Do I get my money back if my horse is a non-runner in an accumulator?

Not exactly — the non-runner leg is removed from the accumulator, and your bet is recalculated on the remaining legs. A five-fold becomes a four-fold, a four-fold becomes a treble, and so on. You do not lose your entire stake, but you lose the multiplying effect of that leg. If all remaining legs win, you are paid at the reduced accumulator odds. If the non-runner was your only remaining leg, your full stake is returned.

Is NRNB the same as a void bet?

No. NRNB applies when your selected horse is declared a non-runner — the race still goes ahead, other bets settle normally, and only your bet on the withdrawn horse is voided. A void bet occurs when the entire race is abandoned or the market is cancelled for regulatory or technical reasons. The practical effect (stake returned) is similar, but the triggers are different, and understanding which applies prevents misplaced expectations.

Can I get NRNB on ante-post bets for the Grand National?

Yes, but only through specific bookmaker promotions — it is not a standard rule. Several major UK bookmakers, including bet365, Paddy Power, and Ladbrokes, typically run NRNB offers on Grand National ante-post markets in the weeks leading up to the race. However, these promotions have conditions: they may apply only within a certain date range, up to a maximum stake, and refunds may be issued as free bets rather than cash. Given that the Grand National regularly sees more than 50% of entries fail to make the final field, seeking out an NRNB offer before backing a horse ante-post is particularly important for this race.

Non-Runner Rate Trends in UK Horse Racing: What BHA Data from 2022 to 2026 Reveals

The non-runner rate in UK horse racing is lower than it has been at any point since 2022. That is a statement backed by BHA data, published quarterly, and it runs counter to the impression many bettors carry: that non-runners are a constant, uncontrollable hazard of the sport. They are not constant. The rates move, they respond to structural changes in how racing is organised, and the direction of travel since 2022 has been consistently downward.

For bettors, this trend has practical implications. A declining non-runner rate means the probability that your ante-post selection is withdrawn is lower than it was three years ago. It does not mean the risk has disappeared — horses will always be pulled from races for injury, going, and tactical reasons — but the baseline has shifted. Understanding what is driving that shift, and whether it is likely to continue, helps you assess how much weight to give non-runner risk when constructing your ante-post strategy.

The numbers say non-runners are rarer than you think. Here is what those numbers look like and what is behind them.

Non-Runner Rates 2022-2026: A Downward Trend

The BHA began publishing more granular non-runner data as part of its quarterly Racing Reports from 2022 onwards. The reports break down declared runners, actual starters, and the gap between the two — which represents the non-runner rate. Since the BHA standardised this reporting, the trend has been consistent: the rate has fallen in each successive reporting period, reaching its lowest point in the data published in the Q3 2026 Racing Report.

The absolute figures require context. Non-runner rates in UK racing have historically varied between roughly 5% and 10% depending on the season, the code (Flat vs Jump), and the type of meeting. The post-2022 decline has brought rates toward the lower end of that historical range, with some quarters recording rates below 5% on the Flat and marginally higher figures for Jump racing.

The seasonal pattern remains visible within the trend. Winter months, when going conditions are most variable and Jump racing dominates the calendar, produce higher non-runner rates than the summer Flat season. The spring festival period — Cheltenham, Aintree, Punchestown — typically shows elevated rates because trainers enter multiple horses in overlapping races and withdraw selectively based on conditions and opposition. But even within these seasonal peaks, the 2026 and 2026 rates were lower than the equivalent periods in 2022 and 2023.

The BHA has also begun publishing trainer-level non-runner data, which reveals significant variation beneath the aggregate. Some yards consistently run a high percentage of their declared entries; others have withdrawal rates two or three times the average. The aggregate trend is downward, but the distribution is wide — which means the non-runner risk on any individual bet depends heavily on which trainer is responsible for your selection.

One important qualification: the BHA’s data covers declared runners (horses confirmed at the 48-hour stage or later) and their subsequent withdrawal. It does not capture horses that were entered but not declared — the ante-post withdrawals that happen between entry and confirmation. For ante-post bettors, the relevant non-runner rate is higher than the BHA’s published figures suggest, because it includes the pre-declaration scratches that the official data does not track.

What’s Behind Fewer Non-Runners: BHA Initiatives and Field Size

The decline in non-runner rates is not accidental. The BHA has implemented a series of structural reforms designed to reduce the number of horses that are declared but do not run, and the data suggests these reforms are having the intended effect.

The most significant initiative is the optimisation of the racing programme. The BHA has worked to reduce scheduling clashes — races at different meetings running at the same time — which previously forced trainers to split entries and withdraw from one meeting in favour of another. The result is that trainers can plan campaigns with less conflict, declare with greater confidence, and follow through on a higher percentage of their entries.

Field size management has also played a role. The total number of individual horses that started at least one race in 2026 was 18,452, a 1% decline from the previous year, according to the BHA Racing Report. Flat racing saw a marginal increase in starters while Jump racing declined by 3%. The BHA has responded by adjusting race conditions, entry fees, and programme structure to encourage competitive fields — races with enough runners to sustain betting interest but not so many that late withdrawals are inevitable.

Veterinary and welfare improvements are a less visible but equally important factor. Advances in equine sports medicine, including better diagnostic imaging and recovery protocols, mean that fewer horses are withdrawn at the last minute due to undetected injuries. Trainers have access to better information about their horses’ fitness, which allows more accurate declarations and fewer morning-of-race scratches.

The going report infrastructure has improved too. More frequent course inspections, better communication of going changes, and the use of GoingStick penetrometer data give trainers earlier and more accurate information about surface conditions. A trainer who knows the going will be soft by race day can avoid declaring a firm-ground horse in the first place, rather than declaring and withdrawing later.

Lower Non-Runner Rates and the Value of NRNB Protection

A declining non-runner rate does not make NRNB less valuable — it changes the nature of its value. When non-runner rates are high, NRNB is a frequent safety net: you use it regularly because withdrawals are common. When rates are low, NRNB is a rare safety net: you use it less often, but the individual stakes involved are no smaller. The cost of an unprotected non-runner on a £50 ante-post bet is the same whether the aggregate rate is 5% or 10%. NRNB remains the only mechanism that converts that cost to zero.

There is also a behavioural dimension. Lower non-runner rates may encourage bettors to relax their use of NRNB — to assume that the declining trend makes protection unnecessary. This is a statistical error. The aggregate rate is a population-level statistic; your individual bet faces the specific risk of one horse in one race, and that risk is binary: the horse either runs or it doesn’t. A 5% aggregate rate does not mean your horse has a 5% chance of being withdrawn. It means the average across all declarations is 5%, with individual horses varying widely based on trainer, going, fitness, and race conditions.

The practical recommendation is unchanged by the trend: use NRNB on every qualifying ante-post bet. The declining non-runner rate means you will collect fewer refunds over time, but the protection it provides on the bets where it is needed is worth the same as it ever was. Insurance is not less valuable because the risk is lower — it is simply invoked less often. And when the risk materialises, the full stake is at play regardless of the aggregate statistics.

The numbers say non-runners are rarer than you think — and they are getting rarer still. The BHA’s structural reforms, veterinary advances, and programme optimisation are producing measurable results. But rarer is not gone, and the individual bet that loses to a non-runner costs exactly the same whether the trend line is rising or falling. The data provides context. NRNB provides protection. The two are complementary, not substitutes.