What you need to do to offer an HSA to your employees

To offer a health savings account through your small business, you must first enroll your company in a high-deductible health plan (HDHP) with a health insurance carrier. Your employees can then open individual HSAs with a bank or financial institution of their choice — the HSA itself is separate from the health plan, though the HDHP is the legal requirement that makes the account possible.

You do not have to contribute to employee HSAs, but many small businesses do to attract and retain staff. If you choose to contribute, those contributions are tax-deductible for your business and not counted as taxable income to the employee. The process involves selecting an HDHP, communicating the plan details to employees, and providing them with the information they need to open their own accounts.

The IRS sets the rules for what qualifies as an HDHP each year — primarily the deductible amount and out-of-pocket limits. For 2024, an individual HDHP must have a deductible of at least $1,600 and an out-of-pocket maximum of no more than $3,200. These figures change annually, so you will need to verify them with your health insurance broker or the IRS website before enrollment.

Key Takeaways

  • Your business must enroll in a high-deductible health plan with a carrier before employees can open HSAs; the HSA account itself is opened separately by each employee.
  • Employer contributions to employee HSAs are tax-deductible for your business and not taxable income to the employee, making them a cost-effective benefit.
  • You choose the HDHP carrier and plan design, but employees choose their own HSA bank or custodian — these decisions are independent.
  • The IRS sets annual deductible and out-of-pocket limits that determine whether a health plan qualifies; plans that fall outside these ranges cannot support HSAs.
  • You must provide employees with written notice of the HDHP terms and HSA rules before the plan year begins, or within 90 days of enrollment if they join mid-year.

Choosing an HDHP and health insurance carrier

Start by contacting health insurance brokers or carriers that serve small businesses in your state. Most major carriers — including Aetna, Blue Cross Blue Shield, Cigna, and UnitedHealthcare — offer HDHP options. A broker can show you plans from multiple carriers and help you compare deductibles, copays, coinsurance, and premiums. The deductible is the most important number: it must meet the IRS minimum to may have access to for HSAs, but you can choose a plan with a higher deductible if you want.

When comparing plans, look at the total cost to your business: the monthly premium per employee, your contribution to employee HSAs (if you plan to offer one), and the out-of-pocket costs employees will face. A plan with a higher deductible usually has a lower premium, so the math often works out to offer a higher employer HSA contribution to offset the employee's higher deductible. For example, you might choose a plan with a $2,000 deductible and contribute $1,000 per year to each employee's HSA, reducing their net out-of-pocket risk.

Once you have selected a plan and carrier, you will enroll your business and employees during the plan's open enrollment period or when you first establish coverage. Your broker or the carrier's enrollment team will walk you through the process. You will need your business tax ID (EIN), the number of employees, and basic payroll information.

Setting up the HSA infrastructure and employee communication

After your HDHP is active, you do not automatically set up HSAs for employees — instead, you provide them with the information and tools to open accounts themselves. Many health insurance carriers partner with HSA custodians (banks or financial institutions) and will include HSA enrollment materials in the welcome packet they send to new members. Employees can also open HSAs independently with any IRS-approved custodian, such as Fidelity, HealthEquity, Lively, or their own bank.

You should send employees a written notice explaining the HDHP, the HSA rules, and the contribution limits for the year. This notice must go out before the plan year starts, or within 90 days if employees enroll mid-year. Include information about where they can open an account, what the annual contribution limits are, and whether your business will contribute to their accounts. If you plan to make employer contributions, specify the amount and how it will be deposited (usually through payroll deduction).

Decide whether you will contribute to employee HSAs and, if so, how much. Contributions can be made through payroll (the most common method) or as a lump sum at the start of the year. If you contribute through payroll, coordinate with your payroll provider to ensure the contributions are deducted from gross pay and reported correctly on W-2 forms. Contributions must be made by the tax filing deadline (usually April 15) to count toward that tax year.

Payroll and tax reporting for HSA contributions

If you contribute to employee HSAs through payroll, work with your payroll provider to set up the deduction. The contribution reduces the employee's taxable wages, so it lowers both income tax and payroll taxes (Social Security and Medicare). For example, if an employee earns $50,000 and you contribute $2,000 to their HSA, their taxable wages are $48,000.

You will report employer HSA contributions on the employee's W-2 form in Box 12 with code W. The contribution amount also appears in Box 1 (wages) but is excluded from Social Security wages (Box 3) and Medicare wages (Box 5). Your payroll provider should handle this automatically if you set up the HSA deduction correctly.

Keep records of all employer contributions for each employee, including the date, amount, and employee name. These records support your tax deduction and help resolve any discrepancies with the IRS or the employee's HSA custodian. If an employee leaves your business, their HSA remains theirs — the account does not close, and they can continue to use it even if they no longer work for you.

Compliance and annual responsibilities

Each year, verify that your HDHP still meets the IRS deductible and out-of-pocket limits. The IRS publishes updated limits in March for plans that start January 1. If your plan falls outside the limits due to premium increases or plan changes, it may no longer may have access to for HSAs, and you will need to adjust the plan or switch carriers.

You are not required to audit whether employees actually open HSAs or use them correctly — that is the employee's responsibility. However, if you make employer contributions, you should track them and ensure they are reported on W-2 forms. Some businesses use an HSA administrator or payroll provider that integrates with HSA custodians to automate contributions and reporting.

If you offer other health plans (such as a PPO or HMO) alongside the HDHP, employees who enroll in those plans cannot contribute to an HSA during that year. Make sure your enrollment materials clearly explain which plans are HSA-may be able to access and which are not. Employees can switch between plans during open enrollment and adjust their HSA contributions accordingly.

Common mistakes to avoid when setting up an HSA program

One frequent error is choosing a plan that does not meet the IRS deductible minimum. If your plan has a $1,400 deductible and the IRS minimum is $1,600, employees cannot open HSAs even if the plan is otherwise good. Always confirm the deductible amount with your carrier before enrollment.

Another mistake is assuming you must contribute to employee HSAs. You do not — offering the HDHP alone is enough. However, if you do contribute, make sure the contributions are made by the tax deadline and reported correctly on W-2 forms. Missed deadlines or incorrect reporting can trigger IRS penalties.

Some businesses also fail to communicate the HSA option clearly to employees. If employees do not know they can open an account or do not understand the rules, they may miss the opportunity to save on taxes. Provide written materials, hold a brief meeting or webinar, and make it easy for employees to ask questions.

Frequently Asked Questions

Do I have to contribute to employee HSAs, or can I just offer the HDHP?

You can offer the HDHP without making any employer contributions. Employees can still open and fund their own HSAs. However, many small businesses contribute to attract talent and help employees offset the higher deductible. Contributions are optional and the amount is up to you.

Can employees use HSAs if they are enrolled in my other health plans?

No. An employee can only contribute to an HSA if they are enrolled in an HDHP and have no other health coverage (with limited exceptions for certain plans like dental or vision). If an employee switches to a PPO or HMO mid-year, they cannot contribute to an HSA for the rest of that year, though they can continue to spend money already in the account.

What happens to an employee's HSA if they leave my business?

The HSA belongs to the employee, not your business. When they leave, the account stays open and they keep the money. They can continue to use it for may have access to medical expenses for the rest of their life. Your employer contributions stop, but any money they contributed themselves or that you contributed remains theirs.

How do I know if my HDHP qualifies for HSAs each year?

Check the deductible and out-of-pocket maximum against the IRS limits published each March. For 2024, individual coverage must have a deductible of at least $1,600 and an out-of-pocket maximum of no more than $3,200. If your plan falls outside these ranges, it no longer qualifies. Your broker or carrier can confirm whether your plan meets the requirements.

Can I change the amount I contribute to employee HSAs mid-year?

Yes, you can adjust contributions during open enrollment or if you have a may have access to life event (such as a significant change in business revenue). However, contributions must still be made by the tax deadline to count toward that tax year. Coordinate any changes with your payroll provider and notify employees in writing.