Interest accrues daily but you receive it monthly
Yes. High yield savings accounts calculate interest on your balance every single day, but the bank deposits that interest into your account once a month. This matters because it means your money is earning from day one, even though you don't see the deposit until the end of the month.
The daily accrual happens automatically. The bank takes your account balance at the end of each day, applies a fraction of the annual percentage yield (APY) to it, and adds that tiny amount to an internal tally. At the end of the calendar month, the bank adds up all those daily amounts and deposits the total as a single payment into your account.
Some banks pay interest on a different schedule—weekly or quarterly—but monthly is standard for most high yield savings accounts. Check your account agreement or the bank's website to confirm the exact payment date, because it varies by institution.
Key Takeaways
- Interest is calculated on your balance every day, which means deposits and withdrawals change how much you earn that day.
- The monthly deposit is the sum of all those daily calculations, not a single lump calculation at month's end.
- Your balance grows faster with daily accrual than with monthly or quarterly accrual, even at the same APY.
- The interest you receive in month two includes earnings on the interest you received in month one—this is compounding.
Why daily accrual matters more than you might think
The difference between daily accrual and monthly accrual is small in the short term but compounds over time. If you have $10,000 in an account earning 4.50% APY, daily accrual means you earn roughly $1.23 per day. With monthly accrual, the bank would calculate interest only once, on your average balance for the month. Daily accrual always produces slightly more interest because you earn on every balance change immediately.
This effect accelerates when you add money to the account. If you deposit $5,000 on the 15th of the month, daily accrual means that $5,000 starts earning interest that same day. Monthly accrual would not count it until the next month's calculation. Over a year, those extra half-months of interest add up.
The reverse is also true: if you withdraw money mid-month, daily accrual stops earning on that amount immediately, whereas monthly accrual would have counted it for the full month.
How compounding works with monthly interest deposits
When the bank deposits your monthly interest, that interest becomes part of your balance. The next day, the daily accrual calculation includes the new, higher balance. This means you earn interest on your interest—the definition of compounding.
In month one, you earn interest on your original deposit. In month two, you earn interest on your original deposit plus the interest from month one. In month three, you earn interest on all three amounts. Over years, this effect becomes substantial. A $10,000 deposit at 4.50% APY with monthly compounding grows to roughly $12,214 after five years, compared to $10,000 with no interest at all.
What happens if you withdraw money before the monthly deposit
You do not forfeit the interest you have earned so far in the month. The bank still deposits your full monthly interest payment, calculated from all the days you held the money. If you withdraw on the 20th of the month, you keep the interest earned from the 1st through the 20th, and the bank deposits it on the last day of the month along with interest from the remaining days (if any).
However, you stop earning interest the moment you withdraw. If you pull out $5,000 on the 20th, that $5,000 earns nothing from the 21st onward. Only the money that remains in the account continues to accrue daily interest.
Banks that pay interest more or less frequently
Most major high yield savings banks—including Marcus, Ally, American Express Personal Savings, and Discover—pay interest monthly. Some smaller banks or credit unions pay quarterly or even annually, which means your money sits longer before you see the deposit. A few online banks pay weekly, which accelerates compounding slightly but is rare.
The APY quoted by the bank already accounts for the compounding frequency. A 4.50% APY assumes monthly compounding (or whatever the bank's actual schedule is). You do not need to adjust the rate yourself; the bank has already done that math. What matters is comparing APYs across banks, because the rate already reflects how often interest compounds.
How to verify your interest is accruing correctly
Check your account statement at the end of the first month. The interest deposit should appear as a single line item, usually labeled "Interest Paid" or "Interest Earned." The amount should match the bank's APY applied to your average daily balance for that month.
If you want to do the math yourself: take your average daily balance for the month, multiply it by the APY, and divide by 12. That rough calculation should be close to what the bank deposited. It will not be exact because the APY is an annual rate and your balance likely changed during the month, but it should be within a few cents.
If the deposit is significantly lower than expected, contact the bank. Errors are rare, but they happen. Most banks have a customer service line or chat available to explain any discrepancy.
Frequently Asked Questions
Can I withdraw my interest before the monthly deposit?
No. Interest accrues in the bank's system but does not appear in your account until the monthly deposit. You cannot withdraw it early. Once it is deposited, it becomes part of your balance and you can withdraw it like any other money.
Does the APY change if I make deposits during the month?
The APY itself does not change, but the amount of interest you earn that month does. If you deposit more money mid-month, that new money earns interest at the same APY for the remaining days. Your total monthly interest will be higher because your average daily balance is higher.
What if my bank changes the APY mid-month?
The interest for that month is calculated using both rates. Days under the old rate earn at the old rate; days under the new rate earn at the new rate. The bank combines both amounts in your monthly deposit. Your account agreement should specify when rate changes take effect.
Is daily accrual better than daily compounding?
They are the same thing in practice. Daily accrual means interest is calculated daily. Monthly compounding means that accrued interest is added to your balance monthly so it earns interest itself. Together, they produce the APY the bank advertises.
Do I owe taxes on interest I have not received yet?
Yes. The IRS counts interest as income in the year it accrues, not when you receive it. If you earn $50 in interest during December but the bank does not deposit it until January, you report that $50 on your current year's tax return. The bank will send you a 1099-INT form showing all interest earned that year.