What Is a Lucky 31 Bet? The Complete Guide to Structure, Bonuses & Strategy
A Lucky 31 is a full-cover combination bet on five selections that comprises 31 individual bets: 5 singles, 10 doubles, 10 trebles, 5 four-fold accumulators, and 1 five-fold accumulator. The bet's appeal lies in its dual nature: the singles component guarantees a return if even one selection wins, while the accumulators create exponential returns when multiple selections win. At £1 per line, a Lucky 31 costs £31; at 10p per line, it costs just £3.10, making it accessible to bettors across all budget levels.
The Lucky 31 is particularly popular in horse racing and greyhound racing, where punters often identify five strong selections across a day's card. Unlike pure accumulators that require all selections to win, the Lucky 31 offers a safety net—your singles always provide a return if just one pick comes through. Combined with generous bookmaker bonuses (often 2–4x odds for a single winner, or 10–20% bonus if all five win), the Lucky 31 has become a staple of UK betting culture.
What Is a Lucky 31 Bet? (Definition & Core Structure)
The Basic Definition
A Lucky 31 is a full-cover multiple bet that automatically creates all possible combinations from five selections. When you place a Lucky 31, you're not placing just one bet—you're placing 31 separate bets simultaneously, each with its own odds calculation and potential return. The "31" refers to the total number of bets, and the "Lucky" refers to the bookmaker bonuses applied in certain winning scenarios.
The fundamental appeal is straightforward: with a single stake amount, you gain exposure to multiple betting combinations. A £1 Lucky 31 costs £31 because your £1 unit stake is multiplied across all 31 bets. This structure means that even if not all selections win, you still have winning bets through the singles component and any doubles or trebles that land.
How the 31 Bets Break Down
The 31 bets in a Lucky 31 are composed of four distinct types:
| Bet Type | Number of Bets | Composition |
|---|---|---|
| Singles | 5 | Each selection individually (1 winner needed) |
| Doubles | 10 | Every pair of selections (2 winners needed) |
| Trebles | 10 | Every combination of three selections (3 winners needed) |
| Four-Folds | 5 | Every combination of four selections (4 winners needed) |
| Five-Fold | 1 | All five selections together (5 winners needed) |
| Total | 31 | — |
Each of these bets is independent. If you place a £1 Lucky 31, you're placing £1 on each single, £1 on each double, £1 on each treble, and so on. The odds for each bet are calculated by multiplying the odds of the constituent selections. For example, a double combining selections at 3.0 and 4.0 would be priced at 12.0 (3.0 × 4.0).
Where Did the Lucky 31 Come From? (History & Evolution)
Origins in Traditional Betting
The Lucky 31 didn't emerge from nowhere—it evolved from decades of betting innovation. The story begins with the Yankee bet, a full-cover wager on four selections containing 11 bets (6 doubles, 4 trebles, 1 four-fold). The Yankee was popular among experienced bettors but lacked a safety net; if all four selections didn't produce at least two winners, you'd get nothing back.
To address this gap, bookmakers introduced the Lucky 15 in the mid-20th century. By adding five singles to the Yankee's 11 bets, the Lucky 15 (15 bets total on four selections) suddenly offered a return even if just one selection won. This innovation proved wildly successful. Bookmakers sweetened the deal with bonuses: double odds if one selection won, and a percentage bonus if all four won.
The Lucky 31 was the natural next step. By extending the concept to five selections, bettors could gain greater coverage (five singles instead of four) while maintaining the same safety-net principle. The 31-bet structure (5 singles + 10 doubles + 10 trebles + 5 four-folds + 1 five-fold) became the standard, and bookmakers again applied bonuses to make the bet attractive. The "Lucky" prefix became synonymous with these bonused combination bets.
Why Bookmakers Embraced the Lucky Bets
Bookmakers recognized that Lucky bets served multiple purposes: they attracted casual bettors (via the singles safety net), they increased bet volume (more bets per wager), and they allowed for creative bonus marketing. A punter placing a Lucky 31 with a one-winner bonus is more likely to return and try again, especially if they experience a consolation win.
The Lucky family expanded further with the Lucky 63 (six selections, 63 bets), and modern betting platforms now offer Lucky bets as standard across most online bookmakers. The bonuses have become competitive selling points, with some bookmakers offering enhanced odds or additional bonuses during promotional periods.
How Does a Lucky 31 Bet Work? (Mechanics & Calculation)
The Full-Cover Mechanism
The term "full-cover" is critical to understanding why the Lucky 31 is structured the way it is. A full-cover bet ensures that every possible combination of selections is represented in the bet slip. This means no selection is "wasted"—each one contributes to multiple bets across different levels.
Consider five selections: A, B, C, D, and E. A full-cover bet on these five selections includes:
- A alone, B alone, C alone, D alone, E alone (singles)
- A+B, A+C, A+D, A+E, B+C, B+D, B+E, C+D, C+E, D+E (doubles)
- A+B+C, A+B+D, A+B+E, A+C+D, A+C+E, A+D+E, B+C+D, B+C+E, B+D+E, C+D+E (trebles)
- And so on through four-folds and the five-fold
This full-cover approach has a crucial advantage: the singles component means you're guaranteed a return if at least one selection wins. Unlike a pure accumulator (which requires all selections to win), a Lucky 31 provides a safety net. If four selections lose but one wins, your single on that winner still returns something.
Calculating Your Stake
The mathematics of a Lucky 31 stake is simple:
Total Stake = Unit Stake × 31
If your unit stake is £1, your total stake is £31. If your unit stake is 50p, your total stake is £15.50. If your unit stake is 10p, your total stake is £3.10. If your unit stake is £5, your total stake is £155.
Many bettors prefer smaller unit stakes (10p or 20p) to keep the total outlay manageable while maintaining full coverage. This approach is especially popular in horse racing, where bettors might identify five selections and place a 10p Lucky 31 rather than a £1 version.
How Winnings Are Calculated
Calculating returns from a Lucky 31 is complex because you need to compute returns from all 31 individual bets and sum them. This is why bet calculators are essential tools for Lucky 31 bettors. However, understanding the principle is valuable.
Worked Example:
Assume a £1 Lucky 31 with the following outcomes:
- Selection A (3.0): WINS
- Selection B (4.0): WINS
- Selection C (5.0): WINS
- Selection D (2.5): Loses
- Selection E (6.0): Loses
Returns from winning bets:
| Bet Type | Winning Bets | Calculation | Return |
|---|---|---|---|
| Singles | A, B, C | £1 × 3.0 + £1 × 4.0 + £1 × 5.0 | £12.00 |
| Doubles | A+B, A+C, B+C | £1 × (3.0 × 4.0) + £1 × (3.0 × 5.0) + £1 × (4.0 × 5.0) | £47.00 |
| Trebles | A+B+C | £1 × (3.0 × 4.0 × 5.0) | £60.00 |
| Four-Folds | None | — | £0.00 |
| Five-Fold | None | — | £0.00 |
| Total Return | — | — | £119.00 |
| Profit | — | £119.00 − £31.00 | £88.00 |
This example shows how three winners create significant returns through the accumulator effect. The treble alone (£60) nearly covers the entire £31 stake, while the singles and doubles add substantial additional returns.
What Are the Advantages of a Lucky 31? (Benefits & Safety Net)
The Safety Net of Singles
The most significant advantage of a Lucky 31 is the singles component. Unlike a pure five-fold accumulator (which requires all five selections to win and returns nothing otherwise), a Lucky 31 guarantees a return if at least one selection wins.
This psychological and practical benefit cannot be overstated. A bettor who identifies five selections with 60% confidence in each has a reasonable chance of at least one winning. With a Lucky 31, that single winner produces a return. With a five-fold accumulator, that same scenario produces a complete loss.
For example, a single selection priced at 5.0 would return £5 on a £1 stake—a small profit, but a profit nonetheless. While this single return rarely covers the full £31 stake, it provides a crucial buffer against total loss.
Exponential Returns from Multiple Winners
The flip side of the safety net is the exponential potential when multiple selections win. Two winners create doubles; three winners create trebles, doubles, and singles; four winners create four-folds, trebles, and doubles; and five winners unlock the full power of the five-fold accumulator.
This leverage effect means that a small stake can generate outsized returns. In the worked example above, three winners at modest odds (3.0, 4.0, 5.0) produced an £88 profit on a £31 stake—a 284% return. This potential for exponential growth is why experienced bettors are drawn to Lucky 31s, especially in horse racing where they might have high-confidence selections.
Bookmaker Bonuses
Bookmakers sweeten the Lucky 31 deal through bonuses applied in specific scenarios:
| Scenario | Typical Bonus | Examples |
|---|---|---|
| All 5 selections win | 10–20% of returns | £100 return becomes £110–£120 |
| Exactly 1 selection wins | 2x–4x odds on that single | £5 single becomes £10–£20 |
| Exactly 4 selections win | 10% bonus (varies by bookmaker) | £200 return becomes £220 |
| No selections win | None | £0 |
These bonuses are a major incentive. A punter who gets just one winner might receive 2x or 3x odds, turning a small return into a more meaningful one. If all five selections win, the bonus percentage can add £50–£100+ to the return, depending on the odds.
Important note: Bonus terms vary significantly between bookmakers. Before placing a Lucky 31, check the specific terms at your chosen bookmaker, as some may offer enhanced bonuses during promotions or have restrictions (e.g., bonuses only on win bets, not each-way).
How Does a Lucky 31 Compare to Other Bets? (Comparisons)
Lucky 31 vs. Lucky 15
The Lucky 15 and Lucky 31 are siblings in the Lucky betting family, differing primarily in selection count:
| Factor | Lucky 15 | Lucky 31 |
|---|---|---|
| Selections | 4 | 5 |
| Total Bets | 15 | 31 |
| Composition | 4 singles, 6 doubles, 4 trebles, 1 four-fold | 5 singles, 10 doubles, 10 trebles, 5 four-folds, 1 five-fold |
| Cost at £1 stake | £15 | £31 |
| Cost at 10p stake | £1.50 | £3.10 |
| One-Winner Bonus | 2x–3x odds | 2x–4x odds |
| All-Winners Bonus | 10–15% | 10–20% |
| Best For | Bettors with 4 confident selections | Bettors with 5 confident selections |
When to use each: Choose a Lucky 15 if you have four strong selections and want lower cost with simpler calculation. Choose a Lucky 31 if you've identified five selections and can afford the doubled cost for greater coverage and higher potential returns.
Lucky 31 vs. Lucky 63
The Lucky 63 is the next step up in the Lucky family, covering six selections with 63 bets:
- Lucky 31: 5 selections, 31 bets, £31 cost at £1 stake
- Lucky 63: 6 selections, 63 bets, £63 cost at £1 stake
The Lucky 63 offers greater coverage but at double the cost. The bonus structure is also more generous: a Lucky 63 typically offers up to 5x odds for a single winner (vs. 4x for Lucky 31). The Lucky 63 is ideal for horse racing days with six races or more, where you have six selections.
Lucky 31 vs. Canadian/Super Yankee
A Canadian bet (also called a Super Yankee) uses five selections but contains only 26 bets: 10 doubles, 10 trebles, 5 four-folds, and 1 five-fold. It has no singles.
This means a Canadian bet requires at least two selections to win to produce any return. A Lucky 31, with its five singles, guarantees a return if just one selection wins. For this reason, the Lucky 31 is generally considered safer and more beginner-friendly than a Canadian bet, despite both covering five selections.
When Should You Use a Lucky 31? (Strategy & Use Cases)
Ideal Scenarios for Lucky 31 Betting
The Lucky 31 shines in specific betting situations:
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Horse racing with five or more races: If a race card has five races and you've identified a strong selection in each, a Lucky 31 provides full coverage.
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Moderate odds across selections: If your five selections are priced between 3.0 and 6.0, a Lucky 31 is ideal. You have a reasonable chance of multiple winners, and the odds are high enough to generate significant returns.
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Mixed confidence levels: If you're highly confident in two or three selections and moderately confident in the others, a Lucky 31 works well. The singles ensure a return from your confident picks, while the accumulators provide upside if the others land.
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Budget-conscious betting: Using a 10p or 20p unit stake keeps the total outlay low (£3.10 or £6.20) while maintaining full coverage.
Break-Even Analysis
A critical question for Lucky 31 bettors is: How many winners do I need to break even? The answer depends entirely on the odds of your selections.
Scenario 1: Favorites (all at 2.0)
- Single winner at 2.0 returns £2.00 on a £1 stake—nowhere near the £31 cost
- Two winners at 2.0 each: doubles return £4.00; singles return £4.00; total ~£8.00—still short
- Three winners needed to cover the £31 stake
Scenario 2: Mixed Odds (3.0, 4.0, 5.0, 6.0, 7.0)
- Single winner at 3.0 returns £3.00—short of £31
- Two winners at 3.0 and 4.0: singles (£7), double (£12), total ~£19—still short
- Two winners at longer odds (e.g., 6.0 and 7.0) could break even; three winners almost certainly will
Scenario 3: Long Odds (all at 10.0)
- Single winner at 10.0 returns £10.00—short of £31 but closer
- Two winners at 10.0 each: singles (£20), double (£100), total £120—significant profit
Key insight: The longer the odds of your selections, the fewer winners you need to break even. If all selections are short-priced favorites, you'll need three or four winners. If you've selected longer-odds horses, two winners might suffice.
When NOT to Use a Lucky 31
Conversely, avoid Lucky 31s in these situations:
-
All selections are short-priced favorites (under 2.5): You'll need three or four winners just to break even, reducing your profit margin.
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Limited budget: A £1 Lucky 31 costs £31. If your budget is tight, a Lucky 15 (£15) or even single bets might be more appropriate.
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Low confidence in selections: If you're less than 40% confident in each selection, the odds of multiple winners drop significantly, and a Lucky 31 becomes an expensive proposition.
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Volatile or unpredictable events: In sports where upsets are common, the safety net of singles might not be enough to offset the cost.
What Are Common Misconceptions About Lucky 31s? (Myths & Clarifications)
Misconception 1: "One Winner Guarantees Profit"
Many new bettors assume that because a single winner produces a return, they'll make a profit. This is incorrect. A single selection at 3.0 returns £3.00 on a £1 stake, but your Lucky 31 cost £31. You've actually lost £28.
Reality: One winner produces a return, but that return rarely covers the full stake. Only at very long odds (e.g., 30.0+) would a single winner produce a profit on a £1 Lucky 31. The singles component is a safety net, not a profit engine.
Misconception 2: "All Winners = Guaranteed Jackpot"
While all five selections winning is certainly lucrative, the actual return depends on the odds. Five selections at 2.0 each produce a five-fold of 32.0, returning £32 on a £1 stake—a profit of only £1 after the £31 cost. Add the bonus (typically 10–20%), and you might make £3–6 profit.
Reality: All five winners is excellent, but don't expect life-changing returns unless the odds are generous. The real potential lies in four or five winners at longer odds.
Misconception 3: "You Need All 5 Selections to Win"
This is the most common misunderstanding. New bettors sometimes confuse a Lucky 31 with a five-fold accumulator and assume all selections must win.
Reality: The singles component means you only need one winner for a return. Two or three winners often produce a profit. This is the defining advantage of a Lucky 31 over a pure accumulator.
How Do You Place and Calculate a Lucky 31? (Practical Guide)
Placing a Lucky 31 Bet
Online:
- Log into your betting account
- Select your five outcomes (e.g., five horses from five different races)
- Add them to your bet slip
- Select "Lucky 31" from the bet type menu
- Enter your unit stake (e.g., £1, 50p, 10p)
- Review the total stake (unit stake × 31)
- Confirm and place the bet
In a Betting Shop:
- Fill out a betting slip with your five selections
- Write "Lucky 31" next to your selections
- Specify your unit stake
- Hand the slip to the cashier
- Pay the total stake (unit stake × 31)
Each-Way Option: If you select "each-way," you're doubling your stake: half on a win Lucky 31, half on a place Lucky 31 (typically at ¼–⅕ odds). A £1 each-way Lucky 31 costs £62 total. This increases your chances of a return but significantly raises the cost.
Using a Lucky 31 Bet Calculator
A Lucky 31 bet calculator is essential for computing returns. Most betting sites (AceOdds, BetHQ, MyBettingSites) offer free calculators. To use one:
- Enter your unit stake (e.g., £1)
- Input the odds for each of your five selections
- Select which selections won (or lost)
- The calculator computes returns from all 31 bets automatically
- It applies bookmaker bonuses if applicable
Manual calculation is impractical due to the 31 different bet combinations. Always use a calculator to verify your potential returns before placing a bet.
What's the Future of Lucky 31 Betting? (Trends & Outlook)
Digital Innovation in Lucky Betting
The rise of mobile betting apps and live betting has transformed how punters engage with Lucky 31s. Modern betting platforms now feature:
- One-click Lucky 31 placement: After selecting five outcomes, placing a Lucky 31 is instant
- Real-time bet tracking: Apps update returns as events conclude, allowing bettors to see their winnings in real time
- Integrated calculators: Many apps include calculators within the betting slip itself
- Live odds updates: Bettors can see how their Lucky 31 is performing as events unfold
These innovations have made Lucky 31s more accessible to casual bettors who might have previously found the 31-bet structure intimidating.
Changing Bonus Structures
Bookmakers continue to evolve their Lucky 31 bonus offers. Recent trends include:
- Enhanced odds promotions: Some bookmakers offer boosted odds on specific Lucky 31s during major racing events
- Loyalty bonuses: Regular bettors might receive additional bonuses on Lucky 31s as part of loyalty programs
- Accumulator bonuses: Some bookmakers now apply bonuses to Lucky 31s that combine with other bet types
As competition between bookmakers intensifies, the bonus structures on Lucky 31s are likely to become even more generous, making them an increasingly attractive option for UK bettors.
Frequently Asked Questions
Q: What's the cheapest Lucky 31 I can place? A: Most bookmakers allow unit stakes as low as 5p or 10p. A 5p Lucky 31 costs £1.55 total; a 10p Lucky 31 costs £3.10. This makes Lucky 31s accessible even to bettors with modest budgets.
Q: Can I place a Lucky 31 on football matches? A: Some online bookmakers offer Lucky 31s on football, but they're primarily available on horse racing and greyhound racing. Check your bookmaker's terms to confirm availability for your chosen sport.
Q: Do Lucky 31 bonuses apply to each-way bets? A: Typically, bonuses apply only to the win part of each-way bets, not the place part. Check your bookmaker's specific terms, as this varies.
Q: What happens if one of my selections is a non-runner? A: If a selection is a non-runner, it's treated as a void bet. Your stake on that selection is returned, and the Lucky 31 is recalculated with the remaining four selections (effectively becoming a Lucky 15).
Q: Is a Lucky 31 better than placing five separate bets? A: A Lucky 31 and five separate bets cost the same (£31 at £1 stakes) but offer different outcomes. A Lucky 31 creates all combinations, offering better returns if multiple selections win. Five separate bets are simpler but don't capture the leverage of accumulators.
Q: Can I place a Lucky 31 as a system bet? A: Some bookmakers allow Lucky 31s as part of system bets, where you place multiple Lucky 31s with different selection combinations. This is an advanced strategy and varies by bookmaker.
Last updated: January 2025