Tricast and Forecast Bets Explained: Horse Racing Betting Guide

10 min read

Forecast and tricast bets are two of the most rewarding — and most misunderstood — wager types in horse racing. Where a straightforward win bet asks you to pick one horse, a forecast bet requires you to name the first and second finishers in the correct order, and a tricast bet goes further still, demanding the first, second, and third in exact sequence. The difficulty is higher, but so is the potential return — and understanding how these bets work is the first step to using them intelligently.

This guide covers every variant of the tricast and forecast bet — straight, combination, and reverse — explains how bookmaker dividends and Computer Straight Forecast (CSF) payouts are calculated, and walks through a complete numerical example so you know exactly what you are staking and what you stand to win. Whether you are a weekend punter or a serious racing analyst, the mechanics here apply to every forecast and tricast bet you place.

What Are Forecast and Tricast Bets?

At their core, both bet types belong to the category of exacta-style wagers — bets that require you to predict not just which horse wins, but the precise finishing order of multiple horses. This is fundamentally different from an each-way bet, where you are simply backed to finish in the top two, three, or four positions without regard for exact order.

Forecast bets are accepted on any race with at least three declared runners. Tricast bets require a minimum of five runners in the field, because with fewer horses the permutations become trivially small and most bookmakers will not offer the market. Both are settled using a formula-based dividend — either the British Horseracing Authority-endorsed Computer Straight Forecast (CSF) for bookmaker bets, or pool-based pricing from the Tote's Exacta and Trifecta pools.

Why Bother with the Added Complexity?

The appeal is straightforward: the odds compound. If Horse A is 4/1 and Horse B is 6/1, a straight forecast on A then B will return considerably more than simply backing A to win. On a day where you have strong opinions about not just the winner but the likely runner-up, a forecast or tricast lets you extract maximum value from that analysis. The trade-off is a lower probability of being correct, so stake sizing and selection discipline matter considerably more than in win betting.

Types of Forecast Bets

Straight Forecast

A straight forecast asks you to pick Horse A to finish first and Horse B to finish second, in exactly that order. One stake, one combination, one payout if you are right. If the horses finish in reverse order — B first, A second — the bet loses entirely.

Reverse Forecast

A reverse forecast covers both possible orders: A first/B second, and B first/A second. Because it covers two combinations, it costs two unit stakes. Many casual bettors reach for the reverse forecast as insurance, but it is worth noting that you are paying double — so your two selections need sufficient combined value to justify the extra outlay.

Combination Forecast

A combination forecast lets you pick three or more horses and covers every possible straight forecast pairing from within that group. With three horses (A, B, C), you cover six combinations: A/B, A/C, B/A, B/C, C/A, C/B — costing six unit stakes. With four horses the number of combinations rises to twelve, and with five to twenty. Always calculate your total stake before confirming a combination forecast to avoid stake shock.

Types of Tricast Bets

Straight Tricast

A straight tricast requires you to name the first, second, and third finishers in the exact correct order. Three horses, one specific sequence. The probability of being correct is low, but the dividend — particularly in competitive handicap races — can be substantial. It is the highest-risk, highest-reward variant.

Combination Tricast

A combination tricast covers every possible ordering of your selected horses across the first three places. With three selections, that produces six combinations at six unit stakes. With four selections, the permutations jump to 24 combinations. Five selections yield 60 combinations — meaning a £0.50 each-combination tricast with five horses costs £30 in total stake before the race starts. Most experienced punters stick to three or four selections in combination tricasts to keep stakes manageable.

Combination Count Reference

Forecast vs Tricast: Key Differences

How Payouts Are Calculated

This is where many punters go wrong — they assume the payout is a simple multiplication of the win odds of the two or three horses. In reality, most UK bookmakers use the Computer Straight Forecast (CSF) formula, which was developed by the British Horseracing Authority and adopted across the industry for settling forecast and tricast bets at Starting Price (SP).

The CSF Formula

The CSF uses a mathematical formula involving the starting prices of all runners — not just your selections — to determine a fair dividend. For a straight forecast, the formula incorporates the decimal SPs of the first and second horse relative to the competitive strength of the entire field. This is why the CSF often produces a figure that does not match any simple multiplication of the two SPs. For tricasts, the calculation extends to incorporate the third SP and field composition in an equivalent pattern.

The practical implication: a finish involving two 8/1 shots in a twelve-runner field will generate a higher CSF dividend than the same finish in a six-runner race, because the formula factors in the difficulty of predicting an outcome from a larger, more competitive pool. Field size matters.

Tote Exacta and Trifecta vs Bookmaker CSF

The Tote operates its own pool-based versions: the Exacta (equivalent to a straight forecast) and the Trifecta (equivalent to a straight tricast). Tote dividends are determined by dividing the total pool among winning tickets after the operator's deduction — meaning a result with very few correct tickets can pay out substantially more than the CSF, while a popular result with a heavily backed winner can pay less. On big handicap fields with outsider finishers, the Trifecta pool regularly returns four-figure dividends on a £1 stake. Checking both the CSF and Tote pricing before placing is worthwhile on major festival days.

Non-Runner Rules

If a horse is withdrawn from the race, settlement rules vary by bookmaker. For straight forecasts and straight tricasts, most operators void the bet and return the stake when a selection is a non-runner. For combination bets, some bookmakers will pay out on any remaining winning combination from your surviving selections, while others void the entire ticket. Always review your bookmaker's specific non-runner terms before placing a combination bet on a race with late scratchings risk.

Example Walkthrough: Placing a Tricast

Strategy Tips for Forecast and Tricast Bettors

When to Use a Straight Forecast

Straight forecasts work best in small-field races (five to seven runners) where the form hierarchy is clear, and particularly in non-handicap events where a strong favourite is likely to win and one specific rival consistently acts as best-of-the-rest. Novice hurdles and conditions races often fit this profile — the pecking order is more defined, reducing the disorder of a wide-open handicap. In these scenarios, a straight forecast on the two most likely finishers can represent better value than a reverse forecast at double the cost.

When to Use a Combination Tricast

Combination tricasts deliver their best returns in competitive handicaps with ten or more runners, particularly when you can identify three horses priced between 6/1 and 16/1 that each have a legitimate chance. The Trifecta pool for major British meetings — the Cheltenham Festival, Royal Ascot, the Grand National — can be enormous, and results involving outsiders can produce extraordinary dividends. The Tote Trifecta pool for the 2024 Cheltenham Gold Cup returned over £500 to a £1 winning ticket — a return no single each-way bet on those horses could have approached.

Bankroll and Stake Discipline

The most common mistake punters make with combination tricasts is underestimating the total stake. Always calculate the full cost before confirming the bet. A five-horse combination tricast at £2 per combination costs £120 — a substantial commitment for a single race. BeGambleAware consistently notes that complex combination bets carry heightened risk of stake escalation. A practical rule: no single forecast or tricast stake should exceed 2–5% of your session bankroll, and combination tricasts with five or more selections should be placed at the minimum unit stake unless you are working with a defined budget for exotic bets.

Targeting Value in the CSF

Because the CSF formula incorporates all runners' SPs, a finish involving two mid-priced horses in a twelve-runner handicap will typically return a higher dividend than the same two horses finishing first and second in a six-runner race. Field size directly amplifies CSF returns — more runners mean each correct combination reflects greater predictive difficulty. This is why serious tricast bettors prioritise big-field handicap races at major festivals: the field size maximises the dividend even before factoring in outsider prices.

Combination Forecast as a Middle Ground

If a three-selection combination tricast feels too expensive, the combination forecast using three horses is a useful middle ground. You cover six permutations (all possible first-and-second pairings from your three selections) at six unit stakes, and only need two of your three horses to fill the first two positions in any order. This bet type suits punters who want coverage without committing to the full tricast, particularly in smaller fields where the third-place horse is harder to identify with confidence.

Why Growl Games for Horse Racing Bets

Growl Games' sportsbook covers full forecast and tricast markets on UK and Irish racing, settled to CSF at SP with fast withdrawals and no delays on combination payouts. The platform runs Tote Exacta and Trifecta pools on selected major meetings, so you can compare pool pricing against the CSF in real time and take whichever offers the better return on the day. New members can apply the welcome bonus to explore these markets with a lower initial outlay — a sensible way to build familiarity with combination bet staking before committing larger stakes.

Frequently Asked Questions

What is the difference between a forecast and a tricast bet?

A forecast bet requires you to predict the first and second finishers in a horse race in the correct order. A tricast bet extends this, requiring you to name the first, second, and third finishers in exact sequence. Forecasts need a minimum of three declared runners; tricasts require at least five. Both are available in straight form (one specific order) or combination form (all possible orders from your selections), with combination versions costing proportionally more in total stake — six combinations for three selections, twenty-four for four.

How is a Computer Straight Forecast (CSF) calculated?

The CSF is calculated using the starting prices of all runners in the race, not just your two selections. The formula weighs the decimal SP of the winner and runner-up against the competitive composition of the entire field, returning a dividend that reflects both individual prices and field strength. Larger fields and bigger-priced winners generally produce higher CSF dividends. Bookmakers settle straight forecasts and combination forecasts at the CSF dividend by default unless you specifically request Tote Exacta pricing, which uses a different pool-based settlement method.

Can I place a forecast or tricast bet on any horse race?

Most UK bookmakers accept forecast bets on races with three or more declared runners, and tricast bets on races with five or more. Some operators apply further restrictions: combination tricasts may not be offered in very small fields, and maximum selection counts on combination forecasts vary. Always check your bookmaker's horse racing terms before placing. If a horse is withdrawn after your bet is placed, settlement will follow the operator's non-runner rules — for straight bets this typically means a full void and stake return, while combination bets may be paid on any surviving winning permutation.

Is a reverse forecast the same as a combination forecast?

No. A reverse forecast covers exactly two selections in both possible orders — A first/B second, and B first/A second — costing two unit stakes. A combination forecast involves three or more selections and covers every possible straight forecast pairing from within that group. With three selections that is six combinations, not two. The reverse forecast is a specific two-horse concept, whereas the combination forecast scales to any number of horses. Confusing the two is a common mistake that leads to under- or over-estimating the cost of a bet.

What happens to a tricast if one of my selections is a non-runner?

If one of your selections is withdrawn from the race, the outcome depends on your bookmaker's specific rules. For straight tricasts, most operators void the bet and return the stake — there is no tricast without three horses finishing in their predicted positions. For combination tricasts, some bookmakers will pay on any remaining winning combination from your surviving selections if one is withdrawn, while others void the whole ticket. Review the non-runner terms in your bookmaker's horse racing rules section before placing, especially for high-value combination bets on races with late-scratchings risk.

Are tricast bets better value than each-way bets?

They serve different purposes and are suited to different race profiles. An each-way bet hedges your single selection against a place finish and is best when you strongly favour one horse but want insurance against not winning. A combination tricast suits races where you cannot identify a clear winner but believe you can name the three horses most likely to fill the frame. In large handicap fields with competitive pricing, combination tricasts can return multiples that no single each-way bet could replicate — but they require correct analysis across three horses simultaneously, making them harder to land consistently. Neither bet type is universally superior; the right choice depends on the race shape and how clear your form opinion actually is.

Sources & Further Reading

• 1 British Horseracing Authority (BHA) Official governing body of horse racing in Great Britain — racing rules, CSF methodology, and fixture administration.
  britishhorseracing.com
• 2 UK Gambling Commission — Licensing Conditions and Codes of Practice Regulatory framework governing all licensed betting operators in Great Britain, including rules on forecast and place bet display requirements.
  gamblingcommission.gov.uk
• 3 Racing Post Authoritative form guide and racing database — SP archives, form figures, race analysis, and result histories used by professional punters.
  racingpost.com
• 4 The Tote (Britbet) Operator of the UK's official pari-mutuel pools, including the Exacta and Trifecta pool bets on British racing meetings.
  tote.co.uk
• 5 BeGambleAware — Safer Gambling Guidance Independent charity providing guidance on responsible gambling practices, including stake awareness for complex combination bets.
  begambleaware.org
• 6 Wizard of Odds — Racetrack Betting Mathematics Independent gambling mathematics resource covering pari-mutuel mechanics, expected value, house edge tables, and exotic wager calculations.
  wizardofodds.com/games/racetrack-betting/