Net double bogey explained
Net double bogey is the maximum score you can record on any hole for handicap purposes under the World Handicap System. It stops one blow-up hole from wrecking your Handicap Index. The rule is simple — Par + 2 + the handicap strokes you receive on that hole — and here is exactly how it works, with a worked example.
Open the Score Differential calculatorThe Score Differential calculator works from your Adjusted Gross Score — the score after the net double bogey cap below has been applied to each hole.
What net double bogey is
Net double bogey (NDB) is the maximum score per hole that counts towards your handicap under the World Handicap System (WHS). It is a safeguard: if you take a wild number on a single hole — a triple, a quadruple, or worse — only the net double bogey figure is used when your round is turned into a score differential. That way one disaster hole does not distort a number that is meant to reflect your overall ability.
The cap applies per hole and produces your Adjusted Gross Score (AGS). Any hole where you scored at or below the net double bogey is unchanged; only holes above it are trimmed back down to the cap.
The net double bogey formula
The maximum for any hole is built from three parts — the hole’s par, a fixed two strokes, and the handicap strokes you personally receive on that hole:
- Par
- the par of the hole being played (3, 4 or 5)
- +2
- a plain double bogey — two strokes over par
- Strokes Received
- the handicap strokes allocated to that hole from your Course Handicap, distributed by stroke index
The “net” part is the strokes received: a double bogey after you have been given your handicap allowance on the hole. A scratch golfer who receives no strokes has a net double bogey equal to a plain double bogey.
Worked example
Take a par 4 on which the golfer receives 1 handicap stroke (because it falls within their Course Handicap allocation). The cap is:
Suppose the golfer actually took a 9 on that hole. For handicap purposes the 9 is written down as a 7 in the Adjusted Gross Score. The two strokes above the cap simply do not count towards the score differential.
How strokes received are allocated
The strokes-received part comes from your Course Handicap, spread across the 18 holes by their stroke index (the 1–18 ranking of hole difficulty printed on the card). If your Course Handicap is 18, you receive one stroke on every hole. If it is 9, you receive a stroke only on the nine hardest holes — those with stroke index 1 to 9. Above 18, you start receiving a second stroke on the lowest stroke-index holes: a Course Handicap of 22 gives two strokes on stroke-index holes 1 to 4 and one stroke everywhere else.
Why net double bogey matters
Net double bogey feeds directly into the number that measures your game. After the cap is applied hole by hole, the total is your Adjusted Gross Score, and that AGS is the value used in the score differential formula — not your raw gross. In other words, the differential that eventually becomes part of your Handicap Index is built on capped scores, which is why the adjustment happens before anything else. The mechanics of that next step are covered in what is a score differential in golf, and you can run your own AGS through the score differential calculator.
Net double bogey by par and strokes received
The cap rises with both the par of the hole and the strokes you receive on it. A quick reference:
| Par | Strokes received | Net double bogey cap |
|---|---|---|
| 3 | 0 | 5 |
| 3 | 1 | 6 |
| 3 | 2 | 7 |
| 4 | 0 | 6 |
| 4 | 1 | 7 |
| 4 | 2 | 8 |
| 5 | 0 | 7 |
| 5 | 1 | 8 |
| 5 | 2 | 9 |
Net double bogey applies only for handicap purposes. It does not change your actual competition gross score — if you took a 9, your card and any stroke-play result still show a 9. The cap is used purely to build your Adjusted Gross Score for the differential, and your club or association software applies it automatically, so you rarely have to do the arithmetic yourself.
Frequently asked questions
Does net double bogey change my competition score?
No. Net double bogey only caps your hole scores for handicap purposes, producing the Adjusted Gross Score. Your actual competition gross score is unaffected and still counts every stroke you took.
How do I know how many strokes I receive on a hole?
Your Course Handicap is allocated across the 18 holes by stroke index. If your Course Handicap is 18 you receive one stroke on every hole; if it is 22 you receive a second stroke on the four lowest stroke-index holes.
Do I have to apply net double bogey myself?
Usually not. Your club or association software applies the net double bogey cap automatically when it calculates your Adjusted Gross Score and score differential, so you only need to enter your actual scores.
Related tools and reading
Score Differential calculator
Turn an Adjusted Gross Score, Course Rating and Slope into a score differential.
ReadHow is a golf handicap calculated?
How differentials, the lowest 8 of 20 rule and the reduced-count table build your Index.
Sources
- USGA & The R&A, Rules of Handicapping — net double bogey adjustment (maximum hole score for handicap purposes). Checked 24 Aug 2026.