Qualifying bet (definition): A qualifying bet is the first cash bet you place at a bookmaker to unlock a sign-up bonus or free bet promotion. In matched betting we back the selection at the bookmaker and lay the same selection at Betfair, locking in a small qualifying loss of around 2%–8% of stake regardless of the outcome. Once the bet settles, the bonus is credited and we extract roughly 70%–80% of its value as guaranteed profit.
In the Matched Betting Guide we explained that qualifying bets should be placed at low odds. In this section we will explain why this is done.
With every bookmaker offer we will go through the same process – back at the bookmaker and lay at the exchange. This becomes standard practice, and allows us to qualify for our bonus bets or cash. Hence the term qualifying bets.
With each qualifying bet we will incur a small loss known as a qualifying loss. Our aim is to keep this as low as possible to maximise our profit.
Worked $50 qualifying bet example
Let's run through the numbers on a typical $50 deposit-and-bet offer:
- Bookmaker offer: deposit $50, bet $50, receive a $50 bonus bet
- Selection back odds at the bookmaker: 2.00
- Selection lay odds at Betfair: 2.04 (5% commission)
- Calculator mode: Normal
- Lay stake required: ~$49.02
- Liability needed in Betfair: ~$50.99
Result: a qualifying loss of approximately $2.00 (4% of stake). The $50 bonus bet then arrives in your bookmaker account. Using Free Bet (SNR) mode in the calculator, you place that bonus bet at higher odds (around 4.00–6.00) and lay it at Betfair to extract roughly $37.50 (75% of $50).
Net profit on the offer: $37.50 extracted – $2.00 qualifying loss = $35.50 guaranteed profit from the $50 sign-up offer.
How to minimise your qualifying loss
Qualifying loss is unavoidable, but you can keep it tight by choosing the right markets:
- Use the lowest odds the offer allows — usually 1.50 minimum. Lower odds shrink your Betfair liability and reduce the back/lay spread
- Pick liquid markets — major football, NRL, AFL, tennis and racing have tighter spreads than niche events
- Bet close to event start — exchange liquidity peaks in the final hour, narrowing the gap between back and lay odds
- Avoid in-play markets for qualifying bets — odds move fast and partial matches can leave you exposed
- Check the calculator before every bet — if the qualifying loss is above 8%, find a different market
- Use Betfair commission-discounted markets where available
Qualifying bet vs free bet vs bonus bet
These three terms get used interchangeably but mean different things in matched betting:
- Qualifying bet — your own cash, stake returned with winnings, used to unlock a promotion. Calculator mode: Normal. Expected outcome: small loss (2%–8%).
- Free bet / Bonus bet (SNR) — credited by the bookmaker, stake NOT returned with winnings. The most common Australian bonus type. Calculator mode: Free Bet (SNR). Expected extraction: 70%–80% of bonus value.
- Free bet (SR — Stake Returned) — rare in Australia, behaves like cash. Calculator mode: Free Bet (SR). Expected extraction: 95%+ of bonus value.
Knowing which type you've been given is critical — using the wrong calculator mode is one of the most common beginner mistakes and can turn a guaranteed profit into a real loss.
Understand each offer
Before diving into each offer out there, its important to understand what exactly is required from you in order to qualify for the free bet or bonuses and to be able to withdraw your winnings.
Let's use this William Hill signup offer as an example.

Make sure to always read the terms and conditions of every offer you do before placing any bets to ensure you follow the correct criteria to qualify for your bonus bets or cash.
This offer requires us to deposit and bet through $100 and then receive $250 in bonus bets. Lets do the qualifying bet.
Selecting a bet
Lets say we have been going through some upcoming English soccer matches and we have come across this match below between Swansea and Arsenal on William Hill:

And the Betfair odds for the same match are as follows:

As our bet needs to be at odds of 1.50 or above, we will be trying to take odds as close to the minimum as required in order to keep our exchange liability low.
The odds between William Hill and Betfair look acceptable, so we decide on Arsenal for our bets, and we enter the numbers into our calculator below.

If we place the above qualifying bet, our liabilty will only be $55.63 at Betfair – this is the minimum amount we need to have in our Betfair account, with a qualifying loss of $5.63 which is acceptable. We try keep qualifying losses as low as possible, but accept anything between 5%-8%.
Remember we still have the $250 bonus bets to come.
Place the bet
We are happy with the qualifying loss of just over $5, and with a low liability of $55 and continue to place our bets below.

Our William Hill stake is $100. Enter and hit confirm bet.

Our Betair lay stake is $99.34. Enter and hit place bets.
Common qualifying bet mistakes
Avoid these traps when placing your first qualifying bets:
- Backing and laying at very different odds — increases your qualifying loss above the 8% threshold
- Using Free Bet (SNR) calculator mode for a qualifying bet — the lay stake will be wrong and you'll take a real loss
- Placing the qualifying bet below the minimum odds in the terms — the bonus won't trigger
- Cashing out the qualifying bet early — most bookmakers void the promotion if you cash out
- Forgetting to check Betfair has enough liquidity at the lay price before placing the back bet
- Not screenshotting the bonus terms — useful if you need to dispute a missing bonus credit
Frequently asked questions
What is a qualifying bet in matched betting? A qualifying bet is the first real-money bet you place to unlock a bookmaker's bonus or free bet. You back the selection at the bookmaker and lay the same selection at Betfair, locking in a small, predictable loss (the qualifying loss) regardless of the result. Once the bet settles, the bonus bet is credited and you extract the value from it.
Do I lose money on a qualifying bet? Yes — a small amount, typically 2%–8% of your stake. On a $100 qualifying bet, expect a qualifying loss of around $2–$8 depending on how close the back and lay odds are. This loss is more than recovered when you extract value from the bonus bet that follows (usually 70%–80% of the bonus amount).
What odds should I use for a qualifying bet? Use the lowest odds the offer allows. Most Australian bookmaker offers require minimum odds of 1.50 or higher for the qualifying bet to count. Lower odds mean a smaller exchange liability and a smaller qualifying loss. Aim for back odds between 1.50 and 2.50 with the closest possible Betfair lay odds.
Why do bookmakers require a qualifying bet? Bookmakers use the qualifying bet to filter out bonus abusers and to recoup some of the cost of the promotion. They want every signup to deposit, place at least one real cash bet, and become an active customer before the free bet is released. Matched betting works around this by laying the qualifying bet on Betfair to remove the risk.
How do I minimise my qualifying loss? Find markets where the back odds (at the bookmaker) and lay odds (at Betfair) are very close together. Use low-commission markets, place the bet during peak liquidity (close to event start for major sports), and always run the numbers through a matched betting calculator before staking. A qualifying loss above 8% usually means there's a better market available.
What's the difference between a qualifying bet and a free bet? A qualifying bet uses your own cash to unlock the promotion — stake is returned if you win. A free bet (or bonus bet) is credited by the bookmaker after the qualifier settles, and the stake is NOT returned with winnings (this is called Stake Not Returned, or SNR). Each requires a different calculator mode: Normal mode for qualifying bets, Free Bet (SNR) mode for bonus bets.
Can I lay the qualifying bet on a different exchange instead of Betfair? Yes, but Betfair is by far the largest betting exchange in Australia and offers the deepest liquidity, tightest spreads and lowest commissions on most markets. Smaller exchanges often have wider back/lay gaps that increase your qualifying loss. We recommend Betfair for almost all qualifying bets.
What happens if my qualifying bet doesn't trigger the bonus? Always re-read the offer terms before betting. Common reasons a bonus doesn't trigger: odds were below the minimum (e.g. under 1.50), the bet was placed on an excluded market, the offer required a specific deposit method, or the qualifying bet was cashed out early. If the bonus doesn't appear after settlement, contact the bookmaker — they'll usually credit it if you genuinely met the terms.
Conclusion
Finding low odds for qualifying bets is important, as it reduces the amount of money we need in Betfair and keeps our qualifying losses down to a minimum.
