Tattersalls Rule 4(c)
You may have heard about Rule 4 c deductions. What
Rule 4 deductions are there to protect bookmakers who
lay early prices or even early show prices, only to
find out that a runner is then removed from the market.
Take the situation where a bookmaker gives 4/1 about
a second favorite, only to later find the odds on favorite
To protect themselves from this situation Rule 4 deductions
are applied. The general logic behind them is that the
lower the odds of the withdrawn horse, the higher the
deduction is made from winnings.
The list below is the official Tattersalls Rule 4c
deduction table to which the vast majority of Uk bookmakers
There are a few bookmakers who now have started to
gain a competitive market edge by offering concessions.
For example I have noted one or two online
bookmakers stating that they will not apply deductions
in the event of a non runner being priced up at 10/1
to 14/1, a price band that would normally give rise
to a 5% reduction.
Price at time of withdrawal and amount deducted in
the £ from winnings:
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
In the event of there being two or more withdrawals
in one event, the total deduction shall not exceed 75%
You take an early price of 10/1 with a £100 stake.
After your bet has been made and accepted, a non runner
is declared at 5/1.
Your horse wins.
Had the non runner not been declared you would have
received back your stake £100 plus your winnings
£100 *10 = £1000
However due to the reduction for the withdrawal of
the other horse you must adjust your winnings by subtracting
15p in the pound.
ie you only win 85% of what you would have.
£100 * (10 * 0.85) = £850
Now read reduction factors
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