With horse racing, surprises are part of the thrill - but nothing changes a race quite like a late withdrawal and the arrival of Rule 4. For casual punters, the story behind Rule 4 is about fairness, not frustration.
This guide from 888sport explores why your payout might be lower than expected, and how Rule 4 deductions keep the game balanced for everyone who loves a flutter.
So whether you're looking at major meetings, such as the 2026 Grand National Festival, or simply want to learn a little more about how rule 4 deductions work, check out our guide below.
Understanding Rule 4: Why Deductions Happen
Imagine backing your horse at 7/4, with a winning return of £35 on a £20 bet. Then, a favourite is withdrawn before the start, and suddenly your payout is trimmed by 20% thanks to Rule 4.
This isn’t a penalty - it’s a recalibration, applied industry-wide so odds reflect the new race dynamics. The deduction is expressed as pence in the pound and depends on the odds of the non-runner, ensuring every payout mirrors the real risk.
How Does Rule 4 Work?
Rule 4 deductions only apply to bets placed after final declarations but before the race actually starts. If a horse is withdrawn, a set percentage is deducted from your winnings (not your stake). For example, a 4/1 non-runner triggers a 20p in the pound deduction, or 20%.
The higher the chance a horse had of winning, the higher the deduction if it’s withdrawn. For withdrawals at odds over 14/1, there’s no deduction at all. And, no matter how many horses are withdrawn, the total deduction won’t exceed 90p in the pound.
The Rule 4 Deduction Chart: Odds vs. Deductions
These are the industry-standard figures: if a withdrawn horse was 1/4, expect an 80p deduction per £1; at 4/1, it’s 20p; at 10/1, just 5p.
This chart is your friend when calculating potential payouts, but remember, some bookmakers waive the smallest (5p) deduction as a goodwill gesture.
Multiple Withdrawals and Their Impact
If more than one horse is withdrawn, deductions can stack, but you’ll never lose more than 90% of your winnings.
Transparency is key - racecourses now offer printed cards explaining Rule 4, so there’s less confusion and fewer surprises at the payout counter.
When Does Rule 4 Not Apply?
Ante-post bets placed before final declarations dodge Rule 4, but they come with their own risk: if your pick doesn’t run, the bet is lost.
Bets placed after the market has adjusted for withdrawals are also free from Rule 4. Best odds guaranteed still stands, even after a deduction, so you’re always covered for the best outcome on your ticket.
Safer Gambling and Enjoyment
Every bet is about the experience, not just the outcome. Setting a budget, using session reminders, and walking away when the fun fades are essential habits for enjoying the sport. Explore the full world of racing with balance and peace of mind.
Significant Terms: Rule 4 deductions apply to bets placed after final declarations and before the race starts.
Deductions are based on odds of withdrawn runners, up to a maximum of 90p in the pound; winnings only, not stake. Minimum deposit and wagering requirements may apply. See full terms on site.
For Safer Gambling support, visit www.begambleaware.org or call the National Gambling Helpline on 0808 8020 133.
