Interest is added on a schedule set by your bank, usually daily or monthly
Your bank calculates and posts interest to your savings account on a fixed schedule. Most banks compound interest daily, meaning they calculate what you owe every single day, but they post (actually add) that money to your account monthly or quarterly. Some banks post interest weekly. A few still post only once a year, though this is rare now.
The schedule matters because it affects when you see the money and how much total interest you earn over time. Daily compounding with monthly posting is the most common arrangement at large banks. Credit unions and online banks often post more frequently — sometimes daily or weekly — which means you see the interest hit your account sooner.
Your account agreement or the bank's disclosure statement will tell you the exact schedule. Look for language like "interest is compounded daily and posted monthly" or "interest compounds and posts quarterly." If you cannot find it online, call the bank's customer service line and ask directly.
Key Takeaways
- Most banks calculate interest every day but add it to your account once a month or once a quarter.
- The posting schedule is in your account agreement or the bank's rate disclosure sheet, which you can find online or request by phone.
- More frequent posting means you earn interest on your interest sooner, though the difference is small on typical account balances.
- The interest rate itself matters far more than the posting schedule — a 4.5% APY posted monthly beats a 0.01% APY posted daily.
Why banks compound daily but post monthly
Daily compounding means the bank calculates interest on your balance every single day, including the interest from the day before. This is called compound interest — you earn interest on your interest. If you have $10,000 in the account and the bank compounds daily, it calculates interest on $10,000 on day one, then on $10,000 plus that day's interest on day two, and so on.
Monthly or quarterly posting is when the bank actually transfers that accumulated interest into your account where you can see it and use it. Between postings, the interest sits in a calculation but not in your balance. Once it posts, it becomes part of your balance and starts earning interest itself in the next compounding cycle.
Banks do this because daily posting would create millions of tiny transactions and slow down their systems. Monthly or quarterly posting is more efficient for them while still giving you the benefit of daily compounding.
How the posting schedule affects your total earnings
The difference between daily posting and monthly posting is small on most balances, but it grows with larger amounts and higher rates. If you have $100,000 at 4.5% APY, posting daily versus monthly might mean an extra $10 to $15 per year in your favor. On $1,000, the difference is under a dollar.
What matters much more is the interest rate itself. A savings account at 4.5% APY posted monthly will earn you far more than one at 0.01% APY posted daily. When you are comparing banks, focus on the APY (annual percentage yield) first, then check the posting schedule as a tiebreaker if two banks offer similar rates.
Some banks advertise "daily interest" to mean daily compounding, not daily posting. Read carefully — the key phrase is "compounded daily and posted [monthly/quarterly]" or "posted daily." If it just says "daily interest," ask the bank what that means before opening the account.
What happens if you withdraw money before interest posts
If you withdraw money before the monthly or quarterly posting date, you lose the interest that has been calculated but not yet posted. The bank does not pay you interest on money you no longer have in the account.
For example: You have $5,000 on June 1. The bank compounds daily throughout June but posts interest on June 30. If you withdraw $2,000 on June 15, you will not receive interest on that $2,000 for the month of June. You will only receive interest on the $3,000 that remained in the account through June 30.
This is why timing matters if you are moving money between accounts or making a large withdrawal. If you know interest posts on the last day of the month, try to keep your balance stable until after that date if you want to capture the full month's interest.
How to find your bank's posting schedule
Start with your account agreement or the rate disclosure sheet. Most banks post these documents online in the account opening section or under "Disclosures" or "Terms and Conditions." Search for words like "interest," "compounded," or "posted."
If you cannot find it online, log into your online banking portal and look for account details or statements. Some banks show the posting schedule in the account summary. If it is still not there, call customer service and ask: "How often does interest post to my account?" They will give you a direct answer.
You can also check your past statements. Look at the deposits that appear to be interest — they usually show up on the same date each month or quarter. That is your posting schedule.
Differences between banks and account types
Large national banks typically post interest monthly. Online banks and high-yield savings accounts often post daily or weekly because they have lower overhead costs. Credit unions vary — some post monthly, others daily.
Money market accounts sometimes post interest differently than regular savings accounts at the same bank. Certificates of deposit (CDs) may post interest monthly, quarterly, or at maturity depending on the term. Always check the specific account type, not just the bank name.
If you are comparing accounts across different banks, the posting schedule is worth noting, but it should not be your main decision point. A 4.0% APY posted monthly at Bank A beats a 3.5% APY posted daily at Bank B, even though Bank B posts more often.
What to do if interest stops posting or posts incorrectly
If you notice that interest has not posted on the expected date, wait a few business days — sometimes posting is delayed by a day or two. Check your account agreement again to confirm the posting date, because it may not be the same as the calendar date.
If interest still has not appeared after the expected posting date has passed, contact your bank. Bring your account agreement and your last few statements showing when interest was posted before. The bank can investigate whether there was a system error or whether something changed with your account.
If the amount of interest posted seems too low, calculate what you should have earned using the APY and your average balance. The bank's website usually has an interest calculator. If your calculation does not match what posted, ask the bank to explain the difference. They may have changed the rate during the month, or there may be a minimum balance requirement you did not meet.
Frequently Asked Questions
Does interest post on weekends or holidays?
No. Banks post interest on business days only. If the posting date falls on a Saturday, Sunday, or federal holiday, the posting happens on the next business day. This means you might see interest appear on a Monday or Tuesday instead of the expected date.
Can I move money between accounts to earn more interest?
You can move money, but timing matters. If you move money out before interest posts, you lose that month's interest on the amount you moved. If you move money in early in the month, it will earn interest for the full month if it stays until the posting date. Moving money between your own accounts does not earn you extra interest — you only earn interest on the balance in the savings account itself.
What is the difference between APY and the interest rate?
APY (annual percentage yield) includes the effect of compounding, while the interest rate does not. If a bank offers 4.5% APY, that is what you will actually earn in a year if you leave the money untouched. The interest rate alone might be slightly lower because APY factors in daily compounding. Always compare APY when looking at different banks.
If my bank posts interest quarterly instead of monthly, am I losing money?
You lose a small amount compared to monthly posting, but the difference is usually less than a few dollars per year on typical balances. The interest rate matters far more. A 4.0% APY posted quarterly will earn you much more than a 0.5% APY posted monthly. If you want frequent posting, look for online banks or credit unions that post daily or weekly.
Does the posting schedule change if I have a promotional rate?
No. Promotional rates follow the same posting schedule as regular rates at that bank. However, promotional rates are temporary — they usually last three to six months, then drop to the bank's standard rate. Check your account agreement to see when the promotional period ends and what the regular rate will be.