Your FSA evaporates. Your employer contributions to your 401k might vest on a schedule. But your HSA? It's yours. Full stop.
This is not financial advice. But here are the facts, because a lot of people leave this money sitting untouched out of confusion.
The good news first: you keep everything
An HSA — a Health Savings Account — belongs to you, not your employer. The day you quit, the account doesn't close. The balance doesn't shrink. The investments inside it keep growing, tax-free. You take it with you the same way you'd take a bank account.
This is the single biggest difference between an HSA and a Flexible Spending Account (FSA). An FSA is use-it-or-lose-it, tied to your job. An HSA follows you forever.
What stops when you quit
You can no longer contribute to your HSA once you lose your High-Deductible Health Plan (HDHP) coverage. HSA eligibility is tied to the type of health insurance you have, not your employment status. No HDHP, no new contributions.
The 2026 contribution limits, per the IRS, are $4,300 for self-only coverage and $8,550 for family coverage. If you quit mid-year, your contribution limit is prorated by the months you were covered. Don't over-contribute — the IRS charges a 6% excise tax on excess contributions.
If you sign up for COBRA and elect an HDHP plan, you can still contribute during that coverage window. Most people can't stomach COBRA premiums, but it's an option worth knowing about.
What you can still do with the money
Everything you could do before. The account doesn't freeze.
- Pay for qualified medical expenses tax-free — doctor visits, prescriptions, dental, vision, mental health
- Reimburse yourself for old medical expenses you paid out-of-pocket while the account was open (the IRS has no time limit on this, as long as you have receipts)
- Pay your COBRA premiums — health insurance premiums are normally not an eligible HSA expense, but COBRA premiums are a named exception under IRS rules
- Keep the money invested in whatever you had it in
The age 65 rule that makes this account even better
Once you turn 65, the 20% penalty for non-medical withdrawals disappears. At that point the account behaves exactly like a traditional IRA: withdraw for anything, pay ordinary income tax, no penalty. If you use it for medical expenses, it's still tax-free.
This is why financial planners call the HSA a "stealth retirement account." Triple tax advantage — contributions pre-tax, growth tax-free, withdrawals tax-free for medical — and at 65 it converts to a regular retirement account anyway.
The one costly mistake
Using HSA money for non-medical expenses before age 65. You'll owe income tax on the withdrawal plus a 20% penalty. That turns a $1,000 withdrawal into maybe $600 after taxes and penalties, depending on your bracket. Leave the money alone. You will have medical expenses. This account is tailor-made to pay for them tax-free.
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