Insured vs Uninsured Mortgages in BC: What Changes at the 20% Down Payment Line

Quick comparison

	Insured (under 20% down)	Uninsured (20%+ down)
Down payment required	5–19.99%	20% minimum
Maximum purchase price	$1,499,999.99	No ceiling
CMHC/insurer premium	Yes — 0.60–4.00% of loan, added to balance	No premium
Typical rate vs uninsured	Often 10–25 bps lower	Slightly higher (lender takes on the risk)
Max amortization (first-time buyer)	30 years	30 years (most lenders); some go to 35
GDS / TDS caps	39% / 44% (CMHC-set)	Up to 42% / 47% at some lenders
Refinancing to 80%+ LTV later	Not allowed (insurance was for purchase only)	Allowed — can pull equity up to 80% LTV
Insured straight-switch exemption	Always available	Available since Nov 2024 (OSFI)

Scenario	Usually better path
Down payment is 5–14.99%	Insured — no choice, required by law
Sitting at exactly 20% with thin reserves	Consider 15% down + keep $32K+ in reserve (premium ~$78/mo)
Expecting to refinance for renovations within 5 years	Uninsured — insured mortgages can't be refinanced above 80% LTV
GDS/TDS qualifying is tight	Uninsured (if 20%+ available) — lender ratios can stretch slightly
Buying a $1.1M–$1.49M property	Insured is now possible (Dec 2024 rule change lifted cap to $1.5M)

The single most consequential line in Canadian residential lending is the 20% down payment threshold. Cross under it and your mortgage must be insured by CMHC, Sagen, or Canada Guaranty — and that single fact changes your rate, your qualifying limits, your amortization options, and how much premium you owe.

For most first-time buyers in the Fraser Valley, the question isn't whether you should be on the insured or uninsured side — it's whether you understand what each side costs and offers. Pick the one that fits, not the one that sounds cheaper.

What this is, in plain English

A mortgage default insurance policy protects the lender — not the borrower — if you stop making payments and the lender has to foreclose. In Canada, three insurers provide this: CMHC (a Crown corporation), Sagen, and Canada Guaranty (both private).

You — the borrower — pay the premium, but it's calculated as a percentage of the loan amount and added to the loan balance. So you don't write a cheque for it at closing; you pay it down with the rest of the mortgage over the amortization period.

The federal rules (summarized by FCAC):

• Purchase price up to $500,000 → minimum 5% down
• Purchase price $500,000 to $1,499,999.99 → 5% on the first $500K, 10% on the rest
• Purchase price $1,500,000 or more → minimum 20% down (no insurance available)

So if your down payment is under 20% and the home is under $1.5M, the mortgage must be insured. If your down payment is 20% or more, you can choose between insured (some lenders offer "insurable" or back-end insured products even at 20%+ down) or uninsured.

How it actually works for a Fraser Valley first-time buyer

The premium math, using current CMHC published rates:

Loan-to-Value (LTV)	Down payment	CMHC premium
Up to 65%	35%+ down	0.60%
65.01-75%	25-35% down	1.70%
75.01-80%	20-25% down	2.40%
80.01-85%	15-20% down	2.80%
85.01-90%	10-15% down	3.10%
90.01-95%	5-10% down	4.00%

(Non-traditional down payment sources at 90.01-95% LTV are 4.50%.)

Worked example. Couple buying a $650,000 Surrey townhouse with 10% down — $65,000 cash. Mortgage of $585,000 at 90.01% LTV. CMHC premium: 4.00% of $585,000 = $23,400.

That premium gets added to the loan, so the actual mortgage they owe is $585,000 + $23,400 = $608,400. At a 4.50% contract rate over 30 years, that's about $3,080/month — vs. about $2,961/month on the un-insured $585,000 balance. The premium adds roughly $119/month to the payment.

Now look at the alternative: same purchase, 20% down ($130,000 cash, $520,000 mortgage), no insurance. Monthly payment at 4.50% over 30 years: about $2,631.

The difference is real. The 10%-down buyer is paying $449/month more in mortgage payment than the 20%-down buyer. But they're also keeping $65,000 more in their pocket — which is a meaningful reserve buffer, an FHSA top-up, or a renovation fund.

Whether the premium is "worth it" depends on what else that $65,000 would be doing.

What changes the answer

Cash reserves after closing. The 10%-down buyer in the example walks in with $65,000 still in the bank. The 20%-down buyer walks in with $0 (assuming the same total liquid pool). For first-time buyers, the reserves usually matter more than the premium savings. We see buyers regret the cash crunch much more often than they regret the premium.

Insurable cap and 30-year amortization. The December 2024 federal reforms raised the insured cap from $1M to $1.5M and extended 30-year amortizations to all first-time buyers and all buyers of newly built homes. So a couple buying a $1.2M Langley townhouse can now go insured with 7.5% down on the portion above $500K — a structurally different option than was available a few years ago. The 30-year amortization lowers payments and raises the qualifying ceiling.

Rate differential. Insured mortgages typically come with rates 10-25 basis points lower than uninsured at the same lender. On a $585K mortgage over 5 years, a 20-bps advantage is roughly $66/month — about $4,000 over the term. Not nothing, but smaller than most buyers assume.

Qualifying ratios. Insured mortgages are bound by CMHC's 39% GDS / 44% TDS caps. Uninsured can sometimes stretch to 42% GDS / 47% TDS at strong-credit lenders. For buyers right at the qualifying ceiling, the uninsured ratios can be the difference between qualifying or not — which means saving the 20% down payment is the lever, not the insurance avoidance.

Refinancing. Insured mortgages can't be refinanced (taken out to a higher loan-to-value) above 80% LTV — the insurance was for the original purchase. Uninsured mortgages can be refinanced up to 80% LTV with most lenders. If you expect to tap equity within five years, this matters.

Stress-test eligibility for amortization extension. Insured mortgages have hard amortization caps (now 30 years for first-time buyers and new-build buyers, 25 years otherwise). Uninsured mortgages allow up to 30-year amortization regardless, at most lenders. Some uninsured lenders go to 35 years for strong-credit files — useful for buyers struggling with the qualifying math.

The 20% choice when you're sitting at the line

This comes up almost every week. A first-time buyer has saved roughly enough for 20% down, with maybe $10-$15K of reserve cash beyond it. Should they put 20% down (no premium) and walk in with thin reserves? Or put 15% down, pay the premium, and walk in with much more cash?

We almost always advise the second option for first-time buyers. Here's the math.

20% down on $650K = $130,000 cash out, $520,000 mortgage, 0% premium. 15% down on $650K = $97,500 cash out, $552,500 mortgage + ~$15,470 CMHC premium = $567,970 loan.

So 15% leaves $32,500 more cash on hand and adds $15,470 to the loan over 30 years. That $15,470, at 4.5% over 30 years, costs roughly $78/month. For roughly $78/month, the buyer keeps $32,500 in their reserve account.

The buyers we've worked with who took the lower down payment and kept the reserves have, almost universally, looked back and said it was the right call. The buyers who stretched to 20% and walked in cash-thin are the ones we hear from in month four about a special levy that broke the budget. The premium is a slow drip; an emergency without reserves is a flood.

Common mistakes we see

Stretching to 20% to "avoid CMHC fees" without doing the math. The premium is real but it's smaller per month than most buyers think. Calculate the actual monthly cost — usually $50-$150 on a typical first-time-buyer mortgage — and compare that to what the extra cash on hand would do for you.

Assuming uninsured automatically means a better rate. At many lenders the insured rate is the better rate, because the lender's risk is covered. Always check both.

Forgetting PST on the premium in some provinces. CMHC premiums are PST-payable in Quebec, Ontario, Saskatchewan, and (since 2024) some other provinces. BC currently does not charge PST on the premium. This matters if you've used a calculator built for another province.

Not knowing about back-end insurance on 20%+ down. Some banks bundle "insurable" portfolios — where they buy bulk insurance on lower-LTV mortgages — and pass on the lower rate to the borrower. You may end up with an insured mortgage at 20% down without realizing it. Ask the lender directly: "Is this mortgage insured?" The answer affects refinancing options later.

Treating the insurance premium as flushed money. The premium becomes part of the loan; you pay interest on it but you're also building equity in the home. It's not the same as renter's insurance — it's not a sunk cost. The framing matters when you're deciding whether the premium feels acceptable.

Where this fits in the bigger picture

The insured/uninsured choice intersects with down payment math, the stress test, and the broker-vs-bank decision (some monoline lenders only do insured; some bank products only do uninsured). It also drives the choice of 25 vs 30-year amortization that's central to qualifying math.

Read the affordability pillar for the full map.

Sources

• CMHC — Mortgage loan insurance cost
• Financial Consumer Agency of Canada — Minimum down payment
• Department of Finance Canada — Boldest mortgage reforms in decades
• OSFI — Minimum qualifying rate for uninsured mortgages

More in this hub

• How much house can you actually afford? (pillar)
• GDS and TDS — the debt-service ratios
• Fixed vs variable mortgages in BC
• Mortgage broker vs bank — who to call first

Want help thinking through the premium math on your specific purchase? Book a 20-minute chat with the FRIVE team — we'll walk through the trade-off honestly, no mortgage-product agenda.

Where to go next

• Down payment guide for BC first-time buyers — the 5/10/20 rule and the $1.5M insured cap explained with worked examples
• Condos for sale in Surrey, BC — how strata fees and pricing interact with the insured/uninsured threshold in practice
• Townhomes for sale in Langley, BC — Langley's townhouse benchmark and where it sits relative to the 20% line
• First-time buyer programs overview — the full set of programs that combine with your down payment structure