What a high yield savings account makes depends on the balance, the rate, and how long you keep the money there

A high yield savings account earns money through interest—a percentage of your balance that the bank pays you each month or year. The amount you earn is the product of three things: how much money sits in the account, what annual percentage yield (APY) the bank offers, and how long your money stays deposited.

If you have $10,000 in an account paying 4.50% APY, you earn roughly $450 per year, or about $37.50 per month. If the same account pays 2.00% APY, you earn $200 per year. The difference between a high yield account and a traditional savings account—which often pays 0.01% or less—can be hundreds of dollars per year on the same balance.

The catch: rates change. Banks raise and lower their APY based on what the Federal Reserve does with interest rates. An account paying 5.00% today might pay 3.50% in six months. Your earnings depend on the rate at the time your money is actually in the account, not the rate when you opened it.

Key Takeaways

  • Your earnings equal your balance multiplied by the APY, divided by 12 for a monthly figure—a $25,000 balance at 4.50% APY earns about $93.75 per month.
  • High yield savings accounts currently pay between 4.00% and 5.35% APY depending on the bank, compared to 0.01% or less at most traditional banks.
  • Interest compounds monthly or daily depending on the bank, meaning you earn interest on your interest, though the effect is small on most balances.
  • Your earnings are taxed as ordinary income, so you will owe federal income tax on the interest at your marginal tax rate.
  • Rates fall when the Federal Reserve cuts rates and rise when it raises them, so your earnings will change over time even if your balance stays the same.

How to calculate what you will earn

The basic formula is: Balance × APY ÷ 12 = Monthly earnings. If you have $50,000 at 4.75% APY, you earn $198.96 per month. Over a year, that is $2,387.50.

Most banks compound interest daily or monthly, which means you earn a tiny amount of interest on the interest you already earned. On a $50,000 balance, daily compounding adds roughly $10 to $15 per year compared to simple interest. On smaller balances—$5,000 or less—the difference is negligible.

To compare accounts, use the APY figure, not the interest rate. APY already includes the effect of compounding, so it is the true number to use when deciding between banks.

Current rates and how they compare

As of early 2024, high yield savings accounts at online banks pay between 4.00% and 5.35% APY. The highest rates tend to come from smaller online banks like Marcus, Ally, and American Express Personal Savings. Rates vary week to week as banks adjust to market conditions.

A traditional savings account at a brick-and-mortar bank typically pays 0.01% to 0.05% APY. On a $10,000 balance, that earns $1 to $5 per year. The same $10,000 in a 4.50% high yield account earns $450 per year—a difference of $445.

Money market accounts sometimes pay rates close to high yield savings accounts, but they often require higher minimum balances and limit how many times per month you can withdraw. Certificates of deposit (CDs) may pay slightly higher rates, but your money is locked up for a set term—usually three months to five years—and you pay a penalty if you withdraw early.

How taxes reduce your actual earnings

Interest from a savings account is taxed as ordinary income. If you earn $450 in interest and your federal tax bracket is 22%, you owe $99 in federal tax on that interest. Your state may tax it too.

This means your real earnings are lower than the APY suggests. A 4.50% APY account earning $450 per year might net you only $350 after taxes, depending on your tax bracket. The higher your income, the larger the tax bite.

The bank will send you a 1099-INT form in January showing how much interest you earned during the previous year. You report this on your tax return. There is no way to avoid the tax, but it is worth calculating the after-tax return when comparing accounts.

Why rates change and what that means for your earnings

High yield savings rates move in lockstep with the federal funds rate, which the Federal Reserve sets. When the Fed raises rates, banks raise what they pay on savings accounts. When the Fed cuts rates, banks cut their rates too—sometimes within days.

From 2022 to 2023, the Fed raised rates aggressively, and high yield savings accounts climbed from around 0.50% to over 5.00%. If you locked money into a CD in 2021 at 0.50%, you missed out on years of higher earnings. If you moved money to a high yield account in 2023, you benefited from the higher rates.

No one knows when rates will fall, but history suggests they eventually do. If you are counting on $450 per year in interest income, plan for that number to shrink if rates drop. A 4.50% account could become a 2.50% account within a year or two.

How balance size affects your total earnings

The larger your balance, the more you earn in absolute dollars. A $5,000 balance at 4.50% APY earns $225 per year. A $50,000 balance earns $2,250. A $100,000 balance earns $4,500.

This is why high yield savings accounts make the most sense for people with substantial emergency funds or short-term savings goals. If you have $1,000 in savings, a high yield account earning $45 per year is better than a traditional account earning $0.10, but the difference is small in dollar terms. If you have $100,000, the difference is $4,455 per year—money worth chasing.

Most high yield savings accounts have no minimum balance requirement, though some require $1,000 or $2,500 to open. A few pay slightly higher rates if you maintain a larger balance, but the difference is usually less than 0.25% APY.

When a high yield savings account makes sense versus other options

A high yield savings account is best for money you need to keep liquid—accessible without penalty—and that you do not plan to invest. If you have an emergency fund, money for a down payment you plan to make in two years, or a bonus you are saving, a high yield account beats a traditional savings account by hundreds of dollars per year.

A CD pays slightly more than a high yield savings account, but only if you can lock your money away for the full term. If you might need the money before the CD matures, the early withdrawal penalty often wipes out the extra interest. A CD makes sense if you know you will not touch the money for a specific period—say, 12 months—and you want to lock in a rate.

If you are investing for retirement or long-term growth, the stock market historically returns more than savings accounts, but with more risk. A high yield savings account is not an investment; it is a place to park money safely while earning more than nothing.

Frequently Asked Questions

How often does interest get added to my account?

Most banks compound and deposit interest monthly, though some do it daily. Monthly compounding is standard. The difference in earnings between daily and monthly compounding is small—usually less than $10 per year on balances under $100,000.

Do I have to pay taxes on the interest I earn?

Yes. Interest from a savings account is taxed as ordinary income at your federal tax rate and usually your state rate too. The bank reports it to the IRS on a 1099-INT form, and you report it on your tax return.

What happens to my earnings if the bank lowers its rate?

Your earnings drop immediately. If your account paid 5.00% and the bank cuts it to 3.50%, your monthly earnings fall by 30% starting the next month. You can move your money to a different bank offering a higher rate, but you will owe taxes on any interest earned before you move it.

Can I earn more by putting money in multiple high yield accounts?

No. The rate you earn depends on the bank's APY, not how many accounts you have. Spreading $50,000 across five accounts at 4.50% APY earns the same $2,387.50 per year as keeping it all in one account. The only reason to use multiple accounts is to stay under the FDIC insurance limit of $250,000 per bank.

Is a high yield savings account safer than keeping money in a regular bank?

Yes and no. Most high yield savings accounts are at FDIC-insured banks, so your deposits are protected up to $250,000 per bank, the same as traditional accounts. The difference is the rate, not the safety. Check that the bank is FDIC-insured before opening an account.