The minimum qualifying rate, universally called the stress test, is defined as the greater of the mortgage's contract interest rate plus 2%, or a fixed floor — currently 5.25% — whichever number is higher. The 2% buffer exists to demonstrate a borrower could absorb a real financial hardship without immediately defaulting; the 5.25% floor exists as backstop against broader economic risk regardless of how low contract rates fall.
Both GDS and TDS in Modules 02 and 03 are calculated using this rate, not the contract rate the client will actually pay. When contract rates are well below 3.25%, the floor is what binds — the borrower is being qualified at 5.25% no matter how attractive their actual rate is. When contract rates rise above 3.25%, the +2% buffer takes over as the binding constraint instead.
The minimum qualifying rate as an OSFI-mandated requirement applies to federally regulated financial institutions — the banks, trust companies and federally chartered lenders that fall under OSFI's supervision through Guideline B-20. Provincially regulated credit unions and caisses populaires are not directly subject to OSFI's rules, and are not required to apply the federal MQR, though many voluntarily apply a similar standard or follow requirements set by their own provincial regulator.
This creates a real, if narrow, distinction brokers should know rather than assume away: a provincially regulated credit union is not automatically bound by the federal stress test the way a bank is. That does not mean every credit union offers materially different qualifying math in practice — many choose not to differentiate themselves that way — but it is not a rule you can rely on as fixed across every lender type.
For insured mortgages, the qualifying-rate requirement does not come from OSFI at all — it comes from the mortgage insurer, CMHC, Sagen or Canada Guaranty, as a condition of insuring the loan. Because insurer rules apply nationally to any lender using their insurance, an insured file is qualified at the MQR regardless of whether the lender is federally or provincially regulated. The credit-union carve-out described above is specifically about uninsured mortgages at federally versus provincially regulated institutions — it has no bearing on an insured file.
This is worth stating plainly to a new agent because it is easy to conflate 'which regulator applies to this lender' with 'which qualifying rate applies to this file' — they are related but not the same question, and the insurance category answers the second one first.
OSFI exempted straight switches of uninsured mortgages between federally regulated lenders from the minimum qualifying rate, effective 21 November 2024. A straight switch means the borrower is moving their existing mortgage to a new lender at renewal with no increase to the outstanding loan amount and no increase to the remaining amortization period — in other words, pure lender-to-lender portability of an existing obligation, not new borrowing.
Under this exemption, the switching lender qualifies the borrower using the new contract rate rather than the MQR. This was a deliberate policy response to borrowers feeling trapped at renewal — unable to shop their mortgage to a new lender for a better rate because they could not pass the stress test on the new offer, even though they had been living with the existing payment for years without issue.
The exemption is narrow by design. Any increase to the loan amount — a refinance folded into the renewal, a blend-and-increase, a debt consolidation — takes the transaction out of straight-switch territory and back under the full MQR. The same is true of an amortization extension beyond what remains on the current mortgage. And a borrower renewing with their existing lender, rather than switching to a new one, was never subject to a stress test at renewal in the first place under long-standing industry practice — the exemption specifically solved the switch problem, not the renewal problem generally.
For a broker, this means the qualifying conversation at renewal now genuinely depends on the shape of the transaction: staying put, switching straight across, or increasing the loan all lead to different qualifying math, and getting that classification right before quoting a client is worth the extra two minutes.
A client wants to switch their mortgage to a new lender at renewal, keeping the same balance and the same remaining amortization, but the new lender's rate is higher than the borrower's current rate. Does the borrower need to qualify at the minimum qualifying rate?
This is exactly the scenario the November 2024 exemption was built for: no increase in balance, no increase in amortization, just a move to a new federally regulated lender at renewal — a straight switch, qualified at the new contract rate. The tempting wrong answer is that every switch requires the MQR, which was true before the exemption and is still what a lot of outdated training repeats, but it stopped being accurate for straight switches specifically. It is equally wrong to claim no stress test has ever applied to anything — the exemption is narrow, and a loan increase or amortization extension would still trigger the full MQR.
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