HDB loan to bank loan: allowed, but irreversible
You can refinance from an HDB concessionary loan to a bank loan at any time if a bank offers a better rate. However, once you leave the HDB loan scheme, you generally cannot switch back to an HDB loan later — even if bank rates rise again.
Bank loan to bank loan: normal practice
Refinancing between banks (or repricing with your existing bank) is common and can meaningfully reduce your monthly instalment, especially once an initial fixed-rate or lock-in period ends and your package reverts to a higher rate.
What to weigh up
- Break costs or penalties if you're still within a lock-in period.
- Legal and valuation fees for the new loan (some banks offer subsidies for these).
- The stability you'd give up — HDB's rate has historically moved slowly, while bank packages can be more volatile after any fixed period ends.
- Your remaining loan tenure and outstanding quantum — refinancing savings compound more over a longer remaining tenure and larger loan.
Compare the effective all-in rate over your realistic holding period, not just the teaser rate in year one, and get the numbers in writing before you commit to switching.