Once you decide to invest HSA surplus above a medical cash floor (HSA investing), the next consumer choice is which custodian holds the account. Employer-default platforms (often HealthEquity, Optum Bank, or a TPA-linked bank) can differ sharply from retail HSAs at Fidelity or Lively on fees, fund menus, and how painful a rollover feels.
Account rules and HSA vs FSA: HSA and FSA basics. HDHP eligibility: High deductible health plans. Contribution caps: HSA contribution limits.
What to compare side by side
| Factor | Why it matters | Questions to ask |
|---|---|---|
| Monthly / account fees | Silent drag on small balances | Is there a fee waived above a balance? Who pays it—you or employer? |
| Investment threshold | Cash trapped below the minimum cannot buy funds | Must you keep $1,000+ in cash before trading? |
| Fund / ETF menu | Determines expense ratios and diversification | Broad index funds available? Transaction fees per trade? |
| Interest on cash | Cash floor still earns something (or nothing) | Sweep APY vs $0 |
| Debit card / claims UX | Day-to-day medical spending | Receipt upload, substantiation tools |
| Rollover / transfer friction | Job change should not trap you | Trustee-to-trustee transfer fee? Paper forms only? |
Fund selection still follows low-cost logic in Investing basics for beginners—custodian shopping is about access and fees, not picking hot sectors.
Worked example
Sam’s employer HSA at a common TPA charges $3/month, requires $2,000 cash before investing, and offers a short list of funds with expense ratios around 0.40%–0.80%. Sam’s deductible cash need is $3,500; surplus above that is about $6,000.
Sam compares a retail HSA at Fidelity (often $0 account fee, broad index ETFs / mutual funds, low or no investment minimum beyond normal fund rules) and Lively (fee schedule and partner brokerage menu—verify current terms). Sam initiates a trustee-to-trustee transfer of the surplus after confirming the employer still allows payroll contributions into the new custodian or will accept a year-end contribution strategy. The $3/month fee and higher ERs would have cost more over a decade than a one-time transfer hassle.
Employer HSA vs retail HSA
- Payroll contributions are easiest when they land in the employer’s custodian. Some employers allow you to change custodians mid-year; many do not until you leave.
- You can often transfer (rollover) from the employer HSA to a retail HSA while keeping the same tax identity—use trustee-to-trustee instructions, not a distribution you “intend” to redeposit without paperwork.
- Employer seed money or matches may require staying with their custodian for a period—read the SPD.
- After you leave the job, transferring to a low-fee custodian is a standard cleanup step before long-horizon investing for future medical costs (HSA for retirement healthcare).
Transfer checklist without the gotchas
- Open the destination HSA and get transfer / rollover instructions.
- Confirm the source custodian’s fee and whether partial transfers are allowed.
- Keep enough cash at the source for pending debit-card claims.
- Move investments to cash at the source if required before transfer.
- Track contribution totals YTD so you do not exceed IRS limits across custodians.
- Save confirmation PDFs; mismatches show up at tax time.
Red flags
- “Free HSA” that hides card fees, paper statement fees, or $25+ transfer-out fees
- Only high-fee proprietary funds with no broad index option
- Pressure to buy insurance add-ons or “HSA optimization” coaching that is really a high-fee wrap
- Advice to take a taxable distribution “just for a week” instead of a proper transfer
Checklist
- Write your cash-floor need and surplus available to invest.
- List fees, investment minimums, and ERs at your current custodian.
- Compare at least one retail option (Fidelity, Lively, or similar) on the same grid.
- Confirm whether payroll can follow a custodian change.
- Prefer trustee-to-trustee transfer; never treat a distribution casually.
- Re-read contribution limits after any mid-year custodian switch.
Educational only. Not tax, investment, or medical advice. Fee schedules and menus change; verify current custodian disclosures, your plan SPD, and IRS Publication 969.