A Handicap Index shows your potential, not your average: under the World Handicap System it is the average of your best 8 Score Differentials from your most recent 20 scores. [1]
The four numbers that build your handicap
| Term | What it is |
|---|---|
| Adjusted Gross Score | Your score after capping each hole at net double bogey |
| Course Rating | What a scratch golfer is expected to shoot on that course |
| Slope Rating | How much harder the course plays for a bogey golfer than a scratch golfer (113 is standard) |
| PCC | Playing Conditions Calculation: a daily adjustment if scores were unusually high or low |
Definitions summarised from the USGA Rules of Handicapping [2].
Index vs Course Handicap
Your Handicap Index travels with you. On a given course you convert it to a Course Handicap: Index × (Slope ÷ 113) + (Course Rating − Par). [2] So a 12.0 Index on a 130-slope course rated 72.5, par 72, gives 12.0 × 1.150 + 0.5 = 14.3, which rounds to 14.
Safeguards in the system
- Soft cap and hard cap: if your Index rises more than 3.0 above your lowest Index of the past year, further increases are halved; it can't rise more than 5.0 above it. [2]
- Exceptional scores: a round 7+ strokes better than your Index triggers an extra reduction.
- Fewer than 20 scores: a sliding table applies (see our handicap calculator). [3]
Does your handicap change what you should buy?
Roughly, yes: higher handicaps usually gain more from forgiving drivers and soft, low-cost balls than from tour equipment. See the driver buying guide and best golf balls for beginners.
FAQ
How do handicaps work in golf?
Your Index is the average of your best 8 Score Differentials from your last 20 rounds. On a course it converts to a Course Handicap — the strokes you receive.
What is the maximum golf handicap?
54.0 under the World Handicap System.
How is a Score Differential calculated?
(Adjusted Gross Score − Course Rating − PCC) × 113 ÷ Slope Rating.
What is net double bogey?
The maximum hole score for handicap purposes: double bogey plus any handicap strokes you get on that hole.
Sources
- USGA — FAQs: how is a Handicap Index calculated
- USGA — Rules of Handicapping (effective 2024)
- USGA Rules of Handicapping — Rule 5.2a, fewer than 20 scores