Low HSA Balances Aren't an Employee Problem. They're a Plan Design Problem.

When your employees carry low HSA balances, your plan design is failing them, not the other way around. Low balances signal a deductible that's too high, a seed contribution that's missing, or both.

According to a Truemed and Devenir report, 19% of HSA accounts still carry no balance at all at mid-year. Many accounts opened during fall open enrollment go unfunded until early the following year. That's not an engagement problem. That's a design problem.

What does a low average HSA balance actually tell you?

It tells you your employees can't absorb the deductible you gave them. The EBRI data cited by SHRM is direct: employees are pulling money out of HSAs to cover short-term expenses, not saving, because rising health costs leave no room to save. When your HDHP deductible is $3,000 and your seed contribution is zero, the employee doing the math decides not to contribute at all. They're not wrong.

That same EBRI data shows this reflects broader financial stress, not individual irresponsibility. You can't decouple the HSA balance problem from the benefits cost problem.

Aon projects employees will pay an average of $5,297 out of pocket for healthcare in 2026. If your HSA has $400 in it, that number is terrifying.

The problem compounds when the balance is so low it costs more to hold than it earns. Per Devenir's 2024 HSA Research Report, a $1,000 HSA balance might accrue 50 cents or less in interest annually while the account charges up to $47 in fees. That's a net loss. You've handed your lower-wage employees a tax-advantaged account that's costing them money.

Is your HDHP deductible too high for your workforce?

Probably, if your average HSA balance is low. The deductible and the HSA don't exist separately. They're a system. When the deductible exceeds what most of your workforce can realistically hold in savings, the HDHP becomes a liability plan, not a health plan.

Check the HDHP enrollment trends article if you're seeing enrollment drop. Declining HDHP participation is often the employee telling you the same thing low balances tell you: this math doesn't work for me.

The design flaw is predictable. Employers set the deductible to hit minimum HDHP thresholds, pair it with zero or minimal seed funding, and call it a consumer-directed plan. Employees who can't absorb the deductible avoid using care or, worse, go into debt when they do. That's not cost-sharing. That's cost-shifting without a safety net.

When do employer seed contributions actually change employee behavior?

Immediately and measurably. HealthEquity research shows employers who contribute to HSAs see double-digit growth in employee participation, and the positive impact is distributed evenly across all pay grades. That last part matters. Seed contributions don't just help high earners who were already going to fund the account. They move the needle for your lowest-paid employees first.

The same research found HSA participants save 16% on average, and employers save 2% per enrollee. That's the mutual gain. It only materializes when the account has money in it from day one. A seeded account changes the employee's relationship to the plan. They're not staring at a $3,000 hole. They're starting $500 ahead.

The average employer contribution in the first half of 2025 was $679, while employees averaged $1,404 in the same period, per the Truemed and Devenir report. That employer number is too low for most mid-market plans to generate the behavioral shift you're looking for.

If your seed is under $500 per year, you're not moving behavior. You're checking a box.

Why aren't employees investing their HSA balances?

Because they're spending them. Only 18% of HSA participants were investing their balance in 2024, down slightly from the prior year, even though two-thirds of companies offer investment options, per a Plan Sponsor Council of America survey reported by CNBC. The investment feature is irrelevant if the balance never builds past the deductible.

The long-term math is stark. Fidelity estimates a single 65-year-old retiring in 2024 will spend an average of $165,000 on medical expenses through retirement, not counting long-term care. An HSA is the only account that's triple tax-advantaged for healthcare.

Most of your employees will never experience that benefit if the account gets drained every January. This isn't a financial literacy gap. It's a liquidity gap. Fix the liquidity problem first with a better seed strategy and a deductible that fits your workforce. The investing behavior follows.

What should you actually do with this information?

Pull your average HSA balance by income band. If low-wage employees are carrying near-zero balances, your HDHP is functioning as a high-deductible-only plan for them, with no savings offset. That's the finding. Build a response around it.

Consider a tiered seed strategy: higher seed contributions for lower wage bands, funded on day one of the plan year, not in quarterly installments. January funding matters because employees hit deductibles in January. A Q4 seed contribution doesn't help the employee who had a claim in February.

Also review your plan design alongside your open enrollment timeline. Deductible adjustments need to be communicated clearly before election season. The HSA seed amount needs to be prominent in your enrollment materials. Employees who don't know you're contributing won't change their behavior.

Health benefit costs are on pace to rise 6.7% in 2026, pushing average per-employee cost above $18,500, per Mercer. That number doesn't go down because you offered an HSA. It goes down because you built a plan that employees actually use well. Low balances mean you haven't gotten there yet.

Frequently asked questions

How do I know if my HDHP deductible is too high for my workforce?

Pull your average HSA balance by income quartile. If your lowest-earning employees carry near-zero balances at mid-year, the deductible almost certainly exceeds what they can realistically self-insure. Cross that against your claims data to see how many employees hit the deductible each year. If most never hit it, they're avoiding care, not staying healthy. You can use the Benefits Blueprint tool to map your current plan structure and identify where the design gaps are.

What's the right employer seed contribution amount?

There's no universal number, but $679 in the first half of 2025, the average per Truemed and Devenir, isn't moving behavior for most workforces. A practical benchmark: seed at least 25-35% of the deductible, funded on January 1. For a $2,000 deductible, that's $500-$700 up front. For lower-wage employees, consider seeding closer to 50% and structuring it as a tiered contribution by pay band.

Do HSA seed contributions actually save the employer money?

Yes, measurably. HealthEquity research shows employers save an average of 2% per HSA enrollee, and employees save 16%. That savings comes from consumer-directed behavior: employees in funded HSAs make more cost-conscious care decisions. The behavioral shift requires the account to be funded. An unfunded account produces no savings effect.

Why do employees not invest their HSA balances even when the option is available?

Liquidity. If the balance is at or below the deductible, the employee can't afford to lock money into investments they may need for the next medical bill. The Plan Sponsor Council of America found only 18% of participants invested in 2024, despite most plans offering the option. The fix is increasing the balance through better seed contributions and realistic deductible design, not financial education campaigns.

What's the connection between low HSA balances and HDHP enrollment trends?

They move together. When employees realize an HDHP with a low HSA balance means high out-of-pocket exposure with no savings buffer, they opt out at renewal. That's a plan design failure, not an employee preference problem. If you're watching HDHP enrollment slip, check average balances first. The HDHP enrollment trends article covers how to read that signal before it compounds into an adverse selection problem.