Physicians, surgeons, and even veterinarians all earn some of the biggest salaries of any occupation. Thus, entering the medical profession as a doctor is a fast track to early retirement. The earning power is so substantial that you can live quite well while still having lots of extra money. Invest that surplus income wisely and you will amass a tremendous nest egg early in your career. The biggest obstacle is student loan repayment, since doctors must stay in college for many years. Do an aggressive job of repaying those loans and then you will be free to save for your retirement. Doctors earn salaries that typically start at around $90,000 a year and then go as high as millions of dollars. Your salary will depend on what type of medical specialty you choose, and where you decide to work. Those who work in private hospitals performing highly specialized surgery, for instance, tend to be in the highest income bracket. Anesthesiologists, who are also doctors, can also earn huge salaries and oftentimes they work fewer hours than physicians.