Interest posts to your account on a schedule set by your bank, not continuously
Interest in a savings account does not accumulate every day in a way you can see or use. Instead, your bank calculates what you owe and deposits it into your account on a fixed schedule — usually monthly, quarterly, or annually. The frequency depends entirely on the bank's terms, which you can find in the account disclosure document they give you when you open the account.
Most banks post interest monthly. Some post quarterly (four times a year). A few post annually (once a year). The schedule is set when the account is created and does not change unless the bank changes its terms and notifies you in writing. You will see the deposit appear as a single transaction on your statement on the posting date.
The amount you receive depends on two things: the interest rate the bank is currently paying (which can change) and how much money was in the account during the period being calculated. If your balance changes during the month, the bank uses an average or the lowest balance, depending on their method — check your disclosure to know which one applies to you.
Key Takeaways
- Interest posts on a schedule your bank sets — usually monthly, sometimes quarterly or annually — and appears as a single deposit on your statement.
- The amount you receive each posting period depends on the current interest rate and your account balance during that period.
- Interest rates can change at any time, and banks must notify you before lowering the rate on an existing account.
- You can find the exact posting schedule and calculation method in your account's disclosure document or by asking your bank directly.
- Daily compounding (where interest earns interest) still results in a single visible deposit on your posting date, even though the calculation happens daily behind the scenes.
Why the posting schedule matters to your balance
The posting date is when the interest actually becomes yours and available to withdraw. Until that date, the interest has been calculated but not yet added to your account. If you close the account before the posting date, you will not receive the interest that was earned during that period — it stays with the bank.
This is why timing matters if you are moving money between accounts or closing a savings account. If you know interest posts on the 15th of each month, closing the account on the 14th means you lose that month's interest. Waiting until after the 15th ensures you receive it.
The posting schedule also affects how much interest you earn over time if you are comparing accounts. An account that posts monthly will show you the results of your savings more frequently than one that posts annually, but the total amount earned over a year is the same if the interest rate is identical.
How banks calculate the amount before posting
Banks use one of two methods to calculate interest: the average daily balance method or the lowest balance method. The disclosure document you received when you opened the account will state which one your bank uses.
With the average daily balance method, the bank adds up your balance at the end of each day during the period, divides by the number of days, and applies the interest rate to that average. This method rewards you for keeping money in the account longer during the month.
With the lowest balance method, the bank uses the smallest balance your account held at any point during the period. This method is less common and less favorable to you, because a single large withdrawal early in the month can reduce the interest you earn for the entire period. If your bank uses this method, you may want to reconsider where you keep your savings.
Once the amount is calculated, it sits in the bank's system until the posting date, when it is transferred into your account as a deposit. You can see the exact amount on your statement on that date.
What happens if the interest rate changes
Banks can change interest rates at any time, but they must notify you before lowering the rate on an existing account. The notification usually comes by mail or email and includes the new rate and the date it takes effect. The new rate applies to interest posted on or after that date.
If you have money in the account when the rate drops, the interest posted on your next posting date after the change will reflect the lower rate. There is no grace period or way to lock in the old rate on existing balances — the new rate applies when ready after the effective date.
Rate increases do not require advance notice, so you may not know your rate went up until you see a larger deposit on your statement. This is rare in the current environment, but it can happen if the Federal Reserve raises rates and banks respond by raising savings rates to attract deposits.
Daily compounding versus posting frequency
Some banks advertise "daily compounding" on savings accounts. This means the bank calculates interest on your balance every single day, and then calculates interest on that interest the next day. However, you still only see one deposit on your statement — on the posting date.
Daily compounding does result in slightly more interest over time than monthly or quarterly compounding, because you earn interest on your interest more often. But the difference is small unless you have a large balance. A $10,000 balance earning 4.5% annually will earn roughly $450 per year whether the bank compounds daily or monthly — the difference is a few dollars.
The posting frequency (how often you see the deposit) is separate from the compounding frequency (how often interest is calculated). A bank might compound daily but post monthly. You will not see the daily compounding happen — you will only see the final result when it posts.
How to find your account's posting schedule
The posting schedule is listed in your account disclosure, which is a document the bank gave you when you opened the account. It is usually called the "Truth in Savings Disclosure" or "Account Terms and Conditions." If you do not have a copy, you can request one from your bank by phone, email, or in person.
You can also call your bank's customer service line and ask directly: "When does interest post to my account?" They will tell you the exact date or dates each month, quarter, or year. Write it down so you know when to expect the deposit.
If you are comparing savings accounts at different banks, ask each bank about their posting schedule before you open an account. Some people prefer monthly posting because they see the results of their savings more frequently, while others do not care as long as the interest rate is competitive.
What to do if interest does not post on the expected date
If you expected interest to post and it did not appear on your statement, first check the disclosure document to confirm the posting date. Banks sometimes post on different dates depending on weekends or holidays — if the posting date falls on a weekend, the bank may post on the following Monday.
If the date has passed and the interest still has not appeared, contact your bank. Errors are rare, but they happen. The bank can tell you whether the interest was calculated and is pending, or whether there was a problem. If there was an error, the bank is responsible for posting the correct amount plus any interest you lost by not having the money in your account.
Keep your statements for at least one year so you can verify that interest posted each time it was supposed to. If you notice a pattern of missing interest deposits, that is a sign to switch to a different bank or account type.
Frequently Asked Questions
Can I withdraw my interest before the posting date?
No. Interest does not exist in your account until it posts on the scheduled date. Before that date, it is a calculation the bank has made but not yet transferred to you. You can only withdraw interest after it has been deposited into your account.
Do I pay taxes on interest the moment it posts, or when I earn it?
The IRS considers interest income taxable in the year it is posted to your account, not the year it was earned. If interest posts in December, you report it on that year's tax return, even if you do not withdraw it. Your bank will send you a 1099-INT form in January showing all interest posted during the previous year.
What if I close my account right before interest posts?
You will not receive the interest that was earned but not yet posted. Once you close the account, the bank keeps any unpaid interest. To avoid this, close your account after the posting date, not before.
Does a higher interest rate mean interest posts more often?
No. The posting frequency and the interest rate are separate things. A 5% account that posts monthly earns the same amount per year as a 5% account that posts quarterly — the only difference is how often you see the deposit. The rate determines how much you earn; the posting schedule determines when you see it.
Can my bank change when interest posts?
Yes, but they must notify you in advance. If your bank changes the posting schedule, they will send you written notice with the new schedule and the date it takes effect. You can request a copy of the updated disclosure document to confirm the change.