HSA (Health Savings Account)
A US account type: a tax-advantaged medical savings account available to taxpayers enrolled in high-deductible health plans (HDHP), featuring triple tax advantages: tax-deductible contributions, tax-free growth, and tax-free qualified withdrawals.
Systems Engineering Analogy
A triple-advantaged tax structure: pre-tax contributions, tax-free internal compounding cycles, and tax-free distributions for qualified healthcare expenses.
Featured in: Book 10: The Tax Shield