How this mortgage comparison calculator works
The calculator builds two amortization estimates using the same loan amount and comparison period. It then compares estimated payment, interest, fees, remaining balance and total cost.
Rate, term and fee tradeoffs
A lower rate can reduce payments and interest, but upfront fees can change the result. A longer term can lower the payment while leaving a higher balance or more interest over time.
Remaining balance and total cost
The total cost view can include remaining balance at the end of the comparison period. This helps compare scenarios over a holding or review period rather than only comparing monthly payments.
What this calculator does not include
This calculator does not include taxes, lender eligibility, break fees, offset or redraw accounts, mortgage insurance, changing rates, advice costs or product recommendations.
Key terms and assumptionsFormula notes, key terms, source assumptions and limits used in this calculator.
These notes are specific to this calculator. Read the property methodology notes for shared property formulas, region settings and estimate limits.
- Comparison period
- The comparison period is the number of years used for the side-by-side cost estimate.
- Upfront fees
- Upfront fees are added to each scenario's estimated cost at the start of the comparison.
- Remaining balance
- Remaining balance is the estimated unpaid loan balance at the end of the comparison period.
- Total cost
- The total cost view includes payments made and upfront fees, plus remaining balance if that setting is enabled.
- Break-even
- Break-even is the estimated period when a higher-fee option catches up through lower cumulative payments.
- Region settings
- Region settings change defaults, labels and currency formatting only. They do not convert exchange rates or create country-specific results.
- General estimate
- The result does not include taxes, lender eligibility, break fees, offset accounts, changing rates, advice costs or product recommendations.
Guides and methodology
Plain-English notes that explain the assumptions behind related calculators and tools.
Related calculators
- Mortgage Payment Calculator Estimate monthly mortgage or home-loan payments from property price, deposit, interest rate, loan term, repayment type, taxes, insurance and fees.
- Mortgage Amortization Calculator Estimate a mortgage amortization schedule with principal, interest, remaining balance, total interest and payoff date.
- Mortgage Refinance Calculator Compare a current mortgage with a possible new loan using payment change, refinance costs, break-even months and interest difference.
- Extra Mortgage Payment Calculator Estimate how extra monthly or one-off mortgage payments could change payoff time, total interest and payoff date.
- Mortgage Affordability Calculator Estimate an affordable property price from income, deposit or down payment, monthly debts, mortgage assumptions and recurring housing costs.
- Down Payment Calculator Estimate deposit or down payment amount, loan amount, loan-to-value, purchase costs and savings gap for a home purchase.
FAQs
What does this mortgage comparison calculator compare?
It compares two mortgage scenarios by payment, interest, fees, remaining balance and estimated cost over the selected period.
Should I compare over the full loan term?
You can, but many people compare over the expected holding, refinance or review period.
Why can a lower payment cost more overall?
A lower payment can come from a longer term or higher total interest over time.
How do upfront fees affect the result?
Higher fees can make a lower-rate option take longer to break even.
Does this include taxes or insurance?
No. It focuses on loan payments, interest, fees and remaining balance.
Does this account for changing rates?
No. Each scenario assumes the entered rate stays constant.
Is the lower-cost scenario a recommendation?
No. It is a comparison of the numbers entered, not mortgage advice.
How is this different from the mortgage payment calculator?
The mortgage payment calculator focuses on one loan. This tool compares two scenarios side by side.