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What Is a Health Savings Account and How Does It Work

A Health Savings Account, or HSA, is a type of savings account created specifically to help people pay for medical expenses. Unlike a regular savings account, an HSA has special tax advantages that can make your healthcare dollars stretch further. Money you put into an HSA is not taxed by the federal government, and when you use that money to pay for qualifying medical costs, you do not pay taxes on those withdrawals either.

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The basic structure of an HSA is straightforward. You open an account through a bank, insurance company, or financial institution that offers HSAs. You contribute money to the account, typically through payroll deductions if your employer offers one, or through direct deposits if you are self-employed. That money sits in the account until you need to use it for medical expenses. When you have a doctor's visit, prescription, dental work, or other qualifying healthcare cost, you can use your HSA funds to pay for it.

According to the U.S. Department of the Treasury, approximately 30 million Americans had HSAs as of 2023, with combined assets exceeding $60 billion. This widespread use shows that HSAs have become an important part of how many people manage healthcare costs. The average HSA account holder contributes between $2,000 and $3,000 per year, though contribution limits are set higher to accommodate different financial situations.

One unique feature of HSAs is that they are portable. If you change jobs, your HSA goes with you. The money in your account remains yours, and you can continue using it for medical expenses throughout your life. This differs from Flexible Spending Accounts, or FSAs, which are tied to your employer and typically have a "use it or lose it" rule where unused money reverts to your employer at the end of the year.

HSAs also have an investment component. Once your account reaches a certain balance—typically $1,000 to $2,500 depending on your provider—you may be able to invest the funds in stocks, bonds, or mutual funds, similar to a retirement account. This means your HSA can potentially grow over time through investment returns, in addition to your contributions.

Practical Takeaway: Understanding that an HSA is a long-term savings tool with tax advantages, not just a way to pay current medical bills, helps you make informed decisions about whether this type of account aligns with your healthcare and financial situation.

Who Can Open an HSA and Basic Requirements

Opening an HSA requires meeting several specific conditions set by federal law. The primary requirement is that you must be enrolled in what the IRS calls a "high-deductible health plan," or HDHP. This is a type of health insurance where you pay a lower monthly premium but have a higher deductible—the amount you must pay out of your own pocket before insurance kicks in. For 2024, the IRS defines a high-deductible plan as one with a deductible of at least $1,600 for individual coverage or $3,200 for family coverage.

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You also cannot be enrolled in any other health coverage besides your HDHP. This means you cannot have both an HDHP and a traditional health insurance plan at the same time. However, there are exceptions. You can have HDHP coverage and also be covered by certain types of plans, such as dental insurance, vision insurance, workers' compensation, or military healthcare. Spouses can each have their own HSA if they are both enrolled in qualifying high-deductible plans.

Age and citizenship matter as well. You must be a U.S. citizen or resident alien to open an HSA. There is no minimum age requirement, though you generally must be old enough to have your own health insurance. Additionally, you cannot be claimed as a dependent on someone else's tax return. This is why teenagers working part-time who are claimed as dependents by their parents typically cannot open their own HSA, but they may be able to once they become independent.

Medicare enrollment is another barrier. Once you enroll in Medicare—which typically happens when you turn 65—you become ineligible to contribute new money to an HSA, though you can continue to use existing HSA funds for medical expenses. This is because Medicare is considered other health coverage beyond an HDHP.

The process of opening an HSA is generally straightforward. You contact a bank, insurance company, or investment firm that offers HSA accounts and complete an application. You will need to provide proof that you are enrolled in an HDHP. This usually means providing a copy of your health insurance plan documents or a letter from your health insurance company confirming your coverage is high-deductible. Most HSA providers can verify this information directly with your insurance company.

Practical Takeaway: Before opening an HSA, confirm that your current health insurance plan meets the HDHP requirements and that you do not have other conflicting coverage, as these are the foundation of HSA eligibility.

Contribution Limits and How Much You Can Save

The IRS sets annual contribution limits for HSAs, and these limits increase most years to keep pace with inflation. For 2024, the maximum contribution limit is $4,150 for individual coverage and $8,300 for family coverage. These limits apply to the total amount you and your employer combined can contribute in a single year. Understanding these limits helps you plan your savings strategy.

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If you are 55 or older, you can contribute an additional $1,000 per year, called a "catch-up contribution." This provision recognizes that people closer to retirement may want to save more for healthcare costs they might face in later years. So someone aged 55 or older with individual coverage could contribute up to $5,150 in 2024. This catch-up opportunity continues until you enroll in Medicare.

Contributions can come from different sources. If your employer offers an HSA, they may contribute on your behalf, typically through a deduction from your paycheck. Self-employed individuals and those whose employers do not offer HSAs can make contributions directly to their HSA accounts. You have until the tax filing deadline—usually April 15 of the following year—to make contributions for the previous year.

One important rule is that you cannot exceed the annual limit across all HSA accounts. If you have multiple HSAs, your total contributions across all accounts cannot exceed the limit. For example, if you open an HSA at two different banks, your combined contributions cannot exceed $4,150 for the year.

The growth potential of HSAs makes them particularly valuable for long-term savings. If you contribute the maximum amount each year, invest the funds wisely, and do not withdraw the money, the account can grow substantially. Someone who contributes $4,150 annually for 30 years, with an average annual return of 6 percent, could accumulate over $500,000 in their HSA. This is why some financial planners recommend HSAs as a retirement savings tool, especially for people who can afford to pay current medical expenses out of pocket and let their HSA grow.

It is important to note that unused contributions do not disappear. Unlike FSAs, there is no "use it or lose it" rule with HSAs. Money in your account rolls over year to year indefinitely. This means you can accumulate funds over time, which provides flexibility to pay for healthcare expenses whenever they occur.

Practical Takeaway: Calculate your expected healthcare costs and consider whether contributing the maximum allowed amount makes sense for your situation, keeping in mind that unused contributions stay in your account for future use.

What Medical Expenses Can Be Paid With HSA Funds

HSAs can be used to pay for a wide range of medical expenses. The IRS provides a detailed list of what qualifies, and understanding this list helps you make the most of your HSA. Routine medical visits, including doctor's appointments, specialist consultations, and preventive care visits, may be paid with HSA funds. Prescription medications are also covered, as are over-the-counter medications like pain relievers, cold medicine, and allergy medications if prescribed by a doctor.

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Dental and vision expenses are included. This means you can use HSA funds to pay for dental cleanings, fillings, root canals, and orthodontics. Vision expenses like eye exams, glasses, contact lenses, and eye surgery are also covered. Mental health treatment and counseling are qualifying expenses, as are treatments for substance abuse. Hospital stays, surgical procedures, and imaging tests like X-rays and MRIs all may be paid with HSA