Interest posts to your account monthly, daily, or quarterly depending on your bank — but compounds daily at most institutions
Most banks compound interest daily, meaning they calculate what you owe every single day, but they post the payment to your account once a month. Some post quarterly (four times a year) or even annually. The compounding frequency matters more than the posting frequency because daily compounding means your interest earns interest faster, even if you don't see the money hit your account until the end of the month.
Your account agreement or the bank's website will state both frequencies. Look for language like "compounded daily, posted monthly" or "compounded and posted quarterly." The difference between daily and monthly posting is usually small — a few cents on a typical balance — but it adds up over years.
Key Takeaways
- Most banks compound interest daily but post it monthly, so your money grows every day even though you see the deposit once a month.
- The compounding frequency (how often interest is calculated) matters more than the posting frequency (how often it appears in your account).
- Online banks typically post interest monthly; some credit unions and specialty accounts post quarterly or annually.
- Your account agreement or the bank's disclosure statement will specify both frequencies — check before opening an account if posting frequency matters to you.
- Moving money between accounts or closing an account mid-month may affect when interest posts, so timing withdrawals matters if you are close to a posting date.
Why compounding frequency matters more than posting frequency
Compounding is the engine. When a bank compounds daily, it calculates interest on your balance every day and adds that interest to the principal for the next day's calculation. That means your interest starts earning interest immediately. If a bank compounds monthly instead, your interest sits idle for 30 days before it joins the principal.
Over one year on a $10,000 balance at 4.5% APY, daily compounding and monthly posting will give you nearly the same result as daily compounding and daily posting. The difference is usually under $1. But if you leave the money untouched for five years, daily compounding pulls ahead noticeably because the compounded interest has more time to compound again.
When you compare savings accounts, look at the APY (annual percentage yield), not the interest rate. APY already factors in how often the bank compounds, so a 4.5% APY account will earn the same amount whether interest posts monthly or quarterly.
Monthly posting is the standard for online and traditional banks
Most online banks and large traditional banks post interest on the last day of the month or the first day of the next month. This is the industry standard because it aligns with monthly statements and makes accounting simpler for the bank.
Some banks post on specific dates — the 15th and the last day, for example — if they run multiple posting cycles. A few credit unions and specialty savings products post quarterly (March 31, June 30, September 30, December 31) or annually (December 31 only). These less frequent posting schedules are rare and usually appear in older accounts or niche products.
If you are moving money between accounts or closing an account, check when the next posting date is. If you withdraw money the day before interest posts, you may miss that month's interest entirely because most banks calculate interest based on your balance on the posting date.
How to find your bank's posting schedule
Your account agreement or the disclosure statement you received when you opened the account will state the posting frequency. If you cannot find it, log into your online banking portal and look for "account details," "disclosures," or "rates and terms." Most banks also list this information on the product page for the savings account.
If the website does not say, call the bank's customer service line and ask: "How often does interest post to my account?" They will give you a specific answer — monthly, quarterly, or annually. Write it down so you know when to expect the deposit.
Some banks show interest accrual in real time on your account dashboard, even though it does not post until month-end. This is helpful because you can see your balance growing daily, even if the money does not officially arrive until later.
What happens to interest if you withdraw money before posting
If you withdraw money before the posting date, you typically lose the interest that has accrued but not yet posted. Most banks calculate interest based on your balance on the posting date, not on your average balance throughout the month. So if you have $10,000 on the 1st and withdraw $5,000 on the 29th, the bank calculates interest on $5,000 for the month.
Some banks use an average daily balance method instead, which means they average your balance across all days in the month. This is less common but more favorable to savers who move money around. Check your account agreement to see which method your bank uses.
If you are saving toward a specific goal and need the money on a certain date, time your withdrawal for after the posting date. If posting is on the 30th and you need the money on the 28th, you will miss that month's interest.
High-yield savings accounts and money market accounts
High-yield savings accounts almost always post interest monthly because they are designed to be simple, liquid accounts. Money market accounts vary — some post monthly, others quarterly. The higher the rate, the more likely the account posts monthly, because online banks that offer competitive rates use monthly posting as standard.
When comparing high-yield accounts, the APY is what matters, not the posting frequency. A 4.75% APY account will earn you the same amount whether it posts monthly or quarterly. The posting frequency only affects the timing of when you see the money, not how much you earn.
If you are choosing between two accounts with the same APY, monthly posting is slightly more convenient because you see your interest more often and can reinvest it sooner if you want to move it elsewhere.
CDs and other fixed-rate products
Certificates of Deposit (CDs) typically post interest monthly or quarterly, depending on the term and the bank. A 3-month CD might post quarterly (at maturity), while a 1-year CD might post monthly or annually. The account agreement will specify.
With a CD, you cannot withdraw the money before maturity without paying a penalty, so the posting frequency matters less than with a savings account. The interest will be there when the CD matures, whether it posted monthly or sat in an accrual account until the end.
Some banks offer CDs that post interest monthly so you can withdraw the interest without breaking the CD. This is useful if you want to live on the interest income while keeping the principal intact. Ask your bank whether this option is available.
Frequently Asked Questions
Can I get interest posted more than once a month?
Some banks offer daily posting, but it is rare. Most online banks post monthly because it is simpler to administer. If daily posting matters to you, ask your bank directly — a few credit unions and specialty accounts offer it, but you may need to search for them specifically.
What if my bank changes its posting schedule?
Banks can change posting frequency, but they must notify you in advance, usually 30 days. Check your email and account statements for notices. If you disagree with the change, you can close the account and move your money to a different bank.
Does posting frequency affect my taxes?
No. The IRS counts interest as income in the year it is earned, not when it posts to your account. Your 1099-INT will reflect interest earned in the calendar year, regardless of when the bank posted it.
If I close my account mid-month, do I lose the accrued interest?
Usually yes, unless the bank has already posted it. If you close on the 15th and posting is on the 30th, you will not receive that month's interest. Close your account after the posting date if you want to capture the final month's interest.
Why do some banks post quarterly instead of monthly?
Older accounts, certain CD products, and some credit union accounts use quarterly posting because it was standard before online banking. It costs the bank slightly less to process interest four times a year instead of twelve, but the difference to you is negligible if the APY is the same.