How Did The Treatment of 9-Hole Scores Change Under The World Handicap System in 2024?

Beginning in January 2024, when a player posts a 9-hole score, the WHS™ will automatically calculate an 18-hole Score Differential™ for the round, based on the player’s 9-hole Score Differential and expected Score Differential based on their current Handicap Index®, allowing the 9-hole round to be considered in the player’s Handicap Index calculation right away.

As part of this change, golfers are required to play and post all 9 holes with a valid 9-hole Course Rating™ and Slope Rating™. Click here to watch a video by the USGA about the treatment of 9-hole scores.