The average size of a Social Security check, the impact of delayed retirement credits, and insight into life expectancy can help you decide when to claim.

Millions of Americans are approaching retirement, and one of the most important financial decisions retirees will make is when to begin receiving their Social Security benefits. Choose to receive benefits early, and you could leave tens of thousands of dollars on the table. Wait to claim Social Security until you're older, and you might end up with a bigger check that you'll be less able to enjoy because of failing health.