Their present $100,000 portfolio would, therefore, grow to $180,611 after 20 years. A risk-averse investor is happy with a modest 3% annual rate of return on their portfolio.Interest payable at the end of each year is shown in the table below. While the total interest payable over the three-year period of this loan is $1,576.25, unlike simple interest, the interest amount is not the same for all three years because compound interest also takes into consideration the accumulated interest of previous periods.
The formula for calculating compound interest in a year is:
