I'm looking in to this also after having BCBS basic my whole career. They've been great, but the premiums are just getting out of control.I was trying to find out about this. So, it takes the entire year for the plan-contributed HSA money to reach it's max ($1200 single/$2400 family), right?
With the FSA, the designated contribution is available for payment reimbursement on Jan 1, then payroll deductions pay it off over the whole year.
I just found out that one can do a health plan with an HSA, contribute up to the allowable maximum (if desired) AND get a special "Limited Expense FSA". The Limited Expense FSA is strictly for eligible dental and vision expenses. So for 2026, we can put $3400 pre-tax into a Limited FSA, and another $4400 single/$8750 family into the HSA.
The FSA is allowing $680 to carry over to the next year so you have to spend enough on dental or vision or calculate a lower contribution. As others have explained, unspent HSA money stays with you. Most people won't have that much dental or vision, but if you want braces or Lasik or something that could be a good plan for a given year, allowing you to save the HSA money from being spent.
I think the HSA money does accumulate over the year, but even if you incur costs before you build up money in the HSA, you can still just wait and use the money in the HSA later on as long as you keep receipts for anything that you paid for after the HSA was created in case you get audited. So do whatever you want, save receipts, then add HSA money for it after the fact, and withdraw later, unless I'm misunderstanding.
For you MHBP people, in the provider directory, we would use the "MHBP - Aetna Choice® POS II Network" plan option, right? This directory kinda sucks, at least for me. I have to put a really large radius, then change to map option, then zoom back out and focus on my location to easily see providers in my area. Even then most of them don't show up unless I type in a specific name and it can find them in network. If I put my zip code and a 10 mile radius it shows zero providers even though there are lots of them.
Using this: Aetna