Casino sign-up bonuses in Australia — the gap between the offer and the law

Current as of 18 October 2026. Verified against the ACMA register of formal warnings and blocking requests.

A punter searching for the best casino sign-up bonus in Australia is, before anything else, searching inside a legal gap. The Interactive Gambling Act 2001 prohibits the supply of online casino games and online pokies to anyone physically in Australia. No state or territory issues one. That is not a clause buried in the small print; it is the shape of the market, and it predates the modern web by half a decade. What follows is what that prohibition looks like in practice — what is blocked, who has been warned, how money moves (and how it cannot), and what an Australian reader can lawfully do instead.

How money actually reaches (and leaves) an offshore casino

The payment shelf matters here because it is where most of the cost to an Australian player lands, regardless of which brand is on the screen. A casino sign-up bonus is, in marketing language, “free”; in practice it is a deposit-gated package. The first question is whether the deposit can be made at all.

Card networks and the credit-card ban

Australia amended the Interactive Gambling Act in 2023 to ban credit cards and credit-related products from Australian-licensed online wagering, a restriction that took operational effect on 11 June 2024. Penalties for licensed operators that breach it run as high as A$247,500. The ban reaches the linked digital wallets that ride on a credit card — Apple Pay, Google Pay and Samsung Pay, which together account for around 45% of all card payments in Australia by number at the end of 2025. A licensed Australian wagering service cannot accept them; an offshore casino is outside the Australian regime, and there the networks do as their processing banks allow.

The Reserve Bank of Australia’s July 2025 review proposed removing surcharges on eftpos, Mastercard and Visa card transactions, and explicitly left American Express outside the proposed ban. Amex’s history is older than the network itself: founded in 1850 as a freight-forwarding company, it issued its first charge card on 1 October 1958, and unlike Visa or Mastercard it traditionally issues cards and processes its own transactions as a three-party scheme rather than a four-party network. For a player this means two things at once: the surcharge can be higher than on a Visa debit, and the dispute path runs through Amex rather than the cardholder’s bank.

Bank-level gambling blocks

The Australian banks have built a parallel defence. Westpac’s gambling block works at card level and refuses authorisation on any transaction registered under the merchant category code for “Betting/Casino Gambling” on eligible personal credit and debit cards. ANZ’s block, set up in the ANZ app, also covers gambling transactions made through a digital wallet such as Apple Pay on an eligible card — not only the physical card — and once it is on, switching it off again requires a 48-hour cooling-off period. Commonwealth Bank lets customers apply a gambling lock to eligible cards through the CommBank app, with the same caveat the other banks give: the lock catches most gambling transactions, not all of them, and a small number of non-gambling purchases may be blocked in error. Apple, for its part, charges no consumer fee for Apple Pay; transaction limits and PIN requirements are set by the card issuer or the merchant, not by Apple.

These blocks are blunt. They do not know the difference between a sports bet at a licensed bookmaker and a blackjack hand at an offshore casino. They decline on a category code. For a player who has turned one on, even an honest attempt to fund an account will often fail at the banking layer before any welcome bonus is ever credited.

PayID, Osko and the speed of a settlement

When a bank transfer works, it works quickly. With Osko, a transfer between participating Australian banks lands in under a minute, around the clock, addressed to either a BSB and account number or a PayID. Paying to a PayID shows the name of the account holder before the transfer is sent — a check Australian Payments Plus specifically warns about, since being asked to transfer to a PayID on an illegal gambling site almost certainly points to a scam. PayID-based instant transfers are available at over 100 Australian financial institutions, and more than 25 million PayID identifiers had been registered on Australia’s New Payments Platform by April 2025.

The platform itself, the New Payments Platform, opened to the public on 13 February 2018 and is owned by New Payments Platform Australia Ltd, a non-profit company whose 13 shareholders include the Reserve Bank of Australia and the major banks. Participants are required to keep monthly outages to no more than two minutes; in 2021 the ACCC authorised the merger of NPP Australia with BPAY and eftpos into the single operator Australian Payments Plus.

BPAY, the bill-payment rail

BPAY is a separate channel from instant bank transfer. The payer enters the Biller Code and the Customer Reference Number printed on a bill, and the payment goes out from within online banking. It has operated in Australia since 18 November 1997, sits inside the online banking of over 140 banks and financial institutions, and is offered by over 95,000 businesses. It is run by Australian Payments Plus, the same operator as PayID and Osko, and is owned equally — through Cardlink Services Limited — by ANZ, Commonwealth Bank, National Australia Bank and Westpac. For gambling, BPAY’s relevance is mostly to licensed Australian wagering, where it is one of the accepted deposit rails; offshore casinos do not run on it.

AUSTRAC and the A$10,000 reporting threshold

AUSTRAC’s threshold-transaction-report rule requires reports on transfers of A$10,000 or more. The rule applies only to physical cash. Ordinary electronic bank transfers are not subject to it, whatever the amount. For a player moving money through PayID or Osko to or from an offshore casino, there is no per-transaction report generated by the rail itself; the reportable activity sits elsewhere in AUSTRAC’s regime (suspicious-matter reports, for instance), not in the deposit. Knowing what is not reported is, for an Australian player, as useful as knowing what is.

What a sign-up bonus actually costs — and what a no-deposit bonus does not

The bonus shelf is where most of the marketing spend lands. The mechanics are worth separating from the language. A “sign-up bonus” is a promotional inducement tied to opening a new account; a “no-deposit bonus” is the same inducement paid out without the player having to fund the account first. Both carry conditions, and the conditions matter more than the headline figure.

How turnover works

A turnover, or wagering, requirement is the multiple of the bonus (and sometimes the deposit) that has to be wagered before any winnings become withdrawable. A A$100 bonus with a 40× turnover means A$4,000 has to be bet through the games before the bonus balance unlocks. The figure is mechanical: it does not care which game the player prefers, and slots contribute the wagering amount at 100% while most table games contribute far less, often 10% or zero, in the bonus terms. That is why a small bonus with a low multiple is often worth more to a punter than a large one with a steep one — the deposit size is not the variable that decides it.

Why the bet is capped

A standard bonus clause caps the maximum bet allowed while the bonus is active. The reason is the operator’s, not the player’s: without a cap, a single large wager could resolve the wagering requirement in one spin. The cap — typically A$5 to A$10 per spin or hand — protects the bonus value for the house. For a player, the same cap means the wagering requirement takes longer to clear at the table stakes the operator is willing to accept. The reader who notices the cap before claiming the bonus is the reader who does not later find their winnings voided for breaching it.

The unused bonus

If the wagering period expires before the turnover is met, the bonus balance and any winnings tied to it are usually forfeited. The terms vary. Some operators return the original deposit; others do not. Reading the bonus terms before claiming is the single most useful habit a player can form, and the one the marketing page is least likely to surface on its own.

Crypto and the sign-up bonus

A cryptocurrency deposit can, in principle, fund a sign-up bonus at an offshore casino that accepts it — Bitcoin, Ethereum, and the major stablecoins are commonly listed. In Australia, the same payment route is closed for licensed online wagering, where digital currency has been banned as a payment method since 11 June 2024. An offshore casino that takes a Bitcoin deposit for a welcome bonus is operating outside the Australian regime, with no recourse if a withdrawal is refused. The transaction itself moves on the relevant blockchain; the consumer protection does not exist on the same ledger.

The ranking the ACMA has actually published

The “best” of any Australian shortlist for casino sign-up bonuses is, on the evidence, a shortlist of brands the Australian Communications and Media Authority has formally warned for offering prohibited services. The comparison table below is the reverse of a recommendation: it is the ACMA’s enforcement record, drawn from the regulator’s own publications, with the operator name the warning was issued to and the date. No bonus terms are given, because the only sources for them were affiliate marketing pages, and printing them would amount to laundering marketing claims through a regulator’s name.

Two operators carry more than one warning: Dama N.V. appears with Woo Casino (March 2025) and Spirit Casino (May 2025), and with Level Up Casino and RocketPlay in the earlier May 2022 round. Techsolutions Group N.V. was warned in 2022 over Bizzo Casino, and Consolutetish S.R.L. was warned again in July 2025 over the same brand plus National Casino — a continuity that says more about the operator behind the brand than about the brand itself. Reading the column “Operator named by the ACMA” is the right way to read this list: brands come and go; the company that runs them is the entity the regulator actually warns.

The “Subject support” column reflects what third-party listings carry about each brand — and where they carry nothing, the cell is left blank rather than printed with an inferred value. A row marked “—” is not the operator’s own statement; it is the absence of a third-party listing, which is information of a different kind.

RocketPlay

The ACMA issued a formal warning to Pulsup Ltd over RocketPlay in March 2026. RocketPlay had already been the subject of an earlier warning to Dama N.V. in May 2022, alongside Bambet, Dazard, Level Up, Wild Tornado and Cobra Casinos. The brand runs as an offshore casino; any Australian-facing sign-up bonus it advertises is offered in defiance of the Interactive Gambling Act 2001. The same warning line — “online casino games cannot be licensed anywhere in Australia, whatever licence the site displays” — applies here as it does elsewhere on this list.

Level Up Casino

Level Up Casino was named in the May 2022 round of ACMA warnings to Dama N.V. The brand’s own marketing focuses on a multi-tier welcome package and a points-based loyalty programme; the third-party listings it appears on are limited. The operator change and the warning date matter more than the brand name: the company behind it has been on the ACMA’s published list for four years running.

Woo Casino

Dama N.V. was warned again in March 2025 over Woo Casino. No third-party listing carries material specific to this brand in the inputs the page was built on, so the verdict here rests entirely on the ACMA record. Woo Casino is one of two Dama N.V. brands added to the formal-warning list in 2025; the other is Spirit Casino.

Spirit Casino

Spirit Casino was added to the ACMA’s formal-warning list in May 2025, the second Dama N.V. brand added that year. No third-party listings carry subject-specific material for Spirit Casino in the inputs consulted, and the only verifiable line on the brand is the regulator’s own publication.

National Casino

National Casino sits under Consolutetish S.R.L., which was warned by the ACMA in July 2025. National Casino is the more visible of the two Consolutetish S.R.L. brands in the warning; Bizzo Casino is the other. The brand appears in third-party listings at the ACMA, AUSTRAC and BetStop — a presence that says less about the casino itself than about how broadly it is named across Australian regulatory and support services.

Bizzo Casino

Bizzo Casino carries two ACMA warnings: the 2022 warning to TechSolutions (CY) Group Limited and TechSolutions Group N.V., and the July 2025 warning to Consolutetish S.R.L. Two operators, one brand, on the published record. The pattern of operator turnover is the more telling reading: a brand that has moved between operators has, in regulatory terms, less stability than a brand that has stayed put.

Ignition Casino

The ACMA warned Bamboo Media over Ignition Casino in July 2025. No third-party listing carries material specific to this brand in the inputs the page was built on. The brand is one of the older names in the offshore casino market; the warning is the freshest published line on it for an Australian reader.

Instant Casino

EOD Code SRL was warned by the ACMA in February 2025 over Instant Casino. Third-party listings carry the brand at EcoPayz and PayID, which is a payment-rail presence rather than a casino review — worth noting because the rails named are the same rails an Australian reader would already be using for legal wagering.

Jackbit

Ryker B.V. was warned in April 2026 over Jackbit and CasinOK. No third-party listings carry material specific to Jackbit in the inputs the page was built on. Jackbit is one of two brands the ACMA named in the same April 2026 warning round, and the only verifiable line on the brand is the regulator’s own publication.

Casino Intense

Sterplay Holding Ltd was warned by the ACMA in April 2025 over Casino Intense. Third-party listings carry the brand at AUSTRAC, BetStop and Gambling Insider — the same Australian regulatory and support services that name National Casino, and a presence that places the brand in the same regulatory-adjacent position.

Sky Crown

Hollycorn N.V. was warned by the ACMA over Sky Crown and Blue Leo, the warning published in September 2022. No third-party listings carry material specific to Sky Crown in the inputs the page was built on. Sky Crown is the oldest ACMA warning still in this rotation, and the brand’s continued visibility on offshore casino affiliate pages has not changed its Australian regulatory status.

What the Interactive Gambling Act 2001 actually prohibits

The Australian position is one of the clearest in the English-speaking gambling world, and it is older than most of the brands on the table above. The Interactive Gambling Act 2001, strengthened by the Interactive Gambling Amendment Act 2017, makes it an offence to provide online casino games, online pokies or in-play betting to a person in Australia. No state or territory licences them. What is licensable is wagering on races and sport placed before the event, lotteries and keno — in practice licensed by the Northern Territory, through the Northern Territory Racing and Wagering Commission.

The NTRWC, and why it is not what it sounds like

The NTRWC regulates 52 of Australia’s online bookmakers — Sportsbet, Bet365 and Ladbrokes among them — which are licensed in the Territory for tax reasons. The commission has no full-time staff and meets once a month in Darwin. The bookmakers it licences are licensed to take sports and racing bets, not casino games; the licence they hold is not a casino licence and would not be one even if the brand ran a casino. Reading a licensed bookmaker’s footer for a “casino” tab does not change the legal category of the games behind it.

Enforcement record, in numbers

The ACMA’s blocking programme began with its first request in November 2019. By June 2026, a total of 1,751 illegal gambling and affiliate marketing websites had been blocked, and more than 230 unlicensed gambling services had left the Australian market since enforcement was strengthened in 2017. In the round reported on 26 June 2026, the ACMA asked Australian internet service providers to block 12 more illegal gambling websites: 7Signs, ChromaBet, Donbet, Duospin, Freshbet, Slots Gem, Jacks Club, Lucky Start, Pointsbetz, Spinrise, Vinyl Casino and Wildsino.

H2 Gambling Capital’s 2025 report estimates that Australians lose about A$3.9 billion a year to illegal gambling sites, and that the share of gambling going through legal channels fell from 74% in 2021 to 64%. The fall is the same story as the ACMA’s blocking list: the legal market is smaller, not larger, and the illegal one is where most of the spend lands.

How the law targets the provider, not the player

The IGA targets the operator. The individual player is not prosecuted. That distinction matters for two reasons. It does not legalise the offer; the prohibition on supply is the prohibition, and a player using an offshore casino cannot convert that into an Australian consumer-protection regime. An offshore site gives no complaints body and no recourse if a withdrawal is refused, and it can be blocked by an ISP with a balance still on it.

2026 reform: the Bill that passed

The Interactive Gambling Amendment (Gambling Reform) Bill 2026 passed Parliament on 19 August 2026. Its advertising and inducement measures commence on 1 January 2027. This is law with a start date, not yet in force on a 2026 page — and the marketing spend it will reach is precisely the spend that produced the casino sign-up bonus offers this page is about.

Tax: what a recreational punter owes

Gambling winnings of a recreational player are not assessable income (section 6-5 of the ITAA 1997), and losses are not deductible, unless the person carries on a business of gambling. The model is “check with the ATO” for anyone whose gambling looks more like a business than a hobby, but for the average punter, the only Australian tax line that touches a win is the line that says there is none.

Player protection — what is actually connected

A punter reading this page is, by definition, a punter the legal market does not reach with casino games. The protection tools that exist are real; their reach stops where the offshore site begins.

BetStop

BetStop, the National Self-Exclusion Register, has been live since August 2023. It binds Australian-licensed online and phone wagering services. An offshore casino is not connected to it. Registering with BetStop blocks a punter out of licensed wagering — a meaningful step for someone whose gambling runs through a licensed bookmaker — and does nothing for an account at any of the eleven brands named above.

The gambling blocks at the banks

The bank-level gambling blocks described in the first section — Westpac’s merchant-category-code block, ANZ’s app-based block (with the 48-hour off-switch), Commonwealth Bank’s CommBank-app lock — are blunt instruments that catch gambling transactions by category. They do not distinguish between legal and illegal gambling. For a punter who has turned them on, both a sports bet at a licensed bookmaker and a hand of blackjack at an offshore casino will be declined. The block is a category, not a check.

Gambling Help Online and the 24/7 helpline

The National Gambling Helpline (1800 858 858) is free, available 24/7, with chat at Gambling Help Online. The service is for anyone whose gambling has become a problem, regardless of whether the gambling is legal or not. Reading the helpline’s pages and registering with BetStop are the two actions a punter in difficulty can take today.

Crypto, and the offer that does not exist for Australians

The crypto shelf is the one where the prohibition is sharpest, because the 2023 amendments to the Interactive Gambling Act explicitly closed it: credit cards, credit-related products and digital currency are banned as payment for licensed online wagering, with the operational effect from 11 June 2024 and penalties up to A$247,500 for operators. For an Australian punter using a licensed bookmaker, the Bitcoin deposit button does not exist. For an Australian punter using an offshore casino, it does — and the consumer protection that goes with it does not.

The blockchain side is fast and quiet. A crypto deposit settles without the merchant-category-code check that a card runs through, which is one reason offshore casinos list it. The same speed works in reverse when a withdrawal is requested, with the same absence of an Australian complaints body on the other side. A punter who has claimed a “bitcoin casino sign-up bonus” has done so at a site outside the Australian regime; the welcome bonus is paid, the wagering applies, and there is no Australian recourse if the winnings are not paid out.

A “crypto casino no-deposit sign-up bonus” compounds the two gaps: it is a no-deposit offer (small, capped, and tied to heavy turnover) at a crypto-funded casino (outside the Australian regime). The risk profile of the offer is the risk profile of the deposit route — which is to say, it sits with the player.

What a punter can lawfully claim

The honest answer to the search behind this page is that no Australian licence exists for the thing being searched for, and the closest lawful substitutes are not casino games at all. A punter reading from Australia can lawfully access:

• Licensed online wagering with Australian-licensed bookmakers — Sportsbet, Bet365, Ladbrokes and others, licensed by the NTRWC. The offering is racing and sport (pre-event), not casino games. Welcome bonuses exist in this market, and they are subject to the credit-card ban, the BetStop register and the bank-level gambling blocks.
• Lotteries and keno under the various state and territory regimes — the lawful equivalent of a slots session at the lower end of the stake range.
• Land-based casinos and licensed pokies venues in each state and territory — the in-person equivalent of an online casino, with the consumer protection of an Australian operator.
• BetStop as a self-exclusion tool that binds Australian-licensed services, plus the National Gambling Helpline (1800 858 858) for anyone whose gambling has become a problem.

The welcome bonuses attached to these lawful options are smaller than the headline figures on offshore marketing pages, and the wagering requirements are typically lower as well — partly because the consumer protection regime is real, and partly because the regulator can require it. A punter who compares the two markets honestly ends up looking at a different kind of offer, not a worse one.

How fast the ACMA blocks sites — the arithmetic of enforcement

The estimate of how quickly the ACMA acts is based on the blocking history of the program, not on a single number.

The first ACMA blocking request was issued in November 2019. By June 2026, the ACMA’s blocking list totalled 1,751 illegal gambling and affiliate marketing websites. That is roughly 80 months of enforcement against an expanding market, and a simple division of the running total by the elapsed months gives an average blocking rate of about 21 to 22 sites per month across the life of the programme. The rate is not constant. The June 2026 round alone added 12 sites in a single request, and other reporting rounds named earlier in the research have added more in their own blocks; the underlying pace is lumpy, with bursts of activity tied to specific enforcement rounds.

The condition that sets the band is the definition of “blocked”: the 1,751 figure includes affiliate marketing sites alongside the gambling sites themselves, and the rate above treats them as one population. A reader who cares about the casino-specific rate is looking at a subset of the figure, and the rate for that subset will sit lower. The figure also accumulates, so the rate by 2026 is not the rate by 2020; the ACMA’s enforcement tempo has changed over the life of the programme. Reporting the rate as a band — roughly 20 to 25 sites per month over the life of the programme, with the casino-specific subset lower — is the honest shape of the answer.

What the arithmetic does not say, and what no arithmetic can, is whether the rate is fast enough. The illegal market is estimated at A$3.9 billion a year in losses. The blocking list removes the front door of each named site; the affiliate marketing list removes the routes that bring Australian traffic to it. Neither closes the back door, and the rate of new sites entering the market is not on the page.

How to read a sign-up bonus, if one ever shows up lawfully

For a punter who does end up looking at a lawful Australian-licensed wagering welcome offer — a sportsbook bonus, a multi-leg insurance product — the same reading skills apply, with one fewer legal question. The reading order is worth keeping.

First, the wagering requirement. A 5× multiple on a bonus is light for the market; a 40× multiple is heavy. The size of the bonus is not the variable that decides it.

Second, the game contribution. Slots typically contribute 100% of each bet to the wagering requirement; table games often contribute 10% or zero. The punter who wants to clear the bonus at the blackjack table is the punter who clears nothing.

Third, the maximum bet cap. The cap is the operator’s defence against the bonus being resolved in a single spin. A A$5 cap means a A$4,000 wagering requirement takes 800 spins at A$5 each — a calculable cost in time, before the house edge is even counted.

Fourth, the wagering window. A 7-day window is short; a 90-day window is generous. The same bonus carries a different cost in the two windows.

Fifth, the payment rails. A licensed Australian bookmaker takes debit cards, bank transfer, PayID/Osko and BPAY. A request for a credit card or a crypto deposit at a licensed operator is a request the operator is barred from accepting; at an offshore one, it is the first sign that the operator is outside the regime.

Sixth, the dispute path. A licensed Australian operator sits inside the Australian consumer-protection framework. An offshore one does not, regardless of the licence it displays on the footer.

What the ACMA’s 2025–2026 record looks like, in plain chronology

The ACMA’s formal-warning record for casino-style services, drawn from the regulator’s own publications, runs as follows. In May 2022, Dama N.V. was warned over six brands — Bambet, Dazard, Level Up, Rocketplay, Wild Tornado and Cobra Casinos. In September 2022, Hollycorn N.V. was warned over Sky Crown and Blue Leo. In February 2025, EOD Code SRL was warned over Instant Casino. In March 2025, Dama N.V. was warned over Woo Casino. In April 2025, Sterplay Holding Ltd was warned over Casino Intense. In May 2025, Dama N.V. was warned over Spirit Casino. In July 2025, Bamboo Media was warned over Ignition Casino and Consolutetish S.R.L. was warned over National Casino and Bizzo Casino — the latter a repeat warning after TechSolutions in 2022. In March 2026, Pulsup Ltd was warned over RocketPlay. In April 2026, Ryker B.V. was warned over Jackbit and CasinOK.

The pattern is the pattern the table above shows: a small set of operators runs a large set of brands, the ACMA names both, and the warnings accumulate over years. Reading the column “Operator named by the ACMA” is the right way to read the chronology.

What this means for the punter who got here from a search

The search that lands on this page is a search for something the Australian market does not lawfully offer. The honest answer is the one the page has given: no Australian jurisdiction issues a casino licence, no sign-up bonus attached to one is lawful for an Australian reader, and the brands that advertise one are on the ACMA’s published list for offering prohibited services.

The honest alternatives are the lawful ones — licensed online wagering with Australian bookmakers, lotteries and keno under state regimes, land-based casinos and licensed pokies venues, BetStop and the National Gambling Helpline for anyone whose gambling has become a problem. None of them carries a welcome bonus on the scale the offshore marketing pages advertise, and none of them needs to: the consumer protection is built into the licence.

A punter who has already deposited at one of the offshore brands has limited recourse. The ACMA’s enforcement is the long-term answer to the question, not the short-term one. The short-term answer is the bank-level gambling block — Westpac’s, ANZ’s or Commonwealth Bank’s — which will decline the next deposit before any sign-up bonus is paid out. That is the cheapest, fastest way out, and it is the one that does not depend on a regulator acting.

Frequently asked questions

What is the difference between a sign-up bonus and a no-deposit bonus?

A sign-up bonus is the welcome package a casino offers when a new account is opened, almost always tied to a first deposit; a no-deposit bonus is paid out without the player funding the account first, usually in a smaller amount and with a heavier turnover requirement. The two terms are sometimes used interchangeably in marketing, but the deposit is the line between them.

What does turnover, or wagering requirement, mean for a sign-up bonus?

It is the multiple of the bonus (and sometimes the deposit) that must be wagered through the games before winnings become withdrawable. A A$100 bonus with a 40× requirement means A$4,000 in bets; slots contribute the wagering amount at 100%, while table games usually contribute far less, often 10% or zero, under the bonus terms.

Is it legal for an online casino to offer a sign-up bonus to players in Australia?

No. The Interactive Gambling Act 2001 prohibits the supply of online casino games and online pokies to anyone in Australia; no state or territory licenses them, and the ACMA’s formal-warning and blocking programme is the regulator’s published record of enforcement against operators that offer them.

Can a sign-up bonus be claimed using a cryptocurrency deposit?

At an offshore casino, yes, and the transaction moves on the relevant blockchain without the merchant-category-code check that a card payment runs through. Under the Interactive Gambling Act 2001 as amended in 2023, however, digital currency is banned as a payment method for Australian-licensed online wagering, and no consumer-protection regime follows the crypto payment to an offshore site.

Why do sign-up bonus terms usually cap the maximum bet allowed?

The cap protects the bonus value for the operator by preventing a single large wager from resolving the wagering requirement in one spin. Typical caps sit between A$5 and A$10 per spin or hand, and breaching the cap during the bonus period is a common reason for winnings to be voided.

What happens to an unused sign-up bonus if the wagering period expires?

It is usually forfeited, along with any winnings tied to it; whether the original deposit is returned depends on the operator’s terms. The wagering window — typically 7 to 90 days — is set out in the bonus terms, and reading it before claiming is the single most useful habit a punter can form.