When a horse has been withdrawn, the remaining bets will be subject to Tattersalls Rule 4. This means your bet will incur deductions according to the price of the non-runner at the time of withdrawal. However should a new market be formed before the 'off' of a race, then only bets with a price taken before the time of withdrawal will be affected.
Here's a breakdown of the deductions based on the price of the non-runner;
- 1/9 or shorter - 90p
- 2/11 to 2/17 - 85p
- 1/4 to 1/5 - 80p
- 3/10 to 2/7 75%
- 2/5 to 1/3 - 70p
- 8/15 to 4/9 - 65p
- 8/13 to 4/7 - 60p
- 4/5 to 4/6 - 55p
- 20/21 to 5/6 - 50p
- Evens to 6/5 - 45p
- 5/4 to 6/4 - 40p
- 13/8 to 7/4 - 35p
- 15/8 to 9/4 - 30p
- 5/2 to 3/1 - 25p
- 10/3 to 4/1 - 20p
- 9/2 to 11/2 - 15p
- 6/1 to 9/1 - 10p
- 10/1 to 14/1 - 5p
- over 14/1 No deduction