional: withdrawing contributions early means less money compounding over time, which costs you in the long run.

Why tax-free growth matters more than you might think

Imagine two people, both 30 years old, both investing $7,000 per year until age 65. One uses a Roth IRA; the other uses a taxable brokerage account. Both earn 7% annually on their investments. At 65, the Roth account has roughly $1.4 million. The taxable account has the same $1.4 million in total value, but the owner owes taxes on the gains — perhaps 15% to 20% depending on their tax bracket and how long they held each investment. That tax bill could be $100,000 or more.

The Roth owner pays nothing. They withdraw the full $1.4 million tax-free. That is the power of tax-free growth compounding over decades. It is not that the Roth earns more; it is that you keep more of what it earns.

This advantage grows larger the longer your money stays invested and the higher your tax bracket in retirement. If you expect to be in a higher tax bracket later, or if tax rates rise, the Roth advantage becomes even stronger.

How to choose investments for your Roth IRA

Once you open a Roth IRA with a brokerage firm — Vanguard, Fidelity, Schwab, or another provider — you choose what to invest in. Most people choose from three broad categories: stock mutual funds or exchange-traded funds (ETFs), bond funds, or a mix of both.

A common approach for someone in their 30s or 40s is to hold 80% stocks and 20% bonds. Someone closer to retirement might shift to 60% stocks and 40% bonds. The younger you are, the more time you have to recover from market downturns, so higher stock exposure makes sense. The closer you are to needing the money, the more stability bonds provide.

You can also hold individual stocks, real estate investment trusts (REITs), or other securities inside a Roth IRA. The tax-free growth applies to all of them equally. The key is that your choice of investment determines your returns — the Roth structure simply protects those returns from taxes.

What happens to your Roth IRA after you turn 59½

Once you reach 59½, you can withdraw earnings tax-free and penalty-free, as long as your Roth IRA has been open for at least five years. This five-year rule applies to all Roth IRAs you own, not to each account separately. If you opened your first Roth IRA at 30, by the time you turn 35, the five-year clock has run for all your Roth accounts.

After 59½ and five years, you can withdraw as much or as little as you want, whenever you want, and owe no federal income tax. You also have no required minimum distributions — the government does not force you to withdraw anything. This gives you flexibility that a traditional IRA does not offer.

If you withdraw before 59½ (except for contributions or a narrow exception), you owe income tax on the earnings plus a 10% penalty. That penalty is steep, which is why a Roth IRA works best as a true long-term account, not a short-term savings tool.

Income limits and contribution caps for Roth IRAs

The IRS limits how much you can contribute to a Roth IRA each year. For 2024, the limit is $7,000 if you are under 50, and $8,000 if you are 50 or older. These limits change periodically, so check the IRS website or your brokerage for the current year.

There is also an income limit. If your modified adjusted gross income (MAGI) exceeds a certain threshold, you cannot contribute the full amount, and above a higher threshold, you cannot contribute at all. The thresholds vary by filing status and change each year. For 2024, single filers begin phasing out at $146,000 and cannot contribute at $161,000. Married filing jointly begin at $230,000 and phase out completely at $240,000.

If your income exceeds the limit, you may be able to use a backdoor Roth strategy: contribute to a traditional IRA and then convert it to a Roth. This is legal but has tax implications if you already hold traditional IRA balances. Speak with a tax professional before attempting a backdoor conversion.

Frequently Asked Questions

Can I lose money in a Roth IRA?

Yes. A Roth IRA is a container for investments, and investments can fall in value. If you invest in stocks and the market drops 20%, your Roth IRA balance drops 20%. The tax-free growth applies to gains, but it also applies to losses — you cannot deduct losses from a Roth IRA on your taxes. Over long periods, stock markets have historically recovered, but short-term losses are real.

What is the difference between a Roth IRA and a Roth 401(k)?

Both offer tax-free growth, but a Roth 401(k) is offered through an employer and has higher contribution limits ($23,500 in 2024 for those under 50). A Roth IRA is opened independently and has lower limits ($7,000 in 2024). A Roth 401(k) requires you to take distributions starting at 73; a Roth IRA does not. Choose based on what your employer offers and your income level.

Do I have to pick individual stocks, or can I just buy funds?

You can do either. Most people buy mutual funds or ETFs because they are diversified — one fund holds dozens or hundreds of stocks or bonds. This spreads risk. Individual stocks are riskier but can offer higher returns if you pick well. Beginners usually start with funds; experienced investors may mix both.

What happens to my Roth IRA if I die?

Your beneficiary inherits the account and can withdraw the money. The earnings are still tax-free to them. If they are a spouse, they can treat it as their own Roth IRA. Non-spouse beneficiaries must withdraw the balance within ten years under current rules, though they owe no income tax on the withdrawal.

Can I move money from a traditional IRA to a Roth IRA?

Yes, through a Roth conversion. You withdraw money from a traditional IRA and deposit it into a Roth IRA. You owe income tax on the amount converted in that year, but future growth is tax-free. This strategy makes sense if you expect to be in a higher tax bracket later or if tax rates rise, but it has immediate tax costs.