What you earn depends on the bank's rate and how long you leave money in
A high-yield savings account pays you interest on the money you deposit, but the amount varies by bank and changes over time. The rate you see advertised—often called the APY, or annual percentage yield—tells you what percentage of your balance you'll earn in a year if the rate stays the same. A bank offering 4.50% APY means that on $10,000, you'd earn roughly $450 over twelve months, though the actual amount depends on how often the bank compounds interest and whether the rate changes.
The catch is that rates move constantly. When the Federal Reserve raises or lowers its benchmark rate, banks adjust what they pay depositors within days or weeks. An account paying 5.00% today might pay 4.25% in three months. The banks that pay the highest rates now are usually online-only institutions with lower overhead costs—they pass some of that savings to you as higher interest.
Key Takeaways
- The APY shown on a savings account tells you the yearly interest rate, but only if that rate doesn't change during the year.
- Online banks typically pay 4% to 5% APY, while traditional brick-and-mortar banks often pay under 0.50% APY on the same type of account.
- Interest compounds daily or monthly depending on the bank, meaning you earn small amounts of interest on your interest.
- Your actual earnings depend on your balance, how long you keep the money in the account, and whether the rate changes.
- Switching to a higher-rate account can add hundreds of dollars per year to a five-figure balance, but moving money takes a few business days.
How the math works with real numbers
If you have $25,000 in a high-yield savings account paying 4.75% APY, you'd earn roughly $1,187.50 over one year—that's $25,000 multiplied by 0.0475. But that's only if the rate stays at 4.75% for the full twelve months, which almost never happens. If the rate drops to 4.00% after six months, your actual earnings would be lower: about $562.50 for the first half-year, then about $500 for the second half, totaling roughly $1,062.50.
The bank compounds your interest, usually daily or monthly. Compounding means you earn interest on the interest you've already earned. With daily compounding, the bank divides the annual rate by 365, calculates what you've earned that day, adds it to your balance, and uses that new balance to calculate the next day's interest. Over a year, daily compounding adds a small amount compared to annual compounding—usually less than 0.05% extra—but it's real money.
Here's a comparison table showing what different balances earn at different rates over one year, assuming the rate doesn't change:
| Balance | At 4.00% APY | At 4.75% APY | At 5.25% APY |
|---|---|---|---|
| $5,000 | $200 | $237.50 | $262.50 |
| $15,000 | $600 | $712.50 | $787.50 |
| $50,000 | $2,000 | $2,375 | $2,625 |
| $100,000 | $4,000 | $4,750 | $5,250 |
Why rates differ so much between banks
Online banks pay more because they don't operate physical branches. They save money on rent, staff, and equipment, and they pass part of that savings to depositors as higher interest rates. They also compete aggressively for deposits since they can't rely on walk-in customers. A bank like Marcus, Ally, or American Express Personal Savings typically pays 4% to 5.25% APY, while a traditional bank with branches in your town might pay 0.01% to 0.50% APY on the same type of account.
Banks also adjust rates based on what the Federal Reserve does. When the Fed raises its benchmark rate, banks raise what they pay depositors—but they do it at different speeds. Some move within a week; others wait months. When the Fed cuts rates, banks drop their rates faster than they raised them, because they want to keep the spread between what they pay you and what they charge borrowers.
What happens when rates fall
If you lock in a 5.00% rate today and the Fed cuts rates in six months, your bank will lower your rate too. There's no penalty for this—it's how savings accounts work. You don't get to keep the old rate. The bank will notify you before the change, usually by email, and the new rate takes effect on a date they specify. You can move your money to another bank if the new rate is too low, but that takes a few business days and you'll earn nothing during the transfer.
This is why comparing rates matters most when you're about to deposit a large sum. If you're moving $50,000 from a checking account to savings, spending an hour finding the highest-paying account could earn you an extra $500 to $1,000 per year. If you're moving $2,000, the difference is smaller but still real—maybe $20 to $40 per year.
How to find the current highest rates
The rates change so often that any specific number printed here would be outdated within weeks. Instead, check sites that track rates in real time: Bankrate, DepositAccounts, and the Federal Deposit Insurance Corporation (FDIC) website all list current APYs from multiple banks. You can sort by rate and see which banks are paying the most right now. Read the fine print for any minimum balance requirements or restrictions on how often you can withdraw.
When you find a bank offering a rate you like, open the account online—it usually takes 10 to 15 minutes. You'll need your Social Security number, a government ID, and proof of address. The bank will verify your identity and fund the account from another bank account you own. Money typically arrives within one to three business days.
The difference between a high-yield savings account and other places to keep money
A high-yield savings account is different from a money market account, a certificate of deposit (CD), or a regular savings account. A money market account usually pays slightly less than a high-yield savings account but lets you write checks. A CD locks your money away for a set period—three months, one year, five years—and pays a fixed rate; if you withdraw early, you pay a penalty. A regular savings account at a traditional bank pays almost nothing but is convenient if you already bank there.
For money you might need within the next few years, a high-yield savings account is usually the best choice. For money you won't touch for five years or more, a CD might pay slightly more. For money you need to access constantly, a regular checking account makes sense even if it pays nothing.
Frequently Asked Questions
Can the bank lower my interest rate whenever it wants?
Yes. A savings account rate is not locked in. The bank can lower it at any time with notice, usually given by email. You can move your money to another bank if the rate drops too much, but there's no penalty for leaving.
Is my money safe in a high-yield savings account?
If the bank is FDIC-insured, your deposits up to $250,000 are protected by the federal government if the bank fails. Nearly all online banks and traditional banks are FDIC-insured. Check the bank's website or the FDIC's bank search tool to confirm.
How often does the interest get added to my account?
Most banks compound and credit interest daily or monthly. Daily compounding means you earn a tiny bit of interest every single day. Monthly means it's calculated and added once a month. The difference over a year is small but real.
What if I withdraw money before the year is over?
You earn interest only on the money that stays in the account. If you deposit $10,000 at 5.00% APY and withdraw $3,000 after six months, you earn interest only on the $7,000 for the second half of the year. There's no penalty for withdrawing.
Do I have to pay taxes on the interest I earn?
Yes. Interest from a savings account is taxable income. The bank will send you a 1099-INT form at the end of the year if you earned $10 or more in interest, and you'll report it on your tax return. This is one reason why the actual money you keep is less than the APY suggests.