How the payment is calculated
For a fixed-rate loan, the principal-and-interest payment is P × r × (1 + r)^n ÷ ((1 + r)^n − 1). P is the loan amount, r the annual rate divided by twelve and one hundred, and n the total number of monthly payments. At zero interest, the payment is principal divided by payment count.
The displayed housing total adds annual property tax divided by twelve, annual insurance divided by twelve and monthly condo or HOA fees. The CFPB explains why mortgage principal and interest differ from a household’s total payment; use your lender’s documents to identify what is actually collected.
A worked monthly-payment example
A 100,000 loan at 6% over thirty years produces approximately 599.55 of monthly principal and interest in this model. Entering 1,200 annual property tax, 600 annual insurance and no HOA fee adds 150 a month, producing an estimate of about 749.55.
Those property-cost inputs are examples, not local quotes. Compare the same loan terms when evaluating two offers; a lower monthly payment can also reflect a longer amortization, which changes total interest.
Costs and rules outside this estimate
The total excludes mortgage insurance unless you include it in your insurance input, and excludes utilities, repairs, maintenance, closing costs and special assessments. Taxes and insurance can change. A fixed principal-and-interest payment does not freeze the entire cost of homeownership.
This is a generic monthly-compounding model. Canadian quoted mortgage rates may use different compounding conventions, and a Canadian mortgage term can be shorter than its amortization. Variable-rate terms, renewals, prepayment penalties and lender rounding require a lender-specific calculation. Do not use this page as a mortgage approval or affordability decision.
Questions readers often ask
Does the result include property taxes?
Yes, when you enter them. Annual property tax is divided by twelve and added to the monthly estimate.
Does it include PMI or mortgage insurance?
Not separately. Include applicable insurance in your insurance input and verify the lender’s schedule.
Does a reporting currency change the mortgage convention?
No. Currency changes the unit label, not compounding rules or jurisdiction.
Is this the maximum home price I can afford?
No. It estimates payments from entered values, without assessing income, credit or other obligations.
Keep the result in context
The calculator uses simplified assumptions. It does not retrieve market prices, personalized tax rates or lender terms. Verify important inputs and revisit the estimate when circumstances change.
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Reference: CFPB: principal and interest versus total mortgage payment.