Among your many to-do items before the year runs out, consider opening or expanding a Health Savings Account (HSA).

Like many health and employee benefit programs, there is a small sign-up window that is in effect right now.

What makes an HSA so desirable is that it is triple tax-free, it helps pay medical bills, and it provides an extra layer of retirement savings.

How Does a Health Savings Account (HSA) Work?

An HSA is a savings or investment account designed to help people pay qualified health care expenses. It can be opened through a bank, credit union, or other financial institution after enrolling in an eligible health insurance plan.

As for the tax advantages: contributions made by individuals are generally deductible on federal income taxes, while employer contributions can generally be excluded from taxable income. Interest and investment gains are tax-free, and withdrawals for qualified medical expenses are also tax-free.

Money can stay in your account for years, and the account is portable, meaning that it remains in your name, even if you change jobs or retire. The account belongs to the individual, not the employer.

That combination of tax savings and long-term accumulation can make an HSA especially useful for workers who can afford to pay current medical bills from other savings and leave their HSA money invested.

Who is Eligible for an HSA?

Eligibility is determined by the health insurance coverage a person has, not by income. To contribute to an HSA in 2026, an individual generally must:

• Be covered by a qualifying high-deductible health plan (HDHP) on the first day of the month.
• Have no other disqualifying health coverage.
• Not be enrolled in Medicare.
• Not be claimed as a dependent on someone else’s tax return.

A qualifying 2026 HDHP must have a deductible of at least $1,700 for individual coverage, or $3,400 for family coverage. Its annual out-of-pocket limit cannot exceed $8,500 for an individual or $17,000 for a family. These are federal minimum and maximum requirements; actual plan deductibles can be considerably higher.

When Can You Enroll in an HSA?

For people getting insurance through an employer, the opportunity to select a high-deductible plan generally comes during the employer’s annual open-enrollment period, although new employees and people experiencing certain qualifying life events may have additional opportunities.

For individual coverage through the federal Marketplace (Obamacare), open enrollment for 2027 begins November 1, 2026, and ends January 15, 2027. Enrolling by December 15 generally allows coverage to begin January 1; enrolling later, by January 15, generally means coverage begins February 1. Outside that period, consumers need a qualifying special enrollment event to change Marketplace coverage.

How Can an HSA Help with Retirement Savings?

Unlike money in a traditional flexible spending account that must be used by a certain date, HSA balances roll over indefinitely.

HSA funds can pay for a wide range of qualified expenses, including deductibles, co-payments, coinsurance, and many dental, vision, and prescription expenses. However, premiums for private health insurance plans generally cannot be paid with HSA money, with limited exceptions. And although Medicare premiums for Parts B, C, and D qualify, premiums for Medigap plans do not.

The accounts also offer an appealing retirement strategy. Someone who pays current medical bills out of pocket can preserve HSA savings and potentially invest them for future health care costs, and those withdrawals remain tax-free.

That makes an HSA something of a hybrid: a dedicated health care account today that can become a source of retirement income tomorrow.

What Are the Potential Disadvantages of an HSA?

The biggest drawback is the insurance plan required to qualify. A high deductible can mean that a person pays substantial medical bills out-of-pocket before their insurance kicks in.

Although preventive care is generally covered without a deductible, other treatment can become expensive, particularly for someone managing a chronic condition or anticipating surgery. If you have frequent health care needs, a plan with a lower deductible may save you money, even if it has higher premiums.

The tax benefits also depend on using the money correctly. Withdrawals for non-qualified expenses before age 65 generally count as taxable income and face an additional 20% penalty. After age 65, withdrawals for nonmedical purposes are subject to ordinary income tax but no longer incur the 20% penalty.

Account holders must keep good records to show that withdrawals were used for eligible expenses.

Also, an HSA’s tax advantages do not automatically compensate for a health plan with expensive premiums, an inconvenient provider network, or poor coverage for a person’s medical needs.

Finally, Medicare enrollment changes the rules. People generally cannot contribute to an HSA once they are enrolled in Medicare, although they can continue using existing HSA balances to pay for qualified expenses. Those approaching retirement need to be particularly careful about the timing of Medicare enrollment and HSA contributions.

HSA Contribution Limits and Other Rules for 2027

HSA owners can delay filing for reimbursements to let their HSA assets grow. They can claim these paybacks later, even decades later, but they must have records supporting the claims.

What expenses qualify for HSA reimbursement?  It’s a long list, including everything from Medicare premiums to contact lens solution, and from dental and vision care to home repairs to deal with a disability.

You can use HSA funds to pay for long-term care (LTC) insurance premiums, but only up to strict annual limits set by the IRS.

The contribution limits for 2027 are $4,500 for an individual and $9,000 for a family. If you are age 55 or older, you can make an additional catch-up contribution of $1,000. You do not have to deposit a set amount or contribute every month.

A spouse or qualified charity can generally receive HSA assets tax-free, although only a spouse can continue to maintain the account as an HSA.

You can invest your funds in stocks, bonds, mutual funds, and in some cases, even cryptocurrencies.

The bottom line is that HSAs offer a powerful way to save on health care today and build financial security for the future. However, don’t let the tax benefits alone drive your decision. It’s important to compare the entire health insurance package—premiums, deductibles, out-of-pocket limits, provider networks, and expected medical needs—before deciding whether an HSA is worth pursuing.