Quick answer: A fixed mortgage generally keeps the interest rate unchanged for the term, while a variable rate may rise or fall. The better choice depends on budget flexibility, risk tolerance, expected plans and the mortgage contract—not simply today’s advertised rate.
Last verified: September 15, 2026
Fixed-rate mortgage
A fixed rate can make budgeting more predictable because the rate does not change during the term. The tradeoff may include a higher starting rate or a different prepayment-penalty calculation if the mortgage is broken early.
Variable-rate mortgage
A variable rate changes with the lender’s reference rate. Some products have payments that change; others may keep the scheduled payment stable while the amount applied to interest and principal changes. Buyers should ask exactly how their proposed product operates.
Seven questions to ask
- Can the payment increase, or does the amortization change?
- What happens at a trigger rate or trigger point?
- How is the penalty calculated if the mortgage is broken?
- Can the variable mortgage be converted to fixed, and on what terms?
- What prepayment privileges are included?
- Is the mortgage portable?
- Could the household budget manage a meaningful payment increase?
The Financial Consumer Agency of Canada explains that variable-rate products can behave differently and may expose borrowers to rising payments or negative-amortization risk.
Rate is not the only cost
Compare the term, amortization, payment frequency, privileges, restrictions, fees and penalties. A slightly lower rate may not be the least expensive option if the borrower expects to move, refinance or make large prepayments.
Before choosing
- Complete a current mortgage pre-approval.
- Stress-test the household budget.
- Ask for written illustrations of different rate scenarios.
- Review the commitment and disclosure documents carefully.
- Obtain advice from a licensed mortgage professional suited to your circumstances.
Official sources
Frequently asked questions
Can a variable mortgage payment stay the same?
Some variable products have fixed scheduled payments while the allocation between interest and principal changes. Others change the payment when rates change. The commitment should explain the specific mechanism.
Can I switch from variable to fixed?
Some lenders allow conversion, but the available fixed rate, remaining term and conditions may not be the same as choosing fixed at the outset. Ask for the conversion policy in writing.
Which option is safer?
Fixed rates generally provide greater rate certainty during the term, while variable rates create more exposure to market changes. Suitability depends on cash-flow capacity, plans and comfort with uncertainty.
What if I expect to sell soon?
Prepayment penalties, portability and term length may become especially important. Compare the cost of leaving the mortgage—not only the starting rate.
General information only: This is not mortgage or financial advice. Product terms and suitability vary.









