Golf ScoutWhy did my handicap go up after a good round?
Your Handicap Index is the average of your best 8 differentials from your last 20 scores. Each new score pushes the oldest of those 20 out, and if that old score was one of your best 8 and your new one isn't quite as good, your index goes up. The soft and hard caps limit how far it can rise: 3.0 above your lowest index of the last year before the rise is halved, and never more than 5.0.
The score that left your record
Your Handicap Index uses only your last 20 scores. When you hand in a new one, the oldest drops off the end. So every update is a swap: one new score in, one old score out. If the score that left was one of your best 8, the index loses it, whether or not your new round was good.
Here's an example record of 20 score differentials. The best 8 are 11.6, 14.3, 14.9, 15.2, 15.5, 15.8, 16.0, 16.4, so the Handicap Index is 15.0. The oldest score on the record is the 11.6: the golfer's best round, played most of a season ago.
Now the golfer has a good day and scores a 14.6, better than all but two of their last 20. But the 11.6 drops off as it comes in, and 14.6 is worse than the 11.6 it replaces among the best 8. The new index is 15.3: it has gone up after one of their best rounds of the year.
So it helps to know the oldest score on your record before you play. Your national body's app or website shows your scoring record; see how to check your golf handicap. If the next one to go is a counting score, you need to match it just to stay level.
Other reasons your index went up
- An exceptional score is wearing off. A differential 7.0 or more below your index cuts it by an extra 1.0, or 2.0 at 10.0 below. The R&A applies that cut to the differentials on your record at the time, so the effect dilutes as new scores replace them, and your index can creep up even while you play steadily.
- A run of high scores. Over time, if you play worse, your counting 8 get worse too. The caps below stop it happening too fast.
- It's your course handicap, not your index. If you get more strokes than before at the same course, the tees may have been re-rated. Courses are re-rated at least every ten years and after permanent changes. See course rating and slope explained.
How far can it go up? The soft and hard caps
Once you have 20 scores, the system remembers your Low Handicap Index: your lowest index in the 365 days before your most recent round. Your index can't run away from it:
- Soft cap. Any rise of more than 3.0 above your Low Handicap Index is halved.
- Hard cap. After the soft cap, your index can't be more than 5.0 above your Low Handicap Index.
With a Low Handicap Index of 10.0:
| Calculated index | After the caps |
|---|---|
| 12.5 | 12.5 |
| 14.0 | 13.5 |
| 15.0 | 14.0 |
| 17.0 | 15.0 |
| 20.0 | 15.0 |
There's no limit on how fast your index can come down.
Why hasn't it changed yet?
Your index should be updated no later than the day after a score is submitted. If a round doesn't appear at all, check that the competition counted for handicap, or that you registered a general play round before you teed off.
Working it through yourself
Enter your last 20 rounds, newest first, in the handicap calculator. Then add a possible next round at the top and remove the oldest to see what score you need to hold your index. Our guides to score differentials and working out your handicap cover the sums.
Check your Handicap Index estimate
Related guides
- How to score with a handicap: net and Stableford
- What is net double bogey?
- What is a score differential?
Sources
Golf Scout keeps your scorecards and works out a handicap estimate from your rated rounds as you play. Get Golf Scout on the App Store, free for iPhone and Apple Watch.