What you earn depends on the bank, the account type, and the current rate environment
The amount of interest you earn in a savings account is determined by three things: the Annual Percentage Yield (APY) the bank offers, how much money you keep in the account, and how long it stays there. A bank offering 4.50% APY on a savings account will pay you roughly $45 per year on a $1,000 balance. A bank offering 0.01% APY will pay you about 10 cents on that same $1,000. The difference between these two is real money, and it matters which bank you choose.
Banks set their own rates based on what the Federal Reserve does with its benchmark rate, what other banks are offering, and how much they need to attract deposits. When the Fed raises rates, savings rates typically rise within weeks or months. When the Fed cuts rates, banks lower their savings rates too—sometimes immediately. This means the rate you see today may not be the rate you earn six months from now.
Key Takeaways
- The interest you earn is calculated by multiplying your balance by the APY and dividing by 365 days, so a higher APY on a larger balance produces noticeably more money.
- Online banks typically offer higher APYs than brick-and-mortar banks because they have lower overhead costs.
- Banks can change their rates at any time, and most will lower rates when the Federal Reserve cuts its benchmark rate.
- Money market accounts and high-yield savings accounts often pay more than regular savings accounts at the same bank.
How banks calculate the interest you receive
Banks use a formula: your balance multiplied by the APY, divided by 365. If you have $10,000 in an account earning 4.50% APY, you earn roughly $450 per year, or about $1.23 per day. Most banks deposit interest monthly, so you would see roughly $37.50 added to your account each month (though the exact amount varies slightly depending on the number of days in each month).
Interest compounds, meaning you earn interest on the interest you already earned. If your bank compounds daily—which most do—the interest deposited each month includes a tiny amount of interest earned on previous interest. Over a year, this compounding effect is small. Over decades, it becomes significant. A $10,000 balance at 4.50% APY grows to $10,450 after one year with monthly compounding; after ten years it grows to $14,866.
The rate you see advertised is the APY, which already includes the effect of compounding. You do not need to calculate compounding yourself—the APY number is what you actually earn.
Why online banks pay more than traditional banks
Online banks typically offer APYs 1% to 2% higher than brick-and-mortar banks. A traditional bank might offer 0.01% while an online bank offers 4.50% on the same type of account. The reason is cost: online banks have no physical branches, no tellers, and lower overhead. They pass those savings to customers in the form of higher rates. They also compete fiercely for deposits because they cannot rely on foot traffic or existing customer relationships.
Traditional banks keep rates low partly because they do not need to compete as hard for deposits—customers come in for mortgages, checking accounts, and loans, and the bank captures their savings as a side benefit. Online banks have no other products to sell, so they must offer attractive rates to win your money.
This does not mean online banks are riskier. Most are FDIC-insured just like traditional banks, meaning your deposits are protected up to $250,000 per account type per bank. The trade-off is convenience: you cannot walk into a branch, but you also earn significantly more interest.
How current rates compare across account types
Savings account rates vary widely depending on the account type and the bank. High-yield savings accounts at online banks currently range from roughly 4.00% to 5.35% APY. Regular savings accounts at traditional banks range from 0.01% to 0.50% APY. Money market accounts—which function like savings accounts but may require a higher minimum balance—often pay rates similar to high-yield savings accounts, sometimes slightly higher.
Certificates of Deposit (CDs) typically pay more than savings accounts because you agree to lock your money away for a set period (three months to five years). A one-year CD might pay 4.75% to 5.35% APY, while a five-year CD might pay 4.50% to 5.00%. The longer you lock your money away, the rate does not always increase—it depends on what the bank expects rates to do in the future.
The difference between a 4.50% savings account and a 0.01% savings account is $449 per year on a $10,000 balance. Over five years, that difference compounds to roughly $2,300 in lost earnings. Choosing the right account type and bank matters.
What happens when the Federal Reserve changes rates
When the Federal Reserve raises or lowers its benchmark rate, banks adjust their savings rates within days or weeks. The Fed does not directly set savings account rates—banks choose their own—but banks watch the Fed closely because it signals where the economy is heading. A Fed rate increase usually means banks will raise savings rates to compete for deposits. A Fed rate cut usually means banks will lower savings rates.
The lag between a Fed move and a bank's response varies. Some online banks raise rates within 24 hours of a Fed increase. Traditional banks may take weeks. When rates fall, banks often cut savings rates faster than they raised them, because they are eager to reduce what they pay depositors.
This means the rate you lock in today may not be the rate you earn next year. If you are in a high-rate environment and rates are expected to fall, locking money into a CD can protect your earnings. If rates are expected to rise, keeping money in a flexible savings account lets you benefit from higher rates as they come.
Comparing what you earn across different balances and timeframes
| Balance | APY | Annual Interest | Interest After 5 Years |
|---|---|---|---|
| $1,000 | 4.50% | $45 | $246 |
| $10,000 | 4.50% | $450 | $2,460 |
| $50,000 | 4.50% | $2,250 | $12,300 |
| $100,000 | 4.50% | $4,500 | $24,600 |
The table above shows how balance size affects your earnings at a single rate. A larger balance earns proportionally more interest. The five-year column assumes you do not withdraw money and that the rate stays constant—in reality, rates change, so your actual earnings may be higher or lower.
If you have $100,000 earning 4.50% APY, you earn $4,500 per year. If that same money were in an account earning 0.01% APY, you would earn only $10 per year—a difference of $4,490 annually. Over five years, choosing the right account costs or saves you roughly $22,000 in interest.
Factors that reduce the interest you earn
Some savings accounts charge monthly maintenance fees, which reduce your net interest earnings. A $5 monthly fee ($60 per year) on a $10,000 balance earning 4.50% APY cuts your net earnings from $450 to $390. Always check whether an account has fees and whether they can be waived by maintaining a minimum balance or setting up direct deposit.
Taxes also reduce what you keep. Interest earned in a regular savings account is taxed as ordinary income at your marginal tax rate. If you earn $450 in interest and your tax rate is 24%, you owe $108 in taxes, leaving you with $342 in after-tax earnings. Tax-advantaged accounts like IRAs can hold savings accounts and avoid this tax hit, but they have contribution limits and withdrawal restrictions.
Inflation erodes the purchasing power of your savings. If you earn 4.50% interest but inflation is 3.50%, your real return (the amount your money actually grows in purchasing power) is only 1.00%. This is why comparing rates matters—a higher rate protects you better against inflation.
Frequently Asked Questions
Can I move my money to a higher-rate account if my bank lowers rates?
Yes. Banks can change rates at any time, and you can move your money to another bank whenever you want. There is no penalty for closing a savings account and opening one elsewhere. Many people move their money when rates drop to capture higher rates at competing banks. The only exception is CDs—if you withdraw before the maturity date, you typically pay an early withdrawal penalty.
What is the highest savings rate I can find right now?
Rates change constantly and vary by bank. As of early 2024, high-yield savings accounts at online banks range from roughly 4.00% to 5.35% APY. Traditional banks typically offer 0.01% to 0.50%. Check current rates at multiple banks before opening an account, because even a 0.50% difference adds up over time.
Does keeping more money in savings earn me more interest?
Yes. Interest is calculated on your balance, so a $50,000 balance earns roughly five times as much interest as a $10,000 balance at the same APY. There is no upper limit on how much interest you can earn, though FDIC insurance only covers up to $250,000 per account type per bank.
Will my interest rate stay the same, or can the bank change it?
Banks can change savings account rates at any time without notice. Most will lower rates when the Federal Reserve cuts its benchmark rate. If you want a may provide rate, open a CD—the rate is locked in for the term you choose (three months to five years, depending on the bank).
Is the interest I earn on savings taxable?
Yes. Interest earned in a regular savings account is taxed as ordinary income. Banks report interest over $10 on Form 1099-INT, which you report on your tax return. Money in tax-advantaged accounts like IRAs or 529 plans may grow tax-free, depending on the account type and how you use the money.