Fundamentals of Handicapping
How many scores do I have to post before I get a Handicap Index?
In order to establish a Handicap Index, a total of 54 holes must be played and posted to your scoring record. These scores can be made up of any combination of 9- or 18-hole rounds. 9-hole scores are combined in the order that they are received to form 18-hole Score Differentials that are used to calculate your Handicap Index. Once you have posted a total of three 18-hole Score Differentials, a Handicap Index will be issued to you the very next day. (Rule 4.5, Rules of Handicapping)