House hacking in Canada — and the math most calculators get wrong
A house hack is a property you live in that also pays for itself. You buy a duplex or triplex, occupy one unit, and rent the others — or you rent out spare bedrooms in a single-family home. Your tenants' rent offsets the mortgage and operating costs, so the real question isn't “what's my return?” but “what do I actually pay each month to live here?” That's your mortgage plus operating expenses, minus tenant rent. At or below zero, you live for free.
The down payment rule is the whole advantage. In Canada, a pure investment property requires a minimum 20% down and cannot be CMHC-insured. An owner-occupied purchase requires a minimum 5% down, with CMHC insurance available to support it. Living in one unit is what moves you from the first rule to the second — the same building and the same rent roll, reachable with a quarter of the cash. In a country where high prices are the main barrier to owning a rental at all, that distinction does more work than any other lever available to a first-time investor.
Your unit isn't a rental — so don't treat it like one. This is where popular calculators quietly distort the numbers. Your own unit produces no rent, so it must be excluded from income entirely. And it must not have a vacancy allowance applied to it: vacancy is a haircut on rent you expected to collect, and you were never collecting rent from yourself. Counting phantom rent on your unit inflates income; applying vacancy to it invents a loss on income that never existed. This calculator counts rent only from the units you let out, and applies vacancy only to those units.
What happens when you move out. Once you leave, every unit can be rented — gross rent jumps and the property becomes a conventional rental, with vacancy now correctly applied across all units. You keep the low-down owner-occupied mortgage you originally qualified for, which is why the strategy compounds. This calculator shows that fully-rented scenario beside your live-in numbers. From there, run the deal through the cash-on-cash return calculator or the rental property ROI calculator to see how it stands on its own.
The honest downsides. You live next to your tenants — shared walls, shared laundry, and you are the person they call when a pipe goes at 11pm. This is not passive income; it's a job with a discount attached. Owner-occupancy financing also typically requires you to live in the property for around a year before moving out, so read your loan terms rather than assuming you can leave at will. Small multifamily inventory is thin in most Canadian markets and provincial tenancy rules govern how you handle rent increases and evictions. And low-down leverage cuts both ways: with little equity, a non-paying tenant hits your own housing budget directly.
CMHC's own eligibility page for homeowner mortgage loan insurance sets the down payment rule a house hack depends on: 5% of the purchase price on homes at or under C$500,000, then 5% on the first C$500,000 plus 10% on the remaining portion, with total purchase price capped below C$1,500,000, plus GDS/TDS ceilings of 39%/44% of gross household income. What CMHC's published general-requirements page does NOT state, in the text this registry could verify, is a specific maximum unit count for an owner-occupied insured purchase — confirm directly with your lender or CMHC before assuming a duplex, triplex, or fourplex definitely qualifies under these terms.
What CMHC's eligibility page actually states
The down payment rule that makes house hacking work is published directly on CMHC's general requirements page: minimum down payment is 5% of the purchase price for homes at or under C$500,000; for homes over C$500,000, it's 5% on the first C$500,000 plus 10% on the remaining portion up to the price cap. Total purchase price must be below C$1,500,000. The page also states household affordability limits directly: GDS (gross debt service) should not exceed 39% of gross household income, and TDS (total debt service) should not exceed 44%.
What this page's captured text does not state is a maximum number of units for an owner-occupied insured purchase. If you're evaluating a duplex, triplex, or fourplex specifically, that unit-count eligibility detail needs to be confirmed with your lender or CMHC directly — this registry could not verify a specific unit-count rule from CMHC's own published text, and this page does not assert one.
House hacking a condo: the fee rule that changes your math
If the house hack is a condo where you rent out a room or a legal secondary unit, one specific CMHC rule affects how the mortgage is qualified: for CMHC-insured mortgages, 50% of monthly condominium fees must be included in both the GDS and TDS calculations (100% of site or ground rent applies instead for leasehold or chattel properties). That's a cost your DIY affordability math might not include if you're only budgeting the condo fee as a straight operating expense — it also directly affects your debt-service ratios, which affects how much you can qualify to borrow in the first place.
Methodology
Down payment tiers, price cap, and GDS/TDS figures are reproduced exactly as stated on CMHC's own general-requirements page. Premium percentages by LTV tier and the 30-year amortization surcharge are reproduced exactly as published on CMHC's mortgage loan insurance cost page and its 2024 premium-revision notice. The worked example applies CMHC's own published premium rate to a stated loan scenario as arithmetic, not an estimate.
Sources
- CMHC — General requirements to qualify for homeowner mortgage loan insurance — accessed 2026-09-21
- CMHC — CMHC mortgage loan insurance cost — accessed 2026-09-21
- CMHC — CMHC revises homeowner mortgage loan insurance premiums (media notice) — accessed 2026-09-21
- CMHC — Calculating GDS and TDS — accessed 2026-09-21
- CMHC — Premium information for homeowner and small rental loans — accessed 2026-09-21
Why living in one unit changes the whole deal in Canada
| Factor | Owner-occupied | Pure investment |
|---|---|---|
| Minimum down payment | 5% | 20% |
| CMHC insurance | Available | Not available |
| Rent counted as income | Rented units only | All units |
| Vacancy applies to | Rented units only | All units |
Occupying one unit moves you from the 20% investment rule to the 5% owner-occupied rule on the same building.
Frequently asked questions
What is house hacking?
House hacking means buying a property you live in and renting out the rest of it — the other units of a duplex, triplex, or fourplex, or spare bedrooms in a single-family home. Your tenants' rent offsets your mortgage and operating costs, reducing what you pay each month to live there. When the rent covers everything, you live for free; when it more than covers it, the property pays you.
Why does the owner-occupied down payment matter so much?
It is the whole advantage. A pure investment property generally requires a large down payment — and no low-down insured option. Because you live in a house hack, you qualify for owner-occupied financing instead, which allows a far smaller down payment and typically better rate pricing. You control the same building for a fraction of the cash, which is why house hacking is a common entry point into rental property.
Should vacancy be applied to the unit I live in?
No — and this is the single most common error in house-hack math. Your own unit produces no rent, so it contributes nothing to income. It also cannot suffer a vacancy loss, because you were never collecting rent on it in the first place. Applying a vacancy allowance to your own unit invents a phantom loss on phantom income. This calculator counts rent only from the units you actually let out, and applies vacancy only to those units.
What happens when I move out?
Once you leave, every unit can be rented, so the property becomes a conventional rental: all units produce income, and the vacancy allowance now applies to all of them. That usually raises gross rent substantially. This calculator shows that scenario alongside your live-in numbers, so you can see whether the property still cash-flows after you're gone — which matters, since you keep the low-down owner-occupied loan you originally qualified for.
What are the downsides of house hacking?
You live next to your tenants, which means noise, shared spaces, and being the person they call when something breaks — it is not passive income. Owner-occupancy loan programs also typically require you to live in the property for around a year before you move out, so check your specific loan terms. Small multifamily properties can be harder to find and finance than single-family homes, and if a tenant stops paying, the shortfall lands directly on your own housing budget.
How does house hacking work in Canada?
Canadian owner-occupied purchases allow a minimum 5% down, and CMHC mortgage insurance is available to support that low down payment. A pure investment property, by contrast, requires at least 20% down and cannot be CMHC-insured. Living in one unit of a duplex or triplex is what moves you from the 20% rule into the 5% owner-occupied rule — the largest single lever available to a first-time Canadian investor.