An early retirement is a dream for many, but calling it quits if you're too young has several potential drawbacks. For starters, you could incur a 10 percent early-withdrawal penalty if you tap certain retirement accounts, including 401(k)s and IRAs, before age 59½. (There are exceptions.) You can claim Social Security as early as age 62, but your benefit will be reduced by as much as 30 percent from what it would be if you wait until your full retirement age, which falls between 66 and 67 depending on your year of birth.
Health care is another big issue. You must be 65 to qualify for Medicare. In the meantime, without access to an employer-sponsored plan, you might have to pay a lot more out of pocket for individual coverage until you're eligible for Medicare.
And speaking of health, the longer you live in retirement, the more likely you are to outlive your nest egg. Let's say you make it to the age of 90. A $1 million portfolio evenly split between stocks, bonds and cash has a 92 percent likelihood of lasting until you turn 90 if you retire at 65, according to Vanguard. But retire at age 55 and the likelihood drops to 66 percent. Use our Retirement Savings Calculator to determine when you can really afford to retire.