Rule 4 Deductions

James Dooley avatar

Written By:


Rule 4 deductions are applied to bets when a horse is withdrawn from a race after the time of your bet wagered.

The rule 4 deduction is applied because it becomes easier for the other runners to win and the market is false without the withdrawn horse.

As each horse in the race will have one less to beat it is more likely that it will win, then horse racing rule 4’s are applied.

In our Rule 4 Deductions guide, we explain the amount of money that is taken out of winnings to balance the effect of the withdrawn runner.

Find out more about rule 4 deductions:

Rule 4 Deductions

Rule 4 Deductions Chart

Here is the Rule 4 Deductions Chart which provides the amount of money deducted calculated against the betting odds.

1/9 or shorter1.11 or shorter90p in £1
2/11 to 2/171.18 to 1.1285p in £1
1/4 to 1/51.25 to 1.2080p in £1
3/10 to 2/71.30 to 1.2975p in £1
2/5 to 1/31.40 to 1.3370p in £1
8/15 to 4/91.53 to 1.4565p in £1
8/13 to 4/71.62 to 1.5760p in £1
4/5 to 4/61.80 to 1.6655p in £1
20/21 to 5/61.95 to 1.8350p in £1
Evens to 6/52.00 to 2.2045p in £1
5/4 to 6/42.25 to 2.5040p in £1
8/5 to 7/42.60 to 2.7535p in £1
9/5 to 9/42.80 to 3.2530p in £1
12/5 to 3/13.40 to 4.0025p in £1
16/5 to 4/14.20 to 5.0020p in £1
9/2 to 11/25.50 to 6.5015p in £1
6/1 to 9/17.00 to 10.0010p in £1
10/1 to 14/111.00 to 15.005p in £1
Over 14/1Over 15.00No deduction

Not all online sportsbook bookmakers make a deduction when Rule 4 is 5p in the pound for a non runner in a race.

If more than one horse is withdrawn in the same race the figure will likely be higher.

What is a rule 4 deduction in the UK?

A Rule 4 deduction in the UK applies to winning bets and deducts a set value in pence out of every pound won.

The size of the deduction is determined by the betting odds of the horse withdrawn.

The level of the rule 4 deductions ranges from 90p in the pound at 1-9 or shorter to 5p in the pound at odds of 10-1 to 14-1.

Non-runners can hugely affect the payouts when the favourites are withdrawn.

What is the maximum rule 4 deduction?

The maximum rule 4 deduction is 90p per £1 winning return.

90% rule 4 deductions are only applied when the odds on the favourite are as short as 1-9 in the betting odds or several favourites are withdrawn.

The Rule 4 Deductions Chart helps you calculate the returns and help predict your potential payout.

How do you calculate Rule 4?

To calculate how much a rule 4 costs you need to change ‘pence’ to per cent and deduct that from your profit.

So here are some examples of how to calculate the deductions for horse racing rule 4’s:

  • A 10p rule 4 deduction on a winner will reduce your profit by 10%
  • A 20p rule 4 deduction on a winner will reduce your profit by 20%
  • A 40p rule 4 deduction on a winner will reduce your profit by 40%
  • A 50p rule 4 deduction on a winner will reduce your profit by 50%

Each price has a corresponding deduction on the Rule 4 Deductions table.

Whichever band the betting odds fall into, the corresponding deduction will be made against the odds that have already been taken.

Do Rule 4 Deductions Vary Between Bookmakers?

The Rule 4 price will be dependent on the betting odds at which the non-runner was trading at the time of its withdrawal and will be specific to the sports betting bookmaker.

It is unusual for rule 4 deductions to vary between online sportsbook bookmakers.

Bookmaker odds on horses when races are first priced up the day before the race can vary significantly, but rule 4 costs generally are very similar.

Does the best odds guaranteed bonus still apply after a rule 4?

Rule 4 still applies to bets placed under the best odds guaranteed bonus.

The bet will be paid out on whatever return is better – the original odds with the rule 4 applied or the starting price.

What is Rule 4 on Betfair Exchange?

The Betfair Exchange Rule 4 applies should a horse be declared a non-runner after bets have been placed.

The reduction factor will be applied to the prices of all Betfair Exchange matched bets, for both backers and layers.

If the reduction factor for the withdrawn horse is less than 2.5% a rule 4 deduction is not applied on the Betfair Exchange.

Summary of Rule 4 Deductions in Betting

Rule 4 is an industry-wide deduction rule created for when there are non-runners in a horse race after the final declarations have been made.

Rule 4’s is simply a payout deduction that is made to winning bets, when the race is impacted by a horse not running.

A rule 4 will affect how much a winning bet pays out, so check that out using our calculator.

Betting Articles