Interest accrues daily, but you see it credited on a schedule set by your bank

Your savings account earns interest every single day you hold money in it. That daily accrual is calculated on your balance at the end of each business day. But the bank does not add that interest to your account every day — it credits the total to your balance on a schedule, usually monthly or quarterly, depending on the bank and the account type.

The gap between when interest accrues and when it posts matters because you only earn additional interest on money that has actually been credited to your account. If your bank accrues interest daily but credits it quarterly, you will not earn interest on the accrued interest until the quarter ends and it hits your balance.

Key Takeaways

  • Interest accrues every business day based on your end-of-day balance, but posting happens on a separate schedule — usually monthly or quarterly.
  • The difference between accrual and posting means you may wait weeks or months before earning interest on your interest.
  • High-yield savings accounts typically credit interest monthly, while traditional savings accounts may credit quarterly or less often.
  • Your account agreement or the bank's disclosures will state both the accrual method and the posting frequency.

Daily accrual: how the bank calculates what you earn

Most banks use the daily balance method to calculate interest. At the end of each business day, the bank looks at your account balance and multiplies it by the annual percentage yield (APY) divided by 365 days. That daily amount is your accrued interest for that day.

If you have $10,000 in an account with a 4.5% APY, the bank calculates your daily interest as roughly $1.23 per day ($10,000 × 0.045 ÷ 365). That amount accrues whether or not it appears in your balance yet. If you deposit an additional $5,000 on day 15, the daily accrual amount increases starting the next business day, because the calculation now uses $15,000 instead of $10,000.

Some banks use the average daily balance method instead, which averages your balance across all days in the period before calculating interest. This is less common in savings accounts but more common in money market accounts. The result is usually similar, but the timing of deposits and withdrawals matters more.

Posting frequency: when the interest actually hits your account

Once interest has accrued, the bank credits it to your account on a schedule. Most high-yield savings accounts post interest monthly — on the last day of the month or the first day of the next month. Traditional savings accounts at brick-and-mortar banks often post quarterly (every three months) or even annually, though this is becoming less common.

The posting date is what matters for your balance and for calculating future interest. Until interest posts, it exists only as an accrued amount in the bank's records. After it posts, it becomes part of your balance and begins earning interest itself — a process called compounding.

You can find the posting frequency in your account agreement or in the bank's disclosure documents, often labeled "Frequency of Compounding" or "Interest Crediting Schedule." If you cannot find it online, call the bank or visit a branch and ask directly.

The difference between accrual and posting: why timing matters

The gap between accrual and posting affects how much you ultimately earn. If interest accrues daily but posts only once a year, you earn no interest on that accrued interest for up to 12 months. With monthly posting, you earn interest on your interest 12 times per year instead of once.

This is why the APY (annual percentage yield) matters more than the APR (annual percentage rate). The APY already accounts for how often interest compounds — it shows you the real return you will get over a year, assuming you do not withdraw money. A 4.5% APY with monthly compounding will earn you more than a 4.5% APY with annual compounding, even though the stated rate is the same.

For example, $10,000 at 4.5% APY with monthly compounding earns about $460 in the first year. The same $10,000 at 4.5% APY with annual compounding earns about $450. The difference grows larger with bigger balances and longer time periods.

How to find your account's accrual and posting schedule

Your bank must disclose both the accrual method and the posting frequency. Look for these details in the account agreement you received when you opened the account, or search the bank's website for "savings account disclosures" or "truth in savings." Many banks now post this information in the account details section of their online banking portal.

If the information is not straightforward to find, contact the bank directly. Ask specifically: "How often does interest accrue?" and "How often is interest credited to my account?" A customer service representative can give you both answers in one call.

If you are comparing savings accounts at different banks, the posting frequency is worth factoring in. A bank offering 4.5% APY with monthly posting will earn you more than a bank offering 4.5% APY with quarterly posting, all else equal.

What happens to accrued interest if you close your account

If you close your account before the posting date, you will receive the accrued interest that has already been credited to your balance. Interest that has accrued but not yet posted is typically forfeited, depending on the bank's policy.

Some banks will credit accrued interest even if you close the account before the regular posting date, especially if you have held the account for a full interest period. Others will not. Check your account agreement or ask before you close the account if you are concerned about losing accrued interest.

How interest rates and posting frequency interact

A higher interest rate with infrequent posting can sometimes earn less than a lower rate with frequent posting, though the difference is usually small. A 4.0% APY posted monthly will earn slightly more than a 4.1% APY posted annually on the same balance, because the monthly compounding effect outweighs the slightly lower rate.

In practice, the banks offering the highest rates — typically online banks — also post interest monthly or more frequently. Traditional banks with lower rates often post less frequently. So you are unlikely to face a real choice between high rates and slow posting. But if you do, the APY comparison will show you the true outcome.

Frequently Asked Questions

Does interest accrue on weekends and holidays?

Interest accrues on your balance every day, including weekends and holidays. The bank calculates it based on your end-of-day balance, and the calendar day does not matter. However, deposits or withdrawals made on weekends or holidays typically do not affect your balance for interest purposes until the next business day.

If I withdraw money before interest posts, do I lose the accrued interest?

No. Accrued interest is calculated on your balance at the time of accrual. If you withdraw money after interest has accrued but before it posts, you keep the accrued interest — it will still be credited on the regular posting date. However, your future accrual will be lower because your balance is now smaller.

Can I get interest posted more frequently than my bank offers?

No. The posting frequency is set by the bank and is the same for all customers with that account type. You cannot request monthly posting if the bank only posts quarterly. If frequent posting matters to you, you would need to switch to a bank that posts more often.

Why do some banks post interest on different dates?

Banks choose their posting schedule based on their systems and operations. Some post on the last day of the month, others on the first day of the next month. A few post on the 15th. The exact date does not affect how much you earn — only the frequency matters. Check your account agreement to see your bank's specific date.

Does the APY already include the effect of how often interest posts?

Yes. The APY is calculated assuming interest compounds at the frequency your bank uses. So a 4.5% APY already accounts for whether your bank posts monthly, quarterly, or annually. You can compare APYs directly across banks without adjusting for posting frequency.