What a savings account interest rate actually is

A savings account interest rate is the percentage of your balance that a bank pays you each year for letting them hold your money. If you keep $1,000 in a savings account with a 4.5% annual interest rate, the bank will pay you $45 over the course of a year — though the actual payment happens in smaller chunks, usually monthly or daily.

The bank pays you interest because they lend out the money you deposit to other customers. They charge those borrowers a higher rate than they pay you, and the difference is how the bank makes money. The rate you receive depends on what the bank decides to offer, how much money you have, and what the broader interest rate environment looks like — which is set by the Federal Reserve.

Interest rates on savings accounts change. A bank might offer 4.5% one month and 3.8% the next. Some accounts lock in a rate for a set period; most savings accounts let the bank change the rate whenever they want. This matters because your earnings can shift without you doing anything.

Key Takeaways

  • Banks pay you interest on savings account balances as a percentage of what you have on deposit, calculated and paid out regularly throughout the year.
  • The rate you earn depends on the bank's decision, the size of your balance, and Federal Reserve policy — not on how long you've been a customer.
  • Interest rates on most savings accounts can change at any time, so a rate offered today may be different next month.
  • Higher rates mean more money in your account over time, but the difference between a 4% rate and a 5% rate on $10,000 is about $100 per year.

How banks calculate and pay your interest

Banks use one of two methods to calculate interest: straightforward interest or compound interest. straightforward interest is straightforward — the bank takes your balance, multiplies it by the annual rate, and divides by 12 (or 365, depending on the method). Compound interest adds earned interest back into your balance, so you earn interest on your interest. Most savings accounts use daily compounding, which means the bank recalculates your interest every single day based on your current balance.

Here is what that looks like in practice. If you have $10,000 at a 4.8% annual rate with daily compounding, the bank divides 4.8% by 365 days to get a daily rate of about 0.0131%. Each day, they add that amount to your balance. By the end of the year, you will have earned roughly $492 instead of exactly $480, because you earned interest on the interest that was added earlier in the year.

The bank pays out the interest you have earned, usually once a month. Some banks pay weekly or daily; a few still pay quarterly. When interest posts to your account, it becomes part of your balance and starts earning interest itself the next day.

Why rates differ between banks and account types

Not all banks offer the same rate. A large national bank might offer 0.01% on a basic savings account, while an online-only bank offers 4.5% on the same type of account. The difference comes down to how much it costs the bank to operate. Online banks have lower overhead — no branches, fewer employees — so they can afford to pay depositors more and still make a profit.

Banks also offer different rates based on your balance. Some have tiered rates: you might earn 4.0% on the first $25,000 and 4.5% on anything above that. Others offer higher rates only if you maintain a minimum balance or set up automatic deposits. A few banks offer promotional rates for new customers — a higher rate for the first few months, then a drop to the standard rate.

Account type matters too. A money market account often pays more than a basic savings account. A certificate of deposit (CD) locks your money away for a set term — three months, one year, five years — and in exchange pays a higher rate than a savings account. The longer the term, the higher the rate usually is, because the bank knows it will have your money for longer.

How Federal Reserve policy affects what you earn

The Federal Reserve sets a target range for the federal funds rate — the rate at which banks lend to each other overnight. When the Fed raises this rate, banks have to pay more to borrow money, so they raise the rates they offer on savings accounts to attract deposits. When the Fed cuts rates, banks lower what they pay you.

This is why savings account rates have moved so much in recent years. From 2020 to 2022, the Fed raised rates aggressively, and savings rates climbed from near zero to 4% or higher. If the Fed cuts rates in the future, you should expect the rates banks offer to fall as well. This does not happen when ready — some banks move faster than others — but the direction is set by Fed policy.

You cannot control what the Fed does, but you can control which bank you use. When rates are high, it is worth moving your money to a bank offering a competitive rate. When rates fall, your rate will fall too, but you can shop around to find the bank that falls the slowest or offers the highest floor.

The difference between APY and the stated rate

APY stands for Annual Percentage Yield. It is the rate you will actually earn over a year, including the effect of compounding. The stated rate (also called the APR or nominal rate) is the base percentage before compounding is factored in.

For savings accounts, the difference is usually small but real. A bank might advertise a 4.80% stated rate, but the APY is 4.92% because of daily compounding. On $10,000, that extra 0.12% means about $12 more per year. On larger balances, the difference grows. Banks are required to show you the APY, not just the stated rate, so you can compare accounts fairly.

When you are shopping for a savings account, always compare APY numbers, not stated rates. The APY tells you what you will actually earn.

What happens to your interest if you withdraw money

If you withdraw money from your savings account, you stop earning interest on that amount when ready. The interest you have already earned stays in your account. If you withdraw $5,000 from a $10,000 balance, you keep the interest that was paid on the full $10,000 up to that point, but going forward you only earn interest on the remaining $5,000.

Some savings accounts have withdrawal limits or penalties if you withdraw too often. Federal rules used to cap savings account withdrawals at six per month, but that rule was suspended in 2020 and has not been reinstated. Individual banks may still impose their own limits, so check your account terms. If you withdraw more than the limit, the bank might charge a fee or convert your account to a checking account.

High-yield savings accounts typically have no withdrawal limits and no penalties. You can move money in and out as often as you want. The tradeoff is that the rate can change at any time, and you earn nothing on money that is not in the account.

Comparing rates across banks and deciding where to keep your money

To find the best rate, you need to look at what different banks are currently offering. Websites like Bankrate, DepositAccounts, and the FDIC's BankFind tool let you search by account type and see rates from multiple banks. Rates change frequently, so a rate you see today may be different by next week.

When comparing, look at the APY, not the stated rate. Check whether there are minimum balance requirements or other conditions attached to the rate. Read the fine print about whether the rate is promotional (temporary) or standard. A bank offering 5.0% for three months then dropping to 2.0% is not as good as a bank offering 4.5% indefinitely.

Consider how you plan to use the account. If you need to access your money frequently, a high-yield savings account with no withdrawal limits makes sense. If you know you will not touch the money for a year or more, a CD might pay more. If you have a very large balance, ask whether the bank offers tiered rates that reward you for keeping more money there.

Frequently Asked Questions

Does the interest rate on my savings account stay the same forever?

No. Most savings accounts have variable rates that the bank can change at any time. A CD locks in a rate for a set period — if you open a one-year CD at 4.5%, you will earn 4.5% for the full year no matter what happens to other rates. Savings accounts offer no such may provide.

How often do banks pay interest?

Most banks pay interest monthly, though some pay weekly or daily. The frequency does not change how much you earn over a year — a 4.8% APY is 4.8% whether it is paid monthly or daily. Daily compounding means you earn slightly more than monthly compounding, but the difference is small.

If I move my money to a different bank, do I lose the interest I already earned?

No. The interest you have already earned is part of your balance. When you transfer money to a new bank, you transfer the full amount including all interest. You only stop earning interest at the old bank once the money leaves that account.

What is the difference between a savings account and a money market account?

A money market account usually pays a higher rate than a savings account, but may require a larger minimum balance and limit how often you can withdraw. Some money market accounts come with a debit card or checks, which savings accounts typically do not. The FDIC insurance limits are the same for both.

Can I earn interest on a checking account?

Some checking accounts pay interest, but the rate is almost always much lower than a savings account — often 0.01% or less. If you want to earn meaningful interest, keep your everyday spending money in checking and move extra funds to a savings account or money market account.