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Mortgage Calculator

Compare equal-instalment and equal-principal repayment, add a housing-fund loan, see the full amortisation table and test an early repayment.

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Equal instalment

—Every month
—Total interest
—Total repaid

The same amount every month. Easier to budget, and the usual default at Chinese banks.

Equal principal

—First month
—Total interest
—Total repaid

Starts at {first} and falls by about {step} a month, ending at {last}. Costs less interest overall but more in the early years.

Monthly payment over time

Early repayment — what if?

—Interest saved
—New remaining term
—Balance at that point

Calculated on the equal-instalment schedule. Banks usually require the lump sum to be a multiple of 10,000 and may charge a fee within the first few years — check your contract.

Full repayment schedule
No.PaymentPrincipalInterestBalance

How to use the mortgage calculator

  1. Enter the loan amount, the term in years and the annual rate — the two repayment methods are worked out side by side straight away.
  2. Switch to Commercial + housing fund if you have a combined loan, and give each part its own amount and rate.
  3. Open the schedule to see every month's principal and interest, and use the early-repayment box to see how much a lump sum would save.

FAQ

Equal instalment or equal principal — which is cheaper?

Equal principal always costs less interest, because you pay the balance down faster. On a 1,000,000 loan over 30 years at 3.1% the difference is roughly 71,000. The trade-off is that the first payment is about 25% higher, so it only helps if your income can carry the early years.

Is it worth repaying early?

The saving depends far more on when you repay than on how much. A lump sum in the first third of the term removes interest that would have accrued for decades; the same money paid in the last years saves very little, because by then most of each payment is principal.

Why does my bank's number differ by a few yuan?

Banks round each instalment to the cent in slightly different ways, adjust the final payment to clear the balance exactly, and may start interest from the drawdown date rather than a whole month. Treat this as a close estimate, not the contract.

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