Lucky 31 Betting Explained: How the 31-Bet System Works

What Is a Lucky 31 Bet?

Source: British Race Courses 

A Lucky 31 combines five selections into 31 separate bets. This consists of 5 singles, 10 doubles, 10 trebles, 5 fourfolds, and 1 fivefold accumulator, meaning every possible combination of those five picks is covered.

Take Aintree Day 1, 9th April 2026, for example. Mange Tout won at 5/1, Koktail Divin at 3/1, Jango Baie at 1/1, Barton Snow at 7/4, and Brighterdaysahead at 13/8.

If I’d placed a £1 per line Lucky 31 across those five winners on a horse racing betting site, I would have netted £1,428.31 from a £31 stake. That’s the attractiveness of the Lucky 31. Winnings compound across all bets. 

Why Lucky 31 Betting Works (and Where It Fails)

While the Lucky 31 betting strategy looks good on paper, it has both positives and negatives. 

Coverage Through Singles

The singles act as insurance, but they don’t offer full coverage. This is something that other popular betting strategies, like the Yankee, fail to accommodate.

With these singles, even if one of my five picks wins, I win something. It may not cover my initial stake, but it’ll certainly decrease the amount I lose.

Going back to the Gameweek 31 example above. If only Brighton had won at 21/10, that single would have given me £3.10. My £31 stake would then be a £27.90 loss. The same results with a Yankee betting strategy, though, would have left me with nothing. 

High Exposure Problem

With a Lucky 31, I’m also placing 31 bets. At £1 per line, that’s £31, which is manageable. But £2 per line is £62, £3 is £93, £4 is £124, and so forth. Therefore, it can quickly get expensive.

And honestly, most of the 31 bets need multiple winners to pay out. 10 of them need at least two winners, another 10 need three, and the fourfolds and fivefolds need four or five to pay out.

If just two or more legs lose, massive parts of the structure collapse. In the same Gameweek 31 example, 24 of my 31 bets failed despite sitting on three winners. 

Understanding Probability in Lucky 31 Bets

The singles are straightforward. Each one stands on its own. However, the moment I move into doubles or above, the probabilities multiply together, and the numbers start dropping.

Say I rate the winning probability of three of my picks at 60%, 55%, and 50%. Individually, this is great. However, doubles need both to land. So 60% x 55% = 33%. Trebles take this a step further; they need all three to land. 60% x 55% x 50% = 16.5%. Adding a fourth of 45% takes this down to 7.4%, and a fifth at 40%, 3%.

That’s the trade-off with the Lucky 31. The singles and doubles are the most likely to pay out, but they don’t pay much. The trebles and above pay out the most, but aren’t likely to land. 

Risk & Bankroll Management

The exposure of Lucky 31 is what catches punters out. A bet of just £1 per line can cost £31. Now do £5 per line, and the total is already at £155.

With a £200 bankroll, I’d recommend a range of 50p to £2 per line. This works out to be £15.50 to £62 in total. £2 per line is more for “riskier” individuals with such a bankroll.

When managing such a bet, I like to look at it as 31 different bets, not a single bet. I don’t force the bet and only consider this strategy if I have 5 solid selections.

Also, standard risk rules apply. Only bet if 18+ or older, use only UKGC-licensed operators based in the UK, never chase losers, don’t follow strategies like Martingale, and expect high variance. 

When to Avoid Lucky 31 Betting

I usually avoid a Lucky 31 bet when the following occurs:

• Weak fifth selection: I never choose a fifth because I have to. If it’s not worth a single, it’s not worth 16 combinations. 
• Correlated bets: All events I bet on must be independent and not correlated with one another. 
• Poor Picks: The picks need to make sense. Choosing a Lucky 31 won’t make them better. 

Conclusion

A Lucky 31 is a unique betting structure. It offers wider coverage than most systems, like the Yankee and accumulator, but the costs are high.

What makes it attractive, however, is that not all five selections need to win. As seen in my Gameweek 31 example, only 3 of the 5 won, and I still netted a profit of £18.08. If I used an accumulator bet, this would be £0.

At the end of the day, it comes down to the picks and available odds. They need to be balanced. Taking some risks to increase the amount won on the trebles is good, but at the same time, having less risk for single coverage is also good.

Balance is the key. Try to structure a Lucky 31 in a way where both risk and opportunity are available. This is where the ‘golden’ area sits for such a method. But remember, like with all betting strategies, this does not eliminate risk.