Interest posts to your account on a schedule set by your bank, not continuously

Your savings account earns interest every day based on your balance, but the bank does not add that interest to your account every day. Instead, banks compound and post interest on a schedule — usually daily, monthly, or quarterly. Compounding means the bank calculates interest on your balance plus any interest already earned. Posting means the bank actually credits that money to your account where you can see it and use it.

The difference matters because you only earn interest on money the bank has actually posted. If your bank compounds daily but posts monthly, you earn interest on interest for 30 days before you see any of it in your balance. If it compounds and posts quarterly, you wait three months. The schedule is set by your bank's terms, not by you, and it varies widely between institutions.

Key Takeaways

  • Interest is calculated daily based on your balance, but posted (added to your account) on a schedule your bank sets — usually monthly or quarterly.
  • You can find your bank's posting schedule in the account disclosure document they gave you when you opened the account, or by calling customer service.
  • The Annual Percentage Yield (APY) printed on savings accounts already accounts for compounding, so you do not need to calculate it yourself.
  • Interest posts the same way whether you have $100 or $100,000 in the account — the schedule does not change based on balance.
  • If you close your account before interest posts, you lose the interest earned but not yet credited.

Where to find your bank's posting schedule

Your bank's posting schedule is in the Deposit Account Agreement or Truth in Savings disclosure — the document you received when you opened the account, usually as a PDF or paper form. Look for language like "interest is compounded daily and posted monthly" or "interest accrues daily and is credited quarterly." If you cannot find the document, call your bank's customer service line and ask directly: "How often does interest post to my savings account?"

Some banks post interest on the last day of the month. Others post on the 15th and the last day. A few post quarterly on the last day of March, June, September, and December. Online banks and credit unions sometimes post more frequently than traditional banks — some post daily or weekly. The schedule is part of what makes one savings account different from another, so it is worth knowing before you move money around.

How compounding frequency affects your earnings

The more often interest is compounded, the more you earn, because you earn interest on interest. If you have $10,000 earning 4.50% APY, the difference between daily compounding and quarterly compounding is small in the first month — maybe $1 or $2 — but it adds up over a year. The Annual Percentage Yield (APY) your bank advertises already includes the effect of compounding, so you do not have to do the math yourself. The APY is what you will actually earn if you leave the money untouched for a full year.

Compounding frequency matters most when you have a large balance or a high interest rate. With a small balance or a low rate, the difference between daily and monthly compounding might be a few cents per year. But if you are comparing two savings accounts with different rates and different compounding schedules, the APY tells you which one will actually earn you more money. That is the number to compare, not the interest rate alone.

What happens to interest if you withdraw money before it posts

If you withdraw money from your savings account before interest posts, you lose the interest that has accrued but not yet been credited. For example, if your bank posts interest on the last day of the month and you withdraw your entire balance on the 28th, you forfeit the interest earned for those 28 days. The bank will not pay you interest on money that is no longer in the account.

This is one reason to keep your savings separate from your checking account — you are less likely to dip into it before the interest posts. If you know your posting date, you can time large withdrawals for the day after interest posts, so you capture the full month's earnings before you move the money.

Interest posting and account closures

If you close your savings account, any interest that has accrued but not yet posted is forfeited. Some banks will pay it out if you ask, but they are not required to. If you are planning to close an account, check when interest posts next and wait until after that date to close it. The interest is usually small, but it is money you earned and should not leave on the table.

When you close an account, the bank sends you a final statement showing all activity through the closure date. If interest was posted before you closed it, that amount will appear on the statement. If interest had not yet posted, it will not appear, and you will not receive it unless you contact the bank and ask them to calculate and pay it out separately.

How interest rates and posting schedules work together

A high interest rate with infrequent posting can earn less than a lower rate with frequent posting, depending on your balance and how long you keep the money in the account. A 5.00% APY posted quarterly might earn you less over six months than a 4.75% APY posted daily, because the daily posting lets you earn interest on interest more often. However, the APY already accounts for this — it is the rate you will earn over a full year with compounding included.

If you are comparing savings accounts, the APY is the single number that matters most. It tells you what you will actually earn, regardless of how often the bank compounds or posts. Interest rates change frequently at most banks, so the rate you see today may not be the rate you earn next month. Check your bank's website or call before you move money, because rates can shift week to week.

Frequently Asked Questions

Does my interest earn interest?

Yes, if your bank compounds interest. When interest posts to your account, it becomes part of your balance, and the next interest calculation includes it. This is called compounding. The APY your bank advertises already includes the effect of compounding, so the number you see is what you will actually earn.

What if my bank does not tell me when interest posts?

Call customer service and ask directly. They can tell you the exact date or dates when interest posts each month or quarter. If they cannot answer, ask for the Deposit Account Agreement or Truth in Savings disclosure — it will have the schedule in writing.

Can I move money between accounts to earn more interest?

Moving money does not change how often interest posts or how much you earn. Interest is calculated on your balance on the posting date. If you move money out before interest posts, you lose the interest on that amount. If you move money in, you start earning interest on it the next day, but you will not see that interest until the next posting date.

Do I have to do anything to receive the interest that posts?

No. Interest posts automatically on the schedule your bank sets. You do not need to take any action. The money appears in your account on the posting date, and you can use it like any other balance in the account.

What if the interest rate changes between now and when interest posts?

The interest posted to your account is based on the rate that was in effect during the period it was earned. If your bank lowers the rate mid-month, the interest posted at month-end reflects the blended rate for the days at the old rate and the days at the new rate. You will see the new rate applied starting with the next posting period.