You cannot contribute to an HSA while you have a general-purpose FSA. Not your own, and in most cases not your spouse's either.
But there is a version of the FSA that is built to pair with an HSA. Here is the full rule.
Why a general FSA blocks the HSA
A general-purpose FSA can pay for any qualified medical expense from dollar one. The IRS treats that as "other coverage" that disqualifies you from contributing to an HSA.
It does not matter that the FSA is great. If you are covered by one, you cannot put money in an HSA for those months.
The spouse trap
This is the one that surprises people.
If your spouse has a general-purpose FSA through their job, it can cover your expenses too. That means you are considered covered, and you cannot contribute to your own HSA.
So a spouse's FSA election can quietly void your HSA eligibility for the whole year.
The FSA that actually pairs with an HSA
A limited-purpose FSA only covers dental and vision. Because it cannot pay general medical bills, it does not disqualify you from the HSA.
This is the combo power users run on purpose:
| Account | Covers | Pairs with HSA? |
|---|---|---|
| General-purpose FSA | Any medical | No |
| Limited-purpose FSA | Dental and vision only | Yes |
| Dependent care FSA | Childcare, not medical | Yes |
General-purpose FSA
- Covers
- Any medical
- Pairs with HSA?
- No
Limited-purpose FSA
- Covers
- Dental and vision only
- Pairs with HSA?
- Yes
Dependent care FSA
- Covers
- Childcare, not medical
- Pairs with HSA?
- Yes
A dependent care FSA also pairs fine, because it covers childcare, not medical care.
How to actually use the combo
Run the limited-purpose FSA for predictable dental and vision costs. Braces, glasses, contacts. Spend those pre-tax FSA dollars first.
Keep funding and investing the HSA for everything else. You get a second pre-tax bucket without touching your HSA eligibility.
The one-line takeaway
General FSA and HSA: pick one. Limited-purpose FSA and HSA: run both, on purpose. And check what your spouse elected before you assume you are clear.
*This is educational content, not financial or tax advice. Consult a qualified professional before making decisions about your HSA.*