Ante-Post Grand National Guide: Odds, Entries & Calendar

The Grand National is the most famous horse race in the world, and its ante-post market is unlike any other. No other race combines a field of 40 runners, a unique handicap structure, multiple entry stages, and the genuine possibility that your horse will be balloted out before it reaches Aintree. Ante-post Grand National betting begins months before the April showpiece, and navigating the market requires a grasp of timelines, weights, and elimination rules that simply do not apply to other races.

The Aintree countdown starts with the initial entry stage and runs through several narrowing phases until the final field is confirmed. At each stage, horses drop out — voluntarily or by the ballot — and the ante-post market reprices. For bettors, the challenge is timing: strike too early and you risk a balloted-out selection with no refund; wait too long and the price you wanted has gone. This guide maps the Grand National’s unique handicap and calendar, explains the balloting process, and outlines when ante-post commitment makes sense.

How the Grand National Handicap Shapes Ante-Post Value

The Grand National is a handicap chase, which means every runner carries a weight assigned by the BHA handicapper based on its official rating. The top-rated horse carries the maximum weight, and all others carry progressively less according to the difference in their ratings. This structure is fundamental to the ante-post market because it determines which horses are likely to make the final field and, crucially, which ones will carry enough weight to affect their chance of winning.

Unlike a conditions race or a Group/Grade event where every horse carries the same weight or close to it, the Grand National handicap compresses the field. A horse rated 160 and carrying 11st 10lb has a different task to one rated 135 and carrying 10st 0lb. The weight spread — usually around 25 to 30 pounds from top to bottom — is wider than most other handicaps, which means that the handicapper’s assessment has a proportionally greater impact on each horse’s prospects.

For ante-post bettors, the handicap creates a specific challenge. When you back a horse months before the National, you are betting without knowing the final weights. The initial handicap is published in February, but adjustments can follow as horses run in preparatory races and their ratings change. A horse that wins a trial race between the initial handicap and the final weights may see its rating rise, its weight increase, and its ante-post value diminish. Conversely, a horse that underperforms in a trial may drift in the market but receive a more favourable weight.

Favourites in Jump handicaps across the UK win approximately 27 per cent of races, according to Grand National Fans. In the National itself, the win rate for favourites is lower still — the depth of the field, the unique demands of the Aintree fences, and the sheer number of runners all conspire to make this one of the most unpredictable races on the calendar. That unpredictability is the reason ante-post prices on the Grand National tend to be longer than for comparable Grade 1 chases: the market knows that the favourite’s chance is diluted by a 40-runner field and four miles of jumping.

The handicap structure also means that the Aintree countdown begins not with the first entry but with the first handicap. Before that publication, ante-post prices are based on assumptions about ratings and weights. Once the handicapper publishes, the market reprices to reality — and that moment is often the sharpest price movement in the entire ante-post cycle.

From Initial Entries to Final Declarations — The Grand National Calendar

The Grand National operates on a multi-stage entry system that stretches from late autumn to the week of the race. Each stage reduces the field, and each reduction alters the ante-post market. Understanding these stages is essential for timing your bet.

Initial entries are typically invited in October or early November, with well over 100 horses registered. This stage is broad — many trainers enter horses speculatively, with no firm commitment to running. The ante-post market at this point reflects the widest possible field, and prices on individual runners are correspondingly long. A horse at 33/1 in the initial entry market may be one that the trainer eventually diverts to a different spring target.

The first forfeit stage, usually in January, cuts the field to around 80 or 90 remaining entries. Trainers who know their horse will not be competitive — whether due to injury, rating, or change of plan — withdraw at this stage. The ante-post market tightens as speculative entries disappear, and the picture of the likely field begins to sharpen.

The second and third forfeit stages follow in February and March. By the second forfeit, the field is typically down to 60 or so. By the third forfeit — often held about three weeks before the race — the number is closer to 50. The BHA handicapper publishes initial weights between these stages, and the combination of weight revelation and progressive eliminations produces the most active period of ante-post trading.

Final declarations close 48 hours before the race. At this point, the maximum field of 40 is confirmed, along with any reserves. British racing’s total prize fund reached £194.7 million in 2025, up 3.5 per cent year-on-year according to the BHA Racing Report, and the Grand National’s own purse is among the most valuable in the Jump calendar — an incentive that ensures most horses who make the final 40 will actually line up.

For ante-post bettors, the critical windows are just before and just after each forfeit stage. Prices tend to be longest in the period before a deadline, when the field is still large and uncertainty is highest. After each cut, the market compresses as fewer runners absorb the same volume of money. The Aintree countdown is not a single event but a series of compression points, each of which reshapes the odds landscape.

Balloted-Out Runners and What It Means for Your Bet

The Grand National’s 40-runner limit means that even after the final forfeit stage, more horses may remain entered than can actually race. When this happens, the lowest-rated horses are balloted out — removed from the field not by their trainer’s choice but by the handicapper’s ranking. A horse that misses the cut is, in ante-post terms, a non-runner. And under standard ante-post rules, a non-runner means your stake is lost.

The ballot is determined by rating. The 40 highest-rated horses at the final declaration stage get in; any below that threshold do not. In most years, between two and six horses are balloted out, though the exact number varies. If your ante-post selection is on the cusp — rated just above or just below the likely cut-off — the ballot risk is real and needs to be priced into your assessment.

Some bookmakers offer Non-Runner No Bet terms on the Grand National in the final week before the race, which provides partial protection against being balloted out. But NRNB typically does not apply to bets placed months earlier, when the field is still 100-plus entries and the ballot is a distant concern. If you backed a horse in November at a long price and that horse is balloted out in April, the absence of NRNB means total loss of stake.

There is a tactical dimension to the ballot that experienced ante-post punters monitor closely. Horses near the bottom of the handicap are more likely to be balloted out, but they also carry the lightest weights — which, if they do get in, can be a significant advantage over four miles and 30 fences. Backing a lightly weighted horse at a big price is appealing, but the probability of ballot exclusion discounts the effective odds. A horse at 40/1 with a 20 per cent chance of being balloted out has effective ante-post odds closer to 32/1 once the ballot risk is factored in.

The Aintree countdown for ante-post Grand National betting is therefore not just about reading form and assessing weights. It is about managing the uniquely layered elimination process — forfeit stages, handicap revisions, and the ballot — that makes the National the most complex ante-post market in British racing. Every stage narrows the field, reprices the market, and either validates or undermines your original bet. That complexity is why many shrewd ante-post punters wait until the final weeks before the National to commit, when the field is largely settled and the ballot risk is quantifiable.