Although health savings accounts currently have $10 billion in assets and are used by eight million people, those assets are expected to rise to $71 billion within fives years, Forbes reports.

And as more employers turn to HSAs as a way of defraying healthcare costs, financial advisers are urging investors to take a hard look at the fees they pay—particularly for accounts that have $2,000 or more in assets. That frequently is the threshold at which investors can move their money out of ultra-safe investments such as CDs and money market funds into equity mutual funds.

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