Yes — an employer can offer an HSA without sponsoring health insurance. Federal law ties HSA eligibility to the employee’s coverage under a High Deductible Health Plan, not to where that coverage comes from. As long as each participating worker is enrolled in a qualifying HDHP through a spouse, a parent’s plan, the individual marketplace, or any other source, the employer can process pre-tax payroll contributions, make its own contributions, or both.
The catch worth flagging up front: skipping group insurance is a clean option for small businesses, but employers with 50 or more full-time equivalent employees face a separate ACA penalty that an HSA program does not solve.
The HDHP Coverage Requirement
An individual cannot contribute to an HSA, and neither can an employer on their behalf, unless that person is covered by an HDHP on the first day of a given month.1Office of the Law Revision Counsel. 26 USC 223 – Health Savings Accounts The plan does not have to come from the employer facilitating the HSA.
For 2026, a qualifying HDHP must meet these IRS thresholds:
- Minimum annual deductible of $1,700 for self-only coverage or $3,400 for family coverage
- Maximum out-of-pocket expenses of $8,500 for self-only or $17,000 for family (including deductibles and co-payments, but not premiums)
These figures come from the IRS revenue procedure that adjusts HSA-related amounts each year.2Internal Revenue Service. Rev. Proc. 2025-19 A plan that covers non-preventive services before the deductible is met does not qualify, and enrollment in Medicare, a general-purpose FSA, or a general-purpose HRA also disqualifies the employee from contributing. The employer is not required to verify each worker’s eligibility, but should communicate these rules clearly.
Two Ways to Fund Employee HSAs
Without a group health plan, an employer still has two contribution channels available.
Pre-Tax Payroll Deductions
An employer can route part of each paycheck into the employee’s HSA before federal income tax, Social Security, and Medicare taxes are calculated. This requires a written Section 125 cafeteria plan, the legal framework that lets employees choose between taxable cash wages and pre-tax benefits.3Office of the Law Revision Counsel. 26 USC 125 – Cafeteria Plans Employees reduce their taxable income, and the employer saves on its share of payroll taxes for those amounts.4Internal Revenue Service. FAQs for Government Entities Regarding Cafeteria Plans
Direct Employer Contributions
An employer can also deposit money directly into employees’ HSAs as a standalone benefit — say, $500 or $1,000 per year. These contributions are tax-deductible for the business and excluded from the employee’s taxable wages.5Internal Revenue Service. Publication 969 (2025), Health Savings Accounts and Other Tax-Favored Health Plans Direct contributions do not require a Section 125 plan, but when made outside one they trigger the comparability rules discussed below.
Regardless of who contributes, the HSA belongs entirely to the employee. Funds roll over year to year, the account stays with the worker after departure, and there is no vesting schedule.
The ACA Large-Employer Problem
Offering an HSA program does not satisfy the Affordable Care Act’s employer shared responsibility requirement. An applicable large employer, one that averaged at least 50 full-time equivalent employees during the prior calendar year, must offer minimum essential health coverage to at least 95 percent of its full-time workforce.6Office of the Law Revision Counsel. 26 USC 4980H – Shared Responsibility for Employers Regarding Health Coverage An HSA is a savings account, not a health plan.
A large employer that offers only HSAs faces an annual penalty for each full-time employee (minus the first 30) whenever at least one employee receives a premium tax credit through the marketplace. The base statutory penalty is $2,000 per employee, adjusted upward for inflation. For 2026, the inflation-adjusted amount is roughly $3,340 per applicable employee.
Small employers with fewer than 50 full-time equivalent employees are not subject to this mandate and can offer HSAs as a standalone benefit without penalty.
2026 Contribution Limits
The IRS caps total annual HSA contributions from all sources combined at these amounts for 2026:
- Self-only HDHP coverage: $4,400
- Family HDHP coverage: $8,750
- Catch-up contribution for account holders age 55 or older: an additional $1,000
These limits apply per person, not per account or per employer.2Internal Revenue Service. Rev. Proc. 2025-19 An employee funding an HSA through two jobs, or through payroll and a personal deposit, is responsible for staying under the combined cap.
Comparability vs. Cafeteria Plan Rules
How the employer contributes determines which fairness rules apply, and the difference matters.
Direct employer contributions made outside a cafeteria plan must be “comparable,” meaning the same dollar amount or the same percentage of the HDHP deductible for all employees in the same coverage category (self-only versus family). The analysis applies separately to each coverage tier.5Internal Revenue Service. Publication 969 (2025), Health Savings Accounts and Other Tax-Favored Health Plans Failing this test costs the employer an excise tax equal to 35 percent of the total amount contributed to all HSAs for that calendar year, not just the unequal portion.7eCFR. 26 CFR 54.4980G-1 – Failure of Employer to Make Comparable Health Savings Account Contributions
Contributions routed through a Section 125 cafeteria plan — including amounts funded by employee salary reductions — follow the cafeteria plan’s own nondiscrimination rules instead.8eCFR. 26 CFR 54.4980G-5 – HSA Comparability Rules and Cafeteria Plans and Waiver of Excise Tax For many employers, this is the simpler path because it allows varied contribution levels without triggering the 35 percent excise tax.
Payroll Setup and W-2 Reporting
An employer that plans to process HSA salary reductions must first adopt a written Section 125 cafeteria plan document. The document spells out which benefits are offered, how employees make elections, and the plan year. The employer then selects an HSA custodian or allows employees to choose their own, and configures payroll to deduct elected amounts before income and payroll taxes.
All HSA contributions that flow through the employer, whether from salary reductions or direct employer funding, must be reported on the employee’s annual Form W-2 in Box 12 using Code W.9Internal Revenue Service. 2026 General Instructions for Forms W-2 and W-3 Contributions an employee makes on their own outside payroll are not reported by the employer; the employee claims those on Form 8889.
Staying Outside ERISA
An employer-facilitated HSA can avoid classification as an employee welfare benefit plan under ERISA, but only if the employer limits its involvement. The Department of Labor has laid out where the line is.10U.S. Department of Labor. Field Assistance Bulletin No. 2006-02 To stay outside ERISA, the employer must not restrict portability of funds to another custodian, control how employees invest, describe the HSA as an employer-established welfare plan, or accept compensation from the HSA vendor (including product discounts). Employee participation must be voluntary. Meeting these conditions keeps the program clear of ERISA’s fiduciary, reporting, and disclosure obligations.
State Tax Treatment
Most states follow the federal treatment of HSAs, so contributions are deductible and earnings grow tax-free at the state level. A couple of states do not conform. Residents there owe state income tax on HSA contributions and on interest or investment gains inside the account, even though the money is sheltered from federal tax. Employers with a workforce spanning multiple states should confirm each state’s treatment before promoting the tax benefits of the program.