New value is $550,000. 80% of $550k is $440,000. But you owe $400,000 so there is an extra $40k which you could pull out (subject to servicing). You would set up a new split for $40,000. This is secured by the PPOR.
Purchase the investment property for say $300,000. Borrow 90% or $270,000 against the IP and use the LOC to pay the $30k deposit. IP loan is secured by only 1 property.
No cross collateralising of loans.
Thanks Terry. I get that - the $40,000 is essentially an open loan secured against the property; what it is used for isn't of concern to the bank. Hence using the money for a deposit is fine.
In fact, doesn't it also mean that the interest on the $30,000 deposit is tax deductible since it is being used for an IP to make income?
So not only the interest on the $270,000 is tax deductible, but the whole $300,000 is.