Arbitrage betting in New Zealand 2026: the spread, the statute, and the price of chasing it

Updated October 2026

Licensed

Available in US

Fast payouts

18+ Only

Current as of 30 October 2026 and checked against the Racing Industry Act 2020 (as amended in 2025), the Department of Internal Affairs public register, and the published terms of each operator named below.

The spread between two bookmakers’ prices on the same event is real, and so is the arithmetic that turns it into a small profit. What the marketing never says is how small that profit actually is, how much capital it ties up, and how few places remain in New Zealand where a punter can lawfully place both sides of one. Section 74AAA of the Racing Industry Act 2020, in force since 28 June 2025, names one group — TAB New Zealand, trading through TAB and Betcha — as the only operator that may offer racing and sports betting to people in New Zealand. A technique that needs several bookmakers cannot be run on lawful New Zealand providers alone, and the offshore brands that arrive in a New Zealand punter’s inbox are reaching out from outside the framework that protects the punter when something goes wrong.

That framing is what this page works from. Every figure, every licence line and every operator write-up below is read against one question: what does this cost the reader — in turnover, in excluded markets, in detection, in closure, and in the loss of a New Zealand complaints route.

Why this costs the punter more than the marketing admits

Arbitrage betting is the trade of betting on every outcome of an event at odds that, in aggregate, return more than the stake regardless of which outcome occurs. The condition for the trade to exist is mechanical: take every mutually exclusive outcome of one event, convert each price to an implied probability (the inverse of the decimal odds), add those probabilities together, and the sum has to be below one. If it is, the gap between the sum and one is, in a sense, free money — but only if the punter can stake the right amount on each side in proportion to those probabilities and only if every bookmaker involved honours the bet. The same arithmetic explains what the punter gives up to make the trade work. Each of those prices contains a margin, the slice of every dollar staked that the bookmaker keeps on average across the market. The margin of a market is one minus the sum of the implied probabilities of its outcomes — the same number, viewed from the other side of the ledger. A two-way market priced at 1.90 on each side sums to 1.0526 in implied probability, a payout share to the punter of 95.05% and a margin of about 4.95%; a market at 1.95 each side sums to 1.0256, paying out 97.50% and keeping 2.50%. Move from a sharply priced market to a softer one and the room for an arb widens — but the underlying margin is what the bookmaker is giving back, and the wider the room, the more each side has already conceded on price. The arbitrageur is collecting the leak, not defying the market. That distinction matters because it tells the punter what the trade actually is. An arbitrage opportunity earns a percentage of stake, not a percentage of profit — the same way a bank deposit earns interest on the principal, not on a return. A 2012 study by Franck, Verbeek and Nuesch, summarised on the public reference for the subject, found that 98% of opportunities then observable returned less than 1.2% on stake. To clear even a modest weekly target the punter is staking multiples of that target in working capital. The “arbitrage” framing is correct on the outcome and misleading on the effort it takes to realise.

The deeper cost is the relationship cost. Bookmakers see the pattern long before a punter turns a meaningful profit from it, and the trade the punter is making is at the bookmaker’s expense. Stakes get capped, prices get restricted, promotions are withdrawn, and accounts are closed. A punter running the strategy across several brands is thus running it on borrowed time, and the closing of an account is paid for by the welcome offer that bookmaker had previously given away. New Zealand’s offshore brands, where the terms are set in Curaçao or the Union of the Comoros and the complaints route back to New Zealand does not exist, do not even owe the punter the dignity of a stated reason.

What the work actually looks like in practice

The mechanics of placing an arbitrage bet are simple to write down and punishing to run. The punter finds an event whose prices across two or more bookmakers sum to an implied probability below one, calculates the proportional stake on each outcome so that every outcome returns the same total, places each bet before the price moves, and waits for the event to settle.

The catch is that any of those prices can move between the moment the opportunity is identified and the moment the second leg is placed. A bookmaker on a fast-moving market revises its price as money comes in on one side; the race is to place both legs at prices that still sum to below one, and a half-placed arb is a one-sided bet that has all the risk of a normal bet and none of the upside of an arb. The 1.2%-on-stake ceiling researchers found is the average return of completed arbs. Half-completed ones are pure loss on the leg that was placed. That asymmetry is the everyday cost of the strategy and is not visible in the success stories a search engine turns up.

Safer gambling, detection, and the long tail

Arbitrage betting trades volume for margin, and the volume is what surfaces the punter to the bookmaker’s trading desk. Several behaviours flag a punter in the kind of system every major operator runs: stakes that scale in proportion to a peer bookmaker’s price rather than to a published form guide; accounts that place a single bet then leave the rest of the market for that event untouched; a settled book that ends close to zero across many events; and promotional use that follows the welcome offer from brand to brand in a pattern no recreational punter has. The accounts that run undetected long enough to draw a steady wage are a small minority; the accounts that close with a balance still owed to the punter are a much larger one. Bookmaker terms typically reserve the right to void bets that they suspect of being part of an arb — sometimes only the disputed leg, sometimes both. The longer the strategy runs, the smaller the welcome offers get and the faster each account ages into restrictions. Most large bookmakers, the New Zealand offshore group included, share information about customers through commercial arrangements that the punter signs up to by accepting the terms. A punter cleaned out by one brand is not starting fresh at the next; they are starting in a category.

Harm minimisation and what the law actually obliges

Harm minimisation is the term used in New Zealand gambling policy for the set of tools an operator offers to help a punter keep control — deposit limits, time-outs, self-exclusion, reality checks, and access to specialist support. In New Zealand the gambling regulator is the Department of Internal Affairs (DIA) under the Gambling Act 2003, and it monitors compliance with the betting prohibition in the Racing Industry Act 2020. TAB NZ is the operator that owes those duties under New Zealand law. Its racing and sports app lists deposit limits, time-outs and self-exclusion in its settings, and points customers to the free Gambling Helpline on 0800 654 655 and the text line 8006, plus Safer Gambling Aotearoa. An exclusion taken out with TAB NZ covers both of its brands.

The offshore brands reviewed below owe no New Zealand harm-minimisation duties, and the Curaçao, Costa Rica or Comoros regimes their licences are issued under do not include the same self-exclusion register, the same levy-funded treatment, or the same complaints pathway back to New Zealand. DIA’s published position is that overseas operators may be in jurisdictions with minimal consumer safeguards, may not return unspent credits, and may not pay out large wins. A punter who self-excludes from TAB NZ has done most of what they can; a punter who keeps accounts with offshore brands at the same time has not.

Help is available independently of any operator account. The Gambling Helpline is free, confidential and available 24 hours. Punter’s aid services in each region and the Gambling Harm website of the Ministry of Health are set up to take a first call regardless of which brand a punter has been using.

Crypto, wallets, and the question of who knows who you are

Crypto-funded betting accounts settle in the currency the punter sends and the brand accepts — usually Bitcoin, Ethereum, or a stablecoin such as USDT — and the on-chain leg of the transfer is pseudonymous rather than anonymous. The wallet address is visible on the blockchain; the name behind it is not. What crypto does not change is what the receiving bookmaker does with the punter’s account: the brand still knows them by an email address, still asks for documentation once withdrawals get large, and still shares customer information with partner brands and with payment processors under its standard terms. A punter who funded an account with Bitcoin and then asked for a $20,000 withdrawal to a bank account is no harder for the brand to identify than a punter who funded with a Visa card — the bank side of the transfer carries the name. Crypto accounts are the easiest place for an arbitrage punter to find friction, for two reasons that cut in different directions. The first is that some offshore brands market themselves to crypto users and accept bets from people in markets they are not licensed in; the New Zealand offshore brands named below fit that pattern. The second is that the small extra layer of separation from a bank account is exactly what the bookmaker’s compliance team looks for when it screens for the kind of behaviour arbitrage generates, because the majority of legitimate crypto-funded recreational punters is much smaller than the marketing implies. A punter who opens a crypto-funded account to place one side of an arb against a fiat-funded account at a different brand has given both brands the same behavioural fingerprint through the shape of the bets, not the shape of the funding. What changes is what happens to a balance that cannot be withdrawn back to the original source. A bookmaker can refuse to return funds to a card that has been cancelled, a method that has been closed, or a wallet that has been delisted; an offshore brand that pays out only in crypto has narrowed the punter’s options by definition. The New Zealand brands reviewed below do not list a Bitcoin price feed on their sportsbooks; the lawful path for a New Zealand punter is in New Zealand dollars through the standard payment methods TAB NZ publishes.

Strategy, predictions, and the search for a free lunch

The arbitrageur’s is the only betting strategy that, in principle, removes the punter’s uncertainty about the outcome: every result has been covered. The qualifier is “in principle”, and the qualifier does most of the work. The strategy’s profit per dollar staked is the same number as the bookmaker’s margin on a soft market, and the strategy’s risk per dollar staked is the risk that the bookmaker cancels a leg, voids the bet, or restricts the account before the bet settles. Looking at the strategy as a “system” frames it as a method that returns a profit; looking at it as a job frames it as a method that returns a small wage for a long stretch of careful work, with a tail of bad weeks when prices move or accounts close. The statistical work that supports the strategy is real: a market with a margin of 2% will, on average, allow an arbitrageur to lock in close to 2% on stake if every leg is filled at the displayed price. The finding that 98% of opportunities return less than 1.2% on stake is consistent with the same arithmetic, because a market with a 2% margin offers an opportunity whose maximum profit is 2% on stake only when one bookmaker has priced its side at a loss-leader position; the average opportunity is much smaller. Predictions and tipster services, which promise a percentage of winning bets at the cost of a subscription, are a different product and do not arbitrage the market — they arbitrage the punter’s search for an edge, with the edge going to the seller of the subscription.

A punter reading the same research might come away with a different conclusion depending on what they were looking for. The punter who reads it looking for a steady small income will see a job that pays less than minimum wage per hour once the time-cost of pricing and execution is included. The punter who reads it looking for occasional small upside on bets they can place anyway will see a strategy worth knowing about and not worth running at scale. Both are reasonable readings of the same evidence.

The state of predictions and tipping in a NZ context

Prediction markets and tipster follow-services exist in the New Zealand market, mostly attached to the racing codes that have been the country’s betting tradition since well before online sportsbooks arrived. Betcha, the newer of the two TAB NZ brands, runs a Playbook with match analysis and a Bet Social section where punters chat, follow tipsters, and share bets or pools; its Toolbox lists odds boosts and insurance tools for bets that do not land. None of those features is arbitrage, and none of them removes the bookmaker’s margin from a bet that a punter places through them. They sit beside the strategy this page is about, not inside it.

Bet types, odds, and the markets that change the arithmetic

New Zealand bookmakers — TAB NZ in particular — display prices in decimal form, the format where a $10 stake at odds of 2.10 returns $21 if it wins. Fractional odds (“5/4”, “11/10”) and American odds (“+150”, “-200”) are used internationally and appear on the offshore brands reviewed below; the operator BillyBets, for instance, lets a punter switch between Decimal, American and Fractional on the bet slip. Convert anything else to decimal before doing the arithmetic this page describes, because the implied probability of a price is one over the decimal odds, and the conversion is exact for decimal and only approximate for the others. A 1.95 price implies 51.28% probability; a 1.90 implies 52.63%; a 1.50 implies 66.67%. The implied probabilities of all outcomes of a market, added together, give the market’s overround, and one minus the overround is the bookmaker’s margin. The 4.95% margin on a market priced 1.90 / 1.90 is the kind of margin a sharply priced two-way market carries. Tab and racing sports markets on a major sport tend to run tighter than that, on softer markets — a multi-leg same-game multi, a niche outright, a bookmaker’s priced-by-hand promo market — the margin widens. The wider the margin on each individual bookmaker’s market, the more room exists in principle for an arb to appear, because the leak is larger.

Multis, same-game multis, and the markets that move quickly

A single bet on one outcome is the simplest case the arithmetic covers. A multi — a parlay, an accumulator — multiplies the odds of its legs into one price and pays the resulting price on a stake that risks the loss of every leg at once. A same-game multi builds a multi out of markets that come from one match and changes the math: the legs of an SGM are correlated, the bookmaker’s margin compounds across them, and the price moves as the underlying match moves. A multi is the kind of bet an arbitrage punter is least likely to back, because the bookmaker’s margin across a multi is wider than across its constituent singles, and the correlation between legs makes the implied probability of the combined outcome lower than the product of the implied probabilities of each leg.

Fixed-odds racing bets in New Zealand are a separate tradition: Win, Place, Each Way, Quinella, Exacta, Trifecta, First Four, Double, Treble, Daily Double, Running Double, Quaddie, Big6, plus the Same Game Multi racing equivalent. None of those products arbitrage against a different brand’s price; they are placed with TAB NZ, settle against the TAB NZ dividend on pool bets and against the TAB NZ fixed price on fixed-odds bets. The arbitrageur’s edge, where one exists at all, sits in the difference between two bookmakers’ prices on the same fixed-odds outcome, not in the structure of any one product.

The ranking and the comparison

The set below is structured the way the New Zealand market itself is structured: TAB and Betcha first, as the only two lawful online operators for racing and sports, then the offshore brands a New Zealand punter is most likely to meet. The offshore brands are presented for reference because the reader sees them, and because the comparison the reader is making — between the lawful path and the alternatives the marketing reaches — needs them on the page. None of them is licensed to take sports or racing bets from a person in New Zealand, none of them gives the punter access to the New Zealand harm-minimisation framework, and none of them is recommended. The table that follows names each brand’s status under New Zealand law and what the brand’s own terms state about the subject this page is about. Where a column has nothing to say for a particular row, the table says so, in the form a reader can read. The ordering inside each group reflects the same criteria: depth of markets, terms on bet type, payment ground, and the operator’s stated position on a bonus or promotion that has the shape of an arb (boosted odds, insurance on a losing leg, a refund in bonus bets rather than cash). Same row, same criteria: every brand has been read on the same.

Landscape of brands reviewed

TAB (TAB NZ brand) — the lawful path

TAB is the established retail and online brand of TAB New Zealand, the only operator that may lawfully offer racing and sports betting to people in New Zealand since section 74AAA of the Racing Industry Act 2020 took effect on 28 June 2025. The TAB business is run by Entain under a 25-year agreement signed in 2023, with the gross profits split 50/50 and at least $150m a year flowing back to TAB NZ for the first five years; Entain also paid a one-off $100m to the racing sector at the signing. The arrangement makes TAB the lawful path for anyone placing a bet in New Zealand, and the only path through which the Gambling Helpline, the self-exclusion register, the Problem Gambling Levy (0.74% of betting revenue, in force from 1 July 2025 to 30 June 2028) and the DIA’s monitoring regime apply. The app itself is the racing and sports betting app for the New Zealand market under the seller name New Zealand Racing Board, released in September 2014 and updated regularly since.

For the punter running an arbitrage strategy, TAB is also a closed door. TAB’s prices are set against the tote dividend and against the major offshore books, but they are still one bookmaker’s prices — they do not give the punter a second side to back a different brand at. Punters running arbs in New Zealand in 2026 are, by definition, backing one side at TAB or Betcha and the other side at an offshore brand that does not have a New Zealand licence.

Betcha (TAB NZ brand) — the second lawful door

Betcha is the online sister brand of TAB NZ and shares its TAB licence and oversight. Both brands are covered by a single self-exclusion, both are subject to the same safer-gambling regime, and both are run as part of the same TAB NZ platform. Calling Betcha a rival to TAB misses what the two brands are: two products sitting on the same licence. The product surface is what Betcha adds — a daily Toolbox of odds boosts and insurance tools for losing legs, a Playbook with match analysis and tips, and the Bet Social section where punters follow tipsters and share bets or pools.

In the comparison that this page is built to support, Betcha suits the punter who wants a sportsbook-shaped interface and the social tools that go with it, with the same lawful-New-Zealand status as the parent TAB offering. Neither TAB nor Betcha will accept the other side of an arbitrage wager against another brand — the licensing position rules that out for any brand inside the New Zealand framework.

Glorion — not licensed in New Zealand

Glorion is a brand marketed to an international audience and not licensed to take bets from people in New Zealand. Section 74AAA places liability on the offshore operator; the brand names no New Zealand-applicable licence and no New Zealand complaints route reaches it. Support is offered by live chat and email and the site is 18+, both useful signals and neither equivalent to being inside the New Zealand regulatory framework. In the comparison below, Glorion stands for the international sportsbook-and-casino brand a New Zealand punter meets through affiliate marketing; its size of market and depth of sports are what the marketing emphasises, and the absence of a New Zealand licence is what the marketing does not.

BillyBets — not licensed in New Zealand

BillyBets offers the punter a choice of odds format — Decimal at 2.00, American at +100, Fractional at 1/1 — and a feature set aimed at a sportsbook-and-casino reader: cashback and reload bonuses on sport, a coin shop where coins earned through deposits, betting, tournaments and challenges convert to free bets and free spins, and a five-tier VIP programme. The brand names no licence that applies in New Zealand; under section 74AAA none of the marketing machinery is on offer to a New Zealand resident in a way the operator can lawfully serve.

In the comparison, BillyBets is the player-loyalty-shaped bookmaker: the coin shop and the reload cadence are pitched at a punter who treats the account as a hobby; the absence of a New Zealand licence means the loyalty value the marketing sells sits outside any New Zealand protection.

Roobet — not licensed in New Zealand

Roobet is the brand name of Raw Entertainment B.V., registered in Curaçao under number 157205 and licensed by Curaçao under OGL/2024/687/0427, a gaming licence that does not extend the right to take bets from people in New Zealand. The brand is well known internationally for a crypto-funded product: deposits and withdrawals in Bitcoin, Ethereum, USDT and other coins, on-chain settlement that is pseudonymous rather than anonymous, and a sportsbook positioned beside a casino that takes the same coins. A Curaçao licence is a legitimate authorisation; it is not a New Zealand licence, and the difference matters because the complaints framework a New Zealand punter can reach does not run through Curaçao.

In the comparison, Roobet is the crypto-funded international bookmaker. For a New Zealand punter, the product’s interest and the lawful-to-use-from-New-Zealand position are two different questions, and only the second one matters.

22Bet — not licensed in New Zealand

22Bet operates under a Curaçao licence, 8048/JAZ, held by TechSolutions Group N.V. The product range covers singles, accumulators, systems and chains, plus live betting with score updates. The brand is one of the longer-established offshore sportsbooks and is well-known in international affiliate marketing. The licence it names gives it no right to take a bet from a person in New Zealand; the rest of the offer is unaffected.

In the comparison, 22Bet is the established offshore sportsbook: market depth is the strength the marketing leads with; the New Zealand position is the silent part.

Rabona — not licensed in New Zealand

Rabona launched on 23 December 2019 as the sixth online sportsbook of the Soft2Bet, operating under a Curaçao licence. The product lines up with the Soft2Bet group template: a sportsbook with the usual prematch and live shape, a casino product bolted on, a promotions page aimed at the affiliate-acquired punter. The licence is a Curaçao licence; the right to serve a person in New Zealand is something the licence does not give.

In the comparison, Rabona is the group-templated offshore bookmaker. The convenient feature set, the Curaçao licence, the New Zealand status: same answer as the rest of the offshore group, and the comparison reads them against the lawful path.

Golden Panda — not licensed in New Zealand

Golden Panda publishes dedicated Sports Terms and Conditions that cover fixed-odds betting — including Combo Bets, a Bet Builder feature, live scoreboards, broadcasts and stake and odds limits. The brand names no licence that applies in New Zealand; the published terms are the most complete set in the offshore group reviewed here, which is a useful feature for the punter who reads terms before staking, and an irrelevant one for the punter who is reading terms because they have a dispute to take somewhere.

In the comparison, Golden Panda is the terms-publishing offshore bookmaker. Read the Sports Terms page; do not stake from a New Zealand address expecting New Zealand protection.

BetNinja — not licensed in New Zealand

BetNinja is licensed to conduct online gaming operations by the Union of the Comoros, a small-island jurisdiction whose authorisation is not a New Zealand licence and does not extend to taking bets from people in New Zealand. The brand markets itself into the affiliate channel that serves several regulated markets; the question for a New Zealand punter is the same one the marketing does not answer.

In the comparison, BetNinja is the Comoros-licensed offshore bookmaker. The product has the shape of the international group; the lawful path is elsewhere.

FunBet — not licensed in New Zealand

FunBet offers a sportsbook across football, ice hockey, American football, basketball, volleyball, tennis, rugby and baseball, with a 24/7 live betting claim and the usual casino product beside. The brand names no licence that applies in New Zealand and the live-betting claim is the only operational detail the marketing leads with. The New Zealand position is the same as the rest of the offshore group; the comparison reads it against the lawful path the same way.

Overview of what arbitrage betting actually is

Arbitrage betting exists because two or more bookmakers disagree on the price of the same outcome, and the punter who can place bets with both of them at the prices both are offering has locked in an arbitrage opportunity regardless of which outcome occurs. The mechanics are simple: take the implied probability of each price (one divided by the decimal odds), add the implied probabilities of all mutually exclusive outcomes of the event, and the sum is below one. If the sum is below one, the difference between the sum and one is the size of the arb on every dollar the punter stakes in proportion to those implied probabilities. The same calculation, viewed from the bookmaker’s side, is the market’s margin. The simplification that does the damage is the word “small”. The 2012 academic finding that 98% of observable arbs returned less than 1.2% on stake means the average arb is a transaction that returns a few cents for every dollar at risk, and the punter who wants to clear a meaningful weekly wage from the strategy stakes multiples of that wage in working capital, against bookmakers who detect and limit the strategy faster than the punter can collect the welcome offers that fund it. A New Zealand punter cannot even start at that volume on lawful New Zealand providers alone, because there is only one lawful group, and the spread that funds the trade cannot exist within a single operator’s prices.

What the strategy looks like as a transaction

A worked example, in words rather than a worksheet: take a two-way market priced at 2.10 and 2.10 by two different bookmakers — implied probability 47.62% each side, summing to 95.24% with a margin of 4.76%. Substitute a softer market where one bookmaker has priced a side by hand: take the same two-way market at 2.20 and 2.00, implied probabilities 45.45% and 50.00%, summing to 95.45% — still a margin of 4.55%, not yet an arb. A genuine arb is the rarer shape: 2.20 and 2.05, implied probabilities 45.45% and 48.78%, summing to 94.23%, with the punter’s edge of 5.77% on stake awaiting a stake on each side proportional to those probabilities. The proportional stake on the 2.20 side is 51.7% of the working capital; the proportional stake on the 2.05 side is 48.3%; both bets win one outcome of the event.

The mechanics of placing the trade carry most of the cost. The first stake is straightforward; the second is the harder one, because the first stake has changed the market the second bookmaker is pricing, and the price the punter is trying to back at may have moved between the moment it was screenshotted and the moment the bet was placed. A half-placed arb is a one-sided bet at a price the bookmaker has already shifted. The 1.2%-on-stake ceiling is the average return of completed arbs; half-completed ones are losses, the partial stakes the punter has made at the old prices. The average return and the worst week are very different numbers, and the strategy punishes the punter who plans on the average.

What the punter can realistically clear

Working through the arithmetic in plain terms: an arb with a 1% edge on stake is a week of pricing screens and placing bets to clear a return that looks like a part-time wage once the time-cost of pricing is priced in. The academic study finding 98% of opportunities at less than 1.2% on stake is the empirical shape of that ceiling — most opportunities are smaller than 1.2%, none is much larger, and the strategy is a wage for the punter who treats it as one. The “sure bet” framing reads the same evidence as a free lunch; the punter who treats it as a job reads the same evidence as a job that pays well below minimum wage and that ends when the books have had enough.

Legality, regulation, and what New Zealand law actually says

Section 74AAA of the Racing Industry Act 2020, inserted by the Racing Industry Amendment Act 2025, took effect on 28 June 2025. The section reads “no person other than TAB NZ may offer racing betting, sports betting or other racing or sports betting to a person in New Zealand”, and that prohibition applies regardless of where the offeror is resident or incorporated. The Department of Internal Affairs told unlicensed providers to withdraw with immediate effect. The lawful status of TAB NZ does not flow from a licence register — there is no register, because there is no licence to apply for; it flows from the prohibition applying to everyone else. TAB and Betcha are the two trading brands of that single operator; calling them rivals misses the structure of the law.

The penalty for breaching section 74AAA by offering bets to a person in New Zealand is not stated in the section. No prosecution of an offshore operator was found in the publicly available record; the DIA’s stance is published guidance, not court action to date. The law targets the operator, and the published penalty for an individual placing a bet with an offshore operator is also not established — section 19(4) of the Gambling Act 2003, inserted in 2025, says an individual may not be convicted for placing such a bet. Safe wording is the wording the statute supports: the offshore brand is on the wrong side of the law; the punter is on uncertain ground that DIA has, in public guidance, asked them to leave.

What may be bet on, and what may not

The lawful offering is racing and sports betting from TAB NZ. TAB takes fixed-odds and tote bets; fixed-odds racing bets include the long list of New Zealand racing products — Win, Place, Each Way, Quinella, Exacta, Trifecta, First Four, Double, Treble, Daily Double, Running Double, Quaddie, Big6 — and Same Game Multis. Live betting is listed in the TAB NZ apps. There is no lawful New Zealand betting exchange and spread betting is outside TAB NZ’s sports-betting definition; this page writes nothing about a New Zealand exchange.

Greyhound racing is closing in stages from 1 August 2026, and from that date offshore operators may not take bets on greyhound races either. The Online Casino Gambling Act 2026 licenses online casino gambling only and does not extend the betting monopoly — TAB NZ winning the right to apply for a casino licence does not mean casino gambling falls inside the betting framework, and the law reads them as separate. Whether esports betting is “sports betting” under the Racing Industry Act is not established; nothing the page writes relies on an esports ruling.

Player protection and the rules that apply

The age for TAB NZ betting is 18, set under section 89 of the Racing Industry Act 2020; betting under 18 is an offence. Land-based casinos are 20 — never the two ages are not the same. TAB NZ accounts need a verified New Zealand address and ID. TAB NZ lists deposit limits, time-outs and self-exclusion in its apps, and a self-exclusion covers both TAB and Betcha. There is no single national online-betting exclusion register; the register the casino law will require is for online casinos only and does not extend to betting. TAB NZ pays a Problem Gambling Levy of 0.74%, in force from 1 July 2025 to 30 June 2028; offshore operators supplying New Zealand residents pay the online gambling duty on profits (12% since 1 July 2024, 16% from 1 January 2027), but a duty being payable is not the same as a betting licence — the offshore operators’ duty is a casino duty, not a betting authorisation, and tax payment does not make an offer lawful.

Help is available independently of any account. The Gambling Helpline (0800 654 655, text 8006) is free and 24/7. Safer Gambling Aotearoa publishes regional support contacts and a self-assessment guide. Punter support is funded through the levy and through Vote Health, and it does not depend on any operator being a registered punter’s first port of call.

Advertising, promotions, and what the ASA says

The Advertising Standards Authority’s Gambling Advertising Code applies to betting advertisements in New Zealand. The Code requires that advertising does not target children (under 14) or young people (14 to under 18), judged by context, appeal and expected audience — 25% or more of the audience counts as significant where accurate data exists. Advertising must not encourage harm and must be truthful, with terms available. There is no New Zealand equivalent of a “whistle-to-whistle” broadcast ban for betting advertising, and the page does not write one in.

TAB NZ runs “bonus bets” promotions; no New Zealand rule fixes the size or the wagering terms of a betting promotion, and TAB NZ’s own terms are the only published terms. No promotion code or specific working promotion is named on this page, because the description of what a promotion is worth is what the page is for, and a code or a current offer is outside the moment of writing. Bonus bets on TAB and Betcha sit inside the lawful New Zealand framework, and the offshore brands reviewed below run their own bonus machinery under their own jurisdictions — neither is the arb-edge the trade needs, and both cost the punter turnover that is worth checking in the relevant terms before claiming.

Tax: what Inland Revenue says and what it does not

Inland Revenue’s published guidance is that recreational gambling winnings are generally not taxable, and that prize money from TAB horse, dog and trotting races is not taxable. A person whose betting is a business is a different case; the page writes the general rule and recommends a reader whose position is not the general case consults Inland Revenue or an accountant. Operator-side taxes are the Problem Gambling Levy on TAB NZ (0.74% of betting revenue) and the online gambling duty on offshore operators supplying New Zealand residents (12% of profits since 1 July 2024, 16% from 1 January 2027). The point-of-consumption charge on offshore racing and sports bets ceased on 30 June 2026. None of this changes the licence-position: the offshore brand paying tax is not, by virtue of paying tax, licensed to take a bet from a person in New Zealand.

Calculation: how the margin lives inside the odds

The arithmetic this page is built around is the conversion between two views of the same market. Given two decimal prices on the mutually exclusive outcomes of one event, the implied probability of each outcome is one divided by the decimal price. Add the implied probabilities together. The sum is the payout share (the share of every dollar staked the bookmakers collectively return on the market); one minus the sum is the margin (the share of every dollar staked the bookmaker keeps on the market).

Take the example the page has used — a two-way market at 1.90 / 1.90. Implied probability on each side is 1 ÷ 1.90, which is 0.5263 or 52.63%. Sum of the two implied probabilities is 1.0526 or 105.26%. The payout share is 1 ÷ 1.0526, which is 0.9505 or 95.05%. The margin is 1 − 0.9505, which is 0.0495 or about 4.95%. The same market at 2.10 / 2.10 produces an implied probability of 0.4762 each side, summing to 0.9524, paying out 1 ÷ 0.9524 = 1.0500 in share-of-stake — wait, the right comparison is: a 2.10 / 2.10 market has implied probabilities summing to 95.24%, paying out 100% of stake to all winners combined, leaving a margin of 4.76%. The 1.90 / 1.90 shape is a sharper (tighter) margin than the 2.10 / 2.10 shape, which is exactly the pattern the comparison the rest of this page describes.

The result, stated as a band: a two-way market at 1.90 / 1.90 has a margin that sits in the 4.5% to 5.0% band, with 4.95% as the central estimate; a two-way market at 2.00 / 2.00 has a margin that sits at 0% — the implied probabilities sum to 100%, the market is a “fair” market with no margin and the same arb on both sides if both bets win. A genuine arb is a market where one bookmaker has mispriced a side — a 2.20 / 2.00 market has implied probabilities of 0.4545 and 0.5000 summing to 0.9545, paying out 100% of stake and leaving a margin of about 4.55%; the arb edge from the punter’s side is the gap between the bookmaker whose 2.20 is the loss-leader and the bookmaker whose 2.00 is the comparable price.

The condition to read the band against: the margin is a property of the market, not of the price. A 1.90 price on a two-way market is not “the margin” — it is one of two prices, and the margin is a number the two prices together produce. The same 1.90 price on a three-way market sits in a market where the three implied probabilities need to be added, and the margin is the result of the addition, not of any single price. Used in isolation, the formula misleads; used against the matching prices on the other outcomes, it gives a single number that says what each dollar of stake costs the punter in bookmaker take on that market.

Closing the loop on what the page is for

A New Zealand punter reading this page in 2026 is advised to carry three key points and not a recommendation. The first point is that only TAB NZ, through the TAB and Betcha brands, may lawfully offer racing and sports betting to people in New Zealand, and that every offshore brand on the comparison table sits on the wrong side of section 74AAA. The second point is that arbitrage betting returns a percentage of stake that the bookmakers’ margin suggests is small, and the academic work that has measured the size of that return puts most opportunities under 1.2% on stake — the work to clear a meaningful return is the work to stake multiples of that return, against bookmakers who detect the pattern faster than the punter can collect the welcome offers. The third point is that a calculation the page has worked through — the margin of a two-way market — gives a single number that says what each dollar staked costs the punter; the same arithmetic describes an arb opportunity when the implied probabilities of two outcomes sum below one. The verdict the page offers is honest framing rather than a recommendation. Inside the lawful New Zealand framework the punter gets the harm-minimisation tools, the levy-funded support, the regulator oversight and the complaints pathway; outside it, the punter gets a product the offshore operator is not authorised to sell them, on terms the New Zealand regulator does not enforce, with no path back into New Zealand when the operator stops paying out. The arbitrage opportunity exists; the strategy is the punter’s to run or not to run; the lawful path is the one the New Zealand statute wrote.

Frequently asked questions about arbitrage betting in New Zealand

Does sports arbitrage betting work?

It works in the strict sense that the arithmetic returns a small profit regardless of the outcome — when both legs of the trade fill at the displayed price before the price moves. The realistic ceiling is small: a 2012 academic study found 98% of opportunities returning less than 1.2% on stake. The real cost is the time-cost of pricing and the relationship cost of being detected by the bookmakers involved.

How does a punter actually place an arbitrage bet?

Find an event whose prices across two or more bookmakers convert to implied probabilities that sum below one; calculate the proportional stake on each outcome from those implied probabilities so each outcome returns the same total if it wins; place each leg before the market moves; settle the bets as the event resolves. The difficulty is the second leg, which has to be placed before the price the screen showed has moved.

What does this look like in New Zealand specifically?

In New Zealand, TAB NZ and its brands constitute the only authorised operator for these activities since section 74AAA of the Racing Industry Act 2020 took effect on 28 June 2025. A trade that needs two or more bookmakers at different prices cannot be run inside that group alone, and offshore brands are reaching out from outside the New Zealand framework.

Which bookmaker may lawfully take sports and racing bets in New Zealand?

TAB NZ, operating through TAB and Betcha, is the sole provider authorised to offer these services under the 2025 amendment to the Racing Industry Act 2020. There is no licence register for bookmakers because there is no licence to apply for, and the prohibition applies regardless of where the offeror is resident or incorporated.

How is the return on a single bet worked out from the stake and the odds?

In decimal odds, the return on a winning bet is stake multiplied by the odds. A $10 stake at odds of 2.10 returns $21 if it wins, of which $10 is the stake returned and $11 is the net profit. A combination bet multiplies the odds of its legs into one price and pays that price on the stake as a single transaction.

What is the bookmaker’s margin and how is it visible in the odds?

The margin is the share of every dollar staked that the bookmaker keeps on a market. It is calculated as one minus the sum of the implied probabilities (one over the decimal odds) of every mutually exclusive outcome of the market. A market at 1.90 / 1.90 sums to 1.0526 in implied probability, paying out about 95.05% on stake and keeping about 4.95%; the same shape at 2.10 / 2.10 sums to 0.9524 in implied probability, paying out about 95.24% on stake and keeping about 4.76%.

Written by the editors at Kiwifreebets.