Interest is how a savings account makes money for you
A savings account earns money through interest—a percentage of your balance that the bank pays you regularly, usually monthly or daily. The bank uses your deposited money to lend to other customers and invests it; they share a portion of what they earn back to you as interest. The amount you earn depends on three things: how much money you keep in the account, how long it stays there, and the interest rate the bank offers.
The interest rate varies widely between banks and account types. A traditional bank might offer 0.01% annual interest, meaning $10,000 would earn about $1 per year. A high-yield savings account at an online bank might offer 4% to 5%, meaning the same $10,000 would earn $400 to $500 per year. The difference matters: over five years, that's $5 versus $2,000 on the same deposit.
Interest compounds, which means you earn money on your interest too. If your account compounds daily, the bank calculates interest each day and adds it to your balance, so tomorrow's interest calculation includes today's interest earnings. Monthly compounding is more common and still builds your balance faster than straightforward interest would.
Key Takeaways
- High-yield savings accounts typically pay 4% to 5% annual interest, while traditional bank savings accounts often pay less than 0.1%.
- The interest rate, your account balance, and how long money stays in the account determine how much you earn.
- Money market accounts and certificates of deposit offer higher rates than savings accounts but come with restrictions on how often you can withdraw.
- Your deposits are insured up to $250,000 per account type at FDIC-insured banks, so your principal is protected even if the bank fails.
- Interest earnings are taxable income, and you'll receive a 1099-INT form from your bank if you earn $10 or more in a year.
High-yield savings accounts pay significantly more than traditional savings accounts
A high-yield savings account is a savings account offered by online banks or credit unions that pays a much higher interest rate than you'll find at a brick-and-mortar bank. Online banks have lower overhead costs—no physical branches to maintain—so they pass savings to customers through higher rates. These accounts function identically to regular savings accounts: you deposit money, it earns interest, and you can withdraw it, usually without penalty.
The catch is access. High-yield accounts typically limit you to six withdrawals per month (though this rule is less strictly enforced now than it once was), and transfers to external accounts may take one to three business days. If you need money when ready, a high-yield account is less convenient than a checking account. But if the money will sit untouched for months or years, the higher rate makes the slower access irrelevant.
Current rates at high-yield accounts change frequently based on Federal Reserve decisions. When the Fed raises its benchmark rate, banks raise savings rates within weeks. When the Fed cuts rates, savings rates drop. Checking the current rates at banks like Marcus, Ally, or American Express Personal Savings before opening an account is necessary—rates posted online may be outdated within days.
Money market accounts and CDs offer higher rates but with trade-offs
A money market account is a hybrid between a savings account and a checking account. It typically pays interest higher than a regular savings account but lower than a high-yield savings account. You get a debit card and checkbook, so you can access your money more easily than with a savings account, but you're still limited to six withdrawals per month. Money market accounts make sense if you want both earning potential and regular access, though the rate advantage over high-yield savings has narrowed in recent years.
A certificate of deposit (CD) pays a fixed interest rate for a set period—three months, six months, one year, or longer. The longer you commit to leaving money untouched, the higher the rate. A one-year CD might pay 4.5%, while a five-year CD might pay 5%. The trade-off is that withdrawing money before the term ends triggers a penalty, usually a few months' worth of interest. CDs work well for money you know you won't need for a specific period.
If you have multiple savings goals with different timelines, you can use a CD ladder: deposit equal amounts into CDs that mature at different times. As each CD matures, you can renew it at the current rate or move the money elsewhere. This strategy lets you lock in higher rates while maintaining access to portions of your money at regular intervals.
How much you actually earn depends on your balance and the rate
The formula for annual interest is straightforward: balance multiplied by the annual rate equals yearly earnings. A $5,000 balance at 4% earns $200 per year. A $50,000 balance at the same rate earns $2,000. The relationship is linear—double your balance, double your earnings.
Time matters equally. Money that sits in an account for a full year earns the full annual rate. Money deposited halfway through the year earns roughly half. If you deposit $10,000 on July 1 into an account paying 4% annually, you'll earn approximately $200 by the following July 1, but only about $100 by December 31 of that same year.
Compounding accelerates earnings over longer periods. At 4% annual interest compounded daily, $10,000 becomes $10,408 after one year, $10,833 after two years, and $12,214 after five years. The difference between daily and monthly compounding is small—usually less than $10 per year on typical balances—but it adds up over decades. This is why starting early with savings, even small amounts, builds wealth faster than waiting.
Your money is protected by FDIC insurance up to $250,000
The Federal Deposit Insurance Corporation (FDIC) insures deposits at member banks up to $250,000 per account type per bank. This means if the bank fails, you get your money back, up to that limit. Savings accounts, checking accounts, and money market accounts are each insured separately, so you could have $250,000 in a savings account and another $250,000 in a checking account at the same bank and both would be fully protected.
CDs are also FDIC-insured. If you have multiple CDs at the same bank, they're added together for insurance purposes—so five $50,000 CDs at one bank would total $250,000 in coverage. If you want to protect more than $250,000, you can open accounts at different FDIC-insured banks or use different account ownership categories (individual, joint, retirement accounts are insured separately).
Credit unions use NCUA insurance instead of FDIC insurance, but the coverage is identical: $250,000 per account type per institution. Online banks are FDIC-insured just like traditional banks. Before opening an account, confirm the institution is FDIC or NCUA insured—most are, but some online platforms are not.
Interest income is taxable and reported on your tax return
Interest you earn on savings accounts is ordinary income and must be reported on your federal tax return. If you earn $10 or more in interest during a calendar year, your bank sends you a Form 1099-INT by January 31 of the following year. You report this amount on your tax return, and it's taxed at your ordinary income tax rate, which varies based on your total income and filing status.
If you earn less than $10 in interest, the bank doesn't send a 1099-INT, but you're still required to report the interest on your return if you file one. Keeping records of interest earned throughout the year makes tax time simpler. Many online banking platforms show year-to-date interest in your account dashboard.
The tax impact means that a 4% interest rate isn't a 4% gain if you're in the 22% tax bracket—it's closer to 3.1% after taxes. This is one reason high-yield accounts matter: even after taxes, 4% beats 0.01% by a wide margin. For large balances, the tax-advantaged accounts to consider are retirement accounts like IRAs or 401(k)s, where interest grows tax-deferred or tax-free, though these have contribution limits and withdrawal restrictions.
Comparing accounts: what to look for when choosing where to keep your money
| Account Type | Typical Rate | Withdrawal Limits | Best For |
|---|---|---|---|
| Traditional Savings | 0.01% to 0.05% | 6 per month | Convenience over earnings |
| High-Yield Savings | 4% to 5% | 6 per month (flexible) | Maximum earnings, minimal access needs |
| Money Market | 2% to 4% | 6 per month, debit card access | Balance of earnings and access |
| CD (1-year) | 4% to 5% | None until maturity | Money you won't need for a set period |
When comparing accounts, look beyond the headline rate. Check whether the rate is promotional (temporary) or standard. Read the fine print about minimum balance requirements—some accounts pay the advertised rate only if you maintain a certain balance. Confirm the bank is FDIC-insured. Look at how the bank compounds interest (daily is better than monthly) and whether there are monthly fees that would eat into your earnings.
If you have a small balance—under $1,000—the difference between a 0.5% account and a 4% account is only about $35 per year. The convenience of a local bank might outweigh that. If you have $10,000 or more, the difference becomes substantial enough to justify switching to a higher-rate account. Use an online calculator to see what your specific balance would earn at different rates before deciding.
Frequently Asked Questions
Can I move money between savings accounts without losing interest?
Yes. Transferring money between your own accounts at different banks doesn't affect interest earned. Interest is calculated daily on your balance, so moving $5,000 from one account to another doesn't reset anything—you straightforward stop earning interest on that $5,000 at the first bank and start earning it at the second. The transfer itself takes one to three business days, but interest accrues during that time.
What happens to my interest if the bank lowers its rate?
For savings accounts and money market accounts, the bank can lower the rate at any time without penalty. You don't have to accept the new rate—you can move your money to another bank. For CDs, your rate is locked in for the entire term, so rate cuts don't affect you. When your CD matures, you'll see the new market rate if you renew.
Is it better to have one large savings account or split money across multiple accounts?
From an earnings perspective, it doesn't matter—$10,000 in one account earns the same as $10,000 split across two accounts at the same rate. Splitting can be useful for organization (emergency fund in one account, vacation savings in another) or for maximizing FDIC insurance if you have more than $250,000. Some people use separate accounts to make it psychologically harder to spend money earmarked for a specific goal.
Do I need a minimum balance to earn interest?
Most high-yield savings accounts have no minimum balance requirement and pay interest on every dollar, even if you have $1 in the account. Some traditional banks require a minimum balance—often $500 to $2,500—to earn any interest at all. Check the account terms before opening. If you can't maintain the minimum, the account won't pay interest regardless of how long your money sits there.
Can I use a savings account to build credit?
No. Savings accounts don't appear on your credit report and don't affect your credit score. Banks don't report savings account activity to credit bureaus. Credit is built through credit cards, loans, and payment history. A savings account is purely for storing and growing money, not for credit building.