What Is a Double Forecast Bet?
A double forecast is a betting wager that combines two separate forecast selections across two different races. To win a double forecast, you must correctly predict the first and second place finishers in both races. The returns from your winning forecast in the first race are automatically reinvested on your second race forecast, creating a cumulative bet that can produce significant returns from a modest initial stake.
Double forecasts are primarily used in horse racing and greyhound racing, though the concept occasionally appears in other sports like golf and football. They represent a middle ground between simple win bets and more complex multi-race accumulators, offering bettors the opportunity to combine their predictions across multiple events.
How Does a Double Forecast Differ From Other Forecast Types?
Understanding the distinctions between different forecast bet types is crucial for successful betting. The terminology can be confusing, particularly the difference between a "double forecast" and a "dual forecast," as these terms are sometimes used interchangeably but have distinctly different meanings.
| Bet Type | Number of Races | Finish Positions | Order Required | Difficulty |
|---|---|---|---|---|
| Straight Forecast | 1 race | 1st and 2nd | Yes (exact order) | High |
| Dual Forecast | 1 race | 1st and 2nd | No (either order) | Medium |
| Reverse Forecast | 1 race | 1st and 2nd | No (either order) | Medium |
| Double Forecast | 2 races | 1st and 2nd in each | Yes (exact order in each race) | Very High |
| Reverse Double Forecast | 2 races | 1st and 2nd in each | No (any order in each race) | High |
| Combination Forecast | 3+ races | 1st and 2nd | Flexible | Very High |
The key distinction is that a dual forecast (also called a reverse forecast) operates within a single race and allows either finishing order, whereas a double forecast spans two separate races and typically requires the correct finishing order in each race (when placed as a straight double forecast).
Which Sports Use Double Forecasts?
Double forecasts originated in and remain most popular within horse racing, where they are widely available through both fixed-odds bookmakers and the Tote (the UK's pool betting system). Greyhound racing also offers double forecasts with similar rules and mechanics.
Beyond racing, the concept has expanded to other sports. In golf, dual forecasts on tournament leaders have become increasingly popular, allowing bettors to predict which two golfers will finish in the top positions. Football occasionally features forecast-style bets, though they are less common than in racing. Formula 1 racing has introduced dual forecast markets in recent years, where bettors predict which two drivers will finish in the top two positions.
How Does a Double Forecast Bet Work?
The Mechanics of a Double Forecast
A double forecast operates as a sequential, two-stage bet. Here's how the process works:
Stage 1: You select two horses (or greyhounds) in the first nominated race and predict their finishing positions in the correct order.
Stage 2: If your first forecast wins, the entire return (including your original stake) is automatically reinvested on your second race forecast selection.
Outcome: You win the double forecast only if both individual forecasts are successful. If either forecast loses, the entire double forecast bet loses, regardless of the other race's result.
For example, imagine you place a £1 straight double forecast:
- Race 1: You select Horse A to finish 1st and Horse B to finish 2nd at odds of 4/1
- Your £1 stake returns £5 (your original £1 plus £4 winnings)
- Race 2: Your £5 is reinvested on a forecast with odds of 6/1
- Your final return is £35 (£5 × 7)
This cascading structure means that even modest odds in each race can produce substantial returns when combined.
Straight Double Forecast vs Reverse Double Forecast
The terminology here can be confusing, but the distinction is important:
Straight Double Forecast: You predict the exact finishing order in both races. Horse A must finish 1st and Horse B must finish 2nd in Race 1, AND Horse C must finish 1st and Horse D must finish 2nd in Race 2. There is only one winning outcome for each race.
Reverse Double Forecast: You select two horses in each race to finish in the top two, but the order doesn't matter. In Race 1, if you select Horse A and Horse B, you win if they finish 1st-2nd or 2nd-1st. The same applies to Race 2. This creates four possible winning combinations per race, making it easier to win but requiring a higher stake.
| Scenario | Straight Double | Reverse Double |
|---|---|---|
| Race 1: Horse A 1st, Horse B 2nd; Race 2: Horse C 1st, Horse D 2nd | WIN | WIN |
| Race 1: Horse B 1st, Horse A 2nd; Race 2: Horse C 1st, Horse D 2nd | LOSE | WIN |
| Race 1: Horse A 1st, Horse B 2nd; Race 2: Horse D 1st, Horse C 2nd | LOSE | WIN |
| Race 1: Horse B 1st, Horse A 2nd; Race 2: Horse D 1st, Horse C 2nd | LOSE | WIN |
How Many Bets Are in a Double Forecast?
This is where understanding the structure becomes essential for calculating costs and potential returns.
A straight double forecast consists of 1 bet — you are making a single prediction across two races with a specific outcome in each.
A reverse double forecast consists of 4 bets — because you are covering all possible order combinations in each race (2 combinations × 2 combinations = 4 total bets). This means if you place a £1 reverse double forecast, you are actually placing £4 in total wagers.
Similarly, if you select three horses in each race for a reverse double forecast (a "box" bet), the number of bets multiplies further:
- Three selections per race = 6 possible combinations per race
- 6 × 6 = 36 total bets in the double forecast
How Much Does a Double Forecast Cost?
Calculating Your Stake
Understanding stake calculation is fundamental to responsible betting. The cost of your double forecast depends on whether you're placing a straight or reverse double, and how many selections you include in each race.
Straight Double Forecast:
- £1 stake = £1 total cost (1 bet)
- £5 stake = £5 total cost (1 bet)
- £10 stake = £10 total cost (1 bet)
Reverse Double Forecast (2 selections per race):
- £1 unit stake = £4 total cost (4 bets)
- £5 unit stake = £20 total cost (4 bets)
- £10 unit stake = £40 total cost (4 bets)
Reverse Double Forecast (3 selections per race — "box" bet):
- £1 unit stake = £36 total cost (36 bets)
- £5 unit stake = £180 total cost (36 bets)
The multiplication occurs because each combination across the two races must be covered separately.
Understanding Unit Stakes and Total Cost
When bookmakers or betting slips reference a "unit stake" on a reverse double forecast, this refers to the amount you're wagering on each individual bet within the multiple combination.
For instance, a "£1 reverse double forecast on 2 selections in each race" means:
- You are placing 4 separate £1 bets
- Your total investment is £4
- Each of the 4 possible winning combinations would return based on the odds of those specific races
This is why reverse double forecasts can become expensive quickly if you add more selections. A £1 reverse double forecast with 4 selections in each race would cost £16 (4 × 4 combinations), while the same bet with 5 selections per race would cost £25 (5 × 5 combinations).
Double Forecast Odds and Returns
How Are Double Forecast Odds Calculated?
Double forecast odds are calculated differently depending on whether you're betting with a fixed-odds bookmaker or through a pool betting system like the Tote.
Fixed-Odds Betting: With fixed-odds bookmakers, you receive a quoted price before the race begins. This price is determined by the bookmaker's assessment of the probability of your selected horses finishing in the predicted order. The odds remain locked in regardless of how much money is wagered on the bet.
If you place a straight double forecast at odds of 4/1 in the first race and 6/1 in the second race:
- First race returns: £1 stake × 5 = £5 (including original stake)
- Second race returns: £5 × 7 = £35 total return
- Your profit: £30 (£35 minus your £1 original stake)
Pool Betting (Tote): With the Tote, the odds are not fixed in advance. Instead, all money wagered on a particular forecast goes into a pool, and the dividend (payout) is determined after the race based on the total pool and the number of winning bets. This means your return is unknown until after both races have been run.
For example, if £100,000 is wagered on a particular forecast and only 50 bets are successful, the dividend would be significantly higher than if 500 bets were successful on the same forecast.
What Returns Can You Expect?
The returns from a double forecast vary significantly based on:
- The odds in each individual race
- The number of selections in each race (for reverse doubles)
- The betting system used (fixed-odds vs pool)
- The competitiveness of the races
A typical double forecast with reasonable odds in each race (around 4/1 to 8/1) might return 15/1 to 40/1 overall. However, it's important to understand that these returns are lower than those from a straight forecast, which requires picking the exact order in a single race.
Why Are Double Forecast Returns Lower Than Straight Forecasts?
While it might seem counterintuitive, double forecasts actually offer lower odds than straight forecasts because you are making predictions across two races, which provides more opportunities for something to go wrong. A straight forecast on a single race with odds of 6/1 is more difficult to land than a double forecast where each race might be 3/1, even though the combined odds would be 9/1 (3/1 × 3/1). The difference lies in the inherent difficulty of each prediction.
Double Forecast vs Other Bet Types: A Comprehensive Comparison
Double Forecast vs Straight Forecast Double
A straight forecast double requires you to predict the exact finishing order in two separate races. It is more difficult to win than a reverse double forecast but offers better odds because there is only one winning outcome per race.
A straight double forecast is ideal if you have high confidence in the form of specific horses and can accurately predict not just which two will finish in the top two, but in what order. This requires detailed form analysis and understanding of each horse's racing style.
The advantage of a straight double is lower cost — a £1 straight double costs only £1 total. The disadvantage is lower probability of winning.
Double Forecast vs Forecast Treble
A forecast treble extends the concept to three races instead of two. You must correctly predict the 1-2 finishers in all three races for the bet to win.
| Aspect | Double Forecast | Forecast Treble |
|---|---|---|
| Number of Races | 2 | 3 |
| Difficulty | High | Very High |
| Potential Returns | Moderate to High | Very High |
| Typical Odds | 15/1 to 50/1 | 50/1 to 200/1+ |
| Straight Cost | £1 | £1 |
| Reverse Cost (2 selections) | £4 | £8 |
Forecast trebles are for experienced bettors who have identified three races where they have strong conviction about the top two finishers. The returns can be substantial, but the difficulty of winning all three is considerably higher.
Double Forecast vs Exacta and Quinella
The Tote offers alternative names and structures for similar bets:
- Exacta: A pool bet where you predict the 1st and 2nd place finishers in the exact order (equivalent to a straight forecast)
- Quinella: A pool bet where you predict the 1st and 2nd place finishers in any order (equivalent to a dual/reverse forecast)
Double forecasts can be placed as either exactas or quinellas through the Tote, depending on whether you want to specify the exact order or allow any order. The key difference from fixed-odds forecasts is that the dividend is determined by the pool rather than quoted in advance.
Common Misconceptions About Double Forecasts
"A Double Forecast Is the Same as a Dual Forecast"
This is one of the most common sources of confusion in betting terminology. These are fundamentally different bets:
- Dual Forecast (Reverse Forecast): Operates in a SINGLE race. You select two runners to finish 1st and 2nd in either order.
- Double Forecast: Operates across TWO separate races. You predict the 1-2 finishers in both races.
A dual forecast is a single-race bet that is easier to win because order doesn't matter. A double forecast is a multi-race bet that is more difficult because you must get both races correct (and typically in the correct order for a straight double).
"You Need Both Races to Win for the Bet to Settle"
This is actually correct — but understanding what happens when one race is abandoned or has non-runners is important.
If the first race is abandoned or voided:
- Your double forecast is void
- Your stake is returned in full
If the first race is won but the second race is abandoned:
- Your double forecast is void
- You receive the return from the first race as a single bet (not the full double return)
If there are non-runners in either race that affect the forecast:
- The bet may be settled according to the starting price of the non-runner
- Different bookmakers have different rules, so it's important to check before placing your bet
"Double Forecasts Always Pay More Than Win Bets"
While double forecasts do offer the potential for higher returns than simple win bets, this is not guaranteed. If the odds in each race are poor (e.g., 2/1 and 2/1), your combined return would be only 8/1, which is lower than some win bets on longer-priced horses.
The advantage of double forecasts is that they allow you to combine your conviction across multiple races and achieve higher returns from modest odds, not that they always pay more than alternatives.
When Should You Use a Double Forecast Bet?
Identifying Suitable Races
Double forecasts are most effective when you can identify specific races with clear form and predictable outcomes. Look for:
Strong Form Signals: Races where two horses are significantly better than the rest of the field. If the top two contenders are clearly separated from the third horse, a double forecast becomes more attractive.
Stable Conditions: Races where the conditions (going, distance, track bias) are likely to suit your selected horses. Changes in going or unexpected track conditions can dramatically alter form.
Smaller Fields: Races with fewer runners offer better odds for forecasts because there are fewer possible combinations. A 6-horse race offers better forecast odds than a 16-horse race.
Consistent Runners: Horses with recent consistent form are more predictable than those with erratic form. A horse that has finished in the top two in its last three races is a better forecast selection than one with varied placings.
Strategy and Bankroll Management
Stake Sizing: Never stake more than you can afford to lose. A typical approach is to limit each double forecast to 1-2% of your betting bankroll, ensuring that a losing run doesn't deplete your funds.
Combining Races: The best double forecasts often combine a race where you have high confidence with a race where you have moderate confidence. This balances the difficulty of the overall bet.
Reverse vs Straight: If you are less confident about the exact order, a reverse double forecast provides more flexibility, though it costs more. If you have strong form conviction, a straight double offers better value.
Tracking Performance: Keep records of your double forecast bets — which races you selected, the odds, the outcomes, and your overall strike rate. This data helps you identify whether double forecasts are profitable for you or whether alternative bets suit your analysis style better.
Historical Evolution of Forecast Betting
Where Did Forecast Betting Come From?
Forecast betting emerged in the early 20th century as horse racing evolved and bookmakers sought to offer more varied betting options beyond simple win and place bets. The concept aligned with the traditional betting culture of identifying the top finishers rather than just the winner.
The terminology "forecast" comes from the act of forecasting or predicting the race outcome. Early forecast bets were placed through betting slips at racecourses and with on-course bookmakers, who would calculate odds based on their assessment of the horses' chances.
The development of the Tote (Totalisator) in the 1920s revolutionized forecast betting by introducing pool betting, where odds were determined by the betting pool rather than fixed by individual bookmakers. This democratized forecast betting and made it accessible to more bettors.
Modern Forecast Betting Today
Today, forecast betting is available through multiple channels:
Fixed-Odds Bookmakers: Online and high street bookmakers offer forecast bets with quoted odds, allowing bettors to know their potential returns before placing the bet.
The Tote: The UK's pool betting system continues to offer forecasts with dividends determined by the betting pool. The Tote has also introduced variations like Exacta and Quinella with slightly different rules.
Digital Platforms: Modern betting apps and websites have made it easier to place forecast bets, with calculators to determine costs and potential returns. Some platforms even offer "forecast combinations" where you can select multiple horses and the system automatically creates all possible forecast combinations.
Global Expansion: While most prevalent in the UK and Ireland, forecast betting has expanded internationally. Countries with significant horse racing industries, such as Australia and Singapore, have adopted similar betting structures under different names (Exacta, Quinella, Trifecta).
Frequently Asked Questions
What is a double forecast bet?
A double forecast is a multi-race bet where you predict the first and second place finishers in two separate races. If you place a straight double forecast, you must predict the exact finishing order in both races. If you place a reverse double forecast, you select two runners in each race to finish 1st and 2nd in any order. The returns from the first race are automatically reinvested on the second race.
How much does a double forecast cost?
A straight double forecast costs the amount of your unit stake (e.g., £1 costs £1 total). A reverse double forecast with two selections in each race costs 4 times your unit stake (e.g., £1 unit stake = £4 total cost). If you add more selections in each race, the cost multiplies further (3 selections per race = £9 total cost; 4 selections = £16 total cost).
What's the difference between a double forecast and a straight forecast?
A straight forecast operates within a single race and requires you to predict the exact finishing order of two horses. A double forecast operates across two races and requires you to correctly predict the 1-2 finishers in both races (with the returns from the first race reinvested on the second). A double forecast is more difficult because you must get both races correct.
Can you place a double forecast on any two races?
Yes, you can place a double forecast on any two races where forecasts are available. This is typically any race with three or more runners. However, if either race is abandoned or voided before the race, your double forecast is void and your stake is returned. You should check the specific rules of your bookmaker or betting system, as some may have restrictions on which races can be combined.
How do you calculate double forecast returns?
Multiply the odds from each race together, then multiply by your stake. For example, if the first race has odds of 4/1 and the second race has odds of 6/1: (5 × 7) × £1 stake = £35 return. With pool betting (Tote), the dividend is determined after both races based on the size of the betting pool and the number of winning bets.
Is a double forecast the same as a dual forecast?
No. A dual forecast (also called a reverse forecast) operates in a single race and allows the two selected runners to finish 1st-2nd in any order. A double forecast operates across two races and requires you to predict the 1-2 finishers in both races. The terminology is often confused, but they are distinctly different bets.
What happens if one race is abandoned?
If either race in your double forecast is abandoned or voided before the race, your entire double forecast is void and your stake is returned in full. If the first race is completed but the second race is abandoned, you receive the return from the first race as a single bet (not the full double return). Different bookmakers may have slightly different rules, so check before placing your bet.
Can you place a double forecast on different sports?
Double forecasts are primarily available on horse racing and greyhound racing. Some bookmakers offer similar "forecast double" style bets on other sports like golf (predicting the top two finishers) or Formula 1 (predicting the top two drivers), but availability varies. It's best to check with your chosen bookmaker to see what forecast options are available for your sport of interest.