Mystery bets in Australia: legal, and not matchable
Two questions come up together often enough to answer together. Are mystery bets legal in Australia, and can you do anything clever with them.
The short answers are yes and no. They are a normal exotic racing bet from licensed operators, and they are one of the few bet types that cannot be covered on an exchange no matter how good you are. The reason is worth two minutes, because it is the same reason that tells you which other bets are worth your time.
What a mystery bet actually is
Sportsbet's own help centre describes a mystery bet as a bet that randomly combines a number of different selections for exotic markets. You choose the bet type and the stake. The system chooses the runners.
It is offered on four exotic markets:
- Trifecta
- Quinella
- First 4
- Exacta
There is an Include Favourite checkbox that brings the favourite into the pool of things the system can allocate you. In the bet slip the selections show as a question mark until the bet is confirmed.
Are they legal in Australia
Yes. A mystery bet is an ordinary exotic racing bet, offered by wagering operators licensed in Australia, and there is no separate prohibition that singles it out.
The law people usually have in mind is the Interactive Gambling Act, and the restriction they are thinking of is the one on online in-play betting on sport. Racing bets placed online before a race are a different category and are permitted, which is why every licensed operator offers them openly. If you want the same treatment for the broader activity, we cover it on whether matched betting is legal in Australia.
The one term that matters most
Out of everything in the terms, one line does all the work. Sportsbet states that you will not be able to see your selections in a mystery until the bet has been confirmed.
Read that again with a matched betting hat on. You are committing a stake before you know what you have backed. Whatever you intended to do about the other side of that bet, you cannot do it, because at the moment of commitment there is no identifiable selection to act on.
Why a mystery bet cannot be matched
This is mechanical, not a question of skill or effort. Two independent reasons, either of which alone is fatal:
- There is no lay market to use. Matched betting works by laying the same outcome on an exchange so the two positions cover each other. Exchanges run win and place markets. They do not offer lay markets on trifectas, quinellas, exactas or first 4s, so for an exotic there is simply nothing on the other side to take.
- You do not know what you backed in time. Even in a world where exotic lay markets existed, the selections are hidden until after confirmation. You would be trying to cover a position whose contents you are not allowed to see until it is too late to act on them.
The working version of this is the ordinary back and lay on a single runner, where the same outcome exists on both sides and you can see it before you commit. Our free matched betting calculator works out the lay stake and liability for that, and the bonus bet calculator does the same for a bonus bet.
What to do when an offer lands on one
If a promotion can only be used on a bet type you cannot cover, the value in that promotion is not value you can lock in. It is a gamble with better than usual terms, which is a different thing from a position you can close. Price it that way, or skip it.
This is also a reasonable filter for everything else. Before committing a stake to any promotion, ask whether the same outcome exists on an exchange and whether you can see it before you commit. If the answer to either is no, there is nothing to match. The step by step walkthrough shows what a coverable offer looks like from the other direction, and the free five episode bootcamp works through real examples.
One caveat that applies to all of this rather than to mystery bets specifically: promotional access is a wasting asset, and bookmaker accounts do get restricted over time.
Frequently asked questions
Are mystery bets legal in Australia?
Yes. Mystery bets are an ordinary exotic racing bet offered by licensed Australian wagering operators, and there is no separate prohibition on them. Placing a racing bet online before the race is permitted; the Interactive Gambling Act restriction people usually have in mind applies to online in-play sports betting, which is a different thing.
What is a mystery bet?
It is an exotic bet where the operator's system picks your runners at random instead of you choosing them. Sportsbet's help centre describes it as randomly combining selections for exotic markets, and offers it as a trifecta, quinella, first 4 or exacta.
Can you see your selections before the bet is placed?
No. Sportsbet states plainly that you will not be able to see your selections in a mystery until the bet has been confirmed. That single term is what makes the bet type impossible to match.
Can you matched bet a mystery bet?
No, and this is mechanical rather than a matter of skill. Matched betting requires laying the same outcome on an exchange to cover it. Exchanges do not offer lay markets on trifectas, quinellas, exactas or first 4s, so there is nothing to lay, and you could not identify what to lay anyway because the selections are hidden until after confirmation.
What does the Include Favourite option do?
It is a checkbox in Sportsbet's mystery bets section that includes the favourite among the randomly allocated selections. It changes what the system can pick for you. It does not let you see the selections before confirming, and it does not make the bet coverable.
Why can I not find mystery bets on a race page?
Sportsbet's help centre notes that mystery bets are hidden while the More Places toggle is enabled on the race page. Turning that toggle off makes the mystery bets section visible again near the bottom of the page.
Do bonus bets and promotions work the same way on mystery bets?
Treat any promotion on a mystery bet as ordinary gambling rather than as promotional value you can extract, because the outcome cannot be covered. If an offer can only be used on a bet type you cannot lay, the value of that offer is not something you can lock in.
Written by the YAUPICKS team. Last reviewed September 2026.
Gambling involves risk. Matched betting is a strategy that aims to reduce outcome risk, not eliminate it. Losses are possible, particularly through human error, and bookmakers may restrict or close accounts at their discretion. YAUPICKS is an education and community platform operated by YAUPICKS PTY LTD (ABN 40 673 940 228). We are not a bookmaker, a casino or a financial services provider, and no wagers, deposits or withdrawals occur on this site. Nothing here is legal, tax or financial advice. You must be 18 or over. If gambling is causing you harm, contact Gambling Help Online on 1800 858 858 or self exclude from all Australian licensed online wagering services through BetStop, the National Self-Exclusion Register. See our responsible gambling page.