Should You Drop Your HDB Loan for a 1.6% Bank Rate?

The arithmetic looks like a no-brainer. Your HDB concessionary loan charges 2.60%. A bank will write you a fixed rate near 1.60% today, or a floating one closer to 1.30%. On a $400,000 balance that gap is real money — and every refinancing broker will happily show you the savings. What almost none of them put next to it is the cost of the door you're walking through. Refinancing an HDB loan to a bank is a one-way move: once you leave, HDB will not take you back. You are trading a rate that is fixed at 2.60% for the rest of your loan for a rate that is cheaper today and unknown tomorrow. This is the honest version of that decision.

Where the two rates actually come from

The HDB concessionary rate isn't a market rate. It's pegged at 0.10% above the prevailing CPF Ordinary Account interest rate — currently 2.50% — which is how it has sat at 2.60% for years and barely moved through an entire rate cycle (HDB). It can be revised in January, April, July and October in step with CPF, but in practice it is one of the most stable borrowing rates in Singapore. That stability is the product, not a side effect.

Bank rates are the opposite. Mid-2026 pricing for HDB borrowers runs around 1.50–1.70% fixed and from roughly 1.30% floating (3M SORA plus a margin), per current board rates (PropertyNet.SG). Those rates are low because SORA is near a five-year floor — consensus has 3-month SORA bottoming around 1% in 2026 before drifting back toward 1.39% by year-end (PropertyGuru). A bank fixed rate locks that low for two or three years; after that, you reprice into whatever the cycle has become.

The saving, if rates simply stay put

Take a $400,000 HDB loan with 25 years left. Here is what each rate does to the monthly bill and the lifetime interest, holding the rate flat for the full tenure:

Switching from 2.60% to a 1.60% bank loan frees about $196 a month, or roughly $2,350 a year. If that 1.60% somehow held for the entire 25 years, the interest saving would be nearly $59,000. That is the number the savings calculator shows you, and it is the best case — it assumes a rate that is contractually guaranteed for only two years stays fixed for twenty-five.

The part the calculator hides: it's a one-way door

Two features of the HDB loan disappear the moment you refinance, and neither shows up in a monthly-payment comparison.

The first is reversibility. You can switch from HDB to a bank. You cannot switch back. HDB concessionary financing is only available at purchase or, in limited cases, before you've ever taken a bank loan on the flat. Refinance once and the 2.60% rate is gone for good — if bank rates climb, your only options are other banks. You've given up the floor permanently to capture a discount that lasts a lock-in period.

The second is what 2.60% is worth when rates rise. The concessionary rate barely moved while bank rates doubled and halved over the last cycle. It is, in effect, a capped rate for the life of the loan. A bank fixed rate is capped only until the lock-in ends — typically two years — after which you are fully exposed to the next cycle.

The scenario where the cheap rate costs more

Watch what happens if you refinance to 1.60% and the cycle turns. Suppose you enjoy two years at 1.60%, then — because SORA has normalised — your loan reprices to 3.00% for the remaining 23 years. That is not a crash scenario; 3% is roughly where many Singapore mortgages sat as recently as 2024.

The bank path saves you about $7,800 in the first two years — and then hands back more than that over the next twenty-three. You end up roughly $12,000 worse off than if you'd never moved, having also surrendered the right to return to 2.60%. The breakeven is clean and worth memorising: refinancing to a bank wins only if your average bank rate across the entire remaining tenure stays below 2.60%. Today's rates clear that bar with room to spare. The question is whether they will for the next two decades, and nobody selling you a refinance is underwriting that bet.

So who should actually switch

The decision turns less on today's gap than on your time horizon and your appetite for managing the loan.

Switching makes sense if your remaining tenure is short — say, under ten years — so the cheap rate does most of its work before the next cycle can spoil it; or if you're confident you'll sell or fully repay within a few years and just want the lowest cost in the interim. Over a short horizon the rate-rise risk has little time to bite, and the saving is close to guaranteed.

Staying makes sense if you have a long tenure left and value not thinking about your mortgage. The 2.60% is a set-and-forget rate with no lock-in, no refinancing fees every two years, and no exposure to the next SORA spike. For a household that would not reliably reprice every cycle — and most won't — the certainty is worth more than the headline discount.

There is also a middle path people forget: you can make voluntary partial repayments on the HDB loan to cut the 2.60% interest without giving up the loan itself. That captures part of the saving while keeping the floor. It's slower than a bank's headline rate, but it's reversible in a way refinancing never is.

The bottom line

A 1.60% bank rate genuinely beats 2.60% — right now, on this month's board. But an HDB loan isn't priced for right now; it's priced for the whole cycle, and it's the only home loan in Singapore you can't get back once you leave it. Switch if your horizon is short or your discipline is high. If it isn't, the boring 2.60% that never surprises you may be the better deal precisely because it never surprises you.

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General information only, not financial advice. The HDB concessionary rate (2.60%, pegged 0.10% above the 2.50% CPF OA rate) and indicative bank board rates (~1.50–1.70% fixed, from ~1.30% floating for HDB loans) are as at June 2026 and change without notice. Eligibility to take or keep an HDB concessionary loan, lock-in terms, refinancing fees and partial-repayment rules vary — verify current terms with HDB, your bank, and MAS before acting.