Mortgage Calculator
The real monthly cost, not just principal and interest.
Mortgage Calculator estimates the full monthly cost of a home loan: principal and interest, plus property tax, insurance, HOA fees and mortgage insurance. It shows the deposit, the loan-to-value ratio, total interest over the term, and a payment schedule. All calculation is local.
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Runs entirely on your device. No file or text you enter here is uploaded. How to verify it.
How to use Mortgage Calculator
- Enter the property price, deposit, rate and term.
- Add property tax, insurance and any HOA or PMI amounts.
- Read the full monthly cost and the amortisation breakdown.
Questions about Mortgage Calculator
Why is my quoted payment higher than the principal-and-interest figure?
Because lenders escrow property tax and insurance into the monthly payment. Those often add 20-30% on top of principal and interest, which is why a calculator that omits them badly understates the real cost.
What is mortgage insurance and when does it stop?
It protects the lender when the deposit is below 20% of the value. In the US, PMI can usually be cancelled once the loan balance reaches 80% of the original value, and drops automatically at 78%. Rules differ by country and product.
Does it handle overpayments?
Yes, and the effect is large. On a 25-year loan, a modest monthly overpayment from the start typically cuts several years and a substantial share of the interest, because it attacks the balance while the interest share of each payment is highest.
Does it work for UK, Canadian or Australian mortgages?
The arithmetic is the same everywhere — principal, rate, term and any escrowed costs. What differs is the compounding convention: Canadian fixed-rate mortgages compound semi-annually rather than monthly, so a payment from here reads slightly high for Canada. UK and Australian monthly-compounding loans match.
Is anything I type sent anywhere?
No. The price, deposit and rate stay in the browser tab — there is no upload, no account and nothing written to local storage. Close the tab and the figures are gone, which is the point when the numbers describe your finances.
Is Mortgage Calculator really free, with no limits?
Yes. There is no account, no daily cap, no file-size tier and no watermark, because there is no server cost to recover. The site is funded by clearly disclosed partner recommendations on the Partners page, never by metering the tools.
Are my files or text uploaded when I use Mortgage Calculator?
No. Everything is processed by JavaScript running in your browser, on your device. You can verify it: open your browser's developer tools, switch to the Network tab, and use the tool. You will see no request carrying your data — because there is nowhere for it to go.