Neilson has been listed on the BRW Rich 200 since 2011. Following his divorce, according to the BRW his net worth fell from A$3.35 billion to A$2 billion in 2015. The most recent survey, the Financial Review Rich List, completed in 2019, assessed Neilson's net worth at A$1.49 billion.
Meanwhile, his former wife, Judith Neilson debuted on the 2015 BRW Rich 200 with a net worth of A$1.55 billion in 2015, and was assessed as having a net worth of A$1.45 billion in 2016.