Amortization comparison
Compare mortgage structures to find the most efficient payoff.
Interactive calculator
Amortization comparison calculator
Compare mortgage structures to find the lowest interest and fastest payoff.
Calculation notes
Methodology for the amortization comparison calculator
Compare up to four amortization scenarios side by side — different rates, terms, payment frequencies, and prepayment strategies in a single view.
See payment amounts, total interest, payoff dates, and remaining balances at renewal for each scenario simultaneously.
Evaluate trade-offs: 25 vs 30-year amortization, fixed vs variable rate assumptions, and the impact of accelerated payments across scenarios.
Export the comparison as a report to share with your broker when deciding on a mortgage structure.
Inputs to check
- Multiple mortgage balances and rates
- Amortization lengths
- Payment frequencies
- Optional prepayments
Assumptions
- Each scenario assumes a fixed rate for its term; variable-rate scenarios should use conservative assumptions.
- Schedules use Canadian semi-annual compounding regardless of payment frequency.
- No fees are included unless you add them manually as extra cash flows.
- Results are comparative estimates — final numbers depend on lender pricing and actual renewal rates.
How this calculator works
Compare up to four amortization scenarios side by side — different rates, terms, payment frequencies, and prepayment strategies in a single view.
See payment amounts, total interest, payoff dates, and remaining balances at renewal for each scenario simultaneously.
Evaluate trade-offs: 25 vs 30-year amortization, fixed vs variable rate assumptions, and the impact of accelerated payments across scenarios.
Export the comparison as a report to share with your broker when deciding on a mortgage structure.
Inputs you will need
- Multiple mortgage balances and rates
- Amortization lengths
- Payment frequencies
- Optional prepayments
Assumptions and limitations
- Each scenario assumes a fixed rate for its term; variable-rate scenarios should use conservative assumptions.
- Schedules use Canadian semi-annual compounding regardless of payment frequency.
- No fees are included unless you add them manually as extra cash flows.
- Results are comparative estimates — final numbers depend on lender pricing and actual renewal rates.
Example scenarios
25-year vs 30-year side by side
The 25-year saves ~$81K in total interest on $500K at 4.50% but costs $224 more per month. See both paths at once.
Different rates, same balance
Model $400K at 4.00%, 4.50%, 5.00%, and 5.50% — a 1.50% rate spread changes monthly payments by $347 and total interest by $124K.
Fixed vs variable scenario
Compare 5-year fixed at 4.50% against variable starting at 4.00% that rises 0.50%/year — see which costs less total interest over the term.
Prepayment strategy comparison
No prepayments vs $200/month vs $5,000 annual lump sum vs accelerated bi-weekly — see years and dollars saved across all four strategies.
Related tools
Use this payment output in the next decision
Payment and amortization scenarios matter most when they connect to a rate, a contract strategy, and a broker-reviewed fallback plan if rates move or priorities change.
Guides
Read the Canada-specific playbook before you commit to the next step.
Execution
Use the broker workflow, rates pages, or secure dashboard to move from estimate to action.
Frequently asked questions
How many scenarios can I compare?
Up to four at a time — covers your current offer, an alternative rate, a different amortization, and a prepayment scenario, all visible on one screen.
Can I export comparisons?
Yes. Export side-by-side reports as PDF or CSV with payment, total interest, payoff date, and remaining balance at each renewal for all scenarios.
Does it handle prepayments per scenario?
Yes. Each scenario can have its own prepayment strategy — different lump sums, recurring amounts, or payment frequencies.
What is the difference between this and the amortization schedule?
The schedule shows the full payment-by-payment breakdown for one mortgage. The compare tool shows headline numbers for up to four mortgages side by side. Use the schedule for deep planning, and compare for quick trade-off decisions.
Can I model rate changes at renewal?
Yes. Set different rates and terms per scenario — e.g., 5-year fixed at 4.50% vs 2-year fixed at 4.25% renewing at estimated 3.75% — see cumulative interest across both terms.