A Roth IRA doesn't earn interest the way a savings account does—it holds investments that grow in value

A Roth IRA is a container for investments, not an investment itself. The money inside doesn't sit in a vault earning a fixed interest rate. Instead, you choose what goes into it—stocks, bonds, mutual funds, exchange-traded funds (ETFs)—and those holdings generate returns through price appreciation, dividends, or interest paid by bonds. The growth rate depends entirely on what you own and how those investments perform.

If you want your Roth IRA to earn interest specifically, you can hold bonds or bond funds inside it, or keep cash in a money market fund. But most people use a Roth IRA to hold stocks or diversified funds because stocks historically return more over decades than bonds or cash. The tax advantage of a Roth IRA—tax-free growth and withdrawals in retirement—makes it a powerful place to hold investments that would otherwise generate taxable gains.

Key Takeaways

  • A Roth IRA holds investments you choose; it does not earn a set interest rate like a savings account.
  • You can hold bonds, bond funds, or money market funds inside a Roth IRA if you want interest-bearing assets, but most investors use it for stocks or diversified funds.
  • All growth inside a Roth IRA—whether from stock gains, dividends, or bond interest—is tax-free as long as you follow withdrawal rules.
  • Your Roth IRA custodian (your brokerage) determines what investment options are available to you.
  • The growth rate of your Roth IRA depends on your investment choices and market performance, not on the account type itself.

What investments can go inside a Roth IRA

Your Roth IRA custodian—the brokerage or bank holding your account—sets the menu of what you can buy. Most major brokerages (Fidelity, Vanguard, Charles Schwab, E-Trade, and others) allow you to hold individual stocks, mutual funds, ETFs, bonds, and sometimes options or CDs. Some smaller institutions or banks limit you to their own products.

If you want interest-bearing holdings, you have real options. A bond fund or bond ETF pays interest that accumulates inside your Roth IRA tax-free. A money market fund holds very short-term debt and pays a yield that changes with interest rates. A certificate of deposit (CD) held inside a Roth IRA earns a fixed rate for a set term. Individual bonds also work—you buy them once and collect coupon payments until maturity. None of these generate taxes on the interest while it sits in your Roth IRA.

Most investors, though, hold a mix: perhaps 70% in stock funds and 30% in bond funds, or 100% in a target-date fund that automatically shifts from stocks to bonds as you approach retirement. The mix you choose determines your expected return and your risk.

How tax-free growth works inside a Roth IRA

The real power of a Roth IRA is not the interest rate—it is the tax treatment. If you held the same investments outside a Roth IRA, you would owe taxes on the gains each year. A stock fund that pays dividends? You owe tax on those dividends. A bond fund that pays interest? Tax on that interest. Sell a stock at a profit? Capital gains tax. Inside a Roth IRA, none of that triggers a tax bill while the money stays in the account.

This matters most for investments that generate a lot of taxable income or turn over frequently. A bond fund inside a Roth IRA keeps all its interest. A stock fund inside a Roth IRA keeps all its dividends and all its gains. Over 30 or 40 years, that tax-free compounding adds up to a much larger balance than the same investments held in a regular taxable brokerage account.

When you withdraw money in retirement (after age 59½, and after your account has been open at least five years), you owe no tax on any of it—not the contributions you put in, not the growth, not the interest. That is the Roth advantage.

Interest rates and yields change with market conditions

If you hold bonds or a bond fund inside your Roth IRA, the interest rate you receive is not fixed by the account type. It depends on what the bond market is paying. When the Federal Reserve raises interest rates, new bonds pay higher yields. When rates fall, new bonds pay lower yields. A bond fund you own will fluctuate in value as rates change, even though it is inside a Roth IRA.

Money market funds work the same way. Their yield moves with short-term interest rates. In 2023 and 2024, money market funds paid 4% to 5% because the Fed kept rates high. In 2021, they paid close to 0%. Your Roth IRA custodian does not set these rates; the market does.

If you want a may provide rate, a CD inside a Roth IRA locks in a fixed yield for a set period—typically three months to five years. But even CD rates vary by institution and by when you buy. Your custodian's CD rates are posted on their website and change regularly.

How to choose investments for your Roth IRA

Start by deciding how much risk you can tolerate and how long until you need the money. If you are in your 20s or 30s and will not touch the account for 30+ years, stocks or stock funds historically deliver the highest returns, even though they fluctuate. If you are within 10 years of retirement, a mix of stocks and bonds reduces the chance you will need to sell stocks during a market downturn.

A target-date fund does this automatically. You pick the fund labeled with your expected retirement year (like "Target Date 2055"), and the fund shifts from mostly stocks when you are young to mostly bonds as you approach that year. You do not have to rebalance or think about it.

If you want simplicity and do not want to pick individual investments, a total stock market index fund or total bond market index fund gives you broad diversification with low fees. Vanguard, Fidelity, and Schwab all offer these. If you want to build your own mix, you can hold both and adjust the split yourself.

Do not chase yield. A money market fund paying 5% sounds good, but it will pay less when rates fall. A bond fund paying 4% will fluctuate in value. A stock fund paying 2% in dividends might grow 8% or 10% per year over time, or it might fall 20% in a bad year. The right choice depends on your timeline and comfort with ups and downs, not on the highest advertised rate.

Common mistakes people make with Roth IRAs

One mistake is leaving your Roth IRA in cash or a money market fund for years because you think it is "safe." Cash is safe from market swings, but it loses purchasing power to inflation and misses decades of potential growth. If you will not need the money for 20 years, holding it in cash inside a Roth IRA wastes the account's biggest advantage: tax-free compounding of investment gains.

Another mistake is over-concentrating in a single stock or a narrow sector. Your Roth IRA is a long-term account, and diversification reduces the risk that one bad investment tanks your balance. A fund that holds hundreds or thousands of stocks spreads that risk.

A third mistake is trading too much. Every time you sell an investment at a gain inside a Roth IRA, you lock in that gain—but you do not owe tax on it. That is actually fine. But frequent trading costs money in commissions or bid-ask spreads, and it often underperforms a buy-and-hold approach. Inside a Roth IRA, you have no tax reason to trade, so do not create one.

Frequently Asked Questions

Can I move money between investments inside my Roth IRA without paying taxes?

Yes. Selling one fund and buying another inside your Roth IRA does not trigger any tax, even if you sell at a gain. That is one of the benefits of holding investments in a Roth IRA. You can rebalance, switch strategies, or move to a different investment without worrying about capital gains tax.

What happens if my Roth IRA investments lose money?

You do not owe tax on losses either. If a stock fund drops 20%, that loss stays inside your Roth IRA and does not reduce your taxes. You can only use investment losses to offset gains if you hold the investments outside a Roth IRA. Inside a Roth IRA, losses are simply losses—they reduce your account balance, but they do not create a tax deduction.

Is a Roth IRA better than a high-yield savings account for earning interest?

For short-term savings (money you need within a few years), a high-yield savings account is better because it is liquid and safe. For long-term retirement savings (10+ years away), a Roth IRA is better because you can hold investments that historically return more than savings account rates, and all that growth is tax-free. You can also hold a money market fund inside a Roth IRA if you want interest-bearing safety, though the rate will be lower than stocks over decades.

Do I have to pick my investments when I open a Roth IRA?

No. You can open a Roth IRA and leave the money in a money market fund or cash while you decide. But do not leave it there indefinitely. Once you have decided on a strategy, move the money into investments that match your timeline and goals. The longer money sits uninvested, the more growth you miss.

Can I hold both bonds and stocks in the same Roth IRA?

Yes. Most investors hold a mix of both inside one Roth IRA. You might own a stock fund and a bond fund in the same account, or a single target-date fund that holds both. Your custodian allows multiple holdings in one account.