Golf Stroke Index Explained
The stroke index is the most-ignored column on a scorecard and the one that decides who wins your match. Here is exactly what those numbers 1 to 18 do.
What the numbers 1 to 18 actually mean
Every hole on a course carries a stroke index between 1 and 18, printed on the card, usually labelled "SI", "Index", "Hcp" or "Handicap". Index 1 is where the first handicap stroke is given, index 18 is where the last one is given.
It is a ranking of where a stroke does the most good, not a simple ranking of difficulty. Those usually correlate, but not always — which is why the toughest par 3 on the course is rarely index 1.
How strokes are allocated to your card
Take your playing handicap and count down the stroke index from 1. A 9-handicapper gets a shot on indexes 1 to 9 and nothing on 10 to 18. A 15-handicapper gets a shot on indexes 1 to 15.
Above 18, it wraps. A 22-handicapper gets one shot on every hole, plus a second shot on indexes 1 to 4. The formula is: one stroke per full 18, then one extra on every hole whose index is less than or equal to the remainder.
So handicap 22 breaks down as 22 ÷ 18 = one shot everywhere, remainder 4 = a second shot on indexes 1, 2, 3 and 4.
Why index 1 is not always the hardest hole
Stroke indexes are meant to be spread so that shots fall evenly through the round — odd indexes on one nine, even on the other, and no two low indexes back to back. That spreading rule sometimes outranks pure difficulty.
There is also a deeper principle: a stroke should go where a higher handicapper most needs it relative to a lower one. That tends to mean long holes rather than fiddly short ones. A brutal 160-yard par 3 over water is hard for everyone, so a shot there does not close the gap — it often gets a middling index.
Stroke index in match play vs stroke play
In stroke play you use your own full handicap against the course. In match play you use the difference between the two players. If you are 14 and your opponent is 6, you get 8 shots — on indexes 1 to 8 — and the lower handicapper plays off scratch.
This matters more than people realise, because giving both players their full allowance and comparing net scores can produce a different result. Strokes are integers on individual holes, so a pair match has to be scored as a pair.
Common mistakes
Using the wrong tee’s index. Some cards print separate men’s and women’s stroke indexes, and they are not the same. Take the one for the tees you are playing.
Forgetting the wrap above 18. Plenty of groups quietly cap everyone at one shot a hole, which materially disadvantages higher handicappers.
Applying full handicaps in a two-ball match instead of the difference. It is the single most common scoring error in friendly golf.
How Go Live Golf handles it
Go Live Golf reads the stroke index for the tees you selected and applies strokes automatically — including the wrap above 18 — for every game it scores.
For pair matches it uses the difference between the two players, low man off scratch, because that is the correct match-play convention. For field games like skins and Stableford it uses each player’s full allowance. You never have to remember which is which.
How courses decide their stroke indexes
Handicapping authorities recommend that indexes are set by comparing scores of higher and lower handicap players hole by hole. The hole where higher handicappers lose most ground relative to better players is the one that most deserves a stroke.
On top of that comes the distribution rule: odd indexes on one nine and even on the other, low indexes spread rather than clustered, and generally not index 1 or 2 on the opening or closing hole. Nobody wants a match decided by a stroke on the 18th.
That is why the printed index sometimes looks wrong to a good player. It is not ranking difficulty for you; it is ranking where a shot most closes the gap between you and a higher handicapper.
Reading a card you have never seen
Find the column headed SI, Index, Hcp or Stroke. Check whether there are separate men’s and women’s columns and take the one for your tees.
Then count: your playing handicap tells you how far down that list your strokes reach. It is worth doing once on the first tee rather than guessing on the 12th.
If you are playing a match, do the subtraction first. Only the difference between the two of you matters, and the strokes fall on the lowest indexes from there.
Never count shots on your fingers again
Strokes fall on the right holes automatically, for every player and every format, on whichever tees you picked.
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Frequently asked questions
What does stroke index 1 mean in golf?
It is the hole where the first handicap stroke is given. It is usually a hard hole, but the index is about where a shot is most useful, not pure difficulty.
How do I know which holes I get shots on?
Count down the stroke index from 1 to your playing handicap. Handicap 11 means shots on indexes 1 to 11.
What happens if my handicap is over 18?
You get one shot on every hole, plus a second shot on the low-index holes — as many as the remainder above 18.
Do men and women use the same stroke index?
Not always. Many cards print separate indexes; use the one that matches the tees being played.