What is the difference between an FSA and an HSA?

Flexible Spending Accounts (FSAs) allow you to contribute pre-tax dollars to an account managed by your employer. This money can be used for health care spending, but anything left over at the end of the year is forfeited. 

HSAs allow you to contribute pre-tax dollars into an account that is owned and managed by you, the employee. The money is used for health care expenses, but unlike an FSA, the unspent amount can remain in the account year after year and it stays with you in the event you terminate from your employer.