Re: Using cash to pay for housing installments
For those unaware, the common advise to use your liquid cash to generate similar or better interest rates ONLY APPLY if you invest the SAME AMOUNT as your outstanding loan, otherwise your interest yield will not cover. It's basic math:
Owe $1m @ 1.5% interest = Invest $1m @ 1.5% interest
Owe $1m @ 1.5% interest = Invest $0.5m @ 3% interest
Owe $1m @ 1.5% interest = Invest $0.1m @ 15% interest
So unless you have the cash to play, investing does not work. On the contrary I would say it is easier to save that amount, i.e. cut back your spending than to try to invest more money to cover the interests. Usually I see people earn more will end up spending more. Natural cycle.
BY THE WAY - If you pay housing using CPF, you incur an interest with CPF board. When you sell your property, you need to pay back the amount you took out from CPF *plus interest*. The interest rate if I am not wrong is same as the prevailing OA interest rate. If you want to know how much you owe CPF board, just login using your SingPass. There is a screen that shows you how much you took out, and how much interest you incurred.
As for the answer to your question, CPF money you cannot touch until almost going to die, so IMHO rather just use max CPF, min cash to pay your property and let your current installments plan roll. Until such a day you find that you have sufficient cash to completely pay off the property and still have enough liquidity in cash, then you go ahead and do so.
Otherwise, keep the cash in your bank. Some debts aren't bad, especially if it is going into an asset. Cashflow more important.
P.S. I am not a banker. I am an engineer. A banker won't tell you all these. They will tell you to invest, invest, invest. Invest until you lao sai and pok gai, still tell you to invest.