If you are purchasing a Condo, please do not forget to allow for the Strata Fees. Revenue or rental homes are calculated differently than this. Self-employed borrowers should consult a professional. On High-Ratio Mortgages, CMHC may want you to show your tax returns to prove the income you are claiming. Looking over the factors, one can see that the lower the rate, the larger the mortgage one will qualify for.
Most Lenders have different rules and rates.