The gambler's fallacy is the belief that a result is due because it has not happened lately: a run of losses must be made up soon, so the next bet is more likely to win. Gambling Help Online describes it as the erroneous belief that previous results can influence future random events (checked October 2026).
In betting it sounds like "this favourite is due" or "I'm due a winner", and neither line changes a chance. Its mirror image is the hot hand: expecting a winning run to keep going. The betting strategy hub lists believing a winner is due among the habits that cost money.
A racing example: the favourite that is due
Example: Illustrative chances, not a real meeting. At a nine-race meeting the favourites lose the first six races, and talk starts that race 7's favourite is due. Say every favourite that day had a 1 in 3 chance of winning.
Six favourites all losing has a chance of (2/3) x (2/3) x (2/3) x (2/3) x (2/3) x (2/3) = 64 / 729, about 8.8%, or roughly one meeting in 11. That is unusual on any one day and ordinary over a season. Race 7's favourite still has the chance its own race gives it, which its price already tries to describe. The six beaten favourites ran in other races, against other horses.
Why races and games have no memory
A run is rare before it starts, not once it has happened. Seven beaten favourites in a row has a chance of (2/3) to the power of 7 = 128 / 2,187, about 5.9%, lower than the 8.8% for six. Divide one by the other and the chance that the seventh also loses, given that six already have, is (128 / 2,187) / (64 / 729) = 2/3: exactly the chance of any favourite losing. The six losses have happened, and they change nothing about the next race.
One edge case matters. Results can share a cause: a track that suits on-pace runners, a heavy surface or a strong wind can beat several favourites for the same reason. That is information about race 7, and it can count against its favourite as easily as for it. It is never a debt owed to the next runner. Track bias covers reading it.
How the gambler's fallacy fuels chasing losses
A win that feels due makes a bigger stake feel safe, and that is the step from a losing run to chasing losses. Raising the stake after four losses changes how much rides on the fifth bet, not its chance of winning. Doubling after every loss, the martingale system, is the fallacy written down as a staking plan. Losing streaks in betting shows how long ordinary losing runs get at each price, so a run can be planned for before it arrives.
Risk: Betting involves risk. No bet is ever due, and raising stakes to win back losses puts more money through the same prices. See responsible gambling for limits and support. For free and confidential support call 1800 858 858 or visit gamblinghelponline.org.au.
The mirror error: the hot hand
The hot hand fallacy is the belief that a run of wins makes the next win more likely. A punter on a winning week raises stakes because they feel in form, or backs a team because it is on a streak. If your bets each win about 30% of the time, three winners in a row turns up 0.3 x 0.3 x 0.3 = 2.7% of the time, and the fourth bet still wins about 30%.
Form can be real. A horse that has come on with fitness, or a team with its best players back, has changed, and a price can reflect that. The fallacy is treating the streak itself as the reason. Long runs also tend to be followed by ordinary ones, the pattern called regression to the mean, which is a pull back towards average rather than a swing the other way.
Fallacy or fair reasoning: a quick check
| What you hear | Verdict | Why |
|---|---|---|
| "Six favourites have lost, the next one is due" | Fallacy | Separate races, separate chances |
| "I've lost five in a row, so I'm due a winner" | Fallacy | Your record does not change the next bet's chance |
| "I'm on a hot streak, so I'll double my stake" | Fallacy | A streak alone says nothing about the next bet |
| "The track is favouring leaders today" | Fair, if the evidence holds | A shared cause can affect the next race |
| "This team has its two best players back" | Fair | A real change, which the price may or may not reflect |