The main places your money can grow
Your money grows in three broad categories: savings accounts that pay interest, investments you buy and hold, and retirement accounts that offer tax breaks. Each one works differently, costs different amounts, and takes different amounts of time to show results. The right choice depends on when you need the money and how much risk you can handle losing some of it.
A savings account is the slowest but safest. You deposit money, the bank pays you interest (usually between 4% and 5% right now, though this changes), and you can pull it out whenever you need it. An investment account—stocks, bonds, mutual funds—can grow faster but the value goes up and down, sometimes sharply. A retirement account like a 401(k) or IRA lets you put money away and not pay taxes on the growth until you withdraw it decades later, which is why the money compounds faster.
The catch is that faster growth usually means more risk, and the money is often locked away longer. A high-yield savings account is boring but your money is safe. Stocks can double or lose half their value in a few years. Retirement accounts penalize you if you take the money out early. You have to decide what matters more: safety, speed, or tax savings.
Key Takeaways
- High-yield savings accounts currently pay 4% to 5% annual interest and let you withdraw money anytime without penalty.
- Stocks and stock mutual funds historically grow faster over decades but can lose value in the short term, and you pay taxes on gains when you sell.
- Bonds and bond funds are less volatile than stocks but pay lower returns, and are useful for balancing a portfolio.
- 401(k)s and IRAs grow tax-free until retirement, but withdrawing before age 59½ usually costs you 10% plus income tax on the amount.
- The best choice depends on when you need the money: savings for emergencies, stocks for 10+ years, retirement accounts for money you won't touch until later.
High-yield savings accounts for money you might need soon
A high-yield savings account is a bank account that pays you interest on your balance. Right now, rates range from about 4% to 5.35% depending on the bank, though rates change when the Federal Reserve adjusts its benchmark rate. You can open one at online banks like Marcus, Ally, American Express Bank, or Wealthfront, or at some brick-and-mortar banks. The money is insured by the FDIC up to $250,000, so you cannot lose it.
The trade-off is that the growth is slow compared to stocks. If you put $10,000 in a high-yield savings account at 5%, you earn about $500 in the first year. Over 10 years, you would have roughly $16,290. That is real growth, but inflation eats some of it. The point of a high-yield savings account is not to get rich—it is to earn something while keeping your money safe and available. Use this for an emergency fund, money for a down payment you plan to make in the next few years, or cash you know you will need.
The account is easy to open online in about 10 minutes. You link a checking account, transfer money in, and the interest starts accruing. Most high-yield savings accounts have no minimum balance and no monthly fees. You can withdraw whenever you want, though some banks limit you to six transfers per month (though this rule is rarely enforced now). Compare rates at Bankrate or DepositAccounts before you choose, because a difference of 0.5% matters on larger balances.
Stock and bond investments for longer time horizons
If you do not need the money for at least five to ten years, stocks historically outpace savings accounts and inflation. You can buy individual stocks (shares of one company), but most people are better off buying mutual funds or exchange-traded funds (ETFs), which bundle hundreds of stocks together so you are not betting everything on one company.
A simple starting point is a target-date fund or a total market index fund. A target-date fund automatically shifts from stocks to bonds as you get closer to retirement—you pick the year you plan to retire, and the fund does the rebalancing for you. A total market index fund (like VTSAX or VTI) holds a tiny piece of nearly every public company in the United States, so you own the whole market. Both have low fees, usually under 0.1% per year.
The downside is volatility. In 2022, the stock market fell about 18%. If you had $50,000 invested, it dropped to about $41,000. If you needed that money that year, you lost money. But if you left it alone, it recovered and grew. That is why stocks work best when you have years to wait—the longer you hold, the more likely you are to come out ahead. Bonds are less volatile than stocks but pay lower returns. They are useful if you want to reduce the ups and downs in your portfolio.
You buy stocks and funds through a brokerage account—companies like Fidelity, Vanguard, Charles Schwab, or M1 Finance. Opening an account takes about 15 minutes online. You link a bank account, transfer money in, and buy the funds you want. You pay taxes on any gains when you sell, and on dividends the funds pay out each year.
401(k)s and IRAs for retirement savings
A 401(k) is a retirement account your employer offers. You contribute money from your paycheck before taxes are taken out, so the money grows tax-free until you withdraw it in retirement. Many employers match a portion of what you contribute—if your employer matches 3%, and you contribute 3%, they add 3% of your salary to your account for free. That is an immediate 100% return on your money, and it is the single best reason to use a 401(k) if your employer offers one.
An IRA (Individual Retirement Account) is a retirement account you open on your own. There are two main types: a Traditional IRA works like a 401(k)—you contribute pre-tax money and pay taxes when you withdraw—and a Roth IRA where you contribute after-tax money but withdrawals in retirement are tax-free. For 2024, you can contribute up to $7,000 per year to an IRA (or $8,000 if you are 50 or older). You open an IRA at a brokerage like Vanguard, Fidelity, or Schwab, and you choose what to invest the money in—usually index funds or target-date funds.
The catch is that both accounts penalize you if you withdraw before age 59½. You pay a 10% penalty plus income tax on the amount you take out. There are a few exceptions—you can withdraw from a Roth IRA to buy your first home, or for certain medical expenses—but generally, money in these accounts should stay there until retirement. That is also why they grow so much: decades of compound growth without taxes eating into it every year.
If you are self-employed or a freelancer, a SEP IRA or Solo 401(k) lets you contribute much more—up to $69,000 per year in 2024. A SEP IRA is simpler to set up and manage; a Solo 401(k) has higher contribution limits but more paperwork.
Certificates of Deposit (CDs) for money you will not touch
A Certificate of Deposit (CD) is a savings product where you agree to leave your money in the account for a set period—three months, six months, one year, five years—in exchange for a higher interest rate than a regular savings account. Right now, a one-year CD might pay 4.5% to 5.5%, compared to 4% to 5.35% for a high-yield savings account. The longer you lock the money away, the higher the rate usually is.
The trade-off is that if you withdraw before the term ends, you pay a penalty—usually three to six months of interest. So a CD only makes sense if you know you will not need the money for that period. CDs are useful for money you are saving for a specific goal a year or two away, or for part of your emergency fund if you have enough cash elsewhere to cover immediate needs. You buy CDs at banks or through a brokerage. They are FDIC-insured up to $250,000.
Money market accounts and Treasury bills for very short-term money
A money market account is a hybrid between a checking account and a savings account. It usually pays interest similar to a high-yield savings account (4% to 5% right now) and lets you write checks or use a debit card, though there may be limits on how many withdrawals you can make per month. It is useful if you want your emergency fund to earn interest but also need quick access to the money.
Treasury bills (T-bills) are short-term loans you make to the U.S. government. You buy them for a term of four weeks, eight weeks, 13 weeks, 26 weeks, or 52 weeks, and the government pays you back with interest at the end. Right now, rates on T-bills are competitive with high-yield savings accounts—around 5% or slightly higher. You buy them directly from TreasuryDirect.gov with no fees, or through a brokerage. They are backed by the U.S. government, so they are extremely safe. The downside is that your money is locked in for the term you choose, and if you need it early, you have to sell on the secondary market, which may cost you.
How to decide where to put your money
Start by asking yourself three questions: When do I need this money? How much can I afford to lose? And what is my comfort level with watching the balance go up and down?
If you need the money within a year, use a high-yield savings account, money market account, or CD. The growth is modest, but you will not lose money and you can access it when you need it. If you have an emergency fund, this is where it goes.
If you will not need the money for five to ten years or longer, stocks or stock-heavy index funds make sense. You have time to ride out the bad years and benefit from the good ones. If you are uncomfortable with volatility, a balanced fund that mixes stocks and bonds can reduce the ups and downs.
If you are saving for retirement and your employer offers a 401(k), contribute enough to get the full employer match—that is assistance programs. Then, if you have more to save, open a Roth IRA and max it out if you can. If you are self-employed, a SEP IRA or Solo 401(k) lets you save much more. Retirement accounts are the most tax-efficient way to grow money over decades.
For most people, the best approach is a mix: an emergency fund in a high-yield savings account, retirement money in a 401(k) and IRA invested in index funds, and any other long-term savings in a taxable brokerage account also in index funds. This spreads your money across different time horizons and risk levels.
Frequently Asked Questions
What is the difference between a mutual fund and an ETF?
Both are baskets of stocks or bonds. A mutual fund is priced once per day after the market closes; an ETF trades throughout the day like a stock. ETFs usually have lower fees and are more tax-efficient. For a beginner, the difference is small—pick whichever has the lower fee and the fund type you want (total market, target-date, etc.).
Can I lose money in a high-yield savings account?
No. Your money is insured by the FDIC up to $250,000, and the bank pays you interest. The only way you lose purchasing power is if inflation rises faster than the interest rate, which is possible but rare. You cannot lose the dollar amount itself.
Should I pay off debt or invest?
If you have high-interest debt like credit cards (usually 15% to 25%), pay that off first—the may provide return from avoiding interest is higher than any investment return. For lower-interest debt like student loans or a mortgage, you can do both: contribute enough to a 401(k) to get the employer match, then put extra money toward debt.
How much should I keep in savings versus investments?
Most experts suggest three to six months of living expenses in a high-yield savings account as an emergency fund, plus any money you will need within five years. Everything else—money you will not touch for five years or longer—can go into investments. The longer your time horizon, the more you can afford to have in stocks.
What happens to my investments if the stock market crashes?
If you are holding index funds or mutual funds, the value drops, but you still own the same number of shares. If you do not sell, you keep waiting for the market to recover, which it historically has done. If you need the money right then, you lock in the loss. This is why stocks are only for money you will not need for years.