Horse racing tool
Rule 4 calculator
A horse withdrawn close to the off? See exactly how much Rule 4 takes off your winnings.
Deduction
0p in the £
You receive
£0.00
Rule 4 deduction table (Tattersalls Rules of Betting)
| Odds of withdrawn horse | Decimal | Deduction |
|---|---|---|
| 1/9 or shorter | 1.11 or shorter | 90p in £1 |
| 2/11 to 2/17 | 1.12 to 1.18 | 85p in £1 |
| 1/5 to 1/4 | 1.20 to 1.25 | 80p in £1 |
| 2/7 to 3/10 | 1.29 to 1.30 | 75p in £1 |
| 1/3 to 2/5 | 1.33 to 1.40 | 70p in £1 |
| 4/9 to 8/15 | 1.45 to 1.53 | 65p in £1 |
| 4/7 to 8/13 | 1.57 to 1.62 | 60p in £1 |
| 4/6 to 4/5 | 1.66 to 1.80 | 55p in £1 |
| 5/6 to 20/21 | 1.83 to 1.95 | 50p in £1 |
| Evens to 6/5 | 2.00 to 2.20 | 45p in £1 |
| 5/4 to 6/4 | 2.25 to 2.50 | 40p in £1 |
| 8/5 to 7/4 | 2.60 to 2.75 | 35p in £1 |
| 9/5 to 9/4 | 2.80 to 3.25 | 30p in £1 |
| 12/5 to 3/1 | 3.40 to 4.00 | 25p in £1 |
| 16/5 to 4/1 | 4.20 to 5.00 | 20p in £1 |
| 9/2 to 11/2 | 5.50 to 6.50 | 15p in £1 |
| 6/1 to 9/1 | 7.00 to 10.00 | 10p in £1 |
| 10/1 to 14/1 | 11.00 to 15.00 | 5p in £1* |
| Over 14/1 | Over 15.00 | No deduction |
*Several bookmakers (e.g. bet365) waive the 5p deduction as a goodwill concession. Check your bookmaker's own policy.
What is Rule 4?
When a horse is withdrawn too late for the betting to be reformed, a deduction (Rule 4) is taken from winning bets on the remaining horses. The deduction is based on the withdrawn horse's odds at the time — a shorter-priced horse means a bigger deduction, because it was more likely to have won.