How much a high yield savings account earns depends on the rate the bank sets and how often interest compounds

A high yield savings account (HYSA) earns interest on your balance, but the amount you make is not fixed. Banks set their own rates, which means the same account at one bank might earn 4.50% annual percentage yield (APY) while another bank offers 5.35% APY. The difference matters: on $10,000, the gap between 4.50% and 5.35% is about $85 per year.

Your actual earnings depend on three things: the APY the bank advertises, how long you leave the money in the account, and whether the bank compounds interest daily or monthly. Most online banks compound daily, which means you earn a tiny amount of interest on yesterday's interest. This compounds over time, but the effect is small on most balances.

Rates change frequently. Banks raise and lower their APY based on what the Federal Reserve does with its benchmark interest rate. When the Fed raises rates, banks typically raise HYSA rates within days or weeks. When the Fed cuts rates, banks often cut HYSA rates just as quickly. This means the rate you see today may not be the rate you earn six months from now.

Key Takeaways

  • Different banks offer different APY rates on the same type of account, so comparing rates across banks can add hundreds of dollars to your annual earnings.
  • The APY you see advertised is the annual rate, but interest usually compounds daily, so you earn small amounts throughout the year.
  • HYSA rates move up and down with Federal Reserve policy changes, so the rate you lock in today will likely change within months.
  • Your total earnings are calculated by multiplying your balance by the APY and dividing by 365 days, then compounding that daily.
  • Rates vary by bank and change frequently, so checking current rates at multiple banks before opening an account can make a real difference in what you earn.

How to calculate what you'll earn

The math is straightforward if you leave your money untouched for a full year. Take your balance, multiply it by the APY, and that is your annual earnings. A $25,000 balance at 5.00% APY earns $1,250 per year. At 4.50% APY, the same balance earns $1,125 — a difference of $125.

If you add or withdraw money during the year, your earnings change. Banks calculate interest daily based on your balance that day. If you deposit $5,000 on July 1st, that $5,000 only earns interest from July 1st onward, not for the full year. Most banks show you a running total of interest earned in your account dashboard, so you can see exactly what you have made so far.

The daily compounding effect is real but small for most people. On a $10,000 balance at 5.00% APY compounded daily, you earn about $512.68 over a year instead of exactly $500. The extra $12.68 comes from earning interest on the interest. On larger balances or over many years, compounding adds up more noticeably.

Why rates differ between banks

Online banks typically offer higher APY rates than brick-and-mortar banks because they have lower overhead costs. They do not pay for physical branches, tellers, or as many staff members. That savings gets passed to customers as higher interest rates. A large national bank might offer 0.01% APY on a regular savings account, while an online bank offers 5.00% or more on an HYSA.

Banks also compete for deposits. When one online bank raises its rate to 5.35%, competitors often follow within days to stay competitive. This competition is why HYSA rates at online banks tend to move together and stay relatively close to each other. Banks that fall too far behind lose customers to competitors offering better rates.

The bank's size and business model also matter. Some banks use deposits to fund mortgages and loans, so they can afford to pay higher interest on savings. Others may be newer and trying to grow their customer base quickly, so they offer premium rates to attract deposits. A few banks offer promotional rates for new customers that are higher than their standard rate, though these usually drop after three or six months.

How Federal Reserve rate changes affect your earnings

The Federal Reserve sets a target range for the federal funds rate, which is the interest rate banks charge each other for overnight loans. When the Fed raises this rate, banks have more incentive to raise the rates they pay on savings accounts, because they can earn more by lending money out. When the Fed cuts rates, banks cut HYSA rates because they earn less from lending.

The relationship is not one-to-one. If the Fed raises rates by 0.25%, banks do not always raise HYSA rates by exactly 0.25%. Some banks move quickly and match the Fed's move closely. Others move slowly or by smaller amounts. Over time, though, HYSA rates track the Fed's direction fairly closely.

This means your HYSA earnings can change significantly over a year or two if the Fed is actively raising or cutting rates. If you opened an account at 5.35% APY and the Fed cuts rates by 1.00% over the next year, your rate might drop to 4.35% or lower. Conversely, if the Fed raises rates, your earnings can increase.

Comparing rates across banks before you open an account

The best time to compare HYSA rates is right before you open an account. Websites that track savings rates, like Bankrate, DepositAccounts, and DepositRates, update rates multiple times per day and let you sort by APY. You can see which banks are currently offering the highest rates and which ones have the most stable rate histories.

When comparing, look at the APY, not just the interest rate. APY includes the effect of compounding, so it is the true annual return. Also check whether the rate is a promotional rate that will drop after a set period, or a standard rate that the bank plans to maintain. Read the account terms to see if there are any restrictions, like a minimum balance requirement or a limit on how many withdrawals you can make per month.

Do not chase the absolute highest rate if it is only 0.10% or 0.15% higher than other banks. The difference on a $10,000 balance is only $10 to $15 per year. If the bank with the highest rate has a clunky app or poor customer service, the extra earnings may not be worth the hassle. Pick a bank with a competitive rate, solid reviews, and features that work for you.

What happens to your earnings if you withdraw money early

Unlike certificates of deposit (CDs), HYSAs have no penalty for withdrawing money early. You can take out your balance and all the interest you have earned at any time without losing any of your earnings. This is one of the main advantages of an HYSA over a CD.

However, withdrawals do affect your future earnings. If you withdraw $5,000 from a $25,000 balance, your new balance is $20,000, and from that point forward you only earn interest on $20,000. The interest you already earned stays with you, but your daily interest earnings drop when ready.

Some banks also limit how many withdrawals you can make per month without a fee, though this is less common than it used to be. Check your account terms to see if there are any withdrawal limits or fees. Most online banks allow unlimited withdrawals with no penalty.

How HYSA earnings compare to other savings options

A high yield savings account typically earns more than a regular savings account at the same bank, but less than a CD with the same term. A regular savings account might earn 0.01% to 0.50% APY, while an HYSA earns 4.50% to 5.35% APY. A one-year CD might earn 5.00% to 5.50% APY, slightly higher than an HYSA, but you cannot touch the money without a penalty.

Money market accounts are similar to HYSAs and often offer comparable rates. The main difference is that money market accounts may come with a debit card and checkbook, while HYSAs typically do not. Both are FDIC insured up to $250,000 and both offer better rates than regular savings accounts.

If you need the money to be accessible without penalty, an HYSA is usually the best choice. If you know you will not need the money for a specific period, like one year or two years, a CD might earn you slightly more. The difference is usually small — often less than 0.50% APY — so the choice depends on whether you value flexibility or maximum earnings.

Frequently Asked Questions

Do I have to keep a minimum balance to earn the advertised APY?

Most online banks do not require a minimum balance to earn their advertised APY. However, some banks offer tiered rates where you earn more APY if you maintain a higher balance. Always check the account terms before opening. A few banks also require a minimum opening deposit, though this is usually just $1 to $25.

How often is interest added to my account?

Interest is calculated daily at most online banks, but it is usually deposited into your account monthly. This means you see your interest earnings appear in your balance once per month, even though the bank is calculating it every single day. Some banks deposit interest quarterly instead of monthly.

Can the bank lower my rate without warning?

Banks can change HYSA rates at any time without notice, though most send an email or notification when they do. You are not locked into a rate like you are with a CD. If your bank lowers the rate and you do not like the new rate, you can move your money to a different bank offering a higher rate.

What if I earn more than $10 in interest — do I owe taxes on it?

Yes, all interest earnings are taxable income. If you earn $50 or more in interest during a calendar year, the bank will send you a 1099-INT form in January that you use to report the earnings on your tax return. Keep track of your interest earnings throughout the year so you are not surprised at tax time.

Is my money safe if the bank fails?

Yes, as long as the bank is FDIC insured. The FDIC protects up to $250,000 per depositor per bank. Your HYSA balance and all interest earned are covered by this protection. Check the bank's website to confirm it is FDIC insured before you open an account.