These US healthcare systems are effectively scams. Yes in theory they can save you money, however in theory there is no difference between theory and practice, while in practice there is.
Maybe so! The one at mine worked like this:
-
You elect in advance how much you want to fund your FSA in the next upcoming period (year)
-
On day 1 of that period the FSA is available to you to spend on eligible expenses. Within 2 weeks I spent the full years elected amount (one surgery).
-
For the duration of the period they deduct (pre-tax) the total FSA election / pay periods (ie. $2000/24 in my case). And that would repeat through the full period (year).
So in my case, leaving after paycheck 1 of that period, but spending 100% of the elected funds means I paid: 1x(2000/24)= $83. But I spent $2000. Upon leaving that meant they did not collect $1917.