Using Health Accounts as Wealth-Building Tools

Health savings accounts, flexible spending accounts, and health reimbursement arrangements are primarily associated with covering out-of-pocket medical costs — but the structural tax advantages embedded in these accounts make them effective long-term wealth-building instruments when used strategically. This page examines the mechanisms by which tax-advantaged health accounts accumulate and compound value, the scenarios in which they outperform conventional investment vehicles, and the decision boundaries that determine whether a wealth-building strategy is appropriate for a given account type. The regulatory context for health savings shapes which strategies are permissible and under what conditions.

Definition and scope

Using a health account as a wealth-building tool means deploying the account's tax-shelter properties not only for immediate expense reimbursement but also for long-term asset accumulation — deferring withdrawals, investing contributed funds, and allowing balances to compound over time.

This strategy applies almost exclusively to the Health Savings Account (HSA), which is the only health account type that combines three distinct tax advantages: pre-tax contributions, tax-free investment growth, and tax-free withdrawals for qualified medical expenses. The Internal Revenue Service codifies HSA rules under 26 U.S.C. § 223. Flexible Spending Accounts (FSAs) are constrained by the use-it-or-lose-it rule and annual contribution caps — $3,300 for health care FSAs in 2025 (IRS Revenue Procedure 2024-40) — which eliminates meaningful long-term accumulation. Health Reimbursement Arrangements (HRAs) are employer-owned and do not transfer to the employee at departure, limiting their use as personal wealth vehicles.

The HSA's wealth-building potential is anchored to its rollover structure: unlike FSAs, unused HSA balances carry forward indefinitely. This permanence transforms the account from an annual spend-down bucket into a durable investment account with a healthcare-specific tax wrapper. The National Health Savings Authority home page provides orientation to the full ecosystem of account types and their respective regulatory frameworks.

How it works

The wealth-building mechanism within an HSA operates through four sequential phases:

  1. Contribution at pre-tax rates. Contributions reduce federal taxable income dollar-for-dollar. For 2025, the IRS set the HSA contribution limit at $4,300 for self-only coverage and $8,550 for family coverage, with a $1,000 catch-up allowance for individuals aged 55 and older (IRS Rev. Proc. 2024-25). Employer contributions count toward these ceilings.

  2. Investment of accumulated balances. Once a balance exceeds a custodian-established cash threshold — commonly $1,000 — the account holder can direct funds into mutual funds, index funds, or other investment vehicles. Growth within the account is not subject to federal income tax or capital gains tax.

  3. Receipt preservation rather than reimbursement. Individuals who pay qualified medical expenses out-of-pocket and retain documentation can claim HSA reimbursement at any future date. The IRS does not impose a deadline for reimbursing past expenses, provided the expenses were incurred after the HSA was established. This "receipt banking" technique allows invested funds to compound without interruption.

  4. Withdrawal at retirement age. After age 65, HSA withdrawals for non-medical purposes are treated identically to Traditional IRA distributions — subject to ordinary income tax but free from the 20 percent penalty that applies to non-qualified withdrawals before age 65 (IRS Publication 969). Withdrawals for qualified medical expenses remain tax-free at any age.

The compound effect of these phases is significant. A 35-year-old who contributes the maximum family amount annually, invests in a diversified index portfolio averaging 7 percent annual growth, and avoids withdrawals until age 65 would accumulate a balance exceeding $850,000 — none of which is subject to federal tax if applied to qualified medical expenses in retirement, a period when healthcare costs represent a substantial portion of household budgets.

Common scenarios

Scenario 1: The long-horizon accumulator. A high-income earner enrolled in a High Deductible Health Plan (HDHP) maxes annual HSA contributions, pays all current medical costs from a separate checking account, and invests the entire HSA balance. At retirement, the account functions as a dedicated healthcare endowment. This is the scenario most aligned with the triple-tax advantage described in detail at HSA Triple Tax Advantage Explained.

Scenario 2: The receipt banker. An individual accumulates years of unreimbursed, documented medical expenses — orthodontics, physical therapy, prescription costs — and holds them as a future claim. When liquidity is needed in retirement, the accumulated receipts justify a tax-free lump withdrawal that equals the total of past out-of-pocket spending. The IRS requires only that the expense was qualified and incurred after HSA establishment, not that it be claimed in the same year.

Scenario 3: The Medicare bridge. Upon Medicare enrollment at age 65, HSA contributions must cease because Medicare enrollment makes an individual ineligible to contribute (IRS Publication 969). However, the existing balance continues to grow and can reimburse Medicare Part B premiums, Medicare Advantage premiums, and out-of-pocket costs — expenses explicitly listed as qualified by the IRS. This makes a well-funded HSA a direct subsidy for Medicare coverage costs, which the Medicare Trustees Report projects will increase faster than general inflation through 2030.

Scenario 4: The employer-match maximizer. Employers who contribute to employee HSAs are effectively providing additional compensation sheltered from payroll taxes under 26 U.S.C. § 3121. Capturing the full employer match before directing additional contributions to a 401(k) increases the tax-efficiency of the total retirement savings stack.

Decision boundaries

Not every health account holder is positioned to execute a wealth-building strategy. The following structural boundaries determine feasibility:

HDHP enrollment requirement. HSA contributions require continuous enrollment in an IRS-qualified HDHP. For 2025, the minimum deductible is $1,650 for self-only and $3,300 for family coverage (IRS Rev. Proc. 2024-25). Individuals with chronic conditions generating predictable high annual costs may find the HDHP structure economically disadvantageous even when the HSA tax benefit is factored in.

Liquidity tolerance. The wealth-building approach requires paying current medical costs from non-HSA funds. Households without sufficient liquid savings to absorb deductible-level expenses cannot adopt this strategy without risk of depleting the HSA before it accumulates investment-grade balances.

FSA vs. HSA compatibility. A standard health care FSA disqualifies an individual from contributing to an HSA in the same year. A Limited-Purpose FSA — restricted to dental and vision expenses — is compatible with concurrent HSA contributions, which preserves HSA accumulation capacity. The FSA and HSA: Can You Have Both? page details the interaction rules precisely.

State tax treatment. California and New Jersey do not conform to federal HSA tax treatment — contributions are not deductible at the state level, and investment growth is subject to state income tax in those jurisdictions (California Franchise Tax Board). Residents of those states face a materially different cost-benefit calculation than residents of states with full federal conformity.

Investment menu quality. Not all HSA custodians offer low-cost index funds. Administrative fees and limited fund selection can erode the tax advantage. The wealth-building strategy is most effective when the custodian offers institutional-class funds with expense ratios below 0.20 percent, which is achievable through employer-sponsored plans using major institutional providers.

References

The law belongs to the people. Georgia v. Public.Resource.Org, 590 U.S. (2020)