5.1a For an 18-hole Score

An 18-hole Score Differential is calculated as follows and rounded to the nearest tenth, with .5 rounded upwards:

Score
Differential 		= (113 ÷
Slope Rating)		 x (adjusted gross score –
Course Rating – PCC adjustment)

Note: The PCC adjustment ranges from -1.0 to +3.0 (see Rule 5.6 Playing Conditions Calculation).

Incomplete 18-hole Round

If fewer than 18 holes have been played but more than 9 holes, an 18-hole score is only acceptable for handicap purposes if the reason for not completing the round was considered valid (see Rule ).

  • If the reason was considered valid, an 18-hole Score Differential is created using the player’s expected score for the hole or holes not played (see Rule ).

  • If the reason was considered invalid, the score is not acceptable for handicap purposes. However, depending on the circumstances, the Handicap Committee may consider applying a penalty score (see Rule ).

For an 18-hole score to be acceptable for handicap purposes over a course which consists of fewer than 18 holes, a Course Rating and Slope Rating must be issued over 18 designated holes. The calculation of an 18-hole Score Differential is carried out using the normal procedures as set out within the Rules of Handicapping.