Canadian Mortgage
Calculate Canadian mortgage payments with semi-annual compounding, CMHC insurance premiums, and amortization schedules specific to Canada
Formula
Payment with semi-annual compounding
Canadian mortgages use semi-annual compounding. CMHC insurance is added for down payments under 20%.
Worked Examples
Example 1: Calculate CMHC Premium
Problem:$600,000 home, 10% down payment.
Solution:Down payment: $60,000 Mortgage: $540,000 CMHC rate at 10% down: 3.1% Premium: $540,000 × 0.031 = $16,740 Total mortgage: $556,740
Result:CMHC: $16,740
Example 2: Accelerated Bi-Weekly
Problem:$400,000 mortgage, 5%, 25-year amortization.
Solution:Monthly payment: ~$2,326 Accelerated bi-weekly: $2,326 ÷ 2 = $1,163 26 payments × $1,163 = $30,238/year vs 12 × $2,326 = $27,912/year Pays off ~3 years early!
Result:Saves ~$20,000+ interest
Example 3: Stress Test
Problem:Qualify at 5% rate, what stress test rate?
Solution:Stress test rate = higher of: - Contract rate + 2% = 7% - Floor rate = 5.25% You must qualify at 7%. This reduces max affordability by ~20%.
Result:Must qualify at 7%
Frequently Asked Questions
How is a Canadian mortgage different from US?
Canadian mortgages use semi-annual compounding (not monthly), typically have 5-year terms (not 30-year fixed), and require CMHC insurance below 20% down. Rates are often lower due to different market structure.
What is accelerated bi-weekly payment?
Take monthly payment, divide by 2, pay every 2 weeks. Results in 26 payments = 13 months of payments yearly. Pays off mortgage ~3 years faster.
Why does compounding matter?
Canadian mortgages compound semi-annually, not monthly. A 5% Canadian rate equals about 5.06% US-style monthly compounding. Slightly better for borrowers.
Can I pay off my mortgage early?
Most mortgages allow 10-20% prepayment annually without penalty. Breaking a fixed-rate mortgage early can have significant penalties (IRD or 3 months interest).
What is a variable vs fixed rate?
Fixed: rate locked for term (1-10 years). Variable: fluctuates with prime rate. Variable usually lower but riskier. Most Canadians choose 5-year fixed.
What credit score do I need for the best mortgage rates?
A FICO score of 760 or higher typically qualifies you for the lowest advertised mortgage rates. Dropping from 760 to 700 can cost you 0.25-0.50% more in interest — on a $400,000 30-year loan, that difference costs roughly $60-$120 more per month and over $25,000 in extra interest. Scores between 620-699 still qualify for conventional loans but at noticeably higher rates. Scores below 580 generally require FHA loans, which accept down payments as low as 3.5% but mandate mortgage insurance for the life of the loan. Before applying, pay down revolving balances to below 30% of credit limits — this alone can boost your score 20-40 points.
What is the difference between fixed-rate and adjustable-rate mortgages?
A fixed-rate mortgage locks your interest rate for the entire loan term — 15, 20, or 30 years — so your principal and interest payment never changes. This predictability is valuable in rising-rate environments. An adjustable-rate mortgage (ARM) begins with a lower fixed rate for an introductory period (commonly 5, 7, or 10 years), then resets annually based on an index like SOFR plus a margin. A 5/1 ARM might start at 5.5% versus a 30-year fixed at 6.5%, saving roughly $220/month on a $400,000 loan. ARMs are advantageous if you plan to sell or refinance before the first adjustment, but carry payment uncertainty afterward if rates have risen significantly.
How do mortgage points work?
Mortgage discount points are prepaid interest you pay at closing to permanently reduce your loan's interest rate. One point costs 1% of the loan amount — on a $350,000 mortgage, one point costs $3,500 — and typically lowers your rate by 0.20-0.25%. To determine whether buying points makes sense, calculate your break-even period: divide the upfront cost by your monthly savings. For example, $3,500 paid to save $55/month breaks even in about 64 months (5.3 years). If you plan to stay in the home beyond that point, buying points saves money. If you may sell or refinance sooner, keep the cash. Points are tax-deductible in the year of purchase for a primary residence.
When should I consider refinancing my mortgage?
Refinancing makes financial sense when the long-term interest savings exceed the upfront costs. The standard threshold is a rate reduction of at least 0.5-0.75%, though the actual benefit depends on your loan balance and remaining term. Calculate your break-even: if refinancing costs $5,000 and saves $175/month, break-even is about 29 months. You should also consider refinancing to switch from an ARM to a fixed rate for payment certainty, to eliminate PMI if your equity has grown, or to shorten your term from 30 to 15 years to save tens of thousands in interest. Avoid resetting a 25-year-old mortgage back to a new 30-year loan — you may pay more total interest even at a lower rate.
How does the debt-to-income ratio affect mortgage approval?
Lenders measure two debt-to-income ratios to assess affordability. The front-end (housing) DTI divides your total monthly housing costs — principal, interest, property taxes, insurance, and HOA fees — by gross monthly income; most conventional loans cap this at 28%. The back-end (total) DTI adds all other monthly debt obligations (car loans, student loans, credit card minimums) and is typically capped at 36-43% for conventional loans. FHA loans allow back-end DTIs up to 50% for borrowers with strong compensating factors like high cash reserves. For example, earning $7,000/month with a $1,800 mortgage payment and $500 in other debts gives a back-end DTI of 33%, which is comfortably within conventional limits.