How to Top Up a Group Benefits Plan With an HSA

Quick answer

Keep the policy and add an HSA with a per-employee limit. Staff claim from the insurer first, then the eligible remainder from the HSA. It suits a plan with low paramedical, dental or vision caps. Frontier, for incorporated businesses outside Quebec, charges 8% of approved claims plus applicable taxes and nothing else; the carrier's HCSA suits those wanting one bill.

This guide is published by Frontier HSA. We checked the linked provider pages on November 9, 2026. Amounts are Canadian dollars before applicable taxes unless stated otherwise.

What a top-up HSA does

A company that keeps its group insurance plan usually keeps it because the policy does things an HSA cannot: it pools drug costs, and it carries life and disability cover. The complaints come from the edges of the policy. The massage cap runs out in March, for example. Dental pays 80% and staff pay the rest. The vision allowance buys half a pair of glasses.

A top-up HSA leaves the policy where it is and adds a second plan behind it. The policy stays the first payer. The HSA is a separate Private Health Services Plan with its own limit per employee, and it reimburses the eligible amount the policy leaves unpaid. One rule holds the whole arrangement together: no part of a bill is reimbursed twice. Our HSA versus group insurance comparison covers the two plans side by side; this post is about running them together.

The gaps it closes

The HSA follows the CRA's medical expense rules, not the policy's benefit schedule, so it can reach anything eligible the policy stops short of. The common ones:

Paramedical caps. Policies set an annual maximum per practitioner, for example $500 for massage therapy and $500 for physiotherapy. Once an employee passes it, the HSA pays the rest of each eligible visit up to the employee's limit, subject to the CRA's practitioner rules for the province.
Dental coinsurance and maximums. A policy that pays 80% of basic dental leaves 20% with the employee, and an annual dental maximum leaves anything above it. Both are eligible for the HSA.
Orthodontics. A policy may exclude orthodontic work or cover it at a low lifetime maximum. Braces for a dependant are the kind of bill a top-up limit gets built around.
Vision. A $200 allowance every two years may not cover prescription glasses or contacts. The HSA pays the difference.
The employee share of premiums. Where employees pay part of the group health and dental premium through payroll, and that share is not reported as a taxable benefit on their T4, it is an eligible expense under premiums paid to private health services plans. Only the health and dental portion counts; life, disability and trip-cancellation cover are not medical, so ask the insurer for the premium breakdown and confirm with your accountant.
Eligible items the policy excludes. Psychotherapy with a practitioner the policy does not recognize, hearing aids, fertility treatment, medical devices. If it meets the CRA's medical expense rules, the HSA can pay it.

Every HSA payment stops at the employee's remaining limit for the plan year. In Frontier, dependants claim against the employee's limit, not a limit of their own.

What it does not do

An HSA is not insurance. It pools nothing, has no stop-loss and provides no life, disability or travel cover, and an employee facing a $10,000 drug bill above the policy's maximum gets, at most, the HSA limit. The company pays every approved claim up to the limit plus the administration fee, so the HSA's cost rises with use. That is why the policy stays: it carries the risks a per-employee allowance cannot.

How a claim is coordinated

With Frontier the order is insurer first, HSA second, and most group policies expect the same; check the policy's own coordination wording.

The employee pays the provider and claims from the group policy as usual.
The insurer pays its share and issues an explanation of benefits showing what it covered and what it did not.
The employee submits the receipt to the HSA for the eligible amount left unpaid. In Frontier the claim form asks for the amount to claim and, when it reads a receipt total, says to enter less if insurance paid part of the receipt. If a claim is audited, the explanation of benefits is one of the documents we can ask for.
After approval, Frontier invoices the corporation for the claim, the 8% fee and applicable taxes. With automatic bank payments, which are set up once with two small deposits, the employee is paid as soon as the debit starts. With manual invoices, the employee is paid once the invoice is paid.

Our how it works page walks through the steps.

How to size the limit

Three rules from our small business HSA guide apply here. Classes rest on documented employment criteria, such as full-time and part-time or management and staff, never on the person. Everyone in a class gets the same limit. And an unused limit is not a bill: the company pays only approved claims, so a round number like $500 or $750 per employee costs nothing extra if staff do not use it. In Frontier, limit increases apply right away, and decreases wait for the next plan year once the plan year has started, so set the first year's limit with a little room rather than a lot.

What the year costs

Here is an illustration for a 20-person incorporated company in Alberta that keeps its group policy and adds a $750 top-up limit per employee. Total limits are $15,000. The figures below sit on top of the premiums the company already pays. GST applies to the administration fee only.

Year's use	Approved claims	Frontier fee (8%)	GST	The company pays
Half the limits used	$7,500	$600	$30	$8,130
Every employee uses the full limit	$15,000	$1,200	$60	$16,260
Nobody claims	$0	$0	$0	$0

The company deducts the claims and the fee as a business expense. Ontario companies also see Retail Sales Tax and the premium fee on the invoice; our guide to HSA invoice taxes shows the lines by province. The claims themselves are the same under any provider; what differs is the fee and the funding terms.

Standalone HSA or the carrier's HCSA

Many carriers offer a Health Care Spending Account inside the benefits package. Canada Life, for example, describes an HCSA that reimburses eligible expenses left unpaid by other coverage, within the employer's allowance. The appeal is one bill, one portal and one renewal. The questions to ask are its administration fee, whether the allowance must be prefunded, and what happens to unused amounts, because the public pages do not give a fee schedule.

A standalone HSA means a second provider, but it stays if you change carriers, and some pay-per-claim providers carry no fixed fee. Published administration fees, before tax, checked November 9, 2026, on $7,500 of claims for 20 members:

Frontier HSA: 8% of approved claims, no setup, annual or per-member fee. $600.
Coastal HSA: 7% plus a one-time $50 setup fee. $575 in year one, $525 a year after that. Coastal collects the claim, fee and tax by pre-authorized debit.
Olympia Group HSA: 8% plus a $335 setup fee, a $99 annual fee and $40 per member added. For 20 members, $1,834 in year one, then $699 a year if no members are added.
EasyHSA: 10%, no setup or annual fee. $750.
Wellbytes Pay-As-You-Use: 10%, no setup fee. $750.
Kibono, Quikcard, myHSA and the carrier HCSAs price per claim, "typically" 12%, or by quote; see our provider comparison for the details and sources.

Said plainly: at this volume Coastal is cheaper than Frontier on administration fee, by $25 in year one and $75 a year after that. Frontier's case is no fixed fee beside the premiums you already pay, $0 in a quiet year, and no per-member line as staff come and go.

Setting it up next to the policy

Tell the carrier and your advisor. Ask whether the policy has a coordination clause and whether the HCSA they offer is inside the package or separately administered. Neither answer stops you; both change the paperwork.
Write the order into the benefits summary. Insurance first, HSA for the eligible remainder, explanation of benefits kept. Staff will follow the order if it is on the same page as the policy's limits.
Pick one or two classes, a round limit and a plan admin, then invite staff. Each employee submits their own receipts from their phone. There is no payroll entry, no deposit and no contract, and leavers are removed with no per-member fee.

Where this is the wrong move

A top-up HSA is the right shape only if the policy is worth keeping. If the premiums are the problem and the insured protection is thin, compare the alternatives to group insurance before adding a second plan on top of a policy you resent.

It is not available to every business. Frontier serves incorporated businesses outside Quebec only, so a sole proprietorship or partnership needs another route, and a Quebec company should know that Quebec treats reimbursements as a taxable benefit provincially. Check eligibility before you set limits.

Keep the policy for the insured risks and add a pay-per-claim HSA with a modest limit sized to the gaps staff actually hit, the same limit within each class, dependants included, automatic payments on. For an incorporated business outside Quebec, Frontier charges 8% of approved claims plus applicable taxes, and no other fee; on the 20-person example above that is $600 on $7,500 of claims and $0 in a quiet year. If claims are steady, compare Coastal's lower percentage. If you want one carrier for everything, ask for the HCSA quote and its funding terms before deciding.

FAQ

Can an HSA cover what my group plan does not?

Yes, within its limit and the CRA's medical expense rules. An HSA can reimburse the eligible amount a policy leaves unpaid: the coinsurance on dental, the part of a massage bill above the annual cap, glasses beyond the vision allowance, or an eligible item the policy excludes. It cannot pay more than the employee's remaining limit.

Do employees submit to insurance or the HSA first?

Insurance first. The employee claims from the group policy, keeps the explanation of benefits, then submits the receipt to the HSA for the eligible amount left over. The same dollar can never be reimbursed twice. Frontier requires this order and most group policies expect it, so write it into the benefits summary staff receive.

Yes, within the employee's limit, if the share is paid out of pocket and not reported as a taxable benefit on the T4. Only the health and dental portion of the premium counts; life, disability and trip-cancellation cover are not medical expenses, so the insurer's breakdown matters. Confirm with your accountant.

Does adding an HSA change the group plan's premiums?

Not directly. The HSA is a separate plan with its own cost, and the policy's premiums are set by the carrier at renewal from the policy's own experience. Tell the carrier and your advisor you are adding one so coordination is clear. An employer can use the HSA to hold policy caps steady at renewal instead of buying richer insured tiers.

Is a top-up HSA taxable to employees?

Outside Quebec, reimbursements from a plan that qualifies as a Private Health Services Plan are generally not a taxable benefit to the employee, and the employer can generally deduct the cost. Quebec treats them as a taxable benefit provincially. The plan has to be set up as a PHSP, which is why an HSA added to a policy still needs its own plan document.

How big should a top-up limit be?

Smaller than a standalone HSA limit, because the policy carries drugs and the large items. Start from the complaints: if the paramedical cap is the problem, a few hundred dollars per employee covers most of the overflow. Everyone in a class gets the same limit, and an unused limit costs nothing, so err on the side of a round number.

Can I use the insurer's HCSA instead?

Often. Many carriers offer a Health Care Spending Account inside the benefits package, which gives you one bill and one portal. Ask for its administration fee, whether it must be prefunded, and what happens to unused amounts. A standalone HSA is a second provider, and it stays if you change carriers. Frontier's has no fixed fee and no contract; other standalone providers charge setup or annual fees, so compare their schedules too.

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