This season marked the first NBL season that featured the New Zealand Breakers, the first New Zealand team in the Australian competition.

Also, the Canberra Cannons were replaced by the Hunter Pirates.

The 2003–04 regular season took place over 22 rounds between 1 October 2003 and 29 February 2004.

Updated to match(es) played on 29 February 2004.

Source: NBL.com.au The NBL tie-breaker system as outlined in the NBL Rules and Regulations states that in the case of an identical win–loss record, the results in games played between the teams will determine order of seeding.