The short answer: on a $150,000 household income with no other debts, the stress test limits a 25-year mortgage to roughly $680,000 for a home you live in, using early-2026 rates. Buy a duplex and live in one unit, and CMHC lets the lender add the other unit's rent to your income, which lifts that to roughly $780,000. For a rental you won't live in, you need 20% down, and each lender decides how much of the rent counts. A broker who works with several lenders can change the answer by tens of thousands of dollars.
Most people start a property search with a number in their head and find out at pre-approval that the lender's number is lower. The gap almost always comes from three things: the stress test, the debt-service limits, and how much of the rent the lender will count. Here's how each one works, with the arithmetic shown.
Step 1: the stress test sets the rate you're tested at
Every federally regulated lender has to qualify you at the greater of your contract rate plus 2%, or 5.25%. The Bank of Canada's average rate on new uninsured 5-year fixed mortgages was 4.22% in March 2026, so a typical qualifying rate was about 6.22%. Insured mortgages were cheaper, averaging 3.96%, so their qualifying rate was about 5.96%.
That 2-point gap matters more than it looks. At 4.22% versus 6.22% over 25 years, the same monthly payment supports about 18% less mortgage. On a $600,000 budget, that's more than $100,000.
There's no carve-out for investors or for properties with strong cash flow. You qualify on your own income first.
Step 2: GDS and TDS decide how big a payment you can carry
Lenders test the qualifying payment against two ratios:
- Gross Debt Service (GDS): housing costs as a share of gross monthly income. That's the mortgage payment, property tax, heating, and half of any strata fee. CMHC caps it at 39% for insured mortgages, and many lenders use the same line.
- Total Debt Service (TDS): GDS plus every other debt payment (car loans, lines of credit, student loans, other mortgages). CMHC's cap is 44%.
Worked example: a $150,000 household income
| Home you live in | Same, with a $900/month car loan | |
|---|---|---|
| Monthly income | $12,500 | $12,500 |
| Limit that binds | GDS: 39% = $4,875 | TDS: 44% = $5,500, less the car |
| Less tax and heat (assumed) | −$450 | −$450, −$900 car |
| Room for the mortgage payment | $4,425 | $4,150 |
| Maximum mortgage at 6.22%, 25 years | ≈ $678,000 | ≈ $636,000 |
Without the stress test, the same $4,425 payment at 4.22% would support about $822,000. The car loan costs about $42,000 of borrowing power on its own, which is why paying down a consumer debt before applying is often the cheapest way to qualify for more.
Step 3: how much of the rent counts
This is where rental purchases split into two very different cases.
You live in one unit (an owner-occupied duplex, or a house with a suite). With under 20% down, the mortgage is insured, and CMHC publishes the rules: lenders can count up to 100% of the rent from the other unit of a two-unit property, and up to 50% for three or four units. Take a duplex where the rented side brings in $1,650 a month (CMHC's October 2025 average for a Kamloops two-bedroom was $1,679). Added to the $150,000 income, that's $169,800. With $550 a month allowed for tax and heat and the insured qualifying rate of 5.96%, the maximum mortgage is roughly $779,000.
You won't live there. CMHC insurance isn't available, so you need at least 20% down, and the mortgage is uninsured. Your own home's costs stay in the calculation, and each lender has its own policy on the rental: some add a share of the rent to your income, some subtract it from the property's costs, and the share differs. The same property and the same rent can produce very different approvals. That's the main reason to use a broker rather than one bank.
Pre-qualified vs pre-approved
Pre-qualification is an estimate from your self-reported income and debts. Nothing is verified, so it carries little weight with a seller.
Pre-approval means the lender has checked your documents and credit and conditionally agreed to lend a set amount, usually with the rate held for a few months. It's what lets you write a clean offer quickly. It's still conditional: the lender will also need to approve the specific property.
What to have ready
- Two years of T4s and Notices of Assessment, plus recent pay stubs
- If you're self-employed or incorporated: two years of business financials and T2s, as lenders look at how your income is paid, not just how much the business earns
- Statements for every debt, including credit cards and lines of credit
- Proof of the down payment and where it came from
- For a rental: the expected rent, ideally backed by comparables or an existing lease
Five ways to qualify for more (or need less)
- Pay down consumer debt first. In the example above, a $900 car payment cost about $42,000 of borrowing power.
- Put more down. At 25% down instead of 20% on a $580,000 property, the mortgage is $435,000 instead of $464,000.
- Consider living in one unit. An owner-occupied duplex qualifies with less down and with the other unit's rent counted, under CMHC's published rules.
- Ask a broker to run each lender's rental method. The rules for counting rent on a property you won't live in differ by lender.
- Look at amortisation. A longer amortisation lowers the qualifying payment, where it's available to you. On a 30-year insured mortgage it's limited to first-time buyers and new builds.
Remember that the approval is a ceiling, not a target. Whether a rental makes sense at that price depends on its cash flow, which the stress test post and the monthly cost breakdown work through.
Common questions
How much can I borrow for a rental property in BC?
It depends on your income, debts and the lender's rules for counting rent. As a guide, a $150,000 household income with no other debts qualifies for about $678,000 on a 25-year mortgage at the early-2026 stress-test rate of 6.22%. Living in one unit of a duplex and counting the other unit's rent can lift that to about $779,000.
How much do I need to put down on a rental property in Canada?
At least 20% if you won't live in it, because CMHC mortgage insurance needs one unit to be owner-occupied. If you live in one unit of a two-unit property, the insured minimum down payment applies instead.
Does rental income count toward a mortgage?
Yes, but how much depends on the case. For an owner-occupied two-unit property with an insured mortgage, CMHC lets lenders count up to 100% of the other unit's rent; for three or four units, up to 50%. For a rental you won't live in, each lender sets its own rule.
What is the mortgage stress test rate in 2026?
The greater of your contract rate plus 2% or 5.25%. With the Bank of Canada's average uninsured 5-year fixed rate at 4.22% in March 2026, that's about 6.22%.
Sources: Bank of Canada — interest rates for new lending by chartered banks · CMHC — rental income for qualification · CMHC — debt service limits and qualifying rate (Refinance product page) · CMHC — Rental Market Survey data tables
Corrected 6 October 2026. The first version of this post put 5-year fixed rates at about 5.1% in May 2026, which gave a 7.1% qualifying rate. The Bank of Canada's average for new uninsured 5-year fixed mortgages was 4.22% in March 2026, so the qualifying rate was about 6.22%. Every rate here now comes from the Bank of Canada's lending data, and every rule from CMHC's published product pages.
Written by Jagatjeet, as part of a public BC Interior real estate learning journey. Published 11 May 2026. Corrected 6 October 2026. Updated 7 October 2026. Jagatjeet is working toward a BC real estate licence and is not a licensed realtor. Nothing here is financial, legal or tax advice.