Most buyers meet the mortgage stress test as a number on a pre-approval that is lower than they expected. It is not a judgment on your finances. It is a fixed rule, it has a short formula, and once you know where it applies and where it does not, you can plan around it in Langley and South Surrey.
The rule in one line
The Office of the Superintendent of Financial Institutions sets the minimum qualifying rate for uninsured mortgages at the greater of the mortgage contract rate plus 2 per cent, or 5.25 per cent. OSFI calls the 2 per cent the buffer and the 5.25 per cent the floor, and it obliges federally regulated lenders to apply the test to most newly underwritten borrowers.
Insured mortgages, the ones with less than 20 per cent down, have their own rule set by the Department of Finance. It is the same formula. The Department of Finance's December 2023 statement kept it as the greater of the contract rate plus 2 per cent, or 5.25 per cent.
So in practice, you are not approved at the rate you will pay. You are approved at the payment you would face at a rate 2 points higher, or at 5.25 per cent if that is higher still.
What that does on a Langley townhouse
The Fraser Valley Real Estate Board's October 2026 benchmark for a Langley townhouse is $800,600. With 20 per cent down, the mortgage is $640,480. The figures below are my own arithmetic on a 25 year amortization, using a contract rate of 4.25 per cent purely as an example, not a quote:
- The payment you would actually make at 4.25 per cent. About $3,456 a month.
- The payment you have to qualify at, 6.25 per cent. About $4,193 a month.
That is roughly $737 a month of room your income has to show that your bank account will never actually spend. Put the other way, the qualifying payment of $4,193 would carry about $777,000 of mortgage at the contract rate. Qualified at 6.25 per cent, it carries $640,480. The test takes about 18 per cent off what the same income can borrow at that contract rate.
If contract rates fall low enough, the floor takes over. At a 3 per cent contract rate you still qualify at 5.25 per cent, not at 5 per cent. On the same mortgage that is about $3,031 a month to pay and about $3,817 a month to qualify.
Where the $1.5M line falls here
Since December 15, 2024, the price cap for insured mortgages has been $1.5M, up from $1M. CMHC's rule is a minimum of 5 per cent down on the first $500,000 and 10 per cent on the remainder, and no mortgage insurance at $1.5M or more.
That cap runs straight through this market. On the October benchmarks:
- Langley townhouse, $800,600. Insurable. The minimum down payment works out to $55,060.
- Langley detached, $1.448M. Still under the cap. The minimum down payment is $119,810.
- South Surrey and White Rock detached, $1.607M. Over the cap. No insurance, so 20 per cent down, $321,300 at the benchmark.
A typical detached house in Langley can be bought with about 8 per cent down. The typical one in South Surrey or White Rock needs 20. Benchmarks are a typical home, not every home, so a particular listing can land on either side of the line. Check the price of the one you want, not the area average.
Thirty years for first time buyers and new builds
On the same date, the federal government made 30 year amortizations available on insured mortgages to all first time buyers and to all buyers of new builds. That changes the qualifying arithmetic. In my example above, the $4,193 qualifying payment that supports $640,480 over 25 years supports about $686,900 over 30, still tested at 6.25 per cent. That is roughly $46,000 of extra borrowing room from the amortization alone, paid for with five more years of interest.
In Langley the new build half of that rule is not a side note, with the density coming near the SkyTrain line set out in transit oriented areas in Langley. What you sign on a presale, and when the mortgage is actually approved, is covered in buying a presale in Langley. The qualifying date matters: a presale buyer is qualified near completion, at whatever the rule and the rates are then.
When the test does not apply
Renewing has been the most common question since 2024. OSFI does not expect lenders to apply the minimum qualifying rate to an uninsured straight switch at renewal, meaning you move an uninsured mortgage from one federally regulated lender to another with no increase in the amortization and no increase in the loan. That took effect November 21, 2024. For insured mortgages, the Department of Finance says holders are not required under the regulations to requalify when switching lenders at renewal.
The word that matters is straight. Add money for a renovation, stretch the amortization, or refinance, and you are qualifying again.
The test is also a federal rule for federally regulated lenders. BC credit unions are supervised provincially by the BC Financial Services Authority, which publishes its own residential mortgage underwriting guideline for them. If you are comparing a bank with a credit union, ask each one directly what rate it qualifies you at.
The newer limit you will not see on your file
OSFI also introduced loan to income limits on lenders' uninsured mortgage portfolios. The largest lenders started on November 1, 2024 and the rest by January 2025. OSFI is explicit that these limits do not apply to individual borrowers or transactions. They cap how much high multiple lending a lender can carry in total, which can show up as a lender being more or less willing on a file near the top of your range, without it ever being called a rule.
A review comes up every December
OSFI says it reviews the floor and the buffer at least annually, and Finance and OSFI have communicated the qualifying rate each December since 2021. The next one is weeks away. I would not plan a purchase around it changing. I would plan around knowing your number under the current rule before you write an offer, and rerunning it if anything moves.
What I would do with this
- Before you shop. Get pre-approved on the current rule and ask the lender for the qualifying rate they used, not only the amount.
- Near $1.5M. Know which side of the cap the house you want sits on before you fall for it. Your down payment depends on it.
- At renewal. A straight switch lets you shop lenders without requalifying. Adding money does not.
- Buying new. If you are a first time buyer or buying new construction, ask about 30 years, then decide whether you want it.
The arithmetic and the market sit next to each other. Prices in Langley, South Surrey and White Rock are below a year ago, and the October Langley market update and October South Surrey and White Rock update have the detail. What a first purchase in Langley looks like is in buying in Langley under $750,000, and what a rate move does to qualifying is in what the October rate increase changes here.
Sources
Office of the Superintendent of Financial Institutions: minimum qualifying rate for uninsured mortgages page, the November 21, 2024 notice on straight switches and loan to income limits, and the minimum qualifying rate backgrounder. Department of Finance Canada: December 15, 2024 release on the $1.5M cap and 30 year amortizations, and the December 2023 statement on the insured minimum qualifying rate. CMHC mortgage loan insurance page for minimum down payments. BC Financial Services Authority residential mortgage underwriting guideline for BC credit unions. Benchmark prices from the Fraser Valley Real Estate Board's October 2026 statistics package. Payment, borrowing and down payment figures are my own arithmetic on Canadian semi-annual compounding, not a lender quote. Checked November 11, 2026. Not financial advice.