True if its for long term... if 1 or 2 years.... it dosen't save much.
The interests can grow quite a hefty sum if it continues to be 0.8%-1.1% difference (HDB interests 2.6% vs estimated bank interests at 1.5%-1.8% now) for >10years... then i agree to let your CPF sit & grow interests.
But nobody can predict this. Last time my bank loan was 2.6% lock in 2 years, till floating rate, then it increased close to 4%!
If i you have been using more CPF to pay it, means i have lesser capital loan for that hefty interests isn't it?
4% is just a little episode until CPF board send me a statement informing me, you have reached your housing loan withdrawal limit. Even u have hundred thousands in CPF account, u are not allow to touch it, have to service the rest of the loan by cash to pay bank monthly (interests of 4%!)
See, if u don't use up your CPF, when u reach the limit, u want to use also cannot use... its for retirement plan.
So my 2cents thought, if you have a combine $500K in CPF, use $450K, balance $50K is not for growing the interests, is for in case u out of job still can service the home loan for a certain period.
Don't be like using $300K, keep $200K for interests grow. Because by the time u want to use this $200K, government will drop u a letter say u have reach the withdrawal limit like me.
So for me, since i cant use CPF, must pay cash monthly+interests to bank, then i chose to one shot pay bank full amount(so no more interests) to redeem back my title deed.
Have been debt free since then... but now itchy hand.. getting EC... & continue the story again...... LOL.