Which refinance are you actually doing?
Two quite different decisions get called "refinancing an HDB flat", and they carry completely different risk.
| Bank to bank | HDB loan to bank | |
|---|---|---|
| Reversible? | Yes — refinance again any time | No. Permanent for that flat |
| Lock-in to escape | Usually 1–3 years | None |
| Prepayment penalty | 0.75%–1.5% during lock-in | None |
| Rate you are leaving | A market rate | 2.6%, pegged to CPF OA |
| Risk if rates rise | Normal refinancing risk | You cannot go back |
| Decision horizon | The package period | The remaining tenure |
Everything below about costs and timing applies to both. The one-way warning applies only to the second.
Why is leaving the HDB loan permanent?
Because the HDB concessionary loan is only available to eligible buyers at the point of financing a flat. Once a flat has been refinanced to a bank, HDB does not take the loan back. The 2.6% rate is gone for that property for as long as you own it.
That changes the arithmetic completely. An ordinary refinance is a two-year decision — if it goes wrong you move again. This one is a twenty-year decision made on two years of information.
The HDB rate is pegged at 0.1% above the CPF Ordinary Account rate, currently 2.5%. It does not move when SORA moves. That is not a low rate by accident — it is a rate that stops being a decision.
Does leaving the HDB loan ever pay?
Run it the wrong way round to see the shape. Take S$350,000 outstanding over 20 years at the HDB rate of 2.6%, and move to a bank package at 3.1%. The instalment goes from S$1,872 to S$1,959 — that is S$87 a month more, not less, plus fees.
For the move to pay at all, the bank rate has to be meaningfully below 2.6% and stay there. In a market where two-year fixed rates sit above 3%, that is not the situation. It has been the situation before and may be again — but you would be committing permanently on the basis of a two-year package.
| Leaving HDB (2.6% → 3.1%) | Bank to bank (4.0% → 3.1%) | |
|---|---|---|
| Current instalment | S$1,872 | S$2,121 |
| New instalment | S$1,959 | S$1,959 |
| Monthly change | +S$87 | −S$162 |
| Verdict | Worse | Worth doing |
| Reversible | No | Yes |
What do you gain by moving to a bank?
The case is not empty, and it is worth stating fairly. Bank packages can price below 2.6% in a low-rate environment, and some borrowers value the flexibility of choosing their own structure — a longer fixed period, a split package, a specific lender relationship.
There is also a group for whom the HDB loan was never available: households above the income ceiling, or those who have owned private property recently. For them the question does not arise, and an ordinary bank-to-bank refinance is simply the normal decision.
Does MSR apply when I refinance a flat?
The Mortgage Servicing Ratio caps the housing instalment on an HDB flat at 30% of gross monthly income, and it is tighter than TDSR for most buyers. It applies to new HDB loans and to bank loans on HDB flats in the ordinary way.
On refinancing specifically, MAS exempts owner-occupiers from the TDSR threshold, and the same table that states this shows the MSR limit alongside it. If you live in the flat, refinancing does not put you back through the ratio test.
Different from a purchase, where MSR is usually the binding constraint on how much flat you can buy. See the HDB loan calculator for that side of it.
What does it cost and how long does it take?
The same as any refinance: roughly S$1,800–3,000 in legal fees and S$300–800 for valuation, often partly covered by a bank subsidy that is clawed back if you move again within about three years.
Leaving the HDB loan has one advantage on timing — there is no lock-in period to wait out and no prepayment penalty, so you can move whenever it suits. Bank-to-bank on a flat carries the usual three months' notice and the usual lock-in considerations.
Work out your own number
Refinance Break-Even Calculator
Enter 2.6% as your current rate to see what leaving the HDB loan actually does to your instalment.
Open the calculator →Frequently asked questions
Can I refinance my HDB loan to a bank loan?
Yes, at any time — the HDB concessionary loan has no lock-in and no prepayment penalty. But the move is permanent: once the flat is refinanced to a bank you cannot return to the HDB concessionary rate on that property.
Can I switch back from a bank loan to an HDB loan?
No. HDB does not take the loan back once a flat has been refinanced to a bank. This is the single most important fact about refinancing an HDB flat and the reason the decision deserves a twenty-year view rather than a two-year one.
What is the HDB concessionary loan interest rate?
2.6% per annum, pegged at 0.1% above the CPF Ordinary Account rate of 2.5%. It is reviewed quarterly but the peg has held for many years, and it does not move when SORA or bank pricing moves.
Is it worth refinancing from HDB to a bank?
Only if bank rates are meaningfully below 2.6% and you are confident about managing repricing for the rest of the tenure. On S$350,000 over 20 years, moving from 2.6% to a 3.1% bank package raises the instalment by about S$87 a month before fees — and you cannot undo it.
Can I refinance an HDB flat from one bank to another?
Yes, and this is an ordinary refinance with no one-way risk. If you are already on a bank loan for your flat, the normal calculation applies: compare the rate, the fees and the lock-in, and check whether repricing with your current bank is cheaper.
Does MSR apply when refinancing an HDB flat?
The Mortgage Servicing Ratio caps the housing instalment at 30% of gross monthly income on an HDB flat. On refinancing an owner-occupied home, MAS exempts the borrower from the TDSR threshold, and the same guidance covers the MSR limit — so living in the flat means you are not put back through the ratio test.
What is the current HDB refinance interest rate?
That depends on which bank you move to and what they are pricing at the time. We do not publish per-bank refinance rates because they could not be confirmed on the lenders' own pages. Get the quote from the bank and put it into the break-even calculator against your current 2.6%.
Do I pay a penalty for leaving the HDB loan early?
No. The HDB concessionary loan has no lock-in period and no prepayment penalty, so partial or full repayment is free at any time. The cost of leaving is not a fee — it is giving up the rate permanently.
Sources
Every rate on this page was read directly from IRAS on . Stamp duty rules change with little notice — confirm against IRAS before you commit to a purchase.
- ↗ MAS — Who TDSR applies to, including the refinancing exemption
- ↗ HDB — Housing loan from HDB
- ↗ MAS — SORA benchmark rates
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