Can I use a Health Savings Account as an investing account?

Yes — an HSA is arguably the most tax-advantaged investing account available, and most people underuse it as one. If you have a qualifying high-deductible health plan, you can contribute up to $4,300 self-only or $8,550 family in 2025 (plus $1,000 if you're 55+). Contributions are tax-deductible, growth is tax-free, and withdrawals for qualified medical expenses are tax-free too — a rare triple benefit no other account offers. The investing trick: instead of spending the HSA on current medical bills, pay those out of pocket, leave the HSA invested in index funds, and let it compound for decades. You can even reimburse yourself years later for old medical receipts. After age 65, non-medical withdrawals are taxed like a traditional IRA, so it doubles as a retirement account. Just keep enough accessible for near-term health costs.