A Healthcare Flexible Spending Account, or "FSA," is a pre-tax benefit account that you can use to pay for eligible medical, dental, and vision care expenses that aren’t covered by your health insurance plan. You decide how much to contribute to your Healthcare FSA each year, and funds are withdrawn automatically from each paycheck for deposit into your account before taxes are deducted. The total amount you elect to contribute to your Healthcare FSA each year is available on the first day of your plan year.
Generally, you need to spend the funds in your Healthcare FSA within the plan year. However, your employer may provide you a grace period of 2-½ months after the end of the plan year to spend funds left in your account. Or your employer may allow you to carry over up to $500 left in your account into the next plan year.