Is Polymarket legal in Australia?

Is Polymarket banned in Australia?

Yes — at the network level, since 13 August 2025. ACMA announced that day that it had asked Australian internet service providers to block a new batch of what it called illegal online gambling sites, after investigations found them operating in breach of the Interactive Gambling Act 2001. Four sites were named in that batch: Slot Mafia, Top Aussie Pokies, Polymarket and Spinanga.

Two details in that sentence get mangled by most coverage. First, the blocking power is not the Interactive Gambling Act. The IGA is the law ACMA found Polymarket in breach of; the authority to ask ISPs to block a website comes from section 313 of the Telecommunications Act 1997, and ACMA's own page on blocked gambling websites says so directly. Second, the block did not arrive out of nowhere. ACMA had issued a formal warning to Adventure One QSS, Inc., the company operating Polymarket. The warning is dated 2 July 2025 — roughly six weeks before the blocking request, and the sequence is on the public record.

The blocking programme itself is industrial, not occasional. By ACMA's own published counts, 1,296 illegal gambling and affiliate websites had been blocked as of August 2025; by mid-July 2026 the figure was 1,774. That is a standing monthly process, and it is the machinery Polymarket ended up inside.

Is it illegal to use Polymarket in Australia?

The Interactive Gambling Act is written at companies, not customers. Its operative part is literally titled "Designated interactive gambling services not to be provided to customers in Australia". Its prohibitions — section 15 for prohibited services, section 15AA for unlicensed regulated services — are duties on the provider. There is no counterpart section addressed to the person placing a bet. ACMA describes the Act, in its own plain-English explainer, as the rules for companies that offer or advertise gambling services to Australians.

ACMA's consumer warning is consistent with that structure. When it announces new blocks, the risk it warns Australians about is losing their money on services without customer protections — not prosecution. We looked for a regulator sentence that says using these services is an offence, and equally for one that says it is not; neither exists on the pages we read. What can be said precisely is this: every prohibition in the Act binds the provider, and the Act creates no offence for a customer.

Two honest caveats. Gambling in Australia is also regulated at the state and territory level, and those laws are separate from the Commonwealth Act — we have not audited them, and this page is not legal advice. And none of this changes the practical situation described in the next section: whatever the law says about users, both the Australian block and Polymarket's own restriction are aimed squarely at the service.

One scope note while we are on licences, since this page quotes ASIC on the subject: OVERDOG is not an Australian-licensed operator either. We are an access layer routing orders to Polymarket's books, and we would rather say that plainly here than let a reader infer otherwise.

Does Polymarket work in Australia right now?

No — and this is the part the ranking pages get wrong. The refusal runs in both directions, and the stricter half of it is Polymarket's own.

Polymarket publishes its geoblock policy in its developer documentation, in three tiers. Australia sits in the middle tier: close-only on the frontend and the API. An Australian who already holds positions can close them; nobody in Australia can open a new one, and because the restriction covers the API as well as the website, it is not a cosmetic front-end gate that a different client can route around. For a new user who holds no positions, close-only is functionally a total refusal.

The Australian half we measured ourselves, on 18 August 2026. Telstra's resolver at 139.130.4.4 answers a DNS query for polymarket.com with ACMA's block record — block.acma.gov.au — while returning genuine records for overdog.bet. The block is DNS-shaped, which is exactly why naive HTTP probes sail through it: a probe that brings its own resolver never sees the ACMA record. Our evidence for the block is the direct resolver query, not an HTTP status. Two honesty notes apply. Coverage is per-ISP, not per-country: we probed Telstra, TPG, Superloop and Neptune, not Optus or Aussie Broadband. And a 200 response is not the same thing as a usable product.

Is Polymarket gambling?

Australia has answered this question twice, from two regulators, in two vocabularies — and the duality is the real answer.

ACMA's answer is the blocking action itself: it blocked Polymarket as an illegal online gambling site operating in breach of the Interactive Gambling Act, and for an unlicensed event-betting service the relevant limb of its published criteria is providing an unlicensed regulated interactive gambling service to Australian customers.

ASIC's answer came a year later, in different words. Its Moneysmart investor-warning page on prediction markets — updated 3 August 2026 — states that no prediction market is currently licensed as a financial market in Australia. It compares the all-or-nothing contract structure to binary options, and cites ASIC's own review finding that around 75% of retail clients lost money trading those. It also lists the risk of betting against traders with inside information, and the absence of Australian financial-services protections on unlicensed platforms. ASIC Commissioner Alan Kirkland put it more plainly to ABC News the same week: whatever the legal definition, in substance a prediction market is, in his words, "akin to gambling". Note what neither regulator says: that the user is committing an offence. Both warnings are about protections and losses, not prosecution.

How to trade Polymarket markets from Australia

OVERDOG is an access layer for Polymarket's order books: orders route through our trade gateway to the same CLOB, at the prices traders set. The site loaded on every Australian network we probed. An account is a Telegram or Google sign-in, and funding is crypto in, crypto out. That is the whole route — no VPN into polymarket.com, no card, no bank transfer.

Do you pay tax on prediction-market winnings in Australia?

The governing guidance is old, clear about its default, and pointed about its exception. Taxation Ruling IT 2655 — the ATO's ruling on whether a taxpayer is carrying on a business of betting or gambling — records that no Australian case has held a mere punter's winnings assessable, or their losses deductible. For a recreational bettor, that is the default position.

The exception is the part a prediction-market trader should actually read. The ruling sets out four Brajkovich criteria for when gambling becomes a business. It also adds a sentence aimed straight at this audience: gambling with a significant element of skill is more likely to have tax consequences than gambling on merely random events. A prediction market is a skill-weighted, screen-based, systematically traded activity — precisely the fact pattern the ruling flags. Read plainly: the better and more systematically you trade, the closer you move to the line. That is our reading of the ruling, not advice; there are no rates or thresholds in it, and we make no claims here about the crypto conversion leg. Talk to a registered tax agent.

Trading Polymarket markets with OVERDOG

OVERDOG is not a bookmaker. Prices come from Polymarket's order books, where traders back both sides against each other, so there is no bookmaker margin built into the odds — the price is a mechanic, not a promise about outcomes. The cost is stated once and compound, always: a flat 1% OVERDOG fee plus Polymarket's own fees. The ticket names that pair and shows the total before you confirm.

Settlement is on-chain and a winning share redeems for $1 — the custody trail is public and checkable on the proof page. Your wallet keys are exportable, which means we cannot freeze you out of your own funds. An account exists — Telegram or Google sign-in — and depositing crypto requires no document upload, but that is not the same claim as "fully anonymous", and we will not make that claim. There are no bonuses here, ever: no welcome offers, no deposit matches, no promo codes.

What you get, in one line: the same markets, reachable, at the price the book sets, with an exit you control.