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Refinance / Cash-out Calculator

Compare your existing mortgage with a new offer, calculate the rate spread, cash rebate and refinance costs, and assess whether refinancing or cashing out is worthwhile.

Refinance parameters

HK$ 3,000,000
4.1%
20 year
3.5%
20 year
HK$ 20,000
HK$ 15,000
HK$ 8,000
HK$ 2,500

Net benefit

HK$229,418

Total savingsHK$234,918 Total costsHK$5,500

Current monthly repayment

HK$18,378

New monthly repayment

HK$17,399

Monthly saving

HK$979

Total savings

HK$234,918

Total costs

HK$5,500

After cashback deduction

Break-even months

6months

Break-even period

Is it worthwhile?

Worth refinancing

Monthly repayment falls by HK$979 after refinancing; net gain after costs is HK$229,418, about 6 months to break even.

Rate spread

0.63%

Current interest rate minus new interest rate

Monthly repayment falls by HK$979 after refinancing; net gain after costs is HK$229,418, about 6 months to break even.

Understanding Refinancing and Cash-Out Refinancing

Refinancing means transferring an existing mortgage to another bank to obtain a better interest rate, cash rebate or cash-out funds. Cash-out refinancing means increasing the mortgage loan amount on an existing property to turn the appreciated value into cash. Both are common financial tools for Hong Kong homeowners and can reduce mortgage costs or unlock property equity for other purposes such as renovation, investment or working capital.

The biggest attraction of refinancing is the cash rebates and low-rate offers banks use to win customers. Some Hong Kong banks currently offer cash rebates equal to a percentage of the loan amount and waive certain fees. However, refinancing involves legal fees, valuation fees and early repayment penalties, so you must calculate carefully whether it is worthwhile. Cash-out refinancing requires sufficient remaining equity in the property and must meet the bank's debt servicing ratio requirements.

HK FinBox's refinancing / cash-out refinancing calculator lets you enter your existing mortgage balance, property valuation, new interest rate, cash rebate, fees and cash-out amount to calculate the change in monthly payments after refinancing, the cash released and the total savings. The calculator helps you fully assess the financial impact of refinancing or cash-out refinancing.

Before refinancing, check the penalty period with your existing bank; refinancing within the penalty period may cost several months' interest. Also, if the cash rebate exceeds a certain percentage of the loan amount, the HKMA may require it to be deducted from the loan amount. Compare terms from several banks and weigh the interest savings against all costs.

References

Rules and links last reviewed: 26 July 2026 · The sources above are for reference only; please refer to the latest official announcements from the relevant organisations.

FAQs

What is refinancing?

Refinancing is transferring an existing mortgage to another bank to obtain a better interest rate, cash rebate or cash-out funds.

What is the difference between cash-out refinancing and refinancing?

Refinancing means switching the lending bank. Cash-out refinancing means increasing the loan amount with the original or a new bank to unlock the property's appreciated value as cash.

What costs are involved in refinancing?

Refinancing may involve legal fees, valuation fees, early repayment penalties and related administrative charges. These should be compared against the interest savings and rebates.

Is the cash rebate received directly?

Not necessarily. If the cash rebate exceeds a certain percentage of the loan amount, the bank may deduct it from the loan amount as required.

When is refinancing suitable?

Refinancing may be considered when the penalty period of the existing loan has passed and the new bank's rate and rebates can cover the refinancing costs and produce net savings.

Client-side only: All data is calculated on your device and is not uploaded to any server. Results are for reference only and do not constitute professional financial or legal advice.