Switching from an HDB loan to a bank loan can reduce borrowing costs when a bank’s all-in rate is lower. But the headline rate is only one part of the decision. A fair comparison must include lock-ins, fees, future rate resets, repayment flexibility and one irreversible rule: after refinancing an HDB loan with a bank, you cannot refinance that loan back to HDB.
As at 16 September 2026, the HDB concessionary interest rate is 2.6% per annum for 1 July to 30 September 2026, according to the CPF Board’s dated quarterly announcement. It is pegged 0.1 percentage point above the CPF Ordinary Account (OA) rate and reviewed quarterly. This article does not quote a promotional bank rate because packages can change quickly and differ by loan size, tenure, property and borrower profile.
What changes when you move from HDB to a bank
An HDB concessionary loan has a policy-linked rate that has been stable in practice, no lock-in period and no HDB penalty for partial or full early repayment. A bank mortgage is a private contract. It may have a fixed rate for a stated period, a floating rate linked to a benchmark such as compounded SORA, or a staged structure. A “fixed” package is usually fixed only for the period in the letter of offer, not for the mortgage’s entire remaining tenure.
With a floating package, the all-in rate normally combines the applicable benchmark and the bank’s spread. The reset schedule, observation period and spread matter as much as today’s benchmark. Our guide to SORA-linked home loans explains how the benchmark, spread and reset timing work together.
The biggest structural difference is reversibility. HDB’s refinancing guidance confirms that an owner may refinance an HDB housing loan with a financial institution, but cannot subsequently refinance that loan with HDB. You may later reprice with the same bank or refinance to another bank, subject to approval and contractual terms, but the HDB route is closed.
Compare total cost, not just the opening rate
Start with the same outstanding balance, remaining tenure and repayment basis for every option. Ask each bank for the promotional rate, the rate after the promotional period, the benchmark and spread, the lock-in end date, and a repayment schedule. Then compare interest over the period you realistically expect to keep the package—not an assumed best-case rate over the full loan term.
Add every switching cost: legal and conveyancing fees, valuation or administrative charges, mortgage insurance changes, and any subsidy clawback. Some banks offer cash rebates or legal subsidies, but these may have their own clawback period. A rebate reduces cost only if you satisfy its conditions.
A useful break-even test is straightforward: estimate the interest saved over your intended holding period, then subtract all switching costs and likely penalties. Test at least three paths for a floating package: the benchmark stays similar, falls, or rises. If modest rate changes erase the benefit, the proposed switch has little margin of safety. Also compare the bank offer with keeping the HDB loan and making penalty-free partial repayments, if spare cash is available.
Understand lock-ins and future flexibility
Bank lock-ins commonly restrict full redemption, refinancing and sometimes partial prepayment. The exact penalty, permitted annual prepayment amount and exceptions must come from the letter of offer. Check whether a sale during the lock-in attracts a penalty and whether the package includes a sale waiver. Do not rely on a verbal summary.
Look beyond the first fixed period. Ask what rate applies afterwards, whether you can reprice internally, what conversion fee applies and whether repricing begins a new lock-in. A low initial rate can be poor value if the thereafter formula is expensive or if the package makes an expected sale costly.
Refinancing also depends on future approval. A later bank may reassess income, age, credit, property value and remaining lease. No borrower is guaranteed another attractive package when the current lock-in ends. Keeping the HDB loan therefore has option value for owners who prioritise uncomplicated prepayment or expect uncertain income.
Check approval, tenure and cash-flow resilience
A lower advertised rate does not guarantee approval. The bank conducts its own credit assessment and can impose a minimum loan size or shorter tenure. Under the MAS refinancing framework, the maximum duration for a refinanced HDB-flat loan is 30 years minus the number of years since the first housing loan was disbursed. MAS states that there is no regulatory loan-to-value limit specifically on a refinanced housing loan, but the financial institution may lend only after applying its credit criteria.
Approval is not the same as affordability. Stress-test the instalment at rates above the initial offer and allow for income interruption, family expenses and other debt. Keep enough cash and/or CPF OA savings to cover several months of essential outgoings. A small expected saving is not worth leaving the household unable to absorb a reset or emergency.
Timing matters too. Match completion to the bank’s rate-validity period and any planned sale or major prepayment. Obtain a current HDB loan statement and ask the bank or its lawyer for a written completion timeline and itemised redemption amount before committing.
Decide how CPF OA should be used
CPF OA savings can be used for eligible bank housing-loan instalments, subject to CPF housing rules and limits. The CPF Board’s housing guidance also allows homeowners to start, change or stop CPF payments for a bank loan and encourages a balance between housing use, an emergency buffer and retirement needs.
Using CPF may ease monthly cash flow, but it has an opportunity cost: withdrawn OA savings no longer earn OA interest. When the property is sold or transferred, the CPF principal used and accrued interest generally have to be refunded from the sale proceeds after the housing loan is repaid. Accrued interest goes back to your own CPF account; it is not a bank fee.
Refinancing does not by itself remove that CPF refund obligation. Review your CPF housing dashboard and decide whether to service the new loan with cash, CPF or a mixture. The right balance depends on liquidity, retirement plans and expected sale timing. Our guide to keeping a CPF OA housing buffer covers this trade-off in more detail.
When switching may—or may not—make sense
A bank loan may suit an owner whose verified savings remain meaningful after all costs, who can tolerate rate resets, who does not need HDB’s repayment flexibility and who has sufficient reserves. It can also make sense when the package’s lock-in fits the household’s likely holding period and prepayment plans.
Staying with HDB may be better when the net saving is small, a sale or large prepayment is likely, income is volatile, or certainty matters more than the lowest available opening rate. It may also be preferable when the outstanding balance is too small for fees to be recovered comfortably.
Before signing, collect written offers from more than one bank and compare them on one worksheet. Record the all-in rate and reset formula, monthly instalment, total interest for the intended comparison period, one-off costs, rebates and clawbacks, lock-in penalties, sale waiver, prepayment rights and thereafter rate. Read the letter of offer and ask for clarification on any term that is not explicit.
The decision should survive a higher-rate scenario and still leave an emergency buffer. If it works only because today’s promotional rate is assumed to last indefinitely, it is not a robust refinance. The best choice is the one with acceptable total cost and risk—not automatically the loan with the lowest opening number.
