Yes. If you offer a Health Spending Account (HSA) that can reimburse dental expenses, your employees no longer qualify for the Canadian Dental Care Plan (CDCP), and you are required to say so on their T4. This is the hardest objection in the small-business benefits category, and most vendor pages answer it vaguely. The government does not.
Here is the sentence that settles it, from the CDCP eligibility page on canada.ca: "To be eligible for the CDCP, you cannot have access to private dental insurance or coverage, including health spending accounts which cover dental costs." That clause was written for exactly this situation. It is not a grey area, it is not an interpretation, and it does not turn on whether the employee ever files a dental claim.
This guide covers what CDCP eligibility requires, what the five T4 box 45 codes mean, how a Health Spending Account maps onto them, and the three honest options you have if some of your team would otherwise qualify for the CDCP. None of this is tax or legal advice — plan design and payroll reporting decisions should go past your accountant before you commit to them.
The Three Things CDCP Eligibility Requires
The CDCP eligibility page sets out the requirements plainly. All of them have to be true.
No access to private dental insurance or coverage. The excluded sources canada.ca lists are your work or pension plan, a family member's work or pension plan, a professional or student organization, and insurance or coverage purchased by you or a family member for dental costs, including purchased enhancements, supplementary or top-up insurance. The one exception is a retiree who opted out of pension dental coverage before December 11, 2023 and cannot opt back in.
Filed tax returns. The applicant and their spouse or common-law partner must have filed their Canadian tax returns for the previous year, which is how the adjusted family net income is assessed.
Adjusted family net income under $90,000. Canadian residency for tax purposes is required alongside it.
The income figure does more than gate eligibility — it sets the co-payment, the share of the CDCP established fee the member pays out of pocket.
| Adjusted family net income | CDCP covers | Member co-payment | | --- | --- | --- | | Lower than $70,000 | 100% of CDCP established fees | None | | $70,000 to $79,999 | 60% of CDCP established fees | 40% | | $80,000 to $89,999 | 40% of CDCP established fees | 60% |
Two footnotes matter when you are comparing the CDCP to an HSA. The CDCP pays at its own established fees, which are not always what a dentist charges, so a member can owe the difference on top of the co-payment. And coverage through a provincial, territorial or federal government social program does not disqualify anyone — those plans coordinate with the CDCP. Private coverage is what ends eligibility.
Access Means Access, Not Use
The most expensive misreading of the rule is assuming that an unused benefit is a non-existent benefit. Canada.ca closes that door directly: you are not eligible for the CDCP if you have any kind of dental insurance or coverage, even if you have never used it, and even if you decided not to enrol in it. In those cases, the page says, "we consider you to have access to dental insurance or coverage."
The same logic runs through the enforcement side. Members attest every year that they have no access to private dental coverage, and Service Canada verifies those attestations against tax records — the T4 and T4A slips employers file. If a member's slip shows access, they can be asked to prove they no longer have it, and a member found to have been ineligible can be removed from the plan and required to reimburse the Government of Canada for services already paid.
So this is not a rule an employer and an employee can quietly agree to ignore. The employer's T4 filing is the audit trail.
T4 Box 45, Code by Code
Box 45 is titled "Employer-offered dental benefits." The CRA's employer guidance is that for calendar year 2023 and after, it is mandatory to indicate whether the employee or any of their family members were eligible, on December 31 of that year, to access any dental care insurance, or coverage of dental services of any kind, that you offered.
Two words in that sentence do the work: eligible (not enrolled, not reimbursed) and offered (by you).
| Code | What it means | Typical trigger | | --- | --- | --- | | 1 | Not eligible to access any dental care insurance, or coverage of dental services of any kind | No dental plan, and no HSA or wallet that can reimburse dental | | 2 | Payee only | Dental coverage or a dental-capable HSA limited to the employee | | 3 | Payee, spouse and dependent children | The usual result for an HSA that follows CRA dependant rules | | 4 | Payee and their spouse | Coverage extends to a spouse but not children | | 5 | Payee and their dependent children | Coverage extends to children but not a spouse |
The CRA is unambiguous about what falls inside box 45: "This includes co-paid dental benefits, health spending accounts, and opt-in dental benefits." A Health Spending Account is named in the guidance, in the same breath as a conventional dental plan.
Four operational details from the same CRA page are worth knowing before your first January filing:
- Declining coverage changes nothing. An employer reports whether dental coverage was offered, not whether the employee used it, opted out, or refused it.
- December 31 is the test date. An employee who was no longer eligible for your dental coverage on December 31, because they had left or for any other reason, is reported with code 1.
- The 2023–2024 relief is over. Health Canada's administrative policy made box 45 optional for calendar years 2023 and 2024 only, and only where code 1 applied. For 2025 onward, code 1 has to be filled in like any other code.
- Your payroll bureau does not get a pass. Third parties who file T4 slips for clients are required to complete box 45 and to obtain the information from the client to do it accurately.
If your HSA covers the employee's spouse and dependants — the standard design, and the one CRA dependant rules support — code 3 is your answer. Our guide to dependant coverage sets out who qualifies as a dependant on a Canadian HSA.
A Decision Path You Can Follow in Five Minutes
Work down this in order. Stop at the first line that resolves.
- Can any wallet you fund reimburse a dental receipt? If no, you report code 1 and nothing below applies. If yes, continue.
- Was that true on December 31 of the tax year? Box 45 tests eligibility on that date, not on the day you set the plan up. If the wallet went live on January 3 of the following year, that year's slip is code 1.
- Who can claim against it? Employee only is code 2. Employee, spouse and dependent children is code 3. Employee and spouse is code 4. Employee and children is code 5.
- Does anyone on your team have adjusted family net income under $90,000? If nobody does, nobody was CDCP-eligible in the first place and the trade-off is theoretical. If somebody does, continue.
- Compare what the CDCP would actually have paid that household against what your allocation pays. The arithmetic is below, and it does not always run the way people assume.
Nothing in that path asks whether an employee has claimed dental. That question does not exist in the rule.
The Three Options, With the Trade-offs Named
Option 1: Offer a dental-capable HSA and accept the CDCP loss
The default. Your employees get tax-free reimbursement across the whole Medical Expense Tax Credit list — prescriptions, dental, vision, paramedical, mental health, devices — and you report code 2 through 5 on the T4. Employees under the income threshold give up a benefit they may have been using.
This is the right answer more often than the objection implies, for a reason people miss: the CDCP is dental only, and an HSA is not. An employee weighing a lost CDCP entitlement against an HSA is not comparing like with like. They are comparing dental coverage capped at CDCP established fees against a pool that also pays for a physiotherapist, a psychologist, orthotics and their child's glasses. The full list of what qualifies is long.
The honest downside: for a low-income employee with a family and heavy dental needs, the CDCP can be worth more than a modest HSA allocation. If that describes part of your team, size the allocation accordingly rather than pretending the trade does not exist.
Option 2: Configure the HSA to exclude dental
If dental cannot be reimbursed, the account is not "a health spending account which covers dental costs," and canada.ca's exclusion clause is written around that specific capability. In principle this preserves CDCP eligibility while giving employees tax-free coverage for everything else.
Three cautions, and they are real. First, this only works if the exclusion is genuine and documented in the plan terms — a plan that reimburses a dental receipt once has an access problem, not a paperwork problem. Second, you are removing the single most-claimed category from the account, so employee-perceived value drops sharply. Third, you should confirm the reporting position with your accountant before filing: you are asserting code 1 while running a health plan, and the supporting evidence is your plan document.
NuvioLife's wallets are configured category by category per plan, with eligibility checked at submission rather than in a booklet nobody reads. Whether a dental-excluded configuration is available and appropriate for your plan is a question to put to your provider directly, in writing, before you commit — ours or anyone's.
Option 3: Fund a taxable Lifestyle or Personal Spending Account instead
A Lifestyle Spending Account is a taxable benefit, not a private health services plan, and it funds gym memberships, education, travel and family care — categories the Medical Expense Tax Credit list explicitly excludes. It is not dental insurance and it is not designed to reimburse dental work.
The trade-off is tax treatment. Every dollar is added to the employee's income and reported on the T4, so a dollar of LSA is worth less in the employee's hands than a dollar of HSA. And be careful about improvised hybrids: if you configure a taxable wallet in a way that lets someone submit a dental receipt against it, you have arguably created access to coverage of dental services, whatever you named the wallet. The category list is what matters, not the label on it.
A Worked Example: A Ten-Person Shop
A Toronto agency with ten employees is deciding between doing nothing and funding a $1,200 per-employee HSA, a $12,000 maximum annual exposure. Seven of the ten households are above $90,000 in adjusted family net income and were never CDCP-eligible. Three are below it. Those three are the entire decision.
Priya, adjusted family net income $62,000, two kids. Under the CDCP her household pays no co-payment, so exams, cleanings, x-rays and a filling for four people — call it $2,400 at CDCP established fees — cost her nothing. Trading that for $1,200 of HSA credits makes her worse off on dental by roughly $1,200, even after the HSA picks up her physiotherapy.
Marc, adjusted family net income $71,000, no children. The CDCP covers 60% of established fees. On $900 of dental work it pays about $540 and he pays $360. A $1,200 HSA covers the full $900 tax-free and leaves $300 for his prescription glasses. He is ahead by a wide margin.
Sofia, adjusted family net income $84,000, single. The CDCP covers 40%, so on $600 of dental it pays $240. The HSA pays all of it and funds $600 of counselling on top. Clearly ahead.
Two of the three low-income employees gain, seven are unaffected, and one household is materially worse off. That is the shape of this decision in most small Canadian companies: the loser is the low-income employee with children and real dental needs. The employer who wants to be fair about it does not cancel the plan — they raise the allocation for family coverage, or they have a direct conversation with the one person affected before the plan year starts, not after the T4 lands.
Run your own version of this before you sign anything. You know your team's household situations better than any provider does.
What to Tell Your Employees
Say it before the plan goes live, not in February when a CDCP renewal is refused.
Tell them that the HSA covers dental, that this means the government considers them to have access to dental coverage, and that box 45 on their T4 will show a code other than 1 as a result. Tell them the rule turns on access and not use, so declining to claim will not preserve eligibility. Tell anyone currently on the CDCP to check their household's adjusted family net income and their expected dental spending against the allocation you are offering, and to raise it with you if the math does not work for them. If their spouse has dental coverage through their own employer, the CDCP was already unavailable and nothing changes.
The one thing not to say is that it will probably be fine. Employees who discover the reporting rule from a Service Canada letter draw conclusions about what else you did not mention.
FAQ
Does offering a Health Spending Account really disqualify my employees from the CDCP?
Yes, if the account can reimburse dental expenses. Canada.ca's eligibility page states that to be eligible you "cannot have access to private dental insurance or coverage, including health spending accounts which cover dental costs." The disqualification is based on access, not on whether the employee ever submits a dental claim or enrols in anything.
What code goes in T4 box 45 if I offer an HSA?
Whichever code matches who can claim against it. Code 2 covers the employee only, code 3 the employee, spouse and dependent children, code 4 the employee and spouse, and code 5 the employee and children. Most HSAs extend to spouses and dependants, which makes code 3 the common answer. Code 1 is only for employees with no access to dental coverage of any kind.
Can I set up an HSA that excludes dental so my employees keep CDCP coverage?
In principle yes, since the canada.ca exclusion is written around accounts that cover dental costs. The exclusion has to be genuine and set out in the plan document, and it strips out the most-claimed category, so employee-perceived value falls. Ask your provider in writing whether they support a dental-excluded configuration, and confirm the box 45 reporting position with your accountant before filing.
Does a Lifestyle Spending Account affect CDCP eligibility?
An LSA funds gym, education, travel and family-care expenses, is a taxable benefit rather than a private health services plan, and is not designed to reimburse dental work. Where it genuinely cannot pay a dental receipt, it is not dental coverage. Where a wallet is configured loosely enough to reimburse dental under another name, treat it as coverage and report accordingly.
My employee never uses the HSA for dental. Can they still apply for the CDCP?
No. Canada.ca is explicit that you are ineligible even if you have never used the coverage and even if you decided not to enrol. Service Canada reviews attestations against T4 and T4A records, and a member found to have been ineligible can be removed from the plan and asked to reimburse the government for services it already paid.
Do I still have to fill out box 45 if I offer no dental coverage at all?
Yes, for 2025 onward. Health Canada's administrative policy that made box 45 optional when code 1 applied covered calendar years 2023 and 2024 only. From 2025, employers filling out T4 slips report code 1 the same as any other code, and payroll bureaus filing on your behalf must obtain the information from you.
The uncomfortable version of this answer is the accurate one: a Health Spending Account that pays for dental work is dental coverage in the government's eyes, it ends CDCP eligibility for employees who had it, and you are the one who reports it. What that costs depends entirely on how many of your people were under $90,000 in adjusted family net income and how much dental their households actually use. Run those numbers first. If you are still working out how the account itself is structured, start with what an HSA is and the CRA rules that govern one, then take the plan design to your accountant.
Sources: Canadian Dental Care Plan — Do you qualify · CDCP — What services are covered · CDCP — Employers and pension plan administrators responsibilities · CRA — T4 slip: Information for employers, box 45