rule 4 deductions for bettors: what a non-runner costs your winnings

what rule 4 is

Rule 4 is the deduction the bookmaker takes from your winnings when a horse is withdrawn from a race after you have placed your bet. It is not a deduction from your stake. Your stake comes back in full on any winning bet, always. The deduction is taken only from the profit part of your return.

Here is why it exists. When a horse comes out of a race, the race gets easier for every remaining runner. Your selection's chance of winning improves, because one rival has gone. The bookmaker therefore adjusts the payout to match the market that would have existed had the withdrawal happened before you bet. That is all rule 4 is: a correction.

The key point is timing. Rule 4 applies only to bets placed before the withdrawal is announced. If you bet after the withdrawal, you get the new, shorter prices with no deduction at all. The market has already adjusted, so there is nothing to correct. The rule only touches bets that were struck when the withdrawn horse was still in the race.

the deduction scale

The deduction is expressed in pence in the pound. That means the number of pence taken off every £1 of profit, not of stake. A 30p deduction on £30 of winnings takes £9.00. The scale is fixed by industry rules, the Tattersalls rule 4(c) table, and every licensed UK bookmaker applies the same numbers.

The shape of the scale is simple. The shorter the withdrawn horse's odds, the bigger the deduction, because a short-priced withdrawal removes a serious rival and improves your horse's chance the most. At the top, a horse withdrawn at 1/9 or shorter means a 90p deduction in the pound. That is the ceiling. At the bottom, a horse withdrawn at 10/1 to 14/1 means just 5p in the pound. And a horse withdrawn at over 14/1 means no deduction at all, because its removal barely changes the race.

The full 19 row table is printed below. It runs from 90p at the top down to 5p, with every band in between. A few rows are worth knowing by heart. A 2/1 horse withdrawn means 30p in the pound. A 5/2 horse means 25p. An 8/1 horse means 10p. Evens to 6/5 means 45p. These are the bands you will meet most often in practice.

odds of withdrawn horse	deduction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

One concession is worth knowing. Many bookmakers waive a single 5p deduction. If only one horse comes out and it is priced 10/1 to 14/1, several books will settle your bet in full rather than apply the 5p. It is not a universal rule, so check your bookmaker's terms, but it is common enough to be worth asking about.

worked examples with exact pounds

The arithmetic is straightforward once you see it. Take a £10 bet at 3/1. A 2/1 horse is withdrawn, which means 30p in the pound. Your winnings are £30. The deduction is 30p for every £1 of that £30, which is £9.00. So your winnings drop to £21.00, your £10 stake comes back in full, and your total return is £31.00. Without the deduction you would have had £40.00 back. That is why a short-priced withdrawal hurts: it takes a real chunk of your profit.

A gentler example. A £10 bet at 6/1, and an 8/1 horse is withdrawn, which means 10p in the pound. Your winnings are £60. The deduction is £6.00. Your winnings drop to £54.00, your £10 stake comes back, and your total return is £64.00.

Now the stacking case. A £10 bet at 10/1. First a 5/2 horse is withdrawn, which is 25p in the pound. Later an 8/1 horse is withdrawn, which is 10p. The combined deduction is 35p. Your winnings are £100. The deduction is £35.00. Your winnings drop to £65.00, your £10 stake comes back, and your total return is £75.00.

There is an aggregate cap. However many horses come out, the combined deduction never exceeds 90p in the pound. Imagine two 1/9 favourites withdrawn. Each alone would be 90p, but the total is capped at 90p. On £100 of winnings you keep £10 plus your stake. The bookmaker cannot take more than 90p of every £1 of profit, no matter how many runners disappear.

each-way and place-only interaction

Rule 4 applies separately to each leg of an each-way bet. The win leg takes the deduction on the win winnings, and the place leg takes the same rate on the place winnings. Each is calculated on its own.

Here is the worked example. A £10 each-way bet at 6/1 with 1/4 place terms gives a place price of 6/4. A 2/1 horse is withdrawn, which means 30p in the pound. If your horse wins, the win winnings are £60, and the deduction is £18.00, leaving £42.00. The place winnings are £15, and the deduction is £4.50, leaving £10.50. Your £20 stake comes back in full. Your total return is £72.50. With no deduction you would have had £95.00 back.

Notice that the place leg's cash hit is smaller, because place winnings are smaller. The same 30p rate takes £18.00 from the win leg but only £4.50 from the place leg. That is not special treatment, just the maths of a smaller base.

A place-only bet works the same way. The deduction applies to the place winnings at the same rate. Some bookmakers treat place-only legs slightly differently in their settlement systems, so check the terms if the numbers look odd. The site's each-way guide and place-only guide cover the leg mechanics in full, and the odds converter will switch between fractional and decimal prices when you are checking a settlement.

why it is fair, not a scam

Rule 4 can feel like the bookmaker reaching into your pocket. It is worth understanding why it is not.

Before the withdrawal, your 3/1 shot implied a 25% chance of winning. The withdrawn 2/1 horse carried a 33.3% implied chance. That probability does not vanish when the horse comes out. It is redistributed among the remaining runners. Your horse's true chance of winning genuinely improved, because one of the most dangerous rivals is gone. The deduction simply returns your payout to roughly what the market would have priced had the withdrawal happened before you bet.

The scale is a fixed industry table, Tattersalls rule 4(c), unchanged for years and applied by every licensed UK bookmaker. It is not a bookmaker invention and it is not adjusted race by race to squeeze punters. It is a blunt instrument, and the evidence from bookmaker pricing and studies of the table suggests it slightly favours the punter. The true probability redistribution is rarely as clean as the fixed bands, and where they diverge, the punter tends to come out ahead.

exchanges differ

On Betfair Exchange the equivalent is a market reduction factor, applied to the price of every matched bet, back and lay, rather than to winnings. If the factor is under 2.5%, no reduction is applied at all. Bets matched after the withdrawal are unaffected. That is the short version, and it is enough for most punters.

ante-post caveat

Ante-post bets are usually not covered by rule 4. If your ante-post selection is withdrawn, you typically lose your stake, unless the bookmaker has advertised non-runner no bet on that race. That is the ante-post risk premium: you get the early price in exchange for carrying the withdrawal risk yourself. A few bookmakers offer NRNB on selected big races, but never assume it. Check before you stake.

a practical checklist

Before you bet, check the non-runners and their withdrawal prices. If a short-priced horse is already out, the market has adjusted and your bet is priced accordingly. The rule 4 only bites on withdrawals that happen after you have struck the bet.

Know roughly where your own bet's odds sit on the scale. If you backed a 3/1 shot and a 2/1 horse comes out, you know the deduction is 30p in the pound. You can sanity-check the settlement in seconds with the odds converter and the table above.

Remember best odds guaranteed. With BOG you get the better of SP or your taken price, and the rule 4 is applied to whichever wins. So if you took 5/1 and the horse goes off 3/1, you get settled at 5/1 with the deduction applied to that. If SP is bigger, you get SP with the deduction applied to that.

Check whether a 5p deduction was actually applied or waived. Many books waive a single 5p, so if you see a small deduction on a 10/1 to 14/1 withdrawal, it is worth a polite query.

And if the numbers do not add up, query the settlement. You have the rule 4 scale in hand, you know your stake, you know your odds. A polite message with the arithmetic usually sorts it out quickly.

the honest endnote

Rule 4 is part of the game. It is fixed, it is fair, and it applies to every punter equally. The deduction only touches winnings, never your stake, and the scale is generous at the margins. Understanding it means you are never surprised by a settlement, and you can spot an error when one appears.

Bet within your means. Treat your bankroll as money you can afford to lose, never chase losses, and stop if it stops being enjoyable. Deductions are the cost of betting into a market that adjusts when runners come out. That adjustment is honest, and now you know exactly how it works.

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