Saving Money and Interest
When you put money in a savings account at a bank, the bank pays you a little extra for letting it use your money. That payment is called interest. It is one of the reasons people save instead of keeping all their cash in a drawer.
Suppose you deposit 100 dollars in an account that pays 5 percent interest each year. After the first year, you earn 5 dollars, so your balance is 105 dollars. In the second year, the bank pays interest on 105 dollars, not just the original 100. You earn 5 dollars and 25 cents, and your balance rises to 110 dollars and 25 cents.
Earning interest on interest is called compound interest. At first the extra amounts look tiny, but they grow a little faster every year. If you made no more deposits, that account would hold about 163 dollars after ten years, even though you only put in 100.
The lesson is that time is a powerful helper. The longer money stays in an account, the more it can grow, so people who start saving young have an advantage. Interest rates change from bank to bank and from year to year, so it is smart to ask questions and compare before choosing an account.