← Blog · 📝 Article · 3 November 2026

Late Scratchings on Betfair: What Happens to Your Bets

Late Scratchings on Betfair: What Happens to Your Bets

When a horse is withdrawn after the market has been loaded, Betfair voids any matched bets on that horse, removes it from the market and may apply a reduction factor to bets on the remaining runners. Unmatched offers can also be cancelled, depending on the size of the reduction. If you lay horses, this matters more than almost anything else on race day, because a late scratching can change your liability and your price after you have placed the bet.

This guide explains what a late scratching is, what happens to matched and unmatched bets, how to work out the reduction yourself, and how to set up your lay betting so a withdrawal does not catch you out.

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TL;DR

Table of Contents

What a late scratching means on Betfair

Betfair’s Exchange Horse Racing Rules define a non-runner as a horse that was listed when the relevant market was loaded but does not subsequently come under starter’s orders. “Late scratching” is the everyday term for a withdrawal that happens close to the off, often after you have already placed your bet.

There are a few common reasons a horse is taken out late. Going changes, a horse proving unsuitable at the start, or a problem in the paddock or at the stalls are typical. From your side of the screen the cause does not matter. What matters is the timing: before your bet is matched, after it is matched, or after the market has gone in-play.

The key point for lay bettors is that a scratching is not a loss and not a win. Your bet on the withdrawn horse is simply cancelled. The effect on your other bets is where the money moves.

What happens to matched and unmatched bets

The rules separate the two clearly.

Matched bets on the non-runner are voided and the horse is removed from the market. If you laid a horse that was then withdrawn, you keep your stake and your liability is released. You neither win nor lose on that selection.

Matched bets on the other runners may be adjusted through a reduction factor, covered below.

Unmatched bets are treated differently depending on the market. According to Betfair’s horse racing rules, in the win market reductions apply at 2.5% or greater, and unmatched lay offers are cancelled. In the place market, reductions apply at any percentage, and unmatched lay offers are cancelled at 4.0% or greater.

Win and place market lay cancellation thresholds

In practice, that means a lay offer you left sitting in the queue at a price you liked may disappear when a well-fancied horse is withdrawn. If you are not watching, you may think you are still waiting to be matched when your order has gone.

If you leave unmatched bets when a market turns in-play, Betfair lets you choose an “At In-Play: Keep” option. Betfair’s general rules say those bets stay subject to the standard reduction factor rules where they apply. Keeping an order live into the race is not a shield against a scratching.

If you often end up with orders sitting unmatched, our guide on fixing and avoiding unmatched bets covers the pricing habits that get you matched more reliably.

How the reduction factor changes your prices

A horse’s withdrawal changes everyone else’s chance. If the favourite is removed, the remaining runners become more likely to win, and their prices should shorten. Because your earlier bets were struck at the old prices, Betfair compensates by reducing the odds on those matched bets.

Traditional bookmakers call this adjustment Rule 4. On the exchange it is the reduction factor. We have a full explainer on the Betfair reduction factor, but the mechanics are short.

Betfair’s non-runner guidance gives the calculation: divide the decimal odds by 100, multiply by the non-runner’s reduction factor, and subtract the result from the original price to get the new price.

A worked example

Say you laid a horse at decimal odds of 5.0 (4/1). Then another runner is withdrawn with a reduction factor of 10%.

Your lay bet is now settled at 4.5 rather than 5.0. The example figures are illustrative, not from a real race. Your liability on a £10 lay falls from £40 to £35, but your potential profit is unchanged at £10. That is the point: you were laying at 5.0 against a field where the horse is now more likely to win, and the cut removes part of the value you were paid.

For lay bettors, the cut works in your favour on liability but not on the value of the bet. Laying at a shorter price means you risk less, but you also had a reason for choosing that price, and the reduction can leave you with a thinner edge than you planned.

Where to check the current factor

Betfair says you can check the current reduction factor on the market’s “info” page, or ask the Helpdesk. The horse racing rules are the reference for the non-runner conditions in each market type. Make a habit of checking the info page before a race where several horses look doubtful.

Scratchings after the off or in-play

The timing rules matter most for people who trade or lay close to the start.

Reduction factors are not applied to in-play bets. Under the exchange horse racing rules, where a withdrawal is so late that Betfair may remove the runner only after the race, only bets matched before the off are affected by a reduction factor.

Two practical consequences follow:

  1. A bet matched in-play on a horse that never actually ran is a different situation from a bet matched pre-race. Don’t assume the reduction will fix a bet you struck after the market turned in-play.
  2. A runner that is still showing in the market may already be out. If the price on one horse looks strange, check the race card and the official non-runner announcements before you lay it.

If you use the in-play window at all, our piece on Betfair’s in-play delay explains why we favour pre-race lay strategies for UK bettors.

When Betfair cannot remove a non-runner until after the race, it reconciles the Starting Price manually by applying the reduction factor to the original SP odds, as set out in the non-runner guidance. If you bet at SP, expect your settlement to follow that adjusted figure.

Why late scratchings matter more to lay bettors

Backing one horse and laying one horse look like mirror images, but a scratching treats them differently in practice.

When you back a horse, the main risk from a withdrawal elsewhere is a price cut. When you lay a horse, you are exposed to several things at once:

That last point is the least discussed. A lay selection is a judgement about one runner relative to a field. Change the field and you may change the judgement.

How to protect your lay betting from late scratchings

You cannot predict a withdrawal, but you can stop it from doing damage.

1. Check the field before you bet

Look at the race card and the declared runners shortly before you place the bet. Our dashboard links directly to the Betfair Exchange market for each signal, so you can see the live field and prices in one step.

2. Judge the market, not just the horse

A forum thread among Betfair users on handling late scratchings suggests checking the overrounds to confirm the market still looks properly formed after a withdrawal, for example a book that sits close to 100% on both the back and lay sides. We agree with the principle. After a scratching, a thin or lopsided book is a reason to wait.

3. Review open orders the moment a horse is withdrawn

Given that unmatched lay offers can be cancelled, look at your open bets as soon as a non-runner is announced. Re-enter anything you still want, at a price that makes sense for the new field.

4. Be careful with automation

Betfair’s data scientists make the point in their golden rules of automation that automation does exactly what you tell it, whether or not the market behaves the way you assumed. A bot that auto-lays into a market will keep laying after a scratching unless you have told it how to respond. If you automate, build in rules for non-runners, for a changed field size and for a large drop in the overround.

5. Keep your staking steady

A reduction can shift liability on a single race by a noticeable amount. Cap your liability per bet and per day in advance, so a late change never forces a decision under pressure. Our guide to lay betting strategy covers staking and liability in more detail, and laying the field with liability caps applies the same thinking to larger fields.

6. Prefer pre-race, planned bets

Most late scratching trouble comes from bets placed in a rush close to the off. Placing planned bets earlier, from a published list, gives you time to react to a non-runner announcement rather than discover it afterwards. Our pre-race lay alerts are built around that routine.

A quick checklist for race day

Moment What to check Why
Before placing a lay Declared runners and live field size The selection was made against a specific field
After a non-runner is announced Open and unmatched orders Unmatched lay offers may have been cancelled
After a non-runner is announced Reduction factor on the market info page Shows how far matched prices will move
Close to the off Overround on the back and lay books A thin book means a poorly formed market
Once in-play Whether any bet depends on a reduction Reduction factors are not applied to in-play bets

Where you can, compare prices across sources before you lay, since a withdrawal can leave stale prices elsewhere. We list odds comparison sites for UK lay bettors by type of use.

Our perspective

Late scratchings are the clearest example of why lay betting needs a process rather than a hunch. A selection is only as good as the field it was made against, and the field can change in the last few minutes.

That is why we publish every signal before the race, and why we track every result permanently, including the losses and the races where a withdrawal changed the picture. It happens. Transparency is the whole point.

Our approach is data-driven: signals are built from historical strike rates and live market prices, not opinion. We claim a strike rate of over 85%, and you can check the public results history rather than take our word for it. For a late scratching, the practical benefit is simple. You see the signal ahead of time, you check the field on Betfair through the dashboard link, and you decide with the current runners in front of you.

We also built the service around tooling, not just a list of picks: staking tier grading to keep liability sensible, real-time alerts by email and Telegram so a signal reaches you when it matters, and API access for traders who want to feed signals into their own software and apply their own non-runner rules.

Donkey

Using DonkeyRadar around late withdrawals

DonkeyRadar publishes lay signals for UK, Australian and US horse racing, each aimed at the runner our statistical analysis rates as most likely to lose. The Free plan gives you the daily signals at no charge. DonkeyRadar Pro costs £29 per month after a seven-day trial, and adds real-time alerts, the full results history and API access.

You can open each signal straight in the Betfair Exchange from the dashboard, check the field and any non-runners, and then place your bet with the current market in front of you. See the Free and Pro plans on DonkeyRadar.

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Profits from betting in the UK are tax-free, according to our own summary of the position, but that is no reason to stake more than you can afford. DonkeyRadar is for over 18s only. Lay betting carries real liability, so set limits before you start.

If you trade Australian races, where the market rules and field sizes differ, our Australian racing lay strategy piece applies the same discipline to those meetings. And if you want to understand how signals are modelled, read about horse racing data models. For a wider look at what works on the exchange, see our shortlist of the best Betfair strategies.

Using DonkeyRadar around late withdrawals

FAQ

What is a late scratching on Betfair?

It is a horse that was listed when the market was loaded but does not come under starter’s orders. Betfair removes it from the market and voids matched bets on it. The rules are set out in the Exchange Horse Racing Rules.

Do I lose my stake if the horse I laid is scratched?

No. Matched bets on a non-runner are voided, so your stake is returned and your liability on that horse is released. You neither win nor lose on that selection. Your bets on the other runners may be adjusted by a reduction factor.

Are my unmatched lay bets cancelled when a horse is withdrawn?

Often, yes. In the win market, reductions apply at 2.5% or greater and unmatched lay offers are cancelled. In the place market, unmatched lay offers are cancelled at 4.0% or greater. Check your open orders as soon as a non-runner is announced and re-enter any you still want.

How do I work out the new price after a reduction factor?

Divide the decimal odds by 100, multiply by the reduction factor, and subtract the answer from the original price. Betfair sets out this method in its non-runner guidance. You can see the current factor on the market’s info page.

Does a reduction factor apply to in-play bets?

No. Reduction factors are not applied to in-play bets. If a runner is withdrawn so late that Betfair can remove it only after the race, only bets matched before the off are affected.

Sources