Mortgage Calculator
Enter a home price, down payment, interest rate, and loan term to get your estimated monthly payment, total interest paid, and a full month-by-month amortization schedule showing principal versus interest over time.
All calculations happen on your device — no financial figures are sent to a server.
For informational purposes only — not financial advice or an actual offer from any lender.
What this tool does
Calculates a mortgage's monthly payment from the property price, deposit, rate and term, separating principal and interest from property tax and insurance so you see the real monthly total.
When to use it
- Working out what you can afford before house-hunting.
- Comparing what a larger deposit does to the payment.
- Wanting the true monthly total including tax and insurance rather than the bank's payment alone.
- Comparing different mortgage terms.
How to use it
- Enter the "Property price" and "Down payment".
- Enter the "Annual interest rate %" and "Loan term (years)".
- Enter the "Annual property tax" and "Annual insurance" for the true total.
- Click "Calculate mortgage" and read the breakdown.
A practical example
Input
A property price with a deposit, an annual rate and a 20-year term, plus annual tax and insurance.
Output
The loan amount, the principal-and-interest payment, the monthly tax and insurance, the total monthly payment, and the total interest over the term.
Limitations
- This is for information only and is not financial advice or an actual offer from any lender.
- The deposit must be less than the price and the term greater than zero, and you get a message if not.
- It excludes registration, valuation, broker and closing costs, which are substantial in a property purchase.
- It assumes a fixed rate; variable-rate mortgages change their payment over time.
Privacy and processing
All calculations happen on your device and no financial figures are sent to a server.
Technical notes
- Separating principal and interest from tax and insurance is deliberate, because the bank lends against the former while the latter is a real monthly obligation on you.