4 innings are considered a complete game.
5 innings need to be played for a game to be official in a 9 inning game. Actually, 4 1/2 innings need to be completed if the home team is ahead, 5 innings if the home team is behind to make it an official game.
In a nine inning game, to become an official game, it must go 5 1/2 innings if the home team is ahead, or 6 complete innings if the home team is behind.
a lot of money