Sports betting calculators in New Zealand: stake, odds, margin, and what changes under TAB NZ's monopoly

Updated October 2026

Licensed

Available in US

Fast payouts

18+ Only

Snapshot current as of October 30, 2026, verified against TAB NZ’s published betting rules and the Racing Industry Act 2020 as amended in 2025.

A “sports betting calculator” is not a single thing. The phrase covers at least four jobs a bettor has to do before clicking confirm: work out what a winning bet pays back, see the margin the bookmaker has built into the odds, value a free bet the operator has handed over, and check whether a bonus is worth the turnover the terms ask for. None of these require software. Each is short arithmetic that fits in one line on the back of the betting slip, and the point of writing them down is that the answer the marketing copy implies and the answer the math returns are usually not the same.

In New Zealand the maths is the same as anywhere else, but the market the math runs on is not. Since 28 June 2025 TAB NZ — through the bookmaker as a retail and app brand and through Betcha as its online sister — is the only operator lawfully allowed to take racing and sports bets from a person in New Zealand, regardless of where that operator is incorporated. The calculator does not change under that rule. What changes is the set of prices it has to run on, and the protection a bettor gets if something goes wrong on the other side of the bet.

The four calculators in plain arithmetic

What a winning bet pays back

The basic return on a single bet is stake × odds, and the net profit is stake × (odds − 1). Decimal odds, the format TAB NZ publishes, already include the stake in the returned figure, so a $10 bet at $2.10 returns $21.00 — $10 of stake returned and $11 of profit on top.

For a combination bet — a multi, an accumulator — the prices of the legs multiply into one combined price. A three-leg multi at $1.60, $1.90 and $2.20 has a combined price of 1.60 × 1.90 × 2.20 = 6.688, and a $5 stake returns $33.44 if all three legs win. A same-game multi, which TAB NZ runs heavily in Super Rugby Pacific and NRL, is just a multi whose legs all come from one match; the math is identical. So is the trade-off: a long combined price looks attractive until one leg fails and the whole bet is voided.

The margin baked into the odds

Every market a bookmaker offers has a margin inside it. The margin is the slice of every dollar wagered the bookmaker expects to keep, and it is invisible in any single price — it only shows up when the prices of all the outcomes are added together. For a two-way market at decimal odds 1.90 and 1.90, the payout share — what a dollar wagered returns if it lands on the winner — is 1 ÷ (1/1.90 + 1/1.90) = 0.95, or 95.0%, and the margin is 1 − 0.95 = 0.05, or 5.0%. The same calculation against an asymmetric book of 1.50 and 3.50 gives a payout share of 1 ÷ (1/1.50 + 1/3.50) = 1 ÷ (0.6667 + 0.2857) = 1 ÷ 0.9524 = 0.975, or 97.5%, and a margin of 2.5%. A margin in the 2% to 6% range is ordinary for mainstream head-to-head markets; anything materially above that should make the bettor look twice.

A price research gives without a snapshot date cannot be quoted as a margin — it sits in a range and the range is the point. The illustrative two-way market at 1.90 / 1.90 above is the model’s worked example, not a price any operator is publishing right now.

What a free bet is worth

A free bet whose stake is not returned with a win is worth less than its face value. For a $10 free bet at odds of $2.50 on a market whose margin is 5.0% — the 1.90/1.90 example above — the expected value of the free bet is 10 × (2.50 − 1) ÷ 2.50 × 0.95 = 10 × 0.60 × 0.95 = $5.70. The free bet returns $5.70 of expected profit on average, not $10, because the stake is surrendered when the bet wins and the margin takes the rest. A free bet whose stake is paid back with a win — rare, and usually only on small promotional credits — is worth its face minus the margin.

The “risk-free” tag on a stake-refund offer changes the math again. If a losing first bet is refunded as a free bet, the refund is a free bet, not a cash refund, and the value is the free-bet formula above — not the value of the stake that was lost. The marketing word makes the offer sound symmetric. The arithmetic shows it is not.

What a bonus costs to clear

Where a bonus comes with a wagering requirement, the cost of clearing it is required turnover × margin of the market the clearing is done on. If a $100 bonus carries a 5× turnover on the bonus — $500 of qualifying bets — and the bettor plays on a market with a 5.0% margin, the expected cost is 500 × 0.05 = $25. A bonus that asks 10× the bonus plus deposit, played on the same 5.0% market, costs the bettor 10 × (100 + 100) × 0.05 = $100 of expected loss on a $100 deposit — the bonus has destroyed value before it paid anything. The page never quotes a TAB NZ turnover number, because TAB NZ’s published terms for any active promotion are the only honest source.

The calculator’s inputs: odds formats and what TAB NZ publishes

TAB NZ writes prices in decimal form. A price of $2.10 means a $10 stake returns $21.00 if it wins. New Zealand betting conventions do not use fractional odds for racing or sports, and TAB NZ’s site does not offer a switch.

Some offshore brands, including several on the comparison block below, offer American (+100), fractional (1/1) and other formats. The math does not change between formats, but the displayed number does, and a calculator only does its job if the format feeding it matches the format on the slip. TAB NZ’s app shows decimal odds as a single number after the runner or selection; the back of the slip carries the stake field and the return. The arithmetic lives between those two.

Three inputs every calculator needs:

1. The stake, in dollars, typed into the bet slip.
2. The odds, in the format the operator publishes, copied from the price on the market.
3. The outcome — whether the bet is a single, a multi, or one of TAB NZ’s racing bet types (Win, Place, Each Way, Quinella, Exacta, Trifecta, First Four, Quaddie, Big6).

For TAB NZ’s exotic bet types the per-leg math is the same, but the dividend on a tote pool is not knowable until the pool closes and is declared. A calculator can show what a fixed-odds return will be. It cannot show what a Quaddie dividend will be until after the running of the four legs.

How the calculator changes under New Zealand’s betting monopoly

The arithmetic above applies anywhere. The frame around it does not. Since the Racing Industry Amendment Act 2025 inserted section 74AAA of the Racing Industry Act 2020, only TAB NZ may offer racing betting, sports betting or other racing or sports betting to a person in New Zealand, regardless of where that person is resident or incorporated. The change took effect on 28 June 2025. The Department of Internal Affairs told providers serving New Zealand to withdraw with immediate effect. There is no licence to apply for and no licence register for bookmakers — there is only one lawful provider, so the register has one row in it.

For the calculator, three consequences follow.

The price feed is narrower than the offshore market. TAB NZ and Betcha are two online brands of one operator group. They are not rivals. Each brand runs its own prices, and a Same Game Multi on TAB may have a longer combined price than the same multi on Betcha on a given evening. There is no second lawful New Zealand bookmaker to compare against.

The complaint route is real. If a price is settled incorrectly, the bettor has a New Zealand regulator (DIA), a New Zealand harm-minimisation framework, a New Zealand self-exclusion that runs across both brands, and an account verified to a New Zealand address. An offshore brand taking the same bet is breaking New Zealand law by serving the bet at all, has no New Zealand complaints route, and the consumer safeguards it does offer are those of the jurisdiction it is licensed in — often none the bettor can practically reach.

DIA’s warning list is the right place to read the trade-off. The Department has publicly stated that overseas operators may be in jurisdictions with minimal consumer safeguards, may not return unspent credits, and may not pay out large wins. The page does not treat those warnings as proof that offshore bets always go wrong. It treats them as the cost a calculator does not capture — the part of the bet that lives outside the stake × odds math.

The legal frame: what may be bet on, by whom, and at what age

The single lawful channel

The Racing Industry Act 2020 established TAB NZ as the betting provider for racing and sports in New Zealand. The 2025 amendment added section 74AAA, which is the prohibition itself: no person other than TAB NZ may offer racing betting, sports betting or other racing or sports betting to a person in New Zealand, regardless of where that person is resident or incorporated. The amendment took effect on 28 June 2025.

TAB NZ runs the business under a 25-year operating agreement signed with Entain in 2023. Under the agreement, Entain runs the TAB business and is entitled to 50% of gross profits, with TAB NZ receiving at least $150 million a year for the first five years. Entain also made a one-off $100 million payment to the racing sector. The agreement is the reason TAB NZ’s app carries Entain-built features and the reason Betcha could be launched at all on the same technical base.

TAB NZ publishes two online brands — TAB and Betcha — and a national retail network. The two online brands are not separate bookmakers in any commercial sense; they share odds, settlement rules, and self-exclusion. The retail network takes fixed-odds and tote bets through the same engine.

What may be bet on

Racing and sports. Inside racing, TAB NZ’s published betting rules cover Win, Place, Each Way, Quinella, Exacta, Trifecta, First Four, Double, Treble, Daily Double, Running Double, Quaddie and Big6. Multis and Same Game Multis are defined for the sportsbook. Live betting is listed in the TAB NZ apps. Greyhound racing is closing in stages from 1 August 2026; from that date, no operator — TAB NZ or offshore — may take bets on greyhound races held in New Zealand.

The Online Casino Gambling Act 2026 licenses online casino gambling only. It does not change the betting monopoly, and TAB NZ’s right to apply for a casino licence does not extend that monopoly into casino. The page treats casino and betting as separate permits with separate rules.

Age, identity and address

The age for betting with TAB NZ is 18. The land-based casino age is 20. The two are not interchangeable. TAB NZ accounts need a verified New Zealand address and identity documents at signup; an exclusion applies across both TAB and Betcha and survives a brand switch.

There is no single national online-betting exclusion register. The register the casino law will require is for online casinos only. For sports and racing betting, the register is TAB NZ’s own self-exclusion across its two brands.

Tax, on the bettor side

Inland Revenue’s general position is that recreational gambling winnings are not taxable, and prize money from TAB horse, dog and trotting races is not taxable. A person who bets as a business is taxed differently. The page does not give tax advice. Inland Revenue or an accountant is the right next call for a reader whose betting has become income.

Tax, on the operator side

TAB NZ pays a Problem Gambling Levy of 0.74% of its betting revenue, in force from 1 July 2025 to 30 June 2028. Overseas operators supplying New Zealand residents pay online gambling duty of 12% of profits since 1 July 2024, rising to 16% from 1 January 2027. The page does not write that duty payment makes an offshore operator legal in New Zealand — duty is owed on unlawful supply as much as on lawful supply, and section 74AAA is about who may take the bet, not who has paid what tax.

What the law does not do

The law does not block offshore sites at the network level. It does not impose a penalty on the player: section 19(4) of the Gambling Act 2003, inserted in 2025, says an individual may not be convicted for placing a bet with an offshore betting operator in breach of section 74AAA. No source states a player-side penalty. The page does not call betting offshore illegal for the player, and it does not call it legal. The honest framing is the one DIA uses: TAB NZ and Betcha are the only lawful option, with New Zealand harm-minimisation tools, regulator oversight and a complaints framework; offshore supply is unlawful for the operator and carries the consumer risks DIA has listed. Neither is “the safe choice” by default.

Responsible gambling: the tools, the helpline, and what an exclusion actually does

Tools inside TAB NZ

TAB NZ’s app ships three controls: deposit limits, time-outs and self-exclusion. A deposit limit is a per-account ceiling the bettor sets, not one the operator sets; TAB NZ’s published terms describe the mechanism and the cooling-off period for raising a limit. A time-out is a short break — usually 24 hours to several weeks — during which the account cannot place bets. A self-exclusion is a longer commitment, with a minimum term set by TAB NZ’s own rules, during which the account is closed and cannot be reopened early.

The exclusion applies across both TAB NZ brands. A bettor self-excluded from TAB cannot open a Betcha account on the same identity, because both brands are operated by TAB New Zealand against the same customer record. This is one of the things that changes under the monopoly: a single exclusion genuinely cuts the legal market.

Tools the operator does not have to offer

There is no statutory per-bet cap. The cap, if there is one, is TAB NZ’s own commercial decision. There is no rule on staking with a credit card; whether TAB NZ allows it is a terms-of-service question, not a law question. There is no rule on crypto deposits to TAB NZ. The page does not generalise any of these into a “New Zealand rule”.

Help outside the operator

The free Gambling Helpline is 0800 654 655, with text support on 8006. Safer Gambling Aotearoa runs the national counselling framework TAB NZ links to. These are the right first calls for a bettor who feels their own betting, or a household member’s, has tipped out of control.

Harm minimisation, in statute

The Racing Industry Act 2020 requires TAB NZ to minimise the risks of problem and underage gambling. The duty is statutory; the lever is the Problem Gambling Levy and the host-responsibility obligations on TAB NZ’s retail outlets. The page does not pretend this duty has fixed anything by itself. It states the duty and the levy because they are what the statute says, and leaves the rest to the helpline.

Bonuses, free bets and what the calculator shows they are worth

The vocabulary the marketing uses

Three pieces of language recur on TAB NZ’s own pages and on every offshore brand that markets to New Zealanders. Each one names a specific cost the calculator exposes.

A “bonus bet” is a credit the operator credits to a balance, used to place a bet on the operator’s markets. The stake is usually not returned with a win, which is the free-bet math above: a $10 bonus bet at $2.50 has expected value of $5.70 on a 5% margin market, not $10. TAB NZ’s Bonus Cash and Mega Multi are bonus bets in this sense; both can be split across multiple bets and both carry terms that govern how the resulting winnings may be withdrawn.

A “boosted odds” offer is a one-off price improvement on a named selection. The boost applies to the single bet, not to a multi that uses the same selection. The math is the same — stake × boosted odds — and the cost is the margin the boost has not removed. A boosted price from $1.80 to $2.00 on a market at a 5% margin does not give the bettor an edge; it changes how the margin is split between the operator and the bettor on that single bet.

A “matched bet” or “hedged bet” is the bettor placing both sides of an outcome at different operators — for example, backing a runner with TAB NZ and laying the same runner on a betting exchange — so that one side pays regardless. New Zealand has no lawful betting exchange. The matched-bet “calculator” that calculates the lay stake from the back odds and the backer’s free bet has no New Zealand counterpart to feed its second number into, because no exchange is licensed to take the lay. The page describes matched betting as a math exercise, not a path a New Zealand bettor can walk.

What the calculator actually does with a TAB NZ promotion

Take the Mega Multi, where a multi of 4 or more legs falling short by a set number of legs returns up to $50 in Bonus Cash. The math on the multi itself is the multi math: each leg’s price multiplies into one combined price, the combined price returns stake × combined price on a clean win, and the bet is void if any leg voids. The Mega Multi pays on the losing multi, not the winning one. The bonus is Bonus Cash, which is itself a free bet subject to the math above. Two layers of margin; one bettor; one operator.

Reading the bonus terms before clicking

The single most useful calculator on the page is the one that runs in the reader’s head while reading a promotion. Three checks:

• What counts as a qualifying bet? Most promotions exclude cashed-out bets, bets placed with Bonus Cash, and bets at odds shorter than a stated minimum. The minimum is the part the marketing copy leaves out.
• How much must be turned over, and on what? Turnover on the bonus alone is cheaper than turnover on the bonus plus deposit. Wagering on slots is often nearly free of margin; wagering on a single-deck sports market is not.
• What is the cap on winnings? A free bet that pays up to a stated multiple of the free-bet amount caps the upside at a specific number. The math on the cap is the math on the free bet minus the cap.

TAB NZ publishes the terms of its own promotions on its site. The page describes the structure of those terms, not their numbers, because the numbers move.

How a multi is built, settled and paid out

A multi — also called an accumulator or parlay — is several selections combined into one bet. The combined price is the product of the legs’ prices. A $5 multi at combined price 6.688 returns $33.44 if all legs win, and zero if any one leg loses. That is the entire mechanic. Everything else is window dressing.

A Same Game Multi takes all its legs from one match. A $5 SGM on a Super Rugby Pacific match — back the All Blacks to win, the total score to be over 47.5, and the first try-scorer to be a specific player — is a single bet whose legs are correlated by design. The bookmaker’s margin on an SGM is wider than the margin on the same legs priced separately, because the correlation risk the bookmaker runs is real and is being paid for. A bettor who values an SGM by adding the legs’ implied probabilities will overestimate the SGM’s chance of winning; the margin is the difference.

A Same Race Multi is TAB NZ’s racing counterpart. Legs come from one race — runner to win, runner to place, head-to-head between two named runners. The mechanic is the same.

A Popular Multi is TAB NZ’s one-tap version: a pre-built multi the app shows as a single button, with the leg selection already made and the combined price already calculated. The one-tap is a UX shortcut, not a different bet. The math is the multi math, the settlement is the multi settlement, and the payout is stake × combined price.

A Place Extra is TAB NZ’s racing-specific extension on a win bet: punters back runners to finish up to 10th in selected races, with the place portion priced separately. The win portion settles as a win bet; the place portion settles as a place bet. Two bets on the one slip, priced independently.

A Quaddie is a pool bet: pick the winner of four named races, and the pool of stake money minus the operator’s take is divided among the winning tickets. The dividend is not knowable until the pool closes. A calculator can show the maximum dividend (if the bettor is the only winner) and the implied dividend at the current pool — both of which are functions of the pool size, not the runner prices.

A Big6 is the same mechanic, scaled to six races. Same dividend uncertainty, same calculator limit.

The arithmetic on a multi is trivial. The discipline is the leg selection: every leg added increases the combined price by multiplying, but it also multiplies the chance of failure. A four-leg multi at combined price 6.688 has an expected return that, at any margin below 25%, makes the bet a losing proposition on average. The same four legs as singles have a margin that is the average of the four leg margins, which is generally lower. Singles lose more often than a multi of the same legs, and win for less per win. Multis win rarely and win for more per win. The bettor’s choice is which shape of variance they want, not which bet is “safer”.

Other calculators the page does not pretend to run

The forecast and the trifecta

A forecast is naming the first and second runner past the post in the right order; a reverse forecast is the same two runners in either order. An exacta is a forecast on a specific race. A trifecta is naming the first three in order. A First Four is naming the first four in order. Each is a single bet with a single price — the dividend on a tote pool, or the fixed-odds price the operator publishes for the exotic. The math on a fixed-odds exotic is the standard stake × odds. The math on a tote exotic is the pool math, which the page does not derive, because the dividend is unknowable until the race closes the pool.

The hedging calculator

A hedging calculator takes an open back bet and computes the stake needed on the opposing lay bet to lock in a return regardless of the outcome. New Zealand has no lawful betting exchange; the lay side has no operator. A hedging calculator run on a TAB NZ back bet produces a lay stake that has nowhere to go. The page describes the calculator, notes it has no New Zealand second operand, and stops there.

The Kelly calculator

The Kelly criterion sizes a stake as a function of the bettor’s perceived edge and the price. The math is stake as % of bankroll = (odds × perceived probability − 1) ÷ (odds − 1). The bettor’s perceived probability is the entire input, and it is not knowable — it is the bet. A Kelly calculator run on the bettor’s own probability is the bettor’s own probability restated as a stake size. Most bettors who use one half-Kelly — half the formula’s output — because the bettor’s edge estimate is itself uncertain. The page notes the formula exists and that its input is opinion, not fact.

The Labouchere calculator

The Labouchere is a staking system: a list of numbers, stake the sum of the first and last on each bet, cross them off on a win, append the stake on a loss. The math is arithmetic; the system does not change the margin. The page notes the system exists and that no staking system changes the margin the bookmaker has already built into the odds.

The system calculator

A system bet is several multis drawn from a larger set of selections. A Trixie is three two-leg multis and one three-leg multi from three selections; a Yankee is six two-leg multis, four three-leg multis and one four-leg multi from four selections; a Canadian is the same structure on five selections; a Heinz is on six. The math on each leg is the multi math; the calculator’s job is to add the per-leg returns together for the strike rate the bettor wants to see. The page notes the calculator exists and that each leg is a separate bet on the same slip.

The arbitrage calculator

An arbitrage is backing all outcomes of a market at different operators such that the combined stake guarantees a return. The calculator takes the prices on each side and works out the stake split. In New Zealand the arbitrage does not have a second lawful operator inside the market. With TAB NZ and Betcha sharing an odds engine, the prices on the two brands do not differ enough to fund an arbitrage after the margin. The page notes the calculator exists and that the New Zealand market is one operator group, so the arbitrage is not a live trade here.

TAB NZ’s safer-gambling and product surface

TAB NZ’s app covers horse and harness racing, rugby union and rugby league and other sports, pre-match and live, with Trackside live race streaming and in-app betting. The app ships racing form, a Blackbook tool, a Jockey Challenge, a Same Race Multi, a Same Game Multi, one-tap Popular Multis, Place Extra, Bonus Cash and a Mega Multi. The wallet is a simplified deposit and withdrawal surface.

TAB NZ’s safer-gambling tools are deposit limits, time-outs and self-exclusion. The free Gambling Helpline is listed inside the app at 0800 654 655, with the text line at 8006. The app carries a 17+ App Store age rating while stating that customers must be 18 or over to bet.

Betcha’s product surface includes a Toolbox with daily odds boosts and insurance tools for bets that do not land, a Bet Social section where punters chat, follow tipsters and share bets or pools, and a Playbook with tips and match analysis. Betcha runs the same self-exclusion as TAB, because the two brands sit on the same operator record.

The reviewed bookmakers

TAB — the monopoly online brand

TAB is one of the two online brands of TAB New Zealand, the only provider lawfully offering racing and sports betting to people in New Zealand under section 74AAA of the Racing Industry Act 2020, in force since 28 June 2025. The TAB app carries fixed-odds and tote bets, racing form, Blackbook, Jockey Challenge, Trackside live race streaming, and a Same Race Multi, Same Game Multi, Popular Multi and Place Extra product set. Bonus Cash and the Mega Multi — a multi of 4+ legs that returns up to $50 in Bonus Cash if the multi falls short by a set number of legs — sit on top. Deposit limits, time-outs and self-exclusion are the safer-gambling controls. The exclusion applies across TAB and Betcha.

The verdict: TAB is the only legal route for a New Zealand resident who wants racing and sports betting under New Zealand law, and the route the calculator’s price feed comes from. The protection behind the bet — New Zealand identity verification, New Zealand regulator (DIA) oversight, New Zealand harm-minimisation framework, free Gambling Helpline — is the part the offshore brands do not offer and the part a reader cannot reconstruct by shopping the other players.

Betcha — TAB NZ’s online sister brand

Betcha is the second of the two online brands of TAB New Zealand, and it sits on the same TAB NZ odds engine and customer record as TAB. The product surface is the social one — Toolbox, Bet Social, Playbook — and the same social network is one tab away from the same TAB product set.

The verdict: for a New Zealand resident, Betcha is a second door into TAB NZ, not a second bookmaker. The calculator runs on the same prices; the self-exclusion cuts both brands; the safer-gambling controls are the same. For a reader who wants the calculator’s price feed and a more social product surface, Betcha is the place to look.

Sportaza — not licensed in New Zealand

Sportaza is licensed in Anjouan under ALSI-202606064-FI2. That licence gives Sportaza no right to take bets from people in New Zealand; only TAB NZ may do that under section 74AAA. The brand offers cash out before an event or market is finalised, a Bet Builder whose whole betslip voids if one selection voids, multiples, Asian lines and interval markets in 1, 5, 10 or 15 minute ranges.

The verdict: the product set is wide, the licence gives the bettor no New Zealand protection, and the price feed has no value to a calculator whose second operand is a New Zealand operator. The page is the comparison; the choice is the reader’s.

RTbet — not licensed in New Zealand

RTbet is licensed in Curaçao. That licence does not let RTbet accept New Zealand bets. The brand offers cash out before an event or market is finalised, fixes the cash-out amount at the moment it is accepted, and does not guarantee that the feature is always available.

The verdict: the cash-out mechanic is a real mechanic, the licence does not bridge to New Zealand consumer protection. A New Zealand bettor reading this entry should weight the math against the missing regulator.

BetNinja — not licensed in New Zealand

BetNinja states it is licensed by the Union of the Comoros. That licence does not entitle BetNinja to take bets in New Zealand. The brand does not publish a New Zealand-facing product feature list on the materials to hand.

The verdict: the licence does not bridge to New Zealand consumer protection; the brand does not appear in a New Zealand bettor’s lawful market. A reader who finds the brand offshore is reading a price feed the calculator will not validate against TAB NZ’s feed.

Alawin — not licensed in New Zealand

Alawin is not licensed to take bets from people in New Zealand under section 74AAA. The brand’s cash out lets a bettor lock in a win or loss before settlement, offers partial cash out, is not guaranteed to be available, and is not available on free bets or risk-free bets. The brand names no licence that applies in New Zealand.

The verdict: the partial cash-out feature is the genuine mechanic; the lack of a New Zealand licence is the genuine gap. The two are not the same trade.

Winz.io — not licensed in New Zealand

Winz.io is licensed in Anjouan and Tobique, under holder Novatrix SRL. Neither licence entitles Winz.io to offer bets to anyone in New Zealand. The brand names no New Zealand-facing product surface on the materials to hand.

The verdict: the licence frame does not reach New Zealand; the calculator’s price feed has no second operator inside the New Zealand market to compare against. A reader reading this entry is reading the brand, not the New Zealand market.

Rooster.bet — not licensed in New Zealand

Rooster.bet is operated by Novatrix SRL, a company incorporated in Costa Rica with registration number 3-102-893958, under e-gaming licence No. 0000002 issued by the Tobique Gaming Commission. That licence gives Rooster.bet no right to take bets from people in New Zealand. The sportsbook lists Live, Sports Promotions, Results, Schedule, E-sports and Predictions sections and shows odds in six formats.

The verdict: the brand is a real sportsbook, the licence is real in Tobique, and the licence is not real in New Zealand. The page is the comparison.

Rabona — not licensed in New Zealand

Rabona is licensed in Curaçao and launched on 23 December 2019 as the sixth online sportsbook of the Soft2Bet group. That licence gives Rabona no right to take bets from people in New Zealand. The brand does not publish a New Zealand-facing product feature list on the materials to hand.

The verdict: the operating history is the genuine context; the New Zealand gap is the genuine trade.

BetAlright — not licensed in New Zealand

BetAlright accepts customers over 18 years of age only and runs a separate partners site. The brand names no licence that applies in New Zealand. The brand does not publish a New Zealand-facing product feature list on the materials to hand.

The verdict: the age policy is the one transparent policy on the brand’s surface; the New Zealand gap is the trade. A New Zealand reader reading this entry is reading the brand, not the New Zealand market.

At a glance: the ten brands

The work in plain prose

The calculator exists to make the bettor’s expectation meet the math. Three habits do most of the work:

• Quote a price with a snapshot date. A price held up against a margin the calculator has worked out is useful for as long as both are current; a price held up against last week’s margin is not.
• Read the free-bet math on every promotion. A free bet is worth its face minus the margin, minus the cost of the stake not being returned, minus the cap on winnings if there is one. The arithmetic is the same on every promotion; the inputs are what move.
• Take the operator’s licence as seriously as the price. A New Zealand bettor has one lawful operator group — TAB NZ, through TAB and Betcha — and a long list of brands whose licences do not extend to New Zealand. The calculator does not see the licence. The bettor does.

The arithmetic is the easy half. The harder half is choosing which side of which margin the bettor wants to stand, and at what price.

Frequently asked questions

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

Only TAB NZ may offer racing and sports betting to a person in New Zealand, regardless of where the operator is resident or incorporated. TAB NZ operates two online brands — TAB and Betcha — and a national retail network. The change took effect on 28 June 2025 under section 74AAA of the Racing Industry Act 2020. Other brands that New Zealand players meet are not licensed to take bets from New Zealand residents.

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

The return is stake × odds in decimal form, and the net profit is stake × (odds − 1). For a multi, the legs’ prices multiply into one combined price, and the return is stake × combined price. A $10 stake at $2.10 returns $21.00 if it wins; a $5 multi at combined price 6.688 returns $33.44 if all legs win. The stake is returned as part of the figure, not on top of it.

What is the bookmaker’s margin and how can it be seen in the odds?

The margin is the share of every dollar wagered that the bookmaker expects to keep, and it shows up only when the prices on all outcomes of a market are added together. For a two-way market at 1.90 and 1.90, the payout share is 1 ÷ (1/1.90 + 1/1.90) = 0.95, the margin is 1 − 0.95 = 0.05, or 5.0%. The margin is the same number seen from the operator’s side; from the bettor’s side it is the slice of every dollar wagered the operator keeps on that market.

What does a player lose by betting with a bookmaker that has no New Zealand licence?

The player loses the New Zealand consumer protections that come with TAB NZ — New Zealand identity verification, regulator oversight by DIA, the New Zealand harm-minimisation framework, and the self-exclusion that runs across both TAB NZ brands. Offshore brands are licensed in other jurisdictions; the consumer protections the bettor has are the protections of the jurisdiction the licence is in, and the Department of Internal Affairs has publicly stated that overseas operators may be in jurisdictions with minimal consumer safeguards, may not return unspent credits, and may not pay out large wins. The page does not call offshore betting illegal for the player; it calls it unlawful for the operator.

From what age can bets be placed with TAB NZ, and what is checked when opening an account?

Bets may be placed from 18. The land-based casino age is 20 and the two are not interchangeable. TAB NZ accounts need a verified New Zealand address and identity documents at signup; an exclusion applies across TAB and Betcha. The TAB app carries a 17+ App Store age rating, which is the platform’s age gate and not TAB NZ’s own policy.

Are betting winnings taxed in New Zealand?

Recreational gambling winnings are generally not taxable in New Zealand, and prize money from TAB horse, dog and trotting races is not taxable. A person who bets as a business is taxed differently. The page does not give tax advice; Inland Revenue or an accountant is the right next call for a reader whose betting has become income. On the operator side, TAB NZ pays a Problem Gambling Levy of 0.74%; offshore operators supplying New Zealand residents pay online gambling duty of 12% of profits since 1 July 2024, rising to 16% from 1 January 2027.

Content created by the «leaguebetsnz» team