Is arbitrage betting legal in Australia?
- Arbitrage betting is legal in Australia: it's ordinary betting with licensed bookmakers.
- Bookmakers are allowed to limit or close accounts under their terms, and they sometimes do this to arbitrage bettors.
- Most recreational punters don't pay tax on winnings, but the position can change if betting becomes a business.
- Only use licensed Australian bookmakers, and never bet online on a sports match once it has started.
Is arbitrage betting legal in Australia? Yes. Arbitrage betting is simply placing ordinary bets with licensed bookmakers, choosing prices so that every outcome is covered. There's no law against backing both sides of a match, and no law against using software to compare prices. What people usually mean when they ask is something slightly different: will bookmakers let me do it, what happens with tax, and are there rules I could break without realising? This guide answers each of those in plain English.
Is arbitrage betting legal in Australia?
Arbitrage betting is legal for adults in Australia. Each bet you place is a normal bet with a bookmaker, placed at the price that bookmaker is offering. Spreading bets across several bookmakers so that every outcome is covered doesn't change that.
It also isn't cheating or match fixing. You aren't influencing the event, using inside information or colluding with anyone. You're taking prices that bookmakers have published, which anyone can compare.
Where people get into trouble is not the method but the operator. Placing bets with an unlicensed offshore website is risky: those sites aren't allowed to offer services to Australians, and if something goes wrong with your money you have little protection. Stick to bookmakers licensed in Australia.
How do you check a bookmaker is licensed?
The Australian Communications and Media Authority (ACMA) explains how to check whether a gambling operator is legal to use in Australia. Licensed bookmakers show their state or territory licence details, usually in the website footer, and they must follow Australian consumer protection rules.
A quick checklist before you open an account:
- Licence details are shown and match a state or territory regulator.
- The site offers BetStop information and responsible gambling tools such as deposit limits.
- Identity verification is required before you can withdraw. Licensed bookmakers must verify who you are.
- No credit cards. Australian law bans online wagering with credit cards, so a site offering them is a red flag.
Arbitrage betting works fine with licensed bookmakers alone. There are plenty of them, and they price enough events for locks to appear every day.
Can bookmakers limit or ban arbitrage bettors?
Yes. This is the part that surprises people. Bookmakers are businesses that decide which bets they accept, and their terms usually allow them to limit stakes or close accounts at their discretion.
An account that regularly takes a bookmaker's best prices, often on smaller markets, can be flagged and limited. That isn't a legal penalty and you haven't broken any law: the bookmaker is simply choosing not to take large bets from you.
Arbitrage bettors usually handle this by:
- spreading bets across several licensed bookmakers rather than relying on one
- avoiding oddly precise stake sizes where rounding costs little
- keeping a record of every bet so any dispute can be checked quickly
If a bookmaker limits you, your existing bets stand and your balance is still yours to withdraw.
Are arbitrage winnings taxed in Australia?
For most people, no. The Australian Taxation Office's ruling IT 2655 explains that the winnings of an ordinary punter generally aren't assessable income, and that it's rare for someone with no other connection to racing to be treated as carrying on a business of betting.
The position can be different if your betting looks like a business: systematic, organised, large in scale and run to make a living. Arbitrage betting done in a structured way can raise that question, so if betting becomes a major part of your income it's worth speaking to a registered tax agent.
The ATO's page on prizes and gambling winnings covers related situations, including winnings paid in crypto assets. Keeping clear records of every bet, deposit and withdrawal makes any conversation with the ATO or an accountant far easier.
What rules should arbitrage bettors know about?
A few rules affect how arbitrage betting works day to day in Australia.
- In-play betting online isn't allowed. Licensed bookmakers can't take online bets from Australians on a sports match once it has started; those bets are only allowed over the phone. Locks should be placed before the event begins.
- You must be 18 or over, and bookmakers verify your identity.
- Bookmaker terms apply. Rules on obvious pricing errors (sometimes called palpable errors), dead heats, abandoned matches and retirements in tennis can change how a bet settles. Read them for the markets you use most.
- BetStop applies everywhere. If you register with BetStop, the National Self-Exclusion Register, every licensed bookmaker must stop taking your bets.
None of these stop you from arbitrage betting, but knowing them avoids surprises when a bet settles differently from what you expected.
A checklist for staying on the right side
Put simply, legal arbitrage betting in Australia looks like this:
- Use only licensed Australian bookmakers, and check each one before you deposit.
- Place every leg before the event starts.
- Check each price on the bet slip before you confirm, and size later legs to what was actually accepted.
- Keep records of bets, deposits and withdrawals.
- Treat it as a process, not a way to chase losses, and set deposit limits you're comfortable with.
Tools like AUOdds help with the time-sensitive part: finding locks across Australian bookmakers the moment they appear and showing the exact stake for each outcome, so you can place both legs quickly and accurately.
Frequently asked questions
Is arbitrage betting illegal in Australia?
No. Arbitrage betting is legal for adults in Australia because every bet is an ordinary bet with a bookmaker. Use licensed Australian bookmakers only; ACMA explains how to check whether a gambling operator is legal to use.
Can a bookmaker refuse to pay out an arbitrage bet?
A bookmaker can't refuse to pay a valid winning bet just because you also backed the other side elsewhere. It can, however, void bets placed at an obvious pricing error under its terms, and it can limit your account for future bets.
Will I get banned for arbitrage betting?
You won't face any legal penalty, but bookmakers can limit stakes or close accounts under their terms. Spreading bets across several licensed bookmakers and keeping stake sizes natural helps accounts stay active for longer.
Do I have to declare arbitrage winnings to the ATO?
Most recreational punters don't pay tax on gambling winnings, as ATO ruling IT 2655 explains. If your betting is run like a business, the position can differ, so speak to a registered tax agent if betting becomes a large part of your income.
Is using arbitrage software allowed?
Yes. Comparing publicly available prices, by hand or with software, is allowed. What matters is where you place the bets: use licensed Australian bookmakers and place every bet yourself, before the event starts.
Sources
- Check if a gambling operator is legal, Australian Communications and Media Authority
- Taxation Ruling IT 2655: gambling and betting winnings, Australian Taxation Office
- Crypto asset prizes and gambling winnings, Australian Taxation Office
- BetStop: the National Self-Exclusion Register, Australian Communications and Media Authority
More guides
18+ only. Betting involves risk, and prices and limits can change before you place a bet. If gambling isn't fun any more, Gambling Help Online (1800 858 858) is free and confidential, and BetStop lets you exclude yourself from every licensed Australian bookmaker.