Ratellow Research Team
The Ratellow Research Team is the institutional research desk behind Ratellow — a group of researchers, editors, and domain specialists who translate OSFI, CMHC, Bank of Canada, and Department of Finance Canada primary sources into the verified Mortgage Canon that powers every answer, guide, FAQ, and briefing on Ratellow.
Editorial standards
Every piece published under the Ratellow Research Team byline follows the same pipeline as the Ratellow Answer Engine: retrieval over our verified Mortgage Canon, drafting, and an editorial audit against primary sources — OSFI, CMHC, the Bank of Canada, and the Department of Finance Canada. Nothing ships without a verification date and explicit citations.
We do not publish individual author bylines because every piece is a product of this pipeline — not a single contributor. This matches how institutional research desks at banks and rating agencies attribute their work.
Corrections and updates are issued whenever a regulatory primary source changes — for example, the November 2024 OSFI straight-switch rule or the December 2024 increase of the CMHC insurable maximum to $1.5M. See our About page for the broader Ratellow editorial charter.
Recent research guides
All guides →2026 Canadian Mortgage Renewal Guide: 120–180 Day Rate Strategy & OSFI Rules Explained
Canadian homeowners renewing in 2026 can lock a rate 120–180 days before maturity. Stay with the current lender and the prescribed MQR never applies. An uninsured FRFI straight switch has been exempt since 21 November 2024 when loan amount and remaining amortization do not rise. Portfolio-insured low-ratio switches followed on 16 December 2024. Extra money or a longer amortization is always tested.
Switching Mortgage Lenders at Renewal in Canada: 2026 Straight-Switch Guide (No Stress Test)
Switch lenders at renewal without the prescribed MQR when the file stays a straight switch. Uninsured FRFI transfers have been exempt since 21 November 2024 if loan amount and remaining amortization do not rise — credit unions are not FRFIs. Portfolio-insured low-ratio switches followed on 16 December 2024 (unpaid principal may rise by at most $3,000 for costs; no equity take-out). High-ratio insurance transfer is a different path. Extra money or a longer amortization is always tested at the greater of contract + 2% or 5.25%. Guideline B-20 overlays can still apply.
Should You Switch Lenders or Stay at Renewal?
Stay is always untested. An uninsured straight switch has been untested since 21 November 2024. A refinance is always tested.
2026 Canadian Mortgage Refinance Guide: Costs & Break-Even Math
The 2026 guide to refinancing a mortgage in Canada: what it actually costs (prepayment penalties, IRD vs. three months' interest, legal and appraisal fees), the OSFI stress test and 80% LTV cap, the 90% CMHC secondary-suite refinance, refinance vs. renewal, and the break-even math that shows whether it's worth it.
2026 First-Time Home Buyer Rebates, Tax Credits & Incentives in Canada
Discover every first-time home buyer rebate and tax credit available in Canada in 2026 — including the new First-Time Home Buyers' GST/HST Rebate (Bill C-4, Royal Assent March 12, 2026), which gives eligible FTHBs up to $50,000 back on new builds up to $1M. This guide covers that program, the Home Buyers' Tax Credit (HBTC), the Home Buyers' Plan (HBP), the First Home Savings Account (FHSA), Ontario's stacked Enhanced HST Rebate (up to $80K provincial on top of the federal for combined ~$130K relief), and key provincial LTT programs — plus how 2026 rule changes like 30-year amortizations and the $1.5M insured cap fit together.
Fixed vs. Variable Mortgage Canada 2026: Which Rate Strategy Saves You More?
Compare fixed vs. variable mortgage rates in Canada for 2026 and find the right term strategy for your situation. With the Bank of Canada (BoC) policy rate at 2.25% and the prime rate at 4.45% as of early 2026, this guide breaks down payment stability, break penalties, Interest Rate Differential (IRD) calculations, and how new OSFI (Office of the Superintendent of Financial Institutions) and CMHC (Canada Mortgage and Housing Corporation) rules affect your decision. Whether you're buying your first home or renewing an existing mortgage, learn which term offers the best balance of safety and long-term savings.
Recent briefings
All briefings →Does a condo special assessment turn a 2026 mortgage renewal into a refinance?
The payment goes from $2,743 to $3,219. The $18,000 assessment is what decides whether the bank still treats this as a renewal.
September 2, 2026 BoC Decision: Seventh Hold at 2.25%
The Bank of Canada held overnight at 2.25% on September 2 — the seventh consecutive hold. What that does to your payment, and what to do now.
The Real Cost of Switching Lenders at Renewal in 2026
Switching lenders at renewal costs about $833 to $3,465 all in. Here's the rate delta that pays it back on a $500,000 mortgage over 5 years.
3-Year vs 5-Year Fixed at Renewal 2026: 3.94% or 4.14%
Live card 3.94% vs 4.14%. Cheaper term is not automatically better. $49/month on $470,980 / 20y.
Ottawa Mortgage Rates 2026: 5-Year Fixed 4.14% vs 3.49% Variable
As of 24 August 2026, Ottawa's best 5-year fixed is 4.14%. The 3.49% figure in search is the 5-year variable, not a fixed rate.
Mortgage Renewal 2026–27: Switch, Stay, or Refinance
Stay is untested. Uninsured straight switch untested since 21 Nov 2024. Refinance always tested.
Areas of coverage
- OSFI Guideline B-20 and the mortgage stress test
- CMHC, Sagen, and Canada Guaranty insurance rules
- Bank of Canada policy rate transmission to Prime
- Mortgage renewal mechanics and the 2025–27 renewal cliff
- Refinance break-even math and IRD penalties
- First-time buyer programs (HBP, FHSA, LTT rebates)
- Readvanceable mortgages, HELOCs, and collateral charges
- Fixed vs. variable strategy under the current rate path