How to earn $40,000, $50,000 and $60,000 in interest alone every year for retirement

An interest-only retirement plan can fund your retirement without draining your savings, but you will need to save a lot of money to make it possible. CNBC crunched the numbers, and we can tell you how much you need to save every month, broken down by age, to get $40,000, $50,000 and $60,000 every year in an interest-only retirement. Check out this video to learn how much you will need to turn that dream into a reality.