This mortgage calculator estimates a periodic payment and the total repayment cost for a repayment mortgage. Enter the property price, deposit, interest rate, and loan term to compare a simple principal-and-interest scenario.
The result is a planning estimate. Actual offers can include taxes, insurance, fees, points, variable-rate changes, rounding, and lender-specific rules that are not represented by a basic calculator.
A mortgage payment is the scheduled amount paid toward a home loan. In a standard amortizing loan, each payment includes interest and a portion of principal, so the balance gradually decreases when payments are made as agreed.
The total cost depends on the amount borrowed, annual interest rate, payment frequency, term, and any additional charges. A lower monthly payment can still produce a higher total interest cost when the term is longer.
M = P × r × (1 + r)^n / ((1 + r)^n − 1)The periodic rate is the annual rate converted to the payment period. The formula assumes a fixed rate, regular payments, and a fully amortizing balance.
Total interest = total payments − principalThis estimate excludes fees, taxes, insurance, penalties, and other costs unless they are entered separately.
When the rate is zero, the principal is divided by the number of payments. A real lender may use different rounding and accrual conventions.
What is the payment for a home priced at 300,000 with a 20% deposit?
How does a 30% deposit change the scenario?
What changes when a 15-year term replaces a 30-year term?
How can two interest rates be compared?
Does this standard calculation model an interest-only period?
What happens if an extra amount is paid each month?
Use the payment to compare scenarios, not to establish affordability by itself. A household budget should also account for taxes, insurance, maintenance, utilities, association charges, and an emergency reserve.
Compare total interest as well as the monthly figure. Ask the lender for the annual percentage rate, fee schedule, repayment assumptions, and whether the rate can change.
Using the advertised rate without checking fees, points, eligibility, or whether it is fixed for the full term.
Treating principal and interest as the complete housing cost.
Comparing loans with different terms or payment frequencies without normalizing the assumptions.
Borrowing the maximum estimated amount without considering income changes, reserves, and rate risk.
This tool is not a lending decision, credit assessment, financial recommendation, or guarantee of approval. It does not know your income, credit history, local taxes, insurance, legal costs, or lender policies.
Confirm an offer with a regulated lender or qualified adviser. Do not share sensitive financial credentials in a calculator form, and do not commit to a loan based only on this estimate.
Usually not unless the tool has separate fields. Treat the displayed amount as principal and interest and add local ownership costs separately.
No. A lender may use different rates, rounding, fees, payment dates, and approval conditions.
A larger deposit generally reduces the principal and may reduce the payment or insurance requirement, but lender rules differ.
A longer term spreads repayment over more periods. It may lower each payment while increasing the total time that interest accrues.
It is a loan whose interest rate can change under stated rules. A fixed-rate calculator does not predict future adjustable payments.
Use one currency and consistent units for each scenario. The calculator does not convert a payment into affordability across countries.
Only if the calculator supports them. Otherwise use a detailed amortization schedule and check whether the contract allows penalty-free overpayments.
Ask about the annual percentage rate, fees, fixed period, total repayment, early repayment rules, taxes, insurance, and circumstances that can change the payment.
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