If I have both an HSA and an FSA, which account pays first?

If I have both an HSA and an FSA, which account pays first?: Further will always attempt to pay your expenses from the FSA first as this is a “use it or lose it” type of account. However, medical expenses can’t be paid from the FSA during the HDHP deductible so the FSA will be bypassed in this circumstance. To make your FSA work with HSA requirements, your employer should provide a special FSA plan for you instead of a general purpose FSA. A limited purpose FSA is a special FSA that can’t be used for medical expenses but can be used for vision and dental expenses. A post-deductible FSA can pay vision and dental expenses immediately and can also pay medical expenses once the deductible has been satisfied. If the FSA is limited to vision and dental, it can pay for these claims first. However, keep in mind they’re also eligible expenses under the HSA.