Fundamentals of Handicapping
My Handicap Index changed under the World Handicap System. Why?
Starting in 2020, your Handicap Index is based on the modernized Rules of Handicapping and is more responsive to good scores by averaging your eight best scores out of your most recent 20. Under the previous USGA Handicap System, the best 10 of 20 scores with a .96 multiplier was used. In most cases for golfers in the U.S., any change to the Handicap Index was minimal, i.e., tenths of a stroke. (Rule 5.2, Rules of Handicapping)