via Wall Street Journal

I’m working with a financial adviser who suggests that, for planning purposes, my nest egg should last until I reach age 100. I understand the need for erring on the side of caution, but that figure seems somewhat excessive. Can you recommend a good tool for estimating one’s life expectancy?

Actually, that suggestion makes more sense than you might think. Between 1980 and 2010, the population age 90 and older nearly tripled, reaching 1.9 million people, according to the Census Bureau. Over the next four decades, the 90-plus demographic is expected to quadruple. (And just FYI: The U.S. had 53,364 centenarians in 2010.)

The point: Many people, when planning for retirement, tend to underestimate their life expectancy and, as a result, tend to overestimate how much they can spend after they leave the office..

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