Interest accrues daily, but deposits to your account happen on a schedule set by your bank

High yield savings accounts calculate interest on your balance every single day. That daily calculation is called accrual. But the money actually moving into your account—called a deposit or posting—happens less often. Most banks deposit accrued interest monthly, though some do it quarterly or even daily. The difference matters because you only earn interest on money that has been posted to your account.

Here is the concrete timeline: On day one, you have $10,000 in the account earning 4.50% APY. The bank calculates that day's interest (about $0.12) and adds it to a running total. On day two, it calculates interest on $10,000.12. This happens every day. Then, on the last day of the month (or quarter, depending on the bank), the bank deposits the entire month's accrued interest into your account at once. From that point forward, you earn interest on the larger balance.

The timing of that deposit is set by the bank's own schedule, not by federal law. Some banks post interest on the first business day of the next month. Others post on the 15th. A few post daily. Check your account agreement or call the bank to find out when yours posts—it is usually listed under "interest posting schedule" or "frequency of interest compounding."

Key Takeaways

  • Interest accrues (is calculated) every day based on your current balance, but the money is only added to your account on your bank's posting schedule, usually monthly.
  • The posted interest becomes part of your balance when ready, so you earn interest on that interest in the following period—this is called compounding.
  • Monthly posting is standard at most high yield savings banks, though some post quarterly or daily.
  • The frequency of posting affects how quickly your balance grows, so comparing posting schedules matters when choosing between banks with similar APY rates.

Why the difference between accrual and posting matters

Accrual and posting are different steps, and the gap between them affects your actual earnings. When interest accrues, the bank is tracking what you have earned but not yet paid you. When it posts, you own that money and it becomes part of your balance.

This distinction becomes visible if you withdraw money mid-month. If you withdraw $5,000 on the 15th of a month where interest posts on the 30th, you lose the interest that accrued on that $5,000 from the 15th to the 30th. The bank calculates interest only on the money that was actually in the account on each day. Once you withdraw it, no more interest accrues on it. The interest that had already accrued on it before the withdrawal still posts at month-end, but future accrual stops when ready.

For most people keeping money in the account, this does not matter much. But if you are moving money in and out frequently, the posting schedule affects your total return. A bank that posts daily will credit you for interest sooner, so you start earning interest on that interest sooner. A bank that posts quarterly will hold your accrued interest for up to three months before adding it to your balance.

How compounding works with different posting schedules

Once interest posts to your account, it becomes part of your balance. The next day, the bank calculates interest on the new, larger balance. This is compounding—earning interest on your interest.

The math is small but real. Say you have $10,000 at 4.50% APY. In the first month, you earn about $37.50 in interest. If that posts on the 30th, your balance becomes $10,037.50. In the second month, you earn interest on $10,037.50, not just $10,000. Over a year, monthly compounding adds up to noticeably more than if interest posted only once a year.

Banks that post daily compound faster than banks that post monthly, which compound faster than banks that post quarterly. The difference between monthly and daily posting on a $10,000 balance at 4.50% APY is roughly $0.50 to $1.00 per year—small enough that it should not be your only factor in choosing a bank, but real enough to notice if you are comparing two banks with identical rates.

What your account agreement actually says about posting

Your bank's account agreement or disclosure document lists the posting schedule, usually under a section called "Interest" or "Compounding and Crediting of Interest." The language varies. Some banks say "interest is credited monthly on the last business day of the month." Others say "interest compounds daily and is credited monthly." A few say "interest is compounded and credited daily."

"Compounded daily, credited monthly" means the bank calculates interest every day but only deposits it once a month. "Compounded and credited daily" means both the calculation and the deposit happen every day. The second option is better for your earnings, but it is less common because it requires more processing on the bank's end.

If you cannot find this information in your agreement, call the bank's customer service line and ask: "When does interest post to my account?" They will tell you the exact date or frequency. Write it down so you know when to expect the deposit.

How posting schedule affects your decision between banks

If you are comparing two high yield savings accounts with the same APY, the posting schedule is a tiebreaker. A bank offering 4.50% APY with daily posting will earn you slightly more than a bank offering 4.50% APY with quarterly posting. The difference is small—usually less than $2 per year on a $10,000 balance—but it is real.

More important than posting frequency is whether the bank's APY is competitive right now. APY rates change constantly. A bank posting daily at 4.25% will earn you less than a bank posting monthly at 4.75%, even though the daily posting is technically more efficient. Check the current rates at several banks before you open an account, because the rate difference will outweigh the posting schedule difference.

Also check whether the bank has any minimum balance requirements or fees that could eat into your interest earnings. Some banks offer high APY only on balances above $25,000. Others charge a monthly fee if your balance drops below a threshold. These costs can wipe out the benefit of a slightly higher rate or a better posting schedule.

What happens if your bank changes its posting schedule

Banks can change their posting schedule, though they must notify you in advance. If your bank switches from monthly posting to quarterly posting, you will earn less interest because your accrued interest sits longer before being added to your balance. If it switches to daily posting, you will earn slightly more.

Banks usually announce changes in writing—either in a letter, an email, or a notice on your account page. The change takes effect on a date the bank specifies, usually at least 30 days after the notice. If you disagree with the change, you can close the account and move your money to a different bank. There is no penalty for closing a high yield savings account, though you should check whether the bank requires a minimum balance or has any other restrictions.

Frequently Asked Questions

If my bank posts interest monthly, do I lose interest if I withdraw money before the posting date?

No. Interest accrues daily on the balance you have on each day. If you withdraw $5,000 on the 15th, you stop earning interest on that $5,000 from the 15th onward, but you keep the interest that accrued on it from the 1st to the 15th. That accrued interest still posts at month-end.

Does a higher APY rate matter more than how often interest posts?

Yes. A 0.25% difference in APY will earn you far more than the difference between daily and monthly posting. On $10,000, the APY difference is about $25 per year, while the posting schedule difference is less than $2. Prioritize finding the highest current rate, then use posting frequency as a tiebreaker between banks with similar rates.

Can I move my money to a bank with daily posting and earn more interest?

You can move your money, but the interest difference will be small. If you are moving from a bank at 4.50% APY with monthly posting to a bank at 4.50% APY with daily posting, you will earn roughly $1 to $2 more per year on a $10,000 balance. The switching is worth it only if the new bank also has a higher rate or lower fees.

What if my bank posts interest quarterly instead of monthly?

Quarterly posting means your accrued interest sits for up to three months before being added to your balance. You earn slightly less than you would with monthly posting because compounding happens less often. If you are choosing between banks, prefer monthly or daily posting over quarterly, all else equal.