Interest accrues daily but posts on a schedule that depends on your bank
Most banks calculate interest on your savings account balance every single day. That daily calculation is called accrual. But the money doesn't hit your account on a daily basis. Instead, banks add up all those daily accruals and deposit the total into your account on a set schedule — usually monthly, quarterly, or annually. The schedule varies by bank and by account type, so you need to check your specific account agreement to know when you'll actually see the interest appear.
The timing matters because it affects when you can use that interest. Money that has accrued but not yet posted is not available to withdraw. Once it posts, it becomes part of your balance and earns interest itself — a process called compounding. The more frequently interest posts, the more you earn overall, because each deposit starts earning interest right away.
Key Takeaways
- Interest accrues (is calculated) daily on nearly all savings accounts, but the actual deposit into your account happens on a monthly, quarterly, or annual schedule set by your bank.
- You cannot withdraw accrued interest until it posts to your account, even though the bank has already calculated it.
- More frequent posting schedules mean higher total earnings because interest begins earning interest sooner after each deposit.
- Your account agreement or the bank's disclosure statement will tell you the exact posting schedule for your account.
How daily accrual works in practice
When a bank accrues interest daily, it takes your account balance at the end of each day, applies the annual interest rate divided by 365 (or sometimes 360), and adds that amount to a running total. This happens whether your balance goes up or down. If you deposit $5,000 on a Tuesday, interest starts accruing on that $5,000 the next day. If you withdraw $2,000 on a Thursday, the accrual calculation drops to reflect the lower balance on Friday.
The bank keeps a separate record of accrued interest — money it has calculated but not yet moved into your account. You can usually see this on your statement as a line item, sometimes labeled "interest earned" or "accrued interest." It sits there until the posting date arrives. On that date, the bank moves the entire accrued amount into your account balance, and the accrual counter resets to zero.
Posting schedules vary by bank and account type
Monthly posting is the most common schedule. Banks that post monthly usually do so on the last day of the month or the first day of the next month. Some accounts post quarterly — on the last day of March, June, September, and December. A few accounts, particularly money market accounts or promotional savings products, post annually on a set date.
The posting schedule is not negotiable. You cannot ask your bank to post interest weekly instead of monthly. However, you can compare posting schedules when choosing between banks. If two banks offer the same interest rate but one posts monthly and the other posts quarterly, the monthly posting account will earn slightly more over a year because the interest compounds more often.
Your account agreement or the bank's disclosure statement (sometimes called a "Truth in Savings" document) will state the exact posting schedule. If you cannot find it online, call the bank's customer service line and ask directly. They can tell you the posting date for your specific account type.
Why posting frequency affects your total earnings
The difference between monthly and quarterly posting is small but real. Suppose you have $10,000 in an account earning 4.5% annual interest. With monthly posting, the bank accrues roughly $37.50 each month. After the first month, that $37.50 posts and becomes part of your balance. In month two, you earn interest on $10,037.50 instead of $10,000. By the end of a year, monthly compounding produces about $461 in total interest.
With quarterly posting, all three months of accrual happen before any interest posts. You earn interest on the original $10,000 for the full quarter, then the accrual posts all at once. Over a year, quarterly posting produces roughly $459 in total interest — about $2 less. The gap widens with larger balances and higher rates, but the principle stays the same: more frequent posting means more compounding, which means more money.
This is why high-yield savings accounts, which often post monthly, tend to outpace regular savings accounts with quarterly posting, even when the stated interest rate is identical. The posting schedule is part of what you're actually earning.
What happens if you close your account before interest posts
If you close your account before the posting date, you lose the accrued interest that has not yet posted. The bank will not pay you interest that has been calculated but not deposited. This is an important detail if you are planning to move money to a different bank or account. Check when the next posting date is before you close the account. If it is coming up soon, you might wait a few days to capture that interest.
Some banks will honor accrued interest if you close the account on or after the posting date, even if you close it the same day. Others have a different policy. Ask your bank directly: "If I close this account on [date], will I receive the accrued interest that posts on [posting date]?" Get a clear answer in writing if possible.
How interest rates and accrual frequency interact
A bank might advertise a 4.5% annual percentage yield (APY) on a savings account. The APY already accounts for the effect of compounding at that bank's posting frequency. So a 4.5% APY with monthly posting is mathematically equivalent to a slightly lower annual percentage rate (APR) compounded monthly. You do not need to do the math yourself — the APY is the number that matters for comparison.
When you compare two accounts, use the APY, not the APR. The APY tells you what you will actually earn in a year, assuming you leave the money untouched. The posting frequency is already baked into that number. If one bank shows a 4.5% APY and another shows 4.48% APY, the difference reflects their different posting schedules, account features, or both.
Frequently Asked Questions
Can I withdraw accrued interest before it posts?
No. Accrued interest is not available to withdraw until it posts to your account. Once it posts, it becomes part of your balance and you can withdraw it like any other money. If you need access to interest before the posting date, you would have to close the account and accept that you lose the unposted accrual.
What if my bank changes its interest rate mid-month?
The new rate applies to accrual going forward. If your rate drops on the 15th of the month, the first 14 days accrue at the old rate and the remaining days accrue at the new rate. The bank calculates both portions and adds them together when interest posts. Your statement will show the total accrued for the period.
Does accrual stop if my account balance drops to zero?
Yes. Interest only accrues on the balance you actually have. If your balance is zero, no interest accrues. Once you deposit money again, accrual resumes the next day. If you withdraw everything before the posting date, you lose the accrued interest on that money.
Why do some banks post interest on different dates than others?
Banks choose their posting schedules based on their accounting systems and operational preferences. There is no regulatory requirement for a specific posting frequency. Monthly posting is most common because it aligns with monthly statements, but banks are free to post quarterly or annually if they choose.
If I move money between my own accounts, does it affect accrual?
Moving money between accounts you own at the same bank does not reset accrual. The interest calculation continues on the balance in each account. If you move money to a different bank, accrual stops at the first bank and begins at the second bank the next day.