An IRA doesn't earn money by itself—your investments inside it do

An IRA is a container. The money you put into it sits there until you tell it to do something. What actually earns money is what you buy with that money: stocks, bonds, mutual funds, or other investments. The IRA is just the tax-sheltered wrapper around those investments. If you open an IRA and leave the cash sitting in a money market account earning 4% annually, that 4% is your return. If you buy stock mutual funds that go up 8% in a year, that 8% is your return. The IRA itself doesn't generate returns—it just lets those returns grow without being taxed every year.

This is the single most important thing to understand about IRAs: they are not savings accounts. A savings account at a bank earns interest automatically. An IRA requires you to choose what to invest in. If you don't make that choice, your money typically sits in a default cash position earning very little.

Key Takeaways

  • An IRA is a container for investments, not an investment itself—the stocks, bonds, or funds you buy inside it are what generate returns.
  • Your money only grows if you actively choose what to invest in; cash sitting idle in an IRA earns minimal interest.
  • Different IRA providers offer different investment options, from simple money market funds to thousands of individual stocks and mutual funds.
  • The tax advantage of an IRA is that your investments grow without being taxed each year, which compounds your returns over time.
  • Your actual earnings depend entirely on what you invest in and how those investments perform in the market.

What you're actually buying when you fund an IRA

When you deposit money into an IRA at a bank or brokerage, that money is now yours to invest. The institution holds it, but you decide where it goes. Most IRA providers let you choose from a menu of options: money market funds (very safe, low return), bond funds (moderate safety, modest return), stock mutual funds (higher risk, potentially higher return), or individual stocks and bonds (you pick each one).

A money market fund inside an IRA might earn 4% to 5% annually right now, depending on current interest rates. A stock mutual fund might earn 7% to 10% in a good year, or lose 15% in a bad one. An individual stock might double or lose half its value. The IRA doesn't control any of this. It just holds whatever you buy and shields the growth from annual taxes.

Some people confuse this with a savings account because both involve a financial institution. But a savings account automatically earns interest on whatever balance sits in it. An IRA requires you to actively purchase investments. If you deposit $5,000 into an IRA and never buy anything, that $5,000 will sit there earning almost nothing, even though the IRA itself is "open."

How the tax shelter actually makes your money grow faster

The real money-making power of an IRA isn't magic—it's the tax deferral. When you own investments outside an IRA, you pay taxes on the gains every year. If a mutual fund earns $1,000 in gains, you owe taxes on that $1,000 that year, even if you don't sell it. That reduces the amount you have left to reinvest.

Inside an IRA, those same gains are not taxed that year. The $1,000 stays in your account and can earn returns on top of itself the next year. Over decades, this compounding effect is significant. A $10,000 investment earning 7% annually grows to about $76,000 in 30 years inside an IRA. The same investment outside an IRA, taxed at 24% each year on gains, grows to about $48,000. The difference is purely the tax deferral, not because the IRA itself is doing anything special.

This is why IRAs are powerful for long-term investing. You're not getting a higher return on your investments. You're just keeping more of the returns you do earn because taxes are deferred until you withdraw the money in retirement.

Different IRA types have different rules about when you pay taxes

A Traditional IRA lets you deduct your contributions from your taxes now (in some cases), and you pay taxes on the money when you withdraw it in retirement. A Roth IRA takes money after taxes now, but you pay no taxes on withdrawals in retirement. Both grow tax-free while the money sits there. The difference is timing of the tax bill, not the growth itself.

For earning money, it doesn't matter which type you choose. Both let your investments grow without annual taxation. The choice between them is about your tax situation now versus your expected tax situation in retirement—a separate decision from how much your investments will actually earn.

Your actual returns depend on what you choose to invest in

This is where most people get stuck. An IRA provider might offer 5,000 different investment options. How much will your money earn? That depends entirely on which ones you pick and how the market treats them.

If you choose a target-date fund (a fund that automatically shifts from stocks to bonds as you approach retirement), you might earn 5% to 7% annually on average over long periods. If you choose individual growth stocks, you might earn 10% or 20% in a good year and lose 30% in a bad one. If you choose bond funds, you might earn 3% to 4%. There is no single answer because there is no single investment.

Many IRA providers offer a "default" option for people who don't choose anything—usually a money market fund or a target-date fund. If you don't actively pick investments, you'll be placed into this default, which may or may not match your goals or timeline.

How to know what your IRA is actually earning

Log into your IRA account online or call your provider. Look at your account statement. It will show you the current balance and usually a "performance" or "returns" section showing what your investments earned over the past month, quarter, and year. This number is your actual return—what your specific investments made, not what the IRA itself made.

If you see your balance went from $10,000 to $10,400 in a year, your return was 4%. That 4% came from the investments you chose, not from the IRA account type. If you see your balance went from $10,000 to $9,800, your investments lost 2% that year. Again, that's the investment performance, not the IRA's fault.

Your statement will also show you what you're currently invested in. If it says "Target Date 2050 Fund" or "Total Stock Market Index Fund," those are the things actually earning (or losing) money. The IRA is just the tax-sheltered container holding them.

Common mistakes that prevent IRAs from earning money

The biggest mistake is opening an IRA and leaving the money in cash. You deposit $5,000, the institution puts it in a money market account by default, and it earns 4% annually. That's not bad, but it's far below what stock investments have historically returned over long periods. If you're 30 years from retirement, you're leaving decades of potential growth on the table.

The second mistake is not opening an IRA at all. If you have earned income, you can open one. The money you contribute grows tax-deferred. If you wait until you're 45 to start, you've lost 15 years of compounding. The earlier you start, the more time your investments have to grow.

The third mistake is panic-selling during market downturns. If your stock mutual fund drops 20% in a bad year, that's normal. If you sell it and move to cash, you lock in the loss and miss the recovery. IRAs are designed for long-term holding, not trading in and out.

Frequently Asked Questions

Does an IRA earn interest like a savings account?

No. An IRA is a container for investments, not an interest-bearing account. If you keep cash in an IRA, it earns minimal interest. You have to buy investments—stocks, bonds, mutual funds—to earn meaningful returns. Those investments earn returns based on market performance, not because the IRA itself generates interest.

Can I lose money in an IRA?

Yes, if your investments decline in value. If you buy stock mutual funds and the stock market drops 20%, your IRA balance drops 20%. The IRA itself doesn't protect you from market losses. It only protects you from taxes on gains. Conservative investments like bond funds or money market accounts have lower risk but also lower potential returns.

How much will my IRA earn in a year?

That depends entirely on what you invest in and how those investments perform. A money market fund might earn 4% to 5%. A stock mutual fund might earn 8% to 12% in a good year or lose 15% in a bad one. There's no fixed return. Check your account statement to see what your specific investments earned.

What if I don't choose any investments for my IRA?

Your money will be placed in a default option, usually a money market fund or target-date fund, depending on your provider. It will earn whatever that default investment earns—typically 3% to 5% for money market funds. You can change this at any time by logging into your account and selecting different investments.

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

You can do either. Most people buy mutual funds or exchange-traded funds (ETFs) because they're diversified—one fund holds hundreds of stocks, so you're not betting everything on one company. Individual stocks require more research and carry more risk. Most IRA providers offer both options.