Health Savings Accounts (HSAs) and Flexible Spending Accounts (FSAs) are two of the most underutilized tools in the employee benefits toolkit. Both allow employees to set aside pre-tax dollars for qualified medical expenses — reducing their taxable income and helping them manage healthcare costs more effectively.

But they work very differently, and choosing the wrong one (or failing to offer either) can leave money on the table for both employees and employers.

What Is an HSA?

A Health Savings Account is a tax-advantaged savings account available to employees enrolled in a qualifying High-Deductible Health Plan (HDHP). The tax advantages are exceptional — often called "triple tax-free":

1. Contributions are tax-deductible — money goes in pre-tax
2. Growth is tax-free — funds can be invested and grow without being taxed
3. Withdrawals are tax-free — when used for qualified medical expenses

Key HSA Features

• Eligibility: Must be enrolled in an HDHP; cannot be enrolled in Medicare or claimed as a dependent on someone else's taxes
• 2026 contribution limits: $4,300 for individuals, $8,550 for families (plus $1,000 catch-up for those 55+)
• Rollover: Funds roll over year to year — there is no "use it or lose it" rule
• Portability: The account belongs to the employee, not the employer — it travels with them if they change jobs
• Investment options: Many HSA providers allow funds to be invested once a balance threshold is reached

HSAs are particularly powerful as a long-term savings vehicle. Employees who don't need to spend their HSA funds immediately can invest them and use the account as a supplemental retirement savings tool.

What Is an FSA?

A Flexible Spending Account is an employer-established benefit account that allows employees to set aside pre-tax dollars for qualified medical expenses. Unlike HSAs, FSAs are not tied to a specific health plan type.

Key FSA Features

• Eligibility: Available to employees regardless of health plan type (with some exceptions for HSA-compatible FSAs)
• 2026 contribution limit: $3,300 per year
• Use it or lose it: Funds generally must be used within the plan year, though employers can offer a grace period (up to 2.5 months) or a rollover of up to $660
• Employer-owned: Unlike HSAs, FSAs are employer-owned accounts — funds don't travel with the employee if they leave
• Immediate availability: The full annual election amount is available on day one of the plan year

FSAs are simpler to administer and available to a broader range of employees, making them a good option for workforces that include employees on various health plan types.

HSA vs. FSA: Side-by-Side Comparison

Feature	HSA	FSA
Health plan requirement	HDHP required	Any plan (with exceptions)
2026 contribution limit	$4,300 / $8,550	$3,300
Rollover	Full rollover	Limited or none
Portability	Yes — employee owns it	No — employer owns it
Investment options	Yes	No
Funds available immediately	No — only what's contributed	Yes — full annual amount

Which Is Right for Your Workforce?

The answer depends on your workforce and your health plan offerings.

Consider an HSA if:

• You offer or are considering a High-Deductible Health Plan
• Your employees are generally healthy and can benefit from long-term savings
• You want to offer a benefit that employees can build over time

Consider an FSA if:

• You offer a traditional PPO or HMO plan
• Your employees have predictable, recurring medical expenses
• You want to offer a simpler, more accessible savings option

Many employers offer both — pairing an HSA with their HDHP option and an FSA (or limited-purpose FSA) for employees on other plans.

The Employer Advantage

Both HSAs and FSAs reduce payroll taxes for employers as well as employees. When employees contribute pre-tax dollars, the employer saves on FICA taxes — typically 7.65% of the contributed amount. For a workforce of 100 employees each contributing $2,000 per year, that's roughly $15,300 in annual employer tax savings.

Offering these accounts also signals to employees that you're invested in their financial wellness — not just their healthcare coverage.

Getting Started

Setting up HSA and FSA programs requires coordination with your health plan, a third-party administrator, and your payroll provider. The compliance requirements — including IRS contribution limits, eligible expense rules, and non-discrimination testing — can be complex.

Working with a benefits advisor who understands these programs can help you design a plan that maximizes value for your employees while keeping your business compliant.