Does the result include mortgage-insurance premium?
No. Add the premium and payment method from the bank or insurer's written quote.
Hong Kong Mortgage Calculator
Estimate monthly payments and total interest from price, down payment, term and an assumed rate
💡 Calculation note
The HKMA suspended the former mortgage stress test that assumed a two-percentage-point rate rise from 28 February 2024. The current general debt-servicing-ratio limit is 50%. This page divides this mortgage payment by 50% only; it does not include other debts, a bank's underwriting or mortgage-insurance rules. Actual approval is subject to written bank terms. Read the HKMA circular
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Which mortgage calculation do you need?
This page estimates repayment and interest. The down-payment field is a percentage of the property price: loan principal = price × (1 − down-payment percentage ÷ 100). Enter the annual rate from your quotation; the input is not a live bank offer.
- Cash required for the purchase: down-payment calculator
- Repayment versus income: affordability calculator
- Purchase tax budget: stamp duty calculator
This section updated:
How to read the result
The calculator uses a level-payment formula and assumes the entered rate stays unchanged for the full term. For a floating-rate mortgage, compare at least the current assumption and scenarios one percentage point higher and lower.
A prudential cap is not an approval promise
The current general HKMA prudential caps are 70% LTV and 50% DSR, while the former two-percentage-point interest-rate stress-test requirement has been suspended. Banks still make their own credit decisions.
Check cash with the down-payment calculator and read the mortgage FAQ. For written comparisons, request mortgage referral information.
Frequently asked questions
Is the 50% income figure a minimum salary?
No. It only divides this mortgage payment by 50% and does not include other monthly debt obligations.
Why may the bank's total interest differ?
The tool assumes a constant rate and excludes rate resets, early repayment, rebates, fees and payment-date differences.
Can it calculate a zero-rate scenario?
Yes. At zero interest it divides the loan by the number of monthly payments; that is only a test scenario.
Official and professional sources
Disclaimer：Scenario planning only; not a bank offer, credit approval or financial advice.
Hong Kong mortgage calculator: repayment and interest formula
Let L be the loan principal, r the monthly rate (annual percentage ÷ 100 ÷ 12), and n the number of months. At a fixed rate, monthly repayment M = L × r ÷ [1 − (1 + r)−n]. Estimated total interest = M × n − L. At zero interest, M = L ÷ n.
For a hypothetical HK$1,000,000 loan at 4% for 20 years / 240 months, repayment is approximately HK$6,059.80 and total interest HK$454,352.79. This holds the rate constant and excludes fees. Bank daily-interest calculations, resets and final instalments can differ.
See the early repayment calculator (Chinese) or dedicated HOS mortgage calculator (Chinese).
This section checked: 2026-10-05