League handicaps
How handicaps work
Every handicap in the league comes from one calculation: the USGA Rules of Handicapping — the World Handicap System rules GHIN runs. This page walks through it, from the score you post to the strokes you get.
Step 1
Your score: capping blow-up holes
One disaster hole shouldn't wreck a handicap, so before anything else each hole is capped. The result is your adjusted gross score.
- Once you have a handicap: the most any hole counts for is net double bogey — par + 2 + any strokes you get on that hole.(Rule 3.1b)
- Before you have one: the most is par + 5.(Rule 3.1a)
Only your handicap score is capped. Your real score stays on the leaderboard, in gross results and in your stats.
Step 2
The score differential
A differential measures how well you played against how hard the course is, so rounds on easy and hard courses can be compared. For 18 holes:
113 is the slope of a course of average difficulty. PCC is a playing-conditions adjustment for a day that played unusually hard or easy (0 on a normal day). The result is rounded to a tenth, .5 upwards.(Rule 5.1a)
9-hole rounds
Most league rounds are nine holes, and this league doubles the nine you played:league rule
differential = 9-hole differential × 2
The USGA instead adds the score you'd be expected to shoot on the nine you didn't play (Rule 5.1b). That is built for golfers who mostly post 18-hole scores. Every round here is nine holes, and your course handicap halves the index straight back again — so the league keeps your handicap on the holes you actually played. It gives lower indexes than GHIN would, by about 3 strokes for a high handicap.
Worked example
A 12.0 shoots 48 on a front nine rated 35.8 / 128, par 36
Course handicap for the nine: half the index is 6.0, so 6.0 × 128/113 + (35.8 − 36) = 7 strokes, given on the 7 hardest holes of the nine.
| Hole | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | Total |
|---|---|---|---|---|---|---|---|---|---|---|
| Par | 4 | 4 | 3 | 5 | 4 | 4 | 3 | 4 | 5 | 36 |
| Stroke | • | • | • | • | • | • | • | 7 | ||
| Score | 5 | 6 | 4 | 5 | 9 | 5 | 3 | 5 | 6 | 48 |
| Counts | 5 | 6 | 4 | 5 | 7 | 5 | 3 | 5 | 6 | 46 |
- The 9 on hole 5 is capped at net double bogey: par 4 + 2 + 1 stroke = 7. Adjusted gross: 46.
- 9-hole differential: 113/128 × (46 − 35.8) = 9.00
- Differential: 9.00 × 2 → 18.0
Try it
9.0 for the nine you played, doubled = 18.0. The league doubles nines rather than adding an expected score.
Step 3
Your Handicap Index
Your Handicap Index is the average of your best 8 of your last 20 differentials, rounded to a tenth. It shows what you can shoot on a good day, not your average. Your average round will usually be a few strokes above it.(Rule 5.2)
Getting your first index takes 54 holes (six nines or three 18s). Until then you play off your starting handicap, which is your real-world GHIN index. From your sixth nine on, your league index comes only from the rounds you play here.(Rule 4.5)
With fewer than 20 scores, fewer count, and very small records get a small extra cut:
| Scores in record | Best counted | Adjustment |
|---|---|---|
| 3 | Lowest 1 | -2.0 |
| 4 | Lowest 1 | -1.0 |
| 5 | Lowest 1 | — |
| 6 | Average of lowest 2 | -1.0 |
| 7–8 | Average of lowest 2 | — |
| 9–11 | Average of lowest 3 | — |
| 12–14 | Average of lowest 4 | — |
| 15–16 | Average of lowest 5 | — |
| 17–18 | Average of lowest 6 | — |
| 19 | Average of lowest 7 | — |
| 20 | Average of lowest 8 | — |
The highest index anyone can have is 54.0. (Rule 5.3)
Step 4
Safeguards
Exceptional scores
A round far better than your handicap is a sign your index is behind. When a differential is 7.0–9.9 below your index, your last 20 differentials all drop by 1.0. At 10.0 or more below, they drop by 2.0. Rounds that did it are marked Exceptional in your round history.(Rule 5.9)
Caps on how fast it can rise
After 20 scores you get a Low Handicap Index, the lowest your index has been in the past 365 days. It limits how fast your index can climb in a bad stretch:(Rules 5.7, 5.8)
- Soft cap: any rise past 3.0 above your low only counts half.
- Hard cap: it can never go more than 5.0 above your low.
- Nothing limits how fast it can come down.
Committee adjustments
Sometimes the scores can't keep up with the golfer — someone improves far faster than their last 20 rounds show, and the rules can only take 1.0 or 2.0 off at a time. The league can then adjust a player's index by hand, with a reason.(Rule 7.1)
An adjustment applies from the day it's made, never to rounds already played, and it shows on the player's page as a Committee badge, so it's never a secret. It comes off once the player's own scores say the same thing.
Step 5
From index to strokes
Your index is the same everywhere. The strokes you get depend on the course, tee and nine you play: your course handicap.(Rule 6.1)
9 holes: course handicap = (index ÷ 2) × (9-hole slope ÷ 113) + (9-hole rating − 9-hole par)
For nine holes, half the index is rounded to a tenth first. The result is rounded to a whole number, .5 upwards. Your course handicap is on each round's scorecard.
- Your tee: every player has a league tee (Black, Blue, White, Green, Gold, Red or Ladies). GSPro's tee boxes differ from course to course, so each round sets which GSPro tee each league tee plays. Your course handicap uses that GSPro tee's rating and slope.
- Where the strokes go: hardest hole first, by the course's stroke index. On a nine, holes are ranked by their 18-hole stroke index, so the hardest hole on the nine gets the first stroke. With more strokes than holes, they wrap around.(Appendix E)
- Plus handicaps give strokes back, starting with the easiest hole.
- Net score = gross − course handicap. Team scores use the best 3 net scores of 4.
- Net skins use the same strokes as the round — your course handicap, on the same holes.
Step 6
When your handicap updates
- Your index updates as soon as a round is finalized.
- Each round is played off the index you had when you teed off. A new index applies from your next round.
- Rounds go into your record in the order they were played. If a scorecard is corrected, your whole record is rebuilt so every later round is right.
- Blind draws and incomplete rounds never count toward a handicap.
Transparency
Compared to GHIN
Everything above follows the published USGA rules, apart from the rules the league has chosen for itself.
The league's own rules
GHIN adds the score you would be expected to shoot on the nine you did not play. Every round here is nine holes, so the league doubles the nine you did play instead. Indexes come out lower than a GHIN index would be.
Questions
FAQ
Why did my handicap go up after a good round?+
Your index is the best 8 of your last 20. Each new round pushes your 21st-oldest off. If that old round was one of your best 8, your index can rise even after a decent round.
Why didn't a bad round change anything?+
Only your best 8 count. A bad round usually isn't one of them, so it doesn't move your index.
My handicap on the scorecard doesn't match my index.+
The scorecard shows your course handicap: your index converted for that course, tee and nine. For nine holes it's roughly half your index, adjusted for how hard the nine is.
Where can I see how mine was worked out?+
On your player page, the round history shows every round's course handicap, gross, net and differential, with a check next to the ones counting toward your index.
Can the league change my handicap by hand?+
The league sets a starting handicap for new players, and can make a committee adjustment when someone's index clearly doesn't match how they're playing. That shows as a badge on their page, with a reason. Everything else comes only from your rounds.
See where you stand on the players page, or read the full USGA Rules of Handicapping.