IRAs earn interest and growth through the investments you hold inside them, not from the account itself
An IRA account is a container — it does not generate interest on its own. The money inside earns returns based on what you invest it in. If you put cash in an IRA and leave it sitting there, it will not grow. If you buy a certificate of deposit (CD), bonds, stocks, or mutual funds inside the IRA, those investments produce interest, dividends, or capital gains. The IRA's job is to shelter those earnings from taxes until you withdraw the money.
The growth rate depends entirely on your investment choices. A money market fund inside an IRA might earn 4% to 5% annually (rates change with the Federal Reserve). A bond fund might earn 3% to 6%. Stock mutual funds have no may provide return — they can gain or lose value. You control what goes into the IRA, so you control how much it can earn.
Key Takeaways
- An IRA itself does not earn interest; the investments you buy inside it do, whether those are CDs, bonds, stocks, or funds.
- Money sitting in cash inside an IRA earns nothing, so most people invest it in something that generates returns.
- The tax advantage of an IRA is that earnings grow tax-deferred (Traditional IRA) or tax-free (Roth IRA), not that the account pays you interest.
- Different investments earn different returns: money market funds typically earn 4% to 5%, bonds 3% to 6%, and stocks have no may provide return.
- You can move money between investments inside your IRA without triggering taxes, so you can shift to higher-earning options if rates change.
The difference between Traditional and Roth IRAs on earnings
Both Traditional and Roth IRAs let your money grow without paying taxes on the earnings each year. The difference is when you pay taxes and whether you can withdraw earnings tax-free.
In a Traditional IRA, you do not pay taxes on the earnings while the money sits in the account. You pay income tax on the full amount (contributions plus earnings) when you withdraw it in retirement. This means your earnings compound faster because you are not sending part of each year's gains to the IRS.
In a Roth IRA, you pay taxes on the money before you put it in, but then the earnings grow completely tax-free. When you withdraw in retirement, you owe no tax on the earnings. If you expect to be in a higher tax bracket later, a Roth can save you more money over time.
Neither type of IRA pays you interest directly. Both simply let you keep more of what your investments earn by deferring or eliminating taxes on those gains.
Common investments inside IRAs and what they typically earn
You can hold almost any investment inside an IRA: stocks, bonds, mutual funds, exchange-traded funds (ETFs), CDs, and money market funds. Each has a different earning pattern.
| Investment Type | Typical Annual Return Range | How It Earns |
|---|---|---|
| Money Market Fund | 4% to 5% | Interest paid monthly; rate changes with Federal Reserve decisions |
| Certificate of Deposit (CD) | 4% to 5.5% | Fixed interest rate for a set term; rate locked in at purchase |
| Bond Fund | 3% to 6% | Interest payments plus potential price changes; varies by bond type |
| Stock Mutual Fund | Varies widely; no may provide | Dividends plus capital gains or losses; depends on market performance |
| Individual Stocks | Varies widely; no may provide | Dividends (if paid) plus price appreciation or depreciation |
The safest options — money market funds and CDs — offer lower but predictable returns. The riskier options — stocks and stock funds — can earn more over decades but can also lose value in the short term. Most people hold a mix to balance safety and growth potential.
How to choose what to invest in inside your IRA
Your choice depends on how long until you need the money and how comfortable you are with risk. If you are decades away from retirement, stocks and stock funds historically have outpaced inflation and bonds over long periods, even with their ups and downs. If you are within five to ten years of retirement, a mix of bonds and stocks is common. If you are already retired or nearly there, money market funds and CDs reduce the risk that a market downturn will force you to sell at a loss.
You do not have to pick one investment and stick with it. You can hold multiple investments inside a single IRA — for example, a stock fund, a bond fund, and a money market fund all in the same account. You can also move money between them without paying taxes or penalties, as long as you stay within your annual contribution limits.
Many IRA providers offer target-date funds, which automatically shift from stocks to bonds as you approach retirement. These are designed for people who want a simple, hands-off approach. Others offer robo-advisors that build and rebalance a portfolio based on your age and risk tolerance.
Why the IRA tax shelter matters more than the interest rate
The real advantage of an IRA is not that it pays high interest — it does not. The advantage is that you do not pay taxes on the earnings each year. Over decades, this compounds into significant savings.
Suppose you invest $10,000 in a stock fund that earns an average of 7% per year. In a regular taxable account, you might owe 15% to 20% in capital gains tax each year on those earnings, leaving you with roughly 5.6% to 6% net growth. In a Traditional IRA, the full 7% compounds without any tax drag until you withdraw. In a Roth IRA, the full 7% compounds and you never pay tax on it at all.
Over 30 years, that tax difference can add up to tens of thousands of dollars. This is why the IRA is valuable even if the interest rate on a money market fund inside it is the same as outside it — the tax shelter is the real benefit.
Moving money between investments inside your IRA
You can transfer money from one investment to another inside your IRA without triggering taxes or early withdrawal penalties. This is called a transfer or exchange, and most IRA providers let you do it online or by phone.
For example, if you have $50,000 in a stock fund and interest rates rise, you might move $20,000 into a CD earning 5% to lock in that rate while keeping the rest in stocks. Or if you are approaching retirement and want less risk, you can gradually shift from stocks to bonds. These moves do not count against your annual contribution limit and do not create a taxable event.
The only restriction is that you cannot do a rollover (moving money from one IRA to another) more than once per 12-month period. A transfer between investments inside the same IRA is different and has no limit.
What happens to earnings if you withdraw early
If you withdraw money from a Traditional IRA before age 59½, you owe income tax on the full amount you withdraw, plus a 10% early withdrawal penalty on the earnings portion. If you withdraw from a Roth IRA before age 59½, you can withdraw your contributions tax-free (since you already paid tax on them), but you owe tax and penalty on the earnings.
There are some exceptions: you can withdraw from either type of IRA without penalty if you are disabled, if you use the money for a first-time home purchase (up to $10,000 lifetime), or if you are paying substantial medical expenses. But in most cases, early withdrawal means giving up both the earnings and a chunk of your principal to taxes and penalties.
This is why it matters what you invest in inside your IRA. If you put money in a volatile stock fund and need it in five years, you might be forced to sell at a loss and then pay penalties on top. If you put it in a CD or money market fund, you know exactly what you will have when you need it.
Frequently Asked Questions
Can I keep cash in my IRA without investing it?
Yes, but it will not earn anything. Most IRA providers hold cash in a non-interest-bearing account by default. If you want your cash to earn returns, you need to move it into a money market fund, CD, or other investment. Some providers offer sweep accounts that automatically move idle cash into a money market fund earning current rates.
Do I have to reinvest dividends and interest in my IRA?
No, but most people do. You can set dividends and interest to reinvest automatically, which compounds your growth. Or you can let them sit as cash in your IRA. Either way, you do not pay taxes on them until you withdraw from the IRA.
What if my IRA investments lose money?
You do not owe taxes on losses inside an IRA. If a stock fund drops 20% in value, you have lost money, but you have not triggered any tax event. You can hold until it recovers, move the money to a different investment, or withdraw it (though early withdrawal penalties still apply if you are under 59½).
Can I move my IRA to a different provider if I find better interest rates?
Yes, through a direct rollover. Contact the new provider and ask them to initiate the transfer. The old provider sends the money directly to the new one, and no taxes are due. You can do this as often as you want, though it may take one to two weeks to complete.
Is there a limit to how much my IRA can earn?
No. There is no cap on earnings. Your IRA can grow as large as your investments allow. The only limits are on how much you can contribute each year (currently $7,000 for people under 50, $8,000 for people 50 and older, though these amounts change periodically) and on when you can withdraw without penalty.