It is very hard to advice you without knowing the full information
1) What's your income level?; What kind of expenditure / savings you are deriving from it?; How comfortable you are able to service the monthly installment now and in the event of a retrenchment?
My assumption
- My guess is that you are SG and combine income >S$14k.
- Depending on the loan tenor, you and your wife's CPF should be able to service the monthly installment for S$500k loan
2) Cash Savings / Liquid assets (investments)
My assumption:
- You should have quite a bit of Liquid cash and investment as you seem to be financially prudent and pick HDB even with your combine income.
- Basically at mid-40s, good to have at least 12-24 months of standby for housing loan installment, which can be in terms of your liquid investments. If not, useful to have it in CPF OA and to find higher bearing instruments for it.
3) Terms & Conditions of the Housing loan
- Are rates fixed?; Able to prepay anytime or up to certain percent?
4) What's your intention for the remaining S$300k CPF If you take a S$500k loan?
- Is the bulk of your cash invested? or getting better returns than CPF OA?
- What is your risk and investment appetite? (e.g. current investment/cash portfolio and returns you are getting)
*Do also take note that if you intend to use CPF OA for T-Bills or FDs, the effective rate is lower and you lose 1 month of CPF OA rates
https://financialhorse.com/t-bills-...y-than-singapore-savings-bonds-fixed-deposit/
For me, i will probably prepay a bigger loan amount given my target return for CPF OA is around 4%. At 3.75% it is rather close to my required return. Higher return is possible but will also depend on market condition which is currently rather volatile.