Explained
Which mortgage lenders are federally regulated, and why it changes your switch
OSFI writes the stress test, and OSFI regulates banks — not credit unions, not monolines, and not every institution whose name suggests otherwise.
Written by Hermann Gael Nang-Song · Last reviewed August 25, 2026Founder of LoonieLodge Inc., and author of the Canadian mortgage engine this site runs on.
One rule, and a perimeter most borrowers have never been told about
The Office of the Superintendent of Financial Institutions supervises federally regulated financial institutions: banks, federal trust and loan companies, and federally incorporated insurers. Its Guideline B-20 is where the mortgage stress test comes from, and it binds those institutions and nobody else.
A provincially regulated credit union or caisse is outside B-20 entirely and sets its own qualifying rule, which may be tighter or looser. A monoline — a mortgage lender that takes no deposits — is not an OSFI institution either, though where the mortgage is insured the insurer's and the federal Department of Finance's rules still reach it. A private lender or mortgage investment corporation is outside all of it.
Where it decides money: the straight-switch exemption
Since November 2024 OSFI no longer prescribes the stress test on a straight switch at renewal — an uninsured mortgage moving from one federally regulated lender to another, on the same balance and the same or a shorter amortization. That is narrower than it is usually reported, and both ends of the move have to be federally regulated.
So leaving a credit union for a bank is a switch, and it is still stress-tested: the receiving bank is bound by B-20 and the loan it is being asked to take on was never qualified under it. Going the other way — a bank to a credit union — is neither exempted nor caught, because OSFI has nothing to say about where you are going. Those are three different answers to what looks like one question, and which one you get depends on facts about two institutions rather than about you.
The names do not tell you
Two credit unions have continued under the Bank Act and are therefore federally regulated — Coast Capital Savings in 2018 and UNI Financial Coopération in 2016 — so the words "credit union" in a name settle nothing. Several familiar mortgage brands are monolines rather than banks. And Desjardins, the largest mortgage lender in Quebec, is a provincially regulated cooperative.
Some institutions fit none of the categories at all. ATB Financial is an Alberta Crown corporation: neither a federally regulated institution nor a credit union, and the honest answer about its qualifying rule is that we do not know it. Ask your lender directly — it is a question they have to be able to answer.
Worked example
Eight lenders Canadians actually name
Classified by the same registry the app uses when it needs a starting value for this question. It is a suggestion and never a finding: an unrecognised name comes back as unknown rather than being rounded to the commonest case.
| Lender | Who regulates it |
|---|---|
| RBC Royal Bank | Bank or federal trust company |
| Equitable Bank | Bank or federal trust company |
| Coast Capital Savings | Bank or federal trust company |
| Desjardins | Credit union or caisse (provincial) |
| Vancity | Credit union or caisse (provincial) |
| First National | Monoline lender |
| MCAP | Monoline lender |
| ATB Financial | Not sure |
Four of these eight are not what a reader would guess from the name. If your lender is not on the list, the authoritative answer is OSFI's own register of federally regulated financial institutions — this table is a convenience over the handful of names people actually type, not a mirror of it.
Before you shop a renewal, find out who regulates the lender you are leaving and the one you are joining. It decides whether you have to pass the stress test again, and that decides which offers are actually available to you.
Run it on your own numbers
The same arithmetic, on the figures from your own mortgage. No account, and nothing you type is stored.
Sources
Primary sources, named. Where a figure comes from a statute we cite the section, because the section is what your lender's lawyer will read.
- OSFI — Who we regulate
- OSFI Guideline B-20 — Residential Mortgage Underwriting Practices and Procedures
- OSFI — Straight switch exemption, effective 21 November 2024
Written and maintained by the author of the mortgage engine this site runs on, and reviewed against the sources named below. LOONIELODGE does not arrange mortgages, takes no commission from lenders, and nothing here is ranked or recommended because somebody paid for it.
Educational and informational only — not licensed mortgage, financial, legal or tax advice. Every lender's contract governs its own mortgage, and the figures here are estimates from stated assumptions rather than quotes. Confirm anything you intend to act on with your lender and a licensed professional.
Last reviewed August 25, 2026
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