An IRA itself does not earn interest — the investments inside it do

An Individual Retirement Account (IRA) is a container, not an investment. The account earns nothing on its own. The money you put into it earns returns based on what you choose to invest in: stocks, bonds, mutual funds, certificates of deposit (CDs), or cash. A traditional or Roth IRA held at a bank earning 0.01% in a savings account will grow almost nothing. The same IRA invested in a stock index fund may grow 7% to 10% per year on average, though with more volatility. You control what goes inside the account, and that choice determines whether your money grows slowly or faster.

The tax advantage of an IRA is not about earning more interest — it is about keeping more of what you earn. Money inside an IRA grows without being taxed each year. In a regular taxable account, you owe tax on interest, dividends, and capital gains as they happen. In an IRA, that tax bill is delayed (traditional IRA) or never happens (Roth IRA). Over decades, this tax shelter makes a real difference in how much you end up with, even if the underlying investments earn the same returns.

Key Takeaways

  • An IRA is a tax-sheltered account structure; the investments inside it — stocks, bonds, CDs, or funds — are what actually earn returns.
  • You choose what to invest in, so a CD-based IRA earns a fixed rate while a stock-based IRA earns variable returns tied to market performance.
  • The real benefit of an IRA is that earnings grow tax-deferred (traditional) or tax-free (Roth), not that the account itself pays interest.
  • Different IRA providers offer different investment options, so comparing what you can invest in matters more than comparing interest rates.

What investments you can hold inside an IRA

Most IRA providers let you choose from a menu of investments. A bank-based IRA typically offers savings accounts, money market accounts, and CDs. A brokerage-based IRA offers stocks, bonds, mutual funds, exchange-traded funds (ETFs), and sometimes individual bonds or Treasury securities. Some providers allow self-directed IRAs, which open the door to real estate, private loans, or other alternative investments, though these come with higher fees and more paperwork.

The rate or return you see depends entirely on what you pick. A CD in an IRA might pay 4% to 5% annually (rates vary by provider and term). A bond fund might pay 3% to 6% depending on which bonds it holds. A stock index fund has no fixed rate — it might gain 8% one year and lose 5% the next. You are not locked into one choice either; you can move money between investments within the same IRA without tax consequences, though some providers charge a transaction fee.

How interest and growth compound over time in an IRA

The longer money sits in an IRA, the more the tax shelter matters. Suppose you invest $6,500 per year in a traditional IRA for 30 years, earning an average of 7% per year. In a taxable account, you would owe tax on dividends and gains each year, shrinking what compounds. In an IRA, every dollar of earnings stays in the account and compounds on itself. By retirement, that difference can add up to tens of thousands of dollars.

The math is straightforward: more frequent compounding and no annual tax drag means your money grows faster. A CD earning 4.5% in an IRA will compound monthly or daily depending on the bank's terms. A stock fund earning 7% compounds as the fund reinvests dividends and gains. Neither earns "interest" in the traditional sense — the IRA earns whatever its investments earn — but the tax-deferred growth amplifies the effect over time.

Comparing IRA providers based on investment options

When choosing where to open an IRA, the investment menu matters more than the account name. A bank advertising "IRA savings accounts" may offer only savings accounts and CDs, limiting your options. A brokerage like Fidelity, Vanguard, or Charles Schwab offers thousands of mutual funds and ETFs with no transaction fees. A robo-advisor IRA automatically builds and rebalances a portfolio for you, charging a small annual fee (usually 0.25% to 0.50% of assets).

If you want simplicity and safety, a CD-based IRA at a bank works fine — you know exactly what rate you are earning and when. If you want growth potential and are comfortable with market risk, a brokerage IRA gives you access to stocks and diversified funds. If you want hands-off management, a robo-advisor handles the decisions for you. None of these is "better" — it depends on your risk tolerance, time horizon, and how much time you want to spend managing the account.

The difference between traditional and Roth IRA tax treatment

Both traditional and Roth IRAs shelter earnings from annual tax, but the timing differs. In a traditional IRA, you may deduct contributions from your taxable income in the year you make them (depending on income and whether you have a workplace retirement plan). The money grows tax-deferred. When you withdraw it in retirement, you pay income tax on the full amount — contributions plus all earnings. In a Roth IRA, contributions are made with after-tax dollars, so you get no deduction now. But the money grows tax-free, and withdrawals in retirement are tax-free too.

For earnings growth, the practical difference is this: a traditional IRA lets you invest more money upfront (because you get a tax deduction), while a Roth IRA lets you withdraw more money in retirement (because withdrawals are tax-free). Both shelter earnings from year-to-year taxation. The choice between them depends on whether you expect to be in a higher or lower tax bracket in retirement, not on which account earns more interest.

How to choose between fixed returns and market-based returns

A CD in an IRA offers certainty: you know the rate, you know the term, and your principal is insured by the FDIC up to $250,000. The trade-off is that CD rates are usually lower than the long-term average return of stocks. A CD paying 4.5% for five years locks in that rate; a stock fund averaging 7% per year might earn 12% one year and lose 8% the next.

For money you will not need for 20 or 30 years, market-based investments (stocks and stock funds) have historically outpaced fixed-rate investments over long periods, despite short-term volatility. For money you will need within five years, or if you cannot tolerate seeing your balance drop in a down market, CDs or bonds are more appropriate. Many people split the difference: keep a few years of spending money in a CD or bond fund, and invest the rest in stocks. An IRA lets you do this within a single account.

Frequently Asked Questions

Can I move money between investments in my IRA without paying tax?

Yes. Moving money from one investment to another within the same IRA — from a CD to a stock fund, for example — is not a taxable event. Some providers charge a transaction fee, but there is no tax consequence. You can do this as often as you want. If you move money to a different IRA provider entirely (a rollover), that is also tax-free as long as you follow the rules: the old provider sends the money directly to the new provider, or you deposit it within 60 days.

What happens to my IRA earnings if the market drops?

If your IRA holds stocks or stock funds and the market drops, your account balance drops too — on paper. You have not lost money unless you sell. If you hold the investments and the market recovers, your balance recovers as well. This is why IRAs are best for money you will not need for at least five to ten years. If you cannot tolerate seeing your balance fall, keep a larger portion in CDs or bonds instead.

Do I have to pick one investment for my whole IRA?

No. You can split your IRA balance across multiple investments. Many people keep 20% in a CD earning 4.5% and 80% in a diversified stock fund. Some use target-date funds, which automatically shift from stocks to bonds as you approach retirement. You can change this mix whenever you want without tax consequences.

Is the interest rate on an IRA CD different from a regular CD?

The rate is usually the same or very close. The difference is the tax treatment: interest earned in an IRA CD is not taxed each year, while interest in a regular CD is. Over time, this tax shelter makes the IRA CD grow more, even at the same rate. Some banks offer slightly different rates for IRA CDs versus regular CDs, so it is worth comparing.

Can I earn interest on cash sitting in my IRA?

Yes, if your IRA provider offers a money market account or savings account. The rate is usually very low — often under 0.5% — but the money is safe and available if you need it. Most people do not keep large amounts in cash within an IRA because the tax shelter is wasted on such low returns. Cash in an IRA makes sense only as a temporary holding place while you decide where to invest, or for emergency access.