Golf term
Penalty Stroke
A penalty stroke is an extra stroke added to a golfer's score under the Rules of Golf, most commonly for a shot into a penalty area, a ball out of bounds, or a ball declared unplayable.
A penalty stroke is the Rules of Golf's way of pricing an infraction the same way any other stroke counts — it simply adds to the score without a shot being played toward the hole. The most common triggers are a ball in a red or yellow penalty area, a ball out of bounds, and a ball declared unplayable, each with its own relief options and stroke cost.
In strokes gained terms, a penalty is priced into the shot that caused it: the expected strokes at the new position are subtracted from the expected strokes at the start, the stroke just played is subtracted, and then the penalty stroke is subtracted again. A tee shot that finds the water doesn't just lose the distance it would have gained — it loses a full extra stroke on top, usually the single most expensive way to lose strokes gained on a hole.
Because a penalty changes both the score and the position a golfer plays from next, it has to be recorded rather than skipped or averaged away for a strokes gained number to stay accurate.
Related terms & guides
Glossary
Expected Strokes
Expected strokes is the average number of strokes a benchmark golfer needs to finish a hole from a specific distance and lie, and it is the number strokes gained subtracts before and after every shot.
Strokes Gained
Strokes Gained Explained: The Complete Guide
Strokes gained measures every shot against a benchmark of expected scores, revealing exactly where you gain or lose strokes versus a chosen standard — instead of guessing from fairways, greens, and putts.
Glossary
Lie (Golf)
A lie is the surface and condition a golf ball is resting on before a shot — fairway, rough, sand, and so on — and, together with distance, it sets a shot's expected strokes.
Guide
Strokes Gained Explained: The Complete Guide