Flag Bets
A flag bet is a specialist horse racing multiple that combines several connected bets across four selections. It’s more complicated than a standard accumulator. That’s because it includes doubles, trebles, a fourfold and a set of single-stakes-about bets.
Here you’ll find the flag bet explained in plain English. We cover how the 23 bets are structured, how costs are worked out, and why returns can be trickier to follow than a normal multiple. You’ll also see when a flag bet may be useful, where the risks sit, and how to approach it responsibly.
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What Is a Flag Bet in Horse Racing?
Available at selected horse racing betting sites, a flag bet is a multiple bet on four horse racing selections. It’s made up of 23 separate bets, all placed at the same unit stake unless you choose otherwise.
A standard flag bet contains:
- 12 single-stakes-about bets
- 6 doubles
- 4 trebles
- 1 fourfold accumulator
That structure means it isn’t the same as a Lucky 15 bet, Yankee or simple four-horse accumulator. The key difference is the inclusion of single-stakes-about bets, often shortened to SSA. These add an extra layer to the bet because they link pairs of selections in a conditional way.
In practical terms, a flag bet suits bettors who want coverage across four horse racing picks and who understand that the total cost is much higher than placing a single accumulator. Instead of needing all four selections to win for any return, some parts can return if two or three selections win. However, the cost of entering all 23 lines must be factored into the decision.
A flag bet is usually considered an advanced multiple. It isn’t ideal for bettors who are still learning basic bet types, because settlement can be harder to follow and the total outlay can be underestimated.
How a Flag Bet Works: The 23 Bets Breakdown
A flag bet uses four selections, which we can call A, B, C and D. These could be four horses running in different races. The bet then creates combinations from those selections.
The structure is based on pairing, grouping and accumulating the selections in different ways. The doubles, trebles and fourfold are relatively straightforward. The single-stakes-about section is what makes the flag bet more distinctive.
Flag Bet Components Explained
A flag bet has 23 betting lines, and each line carries the unit stake you choose. Understanding the breakdown matters because your total cost is calculated from the number of lines, not from the number of horses.
Single-stakes-about bets
The flag includes 12 single-stakes-about bets. These are created from the six possible pairs among four selections, with two SSA directions for each pair. In simple terms, an SSA line links one selection to another so that the return from the first part can affect the stake carried into the second part. Exact settlement can vary, so check the bet rules before placing the wager.
The six pairs are A-B, A-C, A-D, B-C, B-D and C-D. Each pair creates two directions, such as A about B and B about A. These are not the same as ordinary singles, and they should not be counted as four simple win bets.
Doubles
The flag includes six doubles. These are the same six two-selection combinations: A-B, A-C, A-D, B-C, B-D and C-D.
A double wins only if both selections in that pair win. If either selection loses, that double loses.
Trebles
The flag includes four trebles: A-B-C, A-B-D, A-C-D and B-C-D.
A treble wins only if all three selections in that group win. Trebles can boost returns when several selections win, but they also increase variance because one losing leg is enough to settle the line as a loser.
Fourfold accumulator
The final line is one fourfold accumulator containing A-B-C-D. (If you’re unfamiliar with how accumulator bets work, each selection has to win for that line to return).
This is the highest-risk part of the flag bet because all four selections must win. If they do, it can contribute significantly to the overall return. If any one selection loses, the fourfold loses.
The easiest way to remember a flag bet is this: it’s a four-selection bet with 23 separate lines, built for coverage but not simplicity. You’re not placing one bet. You’re placing a package of linked bets.
Flag Bet vs. Super Flag Bet: Key Differences
A super flag bet is closely related to a standard flag bet, but it increases the number of betting units. In many betting contexts, a super flag is effectively a flag at double strength, creating 46 total betting units instead of 23.
A typical comparison looks like this:
| Bet Type | Selections | Total Betting Units | Common Structure |
|---|---|---|---|
| Flag Bet | 4 | 23 | 12 SSA, 6 doubles, 4 trebles, 1 fourfold |
| Super Flag Bet | 4 | 46 | Double the standard flag structure |
The main difference is cost and exposure. A super flag bet doesn’t make your selections more likely to win. It simply increases the amount staked across the same type of structure.
For example, if your unit stake is £1, a standard flag costs £23. A super flag using the same unit stake would cost £46. That can produce larger returns if the bet lands well, but it also doubles the amount at risk.
This is why a super flag bet should be treated with caution. If you’re considering one, check the total stake before confirming the bet and ask whether the higher outlay fits your bankroll plan. A bigger multiple does not create value by itself.
How to Calculate Flag Bet Returns
To calculate flag bet returns, you first need to understand the total stake and the individual lines. The basic cost calculation is simple:
Unit stake × 23 = Total cost of a standard flag bet
So, if you place a £1 flag bet:
£1 × 23 = £23 total stake
If you place a £0.50 flag bet:
£0.50 × 23 = £11.50 total stake
The return calculation is more involved because each winning line is settled separately. Doubles, trebles and the fourfold can be calculated in the same way as standard multiples. The SSA section needs extra care because it follows the operator’s single-stakes-about settlement rules.
For decimal odds, a standard multiple return can be estimated like this:
Stake × Odds for Leg 1 × Odds for Leg 2 = Double return
For a treble:
Stake × Odds for Leg 1 × Odds for Leg 2 × Odds for Leg 3 = Treble return
For a fourfold:
Stake × Odds for Leg 1 × Odds for Leg 2 × Odds for Leg 3 × Odds for Leg 4 = Fourfold return
The total return is the sum of all winning lines. To work out profit, subtract the total cost of the bet.
A flag bet calculator can help because it performs these line-by-line calculations automatically. This is especially useful for the SSA section, where manual settlement is easier to get wrong. When using any flag bet calculator, make sure you enter the correct odds format, unit stake and winning selections.
Flag Bet Example: Step-by-Step Walkthrough
Let’s use four generic horse racing selections. Assuming a £1 unit stake. The total cost of the flag bet is:
£1 × 23 = £23
Now suppose Horse A, Horse B and Horse C win, but Horse D loses. The fourfold loses because not all four selections won. Any treble or double containing Horse D also loses.
The standard multiple parts that win are:
| Selection | Decimal Odds |
|---|---|
| Horse A | 2.00 |
| Horse B | 3.00 |
| Horse C | 2.50 |
| Horse D | 4.00 |
The standard double and treble return from those lines is:
| Winning Line | Calculation | Return |
|---|---|---|
| A-B Double | £1 × 2.00 × 3.00 | £6.00 |
| A-C Double | £1 × 2.00 × 2.50 | £5.00 |
| B-C Double | £1 × 3.00 × 2.50 | £7.50 |
| A-B-C Treble | £1 × 2.00 × 3.00 × 2.50 | £15.00 |
£6.00 + £5.00 + £7.50 + £15.00 = £33.50
That does not include the SSA settlement, which depends on how the operator calculates single-stakes-about lines. In this outcome, SSA lines involving only A, B and C may contribute returns, while SSA lines involving D will be weakened or lost because D did not win.
This example shows why a flag bet can return even if one selection loses. It also shows why the cost matters. A £33.50 return from the standard multiple lines looks positive against a £23 cost, but the full result depends on SSA settlement and the exact rules used.
The key practical lesson is to review the whole bet, not just the best-looking winning combinations. A flag bet is a package of 23 lines, and losing lines are part of the cost.
Minimum Stakes and Total Cost of a Flag Bet
The minimum unit stake for a flag bet depends on the betting site, channel and account settings. SBO.net does not assume a universal minimum because operators can set their own stake rules.
What doesn’t change is the cost formula:
Standard flag bet cost = Unit stake × 23
Super flag bet cost = Unit stake × 46
Here are simple examples:
| Unit Stake | Standard Flag Cost | Super Flag Cost |
|---|---|---|
| £0.10 | £2.30 | £4.60 |
| £0.50 | £11.50 | £23.00 |
| £1.00 | £23.00 | £46.00 |
| £2.00 | £46.00 | £92.00 |
This is where many bettors make mistakes. They choose a unit stake that feels small, then realise the total cost is much higher because it’s multiplied across many lines.
If each-way betting is available for this type of wager, the total cost can increase further because each-way bets usually include both win and place parts. Before confirming any flag bet, check the betslip total rather than relying on the unit stake alone.
When to Use a Flag Bet: Best Situations and Strategy
A flag bet may suit certain horse racing situations, but it should not be used automatically. The structure is designed for four selections where you believe multiple horses have realistic winning chances. It’s not for random long shots grouped together for a large possible payout.
The best starting point is selectivity. A flag bet is expensive compared with a single accumulator, so the quality of each selection matters. If one leg is included only to increase the odds, it can damage many of the 23 lines.
Practical Checks Before Placing a Flag Bet
A flag bet can be useful when you want coverage across four horse racing selections, but the bet should still pass basic value, risk and bankroll checks.
Check whether all four selections deserve inclusion
Each selection appears in multiple lines. A weak pick does not affect only one part of the bet; it can damage several doubles, trebles, SSA lines and the fourfold.
Ask whether you would still consider each horse as a standalone bet. If not, it may not belong in a flag.
Compare the total cost with your bankroll
A flag bet is a 23-unit wager. That makes bankroll control more important than with a single or ordinary accumulator.
Decide your total acceptable risk first, then work backwards to the unit stake. Do not choose the unit stake first and only then discover the full cost.
Avoid using a flag bet to chase losses
Because a flag bet has many lines, it can feel like a way to recover losses quickly. That is a dangerous mindset.
No bet structure can remove racing uncertainty. If you are chasing, increasing stakes or betting emotionally, step back before placing the wager.
Understand the race conditions
Horse racing outcomes can be affected by going, draw, pace, trip, class, fitness and other race-specific factors. A flag bet does not reduce the need for analysis.
If you would not spend time reviewing the races individually, a complex multiple is unlikely to be the right format.
A flag bet may be most suitable when you have four strong opinions on a racecard and want a bet that can still return if one selection lets the line down. It’s less suitable when you’re trying to turn a very small stake into a very large return without considering probability.
Pros and Cons of Placing a Flag Bet
A flag bet has clear advantages for bettors who understand its structure. It also has drawbacks that shouldn’t be ignored.
The main benefit is coverage. Unlike a straight fourfold accumulator, a flag bet can generate returns from some two-selection and three-selection combinations. That can be appealing when you like four selections but accept that all four winning is uncertain.
It can also help disciplined bettors think in terms of combinations. Rather than focusing only on a headline payout, you can assess how many lines need to win for the bet to make sense.
However, the biggest drawback is cost. A flag bet uses 23 units, so a modest-looking unit stake can become a significant total outlay. It can also create false confidence because the bet contains many lines. More lines do not mean lower overall risk if the selections are poor or the prices are not attractive.
Key Pros and Cons of Flag Bets
A balanced view is important because a flag bet can be useful in the right setting but expensive and confusing in the wrong one.
Pro: more coverage than a fourfold
A straight fourfold needs all four selections to win. A flag bet includes doubles and trebles, so some returns may be possible when two or three selections win.
This can make it more flexible than a single accumulator.
Pro: strong returns if several selections win
Because the bet includes multiple combinations, returns can build quickly when several selections win at decent odds.
That said, larger possible returns always come with risk, and the total stake must be considered.
Con: higher total stake
The 23-line structure means a flag bet costs far more than one accumulator at the same unit stake.
If you usually stake £5 on a single bet, a £5 unit flag would cost £115, which may be far more than intended.
Con: settlement can be hard to follow
The SSA element makes a flag bet more complicated than common multiples such as doubles, trebles or Lucky 15-style wagers.
If you cannot explain how the bet settles, use a calculator, reduce your stake or choose a simpler bet type.
Con: no protection against bad selections
A flag bet can spread exposure across combinations, but it cannot turn weak picks into good bets.
If the selections are poor value, the structure only increases the number of ways you are paying to back them.
How to Place a Flag Bet Online
Placing a flag bet online is usually done through the horse racing betslip after selecting four horses. The exact layout differs by betting site, but the general process is similar.
Step 1
Choose Four Horse Racing Selections
Pick four horses from the available race markets. Make sure you understand the race conditions, odds and any market rules before adding them to your betslip.
Step 2
Open the Multiples Section
Once all four selections are on the betslip, look for the multiples or special multiples area. If a flag bet is available, it may appear alongside other multi-selection bet types.
Step 3
Select the Flag Bet Option
Choose the flag bet rather than a standard accumulator or another multiple. Confirm that the betslip shows 23 lines for a standard flag.
Step 4
Enter the Unit Stake
Enter the unit stake carefully. The betslip should multiply that stake by 23 to show the total cost.
Step 5
Review the Total Cost and Rules
Before confirming, check the total stake, potential returns display, each-way status if applicable, and any relevant settlement rules.
Step 6
Place the Bet Only If It Fits Your Plan
Confirm the wager only if it fits your bankroll, risk limits and betting plan. If the total cost feels too high, lower the unit stake or choose a simpler bet.
The most important step is reviewing the betslip total. A flag bet can look affordable if you focus only on the unit stake. The actual cost is 23 times that figure.
Flag Bet FAQs
What is a flag bet?
How much does a flag bet cost?
What is a super flag bet?
Can a flag bet win if one selection loses?
Is a flag bet the same as a Lucky 15?
Should I use a flag bet calculator?
About the author
Eric Roberts
Sports Journalist
Eric has been a sports journalist for over 20 years and has travelled the world covering top sporting events for a number of publications. He also has a passion for betting and uses his in-depth knowledge of the sports world to pinpoint outstanding odds and value betting opportunities.
About the author
Alan Penny
Editor-in-Chief
Alan hails from Northern Ireland and is an avid fan of all sports. He has been with us since 2017 and serves as SBO’s Editor-in-Chief. Alan passionately covers everything from the latest regulatory developments across the globe to tips on the latest football matches.
