How to invest your HSA funds
An HSA can do double duty as a retirement account. Here's how to set up investing, the minimum balance rules, and a simple strategy.
HSAs are the only account in the US tax code with a triple tax advantage: contributions are pre-tax, growth is tax-free, and withdrawals for qualified medical expenses are tax-free. Once balances exceed a minimum, you can invest them in mutual funds or ETFs — turning your HSA into a stealth retirement account.
Before you start
- Check your custodian's investment threshold — Many require a minimum cash balance ($1,000 is typical) before you can invest the rest.
- Confirm you can afford to leave the money invested — If you'll need it for near-term medical expenses, keep that portion in cash to avoid selling at a loss.
- Have an emergency medical fund elsewhere — A taxable account or savings for unexpected, non-medical expenses.
Set up investing
- Log in to your HSA custodian
Find the 'Investments' or 'Invest your HSA' section. The link is sometimes buried — check under Account Settings if you can't find it.
- Open the investment account
Some custodians require a separate account or a brokerage sub-account to be enabled. Agree to the disclosures and authorize the link.
- Pick your funds
Most custodians offer 10–30 mutual funds. A simple option: a low-cost total market index fund (or target-date fund) for the long-term portion.
- Set up auto-invest
If supported, set a rule like 'sweep balances above $2,000 into investments every month.' This keeps the working cash buffer intact and the rest growing.
- Review fees
Watch out for monthly account fees, investment fees, or fund expense ratios. Choose the cheapest funds with broad diversification.
A simple long-term strategy
- Pay current medical expenses out of pocket if you can afford it. Save the receipts.
- Let the HSA balance grow invested for decades.
- Track receipts of qualified medical expenses you didn't reimburse — there's no time limit on reimbursement. You can withdraw tax-free later for any of those past expenses.
- After age 65, withdraw for any reason. Non-medical withdrawals are taxed as regular income (like a traditional IRA), with no penalty.
FAQ
- Can I lose money in my HSA?
Yes, if you invest in market-based funds. The cash portion of your HSA is FDIC-insured, but invested balances rise and fall with the market.
- What happens to my HSA when I turn 65?
You can still use it tax-free for qualified medical expenses. Non-medical withdrawals are taxed as ordinary income but no longer incur the 20% penalty. You can also use HSA funds to pay Medicare premiums tax-free.
- Can I move my HSA to a different custodian to invest?
Yes — you can do a trustee-to-trustee transfer to any HSA provider you like. Useful if your employer's HSA has high fees or limited investment options.