Rule 4 Deductions and Each-Way Bets: How Withdrawals Reduce Your Payout
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The Deduction That Catches New Punters Off Guard
I once watched a punter at Newmarket celebrate a 6/1 winner, only to check his account and find the payout was 20% less than he had calculated. He thought the bookmaker had made an error. They had not. A non-runner earlier in the day had triggered a Rule 4 deduction, and nobody had told him to expect it. That moment — the gap between the price on the slip and the money in the account — is the source of more confusion in British racing than almost any other settlement rule.
Rule 4 exists because withdrawals change the nature of the race. When a horse is taken out after betting has opened, the remaining horses become more likely to win or place, which means the original odds are now too generous. Rather than void every existing bet and start the market from scratch, the industry applies a standardised deduction that adjusts payouts downward. It is a blunt instrument, but it keeps the market functioning when the field changes.
Favourites in British racing win approximately 30-35% of the time, per Matchbook Insights analysis, and when a fancied rival is withdrawn, the favourite’s probability jumps significantly — which is exactly the scenario Rule 4 is designed to address.
The Rule 4 Deduction Scale: From 5p to 90p in the Pound
The scale is published by Tattersalls and applied uniformly across the industry. The deduction is expressed in pence per pound of winnings, and it is linked to the price of the withdrawn horse at the time of withdrawal. The shorter the price of the non-runner, the larger the deduction on remaining bets.
At the lower end, a horse withdrawn at odds of 14/1 or longer triggers a deduction of 5p in the pound. At the top end, a withdrawn odds-on favourite at 1/9 or shorter triggers a 90p deduction — meaning 90% of your winnings are wiped out. The full scale runs roughly as follows: 3/1 withdrawn horse equals 15p; 2/1 equals 20p; evens equals 30p; 1/2 equals 45p; 1/3 equals 55p; 1/5 equals 70p. The exact figures are set by Tattersalls and published on their website, but the principle is simple: the more the withdrawal reshapes the race, the larger the deduction.
A critical point that many punters miss: Rule 4 applies only if you placed your bet before the withdrawal was confirmed. If you bet after the non-runner is declared and the market has already adjusted, Rule 4 does not apply to your bet. The deduction compensates for the fact that your original price was struck in a different competitive landscape.
How Rule 4 Applies to the Win and Place Parts Separately
Here is where each-way bets add a layer of complexity. Rule 4 deductions are applied independently to the win part and the place part of an each-way bet. The deduction percentage is the same for both, but the calculation runs on each portion’s winnings separately.
Take a concrete example. You back a horse at 10/1 each-way, five pounds on each part, in a twelve-runner race with 1/4 place terms. A rival is withdrawn at 2/1, triggering a 20p-in-the-pound Rule 4 deduction. The horse wins.
Win part calculation: normal return is (5 x 10) + 5 = 55 pounds. The profit element is 50 pounds (55 minus the 5-pound stake). Rule 4 at 20p: 50 x 0.80 = 40 pounds profit. Add back the stake: 45 pounds win return.
Place part calculation: place odds are 10/4 = 2.5/1. Normal return is (5 x 2.5) + 5 = 17.50 pounds. Profit element: 12.50 pounds. Rule 4 at 20p: 12.50 x 0.80 = 10 pounds profit. Add back the stake: 15 pounds place return.
Total collection: 45 + 15 = 60 pounds, against a 10-pound outlay. Without Rule 4, the total would have been 72.50 pounds. The deduction cost 12.50 pounds — not a negligible amount, and the kind of reduction that can turn a profitable each-way season into a breakeven one if withdrawals are frequent.
BHA data showed that the average turnover per race on core fixtures fell 14.4% year on year in the first quarter of 2025, and part of the frustration expressed by punters relates to the compounding effect of Rule 4 on an already pressured market. When your returns are being trimmed by deductions on races where the field changes late, the perceived value of early-price betting erodes — which is exactly why tools like Best Odds Guaranteed exist as a counterweight.
Timing and Market Choice: Reducing Rule 4 Exposure
You cannot avoid Rule 4 entirely if you bet at fixed odds before the off, but you can manage your exposure through timing and market selection.
Betting closer to the off reduces the window in which a withdrawal can occur between your bet and the race. Most non-runners are declared by the morning of the race, so punters who wait until shortly before the off are less likely to be caught by a late withdrawal. The trade-off is that you may miss the best early prices — which is where Best Odds Guaranteed, if available, offers protection in the other direction.
Market selection matters too. Races with large fields carry a higher probability of at least one withdrawal, simply because more horses means more opportunities for one to be pulled out. Handicaps with 16 or more declared runners are particularly prone to late withdrawals after the overnight declarations, when trainers assess the final going or spot-check their horse on the morning of the race.
Exchange betting offers a structural advantage here. Bets placed on an exchange after a withdrawal are struck at the new market price, with no Rule 4 applied. Even bets placed before the withdrawal are subject to the exchange’s own rules, which may differ from Tattersalls. For punters who regularly face Rule 4 deductions on fixed-odds bets, monitoring the dead-heat settlement rules alongside Rule 4 helps build a complete picture of how post-race adjustments can erode your expected returns.
Rule 4 Questions Answered
Is Rule 4 applied before or after calculating each-way returns?
Rule 4 is applied to the profit element of each part after the standard return is calculated. You first work out the win return and place return as normal, then subtract the stakes to isolate the profit on each part, apply the deduction percentage to each profit figure, and add the stakes back. The deduction never reduces the return of a winning or placed bet below the original stake.
Can Rule 4 deductions reduce your payout to less than your stake?
No. Rule 4 applies only to the profit element of the bet, not to the returned stake. If your horse wins or places, you receive at least your stake back. However, on a very short-priced winner with a large Rule 4 deduction, the profit can be reduced to near zero — meaning your total return is barely above the stake amount.
Prepared by the Horse Racing Show bet editorial staff.
