Rule 4 Calculator
What a non-runner deduction does to your winnings, with the full table.
Standard Tattersalls Rule 4(c) scale; individual bookmakers' bands can differ slightly. Deductions apply to winnings only, capped at 90p in the £.
How Rule 4 works
When a horse is withdrawn after a market forms, bets already struck on the remaining runners have a fixed amount deducted from their winnings (never the stake). The size depends on the withdrawn horse's price at the time it came out: the shorter the non-runner, the bigger the deduction. Multiple non-runners stack, capped at 90p in the £.
Worked example: £10 at 8/1, and the 2/1 second-favourite is withdrawn. 2/1 sits in the 30p band, so your £80 potential winnings become £56, and your total return £66 — effectively 5.6/1. The full background, including when Rule 4 does and doesn't apply, is in our Rule 4 guide.
The deduction table
| Price of non-runner | Deduction |
|---|---|
| 1/9 or shorter | 90p |
| 2/11 to 2/17 | 85p |
| 1/4 to 1/5 | 80p |
| 3/10 to 2/7 | 75p |
| 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 |
| 8/5 to 7/4 | 35p |
| 9/5 to 9/4 | 30p |
| 12/5 to 3/1 | 25p |
| 16/5 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 |
FAQ
Does Rule 4 come off my stake?
No — winnings only. A losing bet is unaffected.
Which price counts, morning or withdrawal?
The withdrawn horse's price at the time it was taken out of the market.
Does it apply to each-way bets?
Yes, to the winnings of both the win and place parts — our each-way calculator handles that case.
Does it apply to ante-post bets?
Generally no — but ante-post non-runners lose their stake instead. The trade-off explained.