Health Spending Account Tax Savings: How the Math Works

Current as of October 2026. Government programs, tax rules and prices change. Check the official sources listed at the end of this page before making a decision, and confirm details with a licensed advisor.

Why the tax treatment matters

Think about the last time someone on your team paid for new glasses, a dental crown or a few physiotherapy visits. If they paid with their own money, those were after-tax dollars: income that had already been taxed before it reached their bank account.

A health spending account (HSA) changes that. As of October 2026, the Canada Revenue Agency (CRA) says that when an employer contributes to a plan that meets all the conditions of a private health services plan (PHSP), the amounts paid are not a taxable benefit to the employee. Payments made to employees under a qualifying PHSP are also not taxable. In plain terms, a dollar the employer puts into a properly structured HSA can arrive as a full dollar of coverage.

What makes an HSA qualify for tax-free treatment

The tax advantage depends on the plan meeting all of CRA's PHSP conditions. As of October 2026, CRA lists these requirements:

• All expenses covered are medical and hospital expenses, expenses connected to them, or a combination of the two.
• All or substantially all (90% or more) of the premiums paid relate to medical expenses that are eligible for the medical expense tax credit.
• The plan is in the nature of insurance: an undertaking by one person to indemnify another, for an agreed consideration, against a loss from an uncertain event.
• Coverage is limited to the employee, their spouse or common-law partner, and members of their household connected to them by blood, marriage or adoption.

An illustrative example (hypothetical numbers)

This example is hypothetical and simplified. It is not tax advice and does not reflect any real person or business. Real results depend on income, province, plan fees and the specific plan design.

Say an Ontario employer wants to help an employee who expects about $1,000 of eligible expenses this year: a dental crown and a new pair of glasses. To keep the math simple, assume the employee's combined federal and Ontario marginal income tax rate is about 30%. (As of October 2026, CRA lists 2026 rates of 20.5% federally and 9.15% in Ontario for each government's second income bracket, which add up to just under 30% before any Ontario surtax or health premium, so actual combined rates vary.)

Option 1: a $1,000 raise. Under the 30% assumption, about $300 goes to income tax, leaving roughly $700 before the employee's own CPP and EI deductions. That leaves the employee short of the $1,000 bill. The employer also pays its share of payroll costs on that salary: CRA states that employers match the employee's CPP contribution and pay 1.4 times the employee's EI premium.

Option 2: $1,000 in an HSA. If the plan qualifies as a PHSP, the employee can be reimbursed up to the full $1,000 of eligible expenses without it being added to their taxable income. The employer pays the plan's administration fee and any applicable sales tax instead of extra payroll costs on salary.

To try your own numbers, use the HSA tax savings calculator. For a broader look at the trade-off, see employee benefits vs. a pay raise.

The employer side: deductions, EHT and fees

Employer HSA contributions are generally treated as a business expense, but the rules differ for corporations and unincorporated businesses. As of October 2026, CRA allows self-employed individuals to deduct PHSP premiums only when they are actively engaged in the business on a regular and continuous basis, meet an income test, and have coverage through an insurance company, trust company, PHSP administrator or another organization CRA lists.

In Ontario, the Employer Health Tax (EHT) is calculated on remuneration. As of October 2026, the Ontario government lists benefits from employer contributions to private health services plans (such as medical and dental) among items not included as remuneration for EHT, whereas extra salary counts as remuneration.

HSAs are not free to run. Administrators charge fees, and as of October 2026 Ontario applies 8% retail sales tax (RST) to group insurance premiums, certain contributions to funded benefits plans and certain payments under unfunded benefits plans. An advisor can explain how fees and taxes apply to a particular HSA, which is part of comparing it fairly against traditional group insurance.

How this compares to claiming the medical expense tax credit

Employees who pay out of pocket may be able to claim the medical expense tax credit, but it only applies to expenses above a threshold. For the 2025 tax year, CRA set that threshold at the lesser of 3% of net income or $2,834; the dollar figure is indexed, so check the current amount. The credit is non-refundable and is calculated at the lowest federal tax rate, not the employee's marginal rate.

Expenses reimbursed by an HSA generally cannot also be claimed for the credit. CRA notes that you can only claim the part of an expense that has not been and will not be reimbursed, unless the reimbursement was included in income. So the HSA and the credit are usually an either-or for any single expense, and an advisor or accountant can help you see which route leaves your team further ahead.

Owner-managers and other limits to know

Business owners often ask whether they can run their own family's dental and prescription costs through an HSA. It can be possible, but the benefit generally needs to be received as an employee rather than as a shareholder, and the coverage should be reasonable compared with what arm's-length employees receive. Plans covering only a single shareholder-employee can raise questions about whether the insurance element exists. Read more on benefits for owner-operated businesses, and confirm your situation with an accountant.

Two other limits are worth keeping in mind. First, only CRA-eligible medical expenses qualify; see what a health spending account can cover. Second, Quebec has its own rules for provincial income tax, so employers with staff there should get Quebec-specific guidance.

Is an HSA the right fit for your team?

HSAs tend to appeal to employers who want predictable costs and to employees who value choice: one person spends on orthodontics, another on massage therapy, another on a pair of prescription sunglasses. Some employers pair an HSA with a basic insured plan to protect against large, unexpected drug or hospital costs.

If you want help working out whether an HSA, a traditional plan or a combination makes sense, get matched with a licensed benefits advisor who can walk through the numbers for your business.

Common questions

Are health spending account reimbursements taxable to employees?

As of October 2026, CRA says payments made under a plan that meets all the conditions of a private health services plan are not a taxable benefit. If the plan does not meet those conditions, different tax treatment can apply.

Can an employee claim the medical expense tax credit for HSA-reimbursed costs?

Generally no. CRA allows the credit only for the portion of an expense that has not been and will not be reimbursed, unless the reimbursement was included in the person's income.

Does an HSA reduce Ontario Employer Health Tax?

As of October 2026, Ontario lists benefits from employer contributions to private health services plans among items not included as remuneration for EHT, while salary is remuneration. Whether your business pays EHT at all depends on your payroll and exemption, so check the current rules.

How much tax can a health spending account save?

It depends on the employee's marginal tax rate, the plan's fees and sales tax, and the employer's payroll costs. The HSA tax savings calculator can give a rough illustration, and an advisor or accountant can model your actual situation.

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