Health FSAs are available only through employers that offer them. You will be asked at open enrollment to determine how much money you want to put in your FSA, and your employer will deduct that amount in pretax dollars from your paycheck.
Contribute only what you think you will spend on qualified expenses for one year, because any leftover amount in your health FSA will be forfeited at the start of the new year. You can decide how much to put in for the following year during open enrollment. Different employers have different open enrollment periods, so check with your human resources or benefits department to find out when yours is scheduled. You cannot take the FSA with you if you leave your employer.
Typically, your employer’s FSA administrator will send you a debit card that you can use to spend your funds. If you need to, you can spend your whole contribution amount on one qualified expense, or you can use it throughout the year to pay doctor’s copays and purchase prescriptions and other authorized items.
Review IRS publication 502 to see what generally qualifies as a health care expense for an FSA.