Duty on mortgages for owner occupied housing was abolished on 1 September 2007.
Owner occupied housing
From 1 September 2007, mortgage duty will not be chargeable if the mortgage secures an advance or advances made for the purpose of owner occupied housing and no other advances. Borrowers must be natural persons.
Where the mortgagor is also a natural person, the mortgage can be registered without having to be stamped by the Office of State Revenue (OSR).
Investment housing
From 1 July 2008, mortgage duty is not chargeable if the mortgage secures an advance or advances made for the purpose of investment housing and no other advances. Borrowers must be natural persons.
1 July 2009
Mortgage duty is abolished.
NSW mortgage duty will not be chargeable on advances made on or after 1 July 2009.
More detail at the OSR website