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Interest-Only Mortgage Calculator | Canada
Interest-Only Mortgage Calculator is designed to help you estimate borrowing costs, compare repayment scenarios, and sense-check property finance decisions. It works best when you want a fast, comparable estimate before you speak to a lender, provider, adviser, employer, or supplier. Use it as a planning tool rather than a final quote. This version is framed for Canada users where regional assumptions matter, so you can test a few scenarios and see how changes in the main inputs affect the outcome.
Interpretation
What your result means
Use the notes below to understand the main figures in your result and when this calculator is most useful.
When to use this calculator
- Before comparing lenders, brokers, or repayment options.
- When you want to test how a different deposit, rate, or term changes affordability.
- When you need a quick estimate before using a formal quote or agreement in principle.
Monthly Payment
Use this to check whether the scenario fits comfortably within your regular budget.
Total Interest
This shows the long-run cost of borrowing, which is useful when comparing terms or overpayment options.
Next steps
What to do next
Continue with the most relevant next step based on your result.
Browse Finance & Mortgages calculators
Compare the surrounding tools in this topic before making a final decision.
Mortgage Calculator
Calculate your monthly mortgage payments instantly. Enter loan amount, interest rate and term.
Compare mortgage options
Next step after this calculation
Example
A realistic Canada planning example
A realistic example to help you understand how the numbers fit together.
Loan Amount ({symbol})
CA$400,000
Interest Rate (%)
5%
Term (Years)
25 years
After entering these figures, compare monthly payment and total interest before deciding which scenario looks strongest.
Avoid mistakes
Common mistakes
A few things that often lead to misleading or incomplete results.
FAQ
Frequently asked questions
Helpful answers to common questions about this calculator.
How does the mortgage calculator work?
This calculator uses the standard amortisation formula to compute monthly payments based on loan amount, interest rate, and term. The formula accounts for compound interest accrued monthly over the loan period.
What inputs do I need to calculate a mortgage payment?
You need three pieces of information: the loan amount (principal), the annual interest rate as a percentage, and the loan term in years. These values are multiplied by the number of monthly periods to determine your payment.
Is this mortgage calculator accurate?
This calculator provides accurate estimates based on standard amortisation. However, it does not include property taxes, insurance, homeowners' association fees, or potential rate adjustments. Always verify with your lender for official figures.
Can I use this calculator for buy-to-let mortgages?
Yes, this calculator works for any mortgage type. Simply enter your loan amount, interest rate, and term. Note that buy-to-let mortgages may have different rates and terms than residential mortgages.
What does the monthly payment figure mean?
The monthly payment is the amount you must pay each month to fully repay your mortgage over the specified term. This covers both principal and interest, though it excludes taxes, insurance, and other fees.
How often should I recalculate my mortgage?
Recalculate if your circumstances change: when rates change, if you're considering overpayments, or if you're evaluating refinancing options. Annual reviews are recommended to stay informed about your debt.
Is my financial data private?
All calculations are performed in your browser. We do not store, transmit, or log any of your input data. For more information, please see our privacy policy.
What assumptions does this calculator make?
This calculator assumes a standard amortising mortgage with fixed monthly payments throughout the term. It does not account for variable rates, payment holidays, offset mortgages, or early repayment penalties.
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