Switching Lenders at Renewal: What Actually Requires Requalifying Now

The assumption a lot of renewing homeowners still carry

For years, the honest advice at renewal was: staying with your existing lender is easy, and switching means requalifying from scratch. That gap was real, and it was also lopsided — a borrower who stayed put wasn't checked on at all, while a borrower who wanted to leave for a better deal had to clear a stress test their own lender never made them clear.

That imbalance is most of why the assumption still floats around today, even though the underlying rule changed for a lot of borrowers back in late 2024. If you're renewing this year and haven't looked at your options since before then, this is worth five minutes.

What OSFI actually changed

The Office of the Superintendent of Financial Institutions (OSFI) regulates the stress test that federally regulated banks apply. Effective November 21, 2024, OSFI stopped prescribing a specific qualifying benchmark for what it calls an uninsured "straight switch" — moving an existing uninsured mortgage from one federally regulated lender to another, with no increase to the remaining amortization period or the loan amount.

We will no longer be expecting the application of our MQR where a borrower is switching from one federally regulated lender to another, so long as the amortization period and the loan amount are not increased.— Tolga Yalkin, OSFI Assistant Superintendent, as reported by Canadian Mortgage Trends

Before this, a household switching lenders at renewal had to prove they could handle their payment at a qualifying benchmark roughly two percentage points above what they were actually being offered — the same test a first-time buyer clears at purchase. For someone whose income, credit or other circumstances had shifted since they first qualified, that test could quietly rule out a move even when the household had been managing the mortgage they already had without any trouble.

Insured mortgages — generally, anything with less than 20% down — were never subject to this at renewal in the first place, switch or no switch. What changed in 2024 closed most of the gap for uninsured borrowers instead.

What still requires the full stress test

The straight-switch exemption is specific, not a blanket removal of underwriting. Three things take a renewal outside of it and back into full requalification:

• Increasing your loan amount. Any top-up beyond the existing balance, aside from a small allowance some lenders permit for penalties or transaction costs, is treated as new borrowing.
• Extending your amortization. Stretching your remaining term back out — a common way to lower a payment at renewal — takes the file outside the straight-switch definition.
• Refinancing to access equity. A cash-out refinance is a new application by nature, whichever lender it's with, and has always required full requalification.

In other words: the exemption is for people who want the same mortgage, on the same terms, from a different lender. The moment the deal itself changes — bigger balance, longer amortization, cash out — you're applying like anyone else, and the qualifying benchmark applies like it always has.

This isn't a blank cheque, either

OSFI's own guidance to lenders is explicit that dropping the prescribed benchmark doesn't mean dropping underwriting. "An institution should assess the loan like any other new origination and should continue to apply principles of sound residential mortgage underwriting," the regulator wrote, including due diligence on the borrower and debt-service ratios "calculated conservatively and appropriately stressed for varied financial and economic conditions."

What that means in practice: each lender now sets its own bar for a straight switch, informed by its own risk appetite rather than one number OSFI hands down. A borrower whose income dropped, whose credit took a hit, or who added significant debt since they last qualified can still be turned down or offered less favourable terms by a new lender — there just isn't a single prescribed test standing in the way before that underwriting even happens.

What this means for your renewal

The practical shift is leverage. Before late 2024, a lot of households stayed with their existing lender at renewal by default, not necessarily because it was the best available deal, but because switching carried a real qualifying hurdle theirs didn't. For an uninsured straight switch today, that specific hurdle is largely gone.

That doesn't make comparing offers automatic or effortless — you're still submitting an application, still being assessed, and still deciding between structures that behave differently if your plans or your household budget change mid-term. It does mean the playing field between "stay" and "switch" is closer to level than it was, which is exactly why this is worth checking before you assume renewing with your current lender is the path of least resistance. Our renewal page walks through the rest of the timeline, and our calculators use the correct Canadian semi-annual compounding math so you can compare what a new offer actually costs against what staying would.