How do savings accounts compound interest?
Savings accounts typically compound interest daily or monthly, depending on the financial institution. When interest compounds, the bank calculates interest on your total balance including any previously earned interest. For example, if you have $10,000 earning 4.5% APY compounded monthly, the bank divides the annual rate by 12 to get a monthly rate of 0.375%. After the first month, you earn $37.50 in interest, bringing your balance to $10,037.50. The next month, interest is calculated on this new higher balance. Over time, this compounding effect accelerates your savings growth significantly. The more frequently interest compounds, the more you earn, though the difference between daily and monthly compounding is relatively small for most account sizes.