2005–06 New Zealand Football Championship
|Oceania Club Championship||Auckland City,
|Goals scored||326 (3.62 per match)|
In the regular season, all teams played each other three times, as before. But the playoff stage was changed slightly, with the top five teams now going through to the playoffs (as opposed to the previous three).
||Qualification or relegation
|1||Auckland City (C)||21||16||0||5||63||28||+35||48||Qualified for the 2006 OFC Club Championship|
|3||Canterbury United||21||13||2||6||36||22||+14||41||2006 New Zealand Football Championship Finals|
|8||Hawke's Bay United||21||1||2||18||17||63||−46||5|
In this season's extended playoff system, the games are broken up into several rounds.
The second place team plays the third place team in Game 1; and fourth place plays fifth place in Game 2. The second and fourth placed teams get home advantage. The winners of each game progress to Round 2, as does the loser of Game 1. The Game 2 loser is eliminated.
Auckland City, as Premiers, receive a bye straight to Round 2 where they face the winner from Game 1. The loser of Game 1 gets a second chance by going into Round 2 to face the Game 2 winner.
The winner of Game 3 (Auckland) now goes into the Grand Final - and with home advantage. The loser of Game 3 (Canterbury) gets a second chance to make the Grand Final by playing the winner of Game 4 (Wellington). The Game 4 loser is eliminated.
Canterbury, as winners, go on to face Auckland City in the Grand Final.
Auckland City are the champions of the 2005–06 New Zealand Football Championship and, along with league runners up YoungHeart Manawatu, will go on to represent New Zealand in the Oceania Club Championship 2006