Health savings accounts as a retirement vehicle

Health savings accounts have a tax treatment unmatched by any other account, and the way most people use them forfeits most of the benefit.

The tax treatment

Contributions are deductible or made pre-tax through payroll. Growth is untaxed. Withdrawals for qualified medical expenses are untaxed.

No other account offers all three. Traditional accounts defer tax; Roth accounts eliminate it on the back end; the HSA does both.

Contributions made through payroll also generally avoid payroll taxes, which is an additional advantage not available on IRA contributions.

Eligibility

Contributions require enrolment in a qualifying high-deductible health plan and no other disqualifying coverage.

The plan must meet specific criteria on deductible and out-of-pocket maximum, which are adjusted annually.

Being enrolled in Medicare disqualifies further contributions, and there is a lookback provision that catches people who enrol in Medicare after their sixty-fifth birthday.

Eligibility applies to contributions only. Funds already in the account remain usable regardless of later coverage.

The strategy most holders miss

The common pattern is to contribute and immediately spend on current medical costs, which captures the deduction and forfeits the growth.

The alternative, where cash flow permits, is to contribute the maximum, pay current medical costs from other money, invest the balance, and let it compound for decades.

There is no deadline for reimbursement under current rules. Expenses incurred after the account was established can be reimbursed at any point in the future, provided receipts are kept.

Which effectively means the account can hold decades of unreimbursed expenses that can be withdrawn tax free at any time.

The requirement is record-keeping — receipts and documentation retained indefinitely, which is worth setting up systematically rather than relying on a shoebox.

What happens at sixty-five

The account becomes more flexible.

Withdrawals for non-medical purposes are no longer subject to the additional penalty, though they are taxed as ordinary income.

Which means the account functions like a traditional IRA for non-medical spending, and better than any account for medical spending.

Given that healthcare is a major retirement expense category, and that Medicare premiums are generally a qualifying expense, most holders will have ample qualifying use for the funds.

What counts as qualified

Broader than many people assume, and with some notable exclusions.

Generally included: deductibles, copayments, prescriptions, dental, vision, hearing aids, and a range of medical equipment and services.

Medicare Part B, Part D and Medicare Advantage premiums generally qualify. Medigap premiums generally do not.

Long-term care insurance premiums qualify up to age-based limits.

The specifics are set out in published guidance and are worth checking rather than assuming, since the list has changed over time.

Investing the balance

Many HSA custodians hold funds in cash by default and require a minimum balance before investment options become available.

Which means a substantial number of accounts sit in cash earning very little, which forfeits the central advantage.

Worth checking: whether your custodian offers investment options, what they cost, and whether transferring to a different custodian would improve either.

HSA funds can generally be transferred between custodians in the same way as IRAs.

The limitations

Worth stating for balance.

The high-deductible plan required for eligibility is not right for everyone. Someone with substantial ongoing medical needs may be better served by a plan with lower cost sharing, and the tax benefit does not outweigh a worse fit.

Contribution limits are modest relative to other retirement accounts.

And inheritance treatment is poor. A spouse can generally inherit an HSA and continue it; a non-spouse beneficiary generally receives it as taxable income in the year of death, with no ability to spread it.

Which argues against leaving a large HSA balance to children, and in favour of spending it down during retirement.

Setting up the receipt system

Since the deferred-reimbursement strategy depends entirely on documentation.

A dedicated folder — physical or digital — with every qualifying receipt, filed as it occurs, plus a running spreadsheet recording the date, amount, provider and nature of the expense.

Photographing receipts immediately addresses the fading of thermal paper, which is a genuine practical problem over a twenty-year horizon.

The record should be stored somewhere a spouse or executor could find, since the accumulated reimbursement entitlement is worthless to anyone who does not know it exists.

General information only, not financial, tax or medical advice. Limits and rules change annually — consult a qualified tax professional about your own situation.