_1782605483653-86ykd14Q.png)
Here's a moment I see all the time. Someone gets a $120 physiotherapy bill, hands over their benefits card expecting it to be free, and walks out having paid $36 of it themselves. They're not angry, exactly — they're confused. Isn't that the whole point of having coverage?
It is. But "coverage" almost never means "the plan pays 100% of everything." Three small mechanisms — the deductible, the co-insurance, and the co-pay — quietly decide how a bill gets split between you and your plan. Once you understand them, your benefits stop being a mystery and start being a tool. Let's walk through each one slowly.
The deductible: the amount you pay before the plan kicks in
A deductible is a set amount you pay out of your own pocket each year before your plan starts contributing. Think of it as the cover charge.
Most modern group plans in Canada have small deductibles, or none at all on health and dental. Where you'll most often see one is on prescription drugs — sometimes a few dollars per prescription, sometimes a flat annual amount per person or per family.
Michelle's tip: Deductibles usually reset every benefit year — often January 1, but not always. Check when your plan year starts, because that's the day the meter goes back to zero.
Co-insurance: the percentage split
This is the one that catches people, including my physio example above.
Co-insurance is the percentage of an eligible expense your plan pays after any deductible. If your plan covers physiotherapy at 80%, then:
- The plan pays 80%
- You pay the remaining 20%
So on that $120 visit, the plan pays $96 and you pay $24. (My earlier example was 70/30 — different plan, same idea.) Co-insurance levels vary by category, and that's deliberate:
- Drugs are often covered at 80–90%
- Paramedical services (physio, massage, psychology) frequently sit at 80%
- Major dental (crowns, bridges) is commonly 50%
- Basic dental (cleanings, fillings) is often 80–100%
The percentage isn't random. Plans cover the everyday, preventive things generously and ask you to share more of the cost on the big-ticket items.
Co-pay: a small flat fee per service
A co-pay is a fixed dollar amount you pay each time you use a particular benefit — most often a couple of dollars per prescription as a dispensing-fee share. It's small by design, but it's the reason your "free" prescription sometimes costs you $2 or $4 at the till.
Putting it together with one prescription
Imagine a $100 prescription on a plan with a $10 annual drug deductible (not yet met), 80% co-insurance, and a $2 co-pay. Here's the order of operations:
| Step | Amount | Running total you pay |
|---|---|---|
| You pay the deductible first | $10 | $10 |
| Plan pays 80% of the remaining $90 | –$72 | $10 |
| You pay the other 20% of $90 | $18 | $28 |
| You pay the co-pay | $2 | $30 |
You pay $30, the plan pays $70. Same prescription next month — with the deductible already met — would cost you closer to $20.
The numbers that keep you from overpaying
Two more terms protect you from these splits adding up forever:
- A maximum is the most your plan will pay for a category in a year — for example, $500 toward massage therapy. Once you hit it, you're paying full price after that.
- An out-of-pocket maximum (less common in group plans, but worth knowing) caps the total you can be asked to pay in co-insurance in a year.
Why this matters more than it looks
None of this is meant to nickel-and-dime you. Cost-sharing is what keeps a plan affordable enough that everyone — including you — gets to have one. But knowing the mechanics changes how you use it: you'll time a big dental procedure for after your deductible is met, you'll know to spread paramedical visits so you don't blow through a maximum in March, and you'll never again be surprised at the counter.
That's the whole goal of this series — not to turn you into an insurance expert, but to make sure your plan never catches you off guard.
