Sports betting calculators, explained for New Zealand bettors
Available in US
A betting calculator does nothing the maths behind a betting slip does not already do. Its value lies in doing it quickly and repeatedly, with the legs of a multi, the stake and the price of each leg entered in one place. In New Zealand, since 28 June 2025, the only operators lawfully taking online sports and racing bets from people in New Zealand are TAB NZ and its sister brand Betcha — every calculator run on a price from any other brand sits outside what the law permits, and the page below explains both, starting with the choice the regulator has actually left the reader with.
*Data current as of October 30, 2026, checked against the Department of Internal Affairs register and the Racing Industry Act 2020 (as amended in 2025).*
Why the calculator matters more than the bettor thinks
A punter who works out the return by multiplying stake by odds, then by odds again, then again, has done exactly what a multi-leg calculator does. The tool saves time. It does not change what the bookmaker keeps. Every price carries a margin — the slice of every dollar staked the bookmaker holds back on average — and that margin compounds across the legs of a multi. Two legs at 1.90 each are not the same price as one leg at 3.61, even when the maths reads that way; the bookmaker’s cut is taken on each leg, then again on the multiplied price.
The calculator’s real use is essentially not arithmetic. It is comparison. It tells the punter whether the multi being assembled is worth its stake, and it tells the punter whether the headline price on the betting slip is the price the bookmaker is actually offering once the margin of each leg is added up. A calculator run on prices the bookmaker has already published shows a return figure. A calculator run on the same prices, with the margin turned over separately, shows what the punter is giving up to the bookmaker to receive that return. The two numbers belong together. Neither one alone tells the full picture.
What a price actually says
Decimal odds are the standard in New Zealand. A price of $2.10 means a $10 stake returns $21 — the $10 stake back, plus $11 of profit — if the selection wins. A multi multiplies the prices of its legs: three legs at 2.10, 1.80 and 1.95 multiply to a combined price of about 7.37, and a $10 stake returns $73.70 if all three win. The arithmetic is the same whether the punter does it on paper or in an app; the app just runs it faster and avoids a keying error on the sixth leg.
What the price does not say is how much of every dollar staked the bookmaker expects to keep. That is the margin, and it sits inside the odds whether the bookmaker names it or not. The New Zealand punter who only looks at the price is seeing the bright side of the same line. The calculator cannot remove the margin, but it can show what the margin costs across the size of the multi.
What the calculator is for, in practice
Three uses, and only three, earn the name.
First, the payout. Stake times combined odds gives the return if every leg wins. The calculator does this for a multi with one or twenty legs in a few taps. Second, the comparison. Two bookmakers will rarely post the same price on the same selection; the calculator, fed both prices, shows the reader which line pays more for the same stake. Third, the planned stake. A punter who wants a fixed return works backwards from that return to a stake — divide the target return by the combined odds — and the calculator does the division faster than the punter does it on a betting slip.
A calculator cannot make a losing bet win. It cannot convert a marginal price into a strong one. It cannot tell the punter which selection will land. What it does, and does well, is take the human error out of a piece of arithmetic that humans get wrong at the third leg. In New Zealand, where the same operator takes most bets and the same multi structure is used across sports, that error-correction is the calculator’s job.
The New Zealand betting landscape, locked since 28 June 2025
The legal frame is short and unusually hard-edged. Section 74AAA of the Racing Industry Act 2020, inserted by the Racing Industry Amendment Act 2025 and in force from 28 June 2025, says 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 Department of Internal Affairs told providers serving New Zealand to withdraw with immediate effect. There is no licence to apply for, because there is only one lawful provider, and no register of bookmakers that does not list TAB NZ and Betcha — and Betcha is TAB NZ’s own online brand, not a rival.
TAB NZ’s partner Entain runs the TAB business under a 25-year agreement signed in 2023. Entain takes a 50/50 share of gross profits, and TAB NZ receives at least $150m a year for the first five years; Entain also pledged a one-off $100m payment to the racing sector. The arrangement does not change who may lawfully take bets in New Zealand; it changes who runs the operator that already held that right. New Zealand does not geo-block offshore websites. The law puts liability on the offshore operator, and the Department of Internal Affairs warns that overseas operators may sit in jurisdictions with minimal consumer safeguards, may not return unspent credits and may not pay out large wins. None of this is arithmetic. None of it can be made safer by a better calculator. Punters using a brand not licensed in New Zealand are using a brand the regulator has told to withdraw, and the punter’s protection against an unpaid winning bet on that brand does not run through the Department of Internal Affairs or any New Zealand court.
What that means for the punter’s calculator
A New Zealand punter who uses a calculator on a TAB NZ price is using it on a price set by a New Zealand-regulated operator whose terms the Department of Internal Affairs oversees. A New Zealand punter who uses the same calculator on a price from a brand not listed in this section is using it on a price set by an operator whose offer to people in New Zealand is unlawful under section 74AAA. The arithmetic is identical. The legal posture is not.
The punter is also advised that the law does not provide a New Zealand complaints route for an offshore brand, and the harm-minimisation tools New Zealand requires — deposit limits, time-outs and self-exclusion — apply only to TAB NZ’s two brands. Punters wanting those tools find them at TAB and Betcha; punters wanting a different brand are not getting the New Zealand framework with it. A calculator does not bridge that gap.
What may be bet on
TAB NZ takes fixed-odds and tote (pool) bets. Its published betting rules define Win, Place, Each Way, Quinella, Exacta, Trifecta, First Four, Double, Treble, Daily Double, Running Double, Quaddie and Big6, and Multis and Same Game Multis — a multi whose legs all come from one event. 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. Bets on politics and novelty markets are not established under New Zealand rules. The ban applies to events held inside and outside New Zealand.
Greyhound racing is closing in stages from 1 August 2026, and from that date offshore operators may not take bets on greyhound races either. Virtual (computer-simulated) sport is treated by the 2026 online casino law as casino gambling. Whether esports betting counts as “sports betting” under the Racing Industry Act is not established. None of this changes the calculator’s job. It changes what the punter feeds into it.
What TAB NZ and the Department of Internal Affairs do
TAB NZ accounts need a verified New Zealand address and identification. Accounts may be opened only by customers 18 or over — betting under 18 is an offence under section 89 of the Racing Industry Act 2020. TAB NZ’s app lists deposit limits, time-outs and self-exclusion, and an exclusion applies across both of its brands (TAB and Betcha). The free Gambling Helpline (0800 654 655, text 8006) and Safer Gambling Aotearoa are the New Zealand-funded help services. TAB NZ pays the Problem Gambling Levy of 0.74% of its betting revenue, in force from 1 July 2025 to 30 June 2028.
The Department of Internal Affairs is the gambling regulator under the Gambling Act 2003 and monitors compliance with the betting prohibition. There is no single national online-betting exclusion register; the register the casino law will require is for online casinos only and does not cover TAB NZ accounts. The Advertising Standards Authority’s Gambling Advertising Code applies to betting advertisements in New Zealand and bars targeting children under 14 or young people from 14 to under 18, judged by context, appeal and expected audience — a quarter or more of the audience counts as significant where accurate data exists. No New Zealand equivalent of a “whistle-to-whistle” advertising ban was found.
Tax, the player side
Inland Revenue guidance treats recreational gambling winnings as generally not taxable, and prize money from TAB horse, dog and trotting races is not taxable. A punter who bets as a business is a different case, and the general advice is to consult Inland Revenue or an accountant. The page is not tax advice. The point that matters for the punter’s calculator is that the calculator is working out the gross return the bookmaker pays, not the net figure after tax, because in the common case there is no tax for the punter to net against.
The operator side is different and does not change what the punter stakes. TAB NZ pays the Problem Gambling Levy. Offshore operators supplying New Zealand residents pay online gambling duty — 12% of profits since 1 July 2024, stepping up to 16% from 1 January 2027. A duty being payable does not make an offer lawful. The duty is on the operator; the prohibition is on the offer itself. New Zealand does not collect a duty from a brand that does not declare its New Zealand-facing business. Punters are advised not to read an offshore brand paying tax as a sign the brand is licensed in New Zealand, because the two obligations are not the same.
Responsible gambling tools the calculator does not change
A calculator is not a safer-gambling tool. It is a piece of arithmetic. The safer-gambling tools in New Zealand are the deposit limits, time-outs and self-exclusion listed in the TAB NZ app, and the help lines run on the TAB. The calculator helps a punter work out the size of a bet the punter has already chosen to place. The deposit limit, set by the punter, caps the size the calculator can work on. Both belong in the punter’s kit. Neither replaces the other.
The free Gambling Helpline (0800 654 655, text 8006) is the New Zealand-funded service. Safer Gambling Aotearoa runs harm-minimisation programmes funded by the Problem Gambling Levy. Punters who find themselves betting more than they planned, or chasing losses, or betting to recover mood, are the punters for whom those services exist. A punter who does not need them is not wrong to bet, but is advised to keep the deposit limit set and to read what they have set it to. The calculator cannot enforce a deposit limit. The punter can.
The Department of Internal Affairs warns that overseas operators may sit in jurisdictions with minimal consumer safeguards, may not return unspent credits and may not pay out large wins. None of that is arithmetic. None of it can be made safer by a better calculator. Punters using a brand not licensed in New Zealand are using a brand the regulator has told to withdraw; the punter’s protection against an unpaid winning bet does not extend to these operators.
The age and identity checks at TAB NZ
The TAB NZ app lists a 17+ App Store age rating and states customers must be 18 or over to bet. Account opening requires a verified New Zealand address and identification. The age check and the address check are run by TAB NZ under its own terms, and an exclusion applies across both of TAB NZ’s brands. The same does not run at an offshore brand. The punter’s age is not the regulator’s concern once the punter is on an offshore site; the punter’s age is the offshore site’s terms. These terms are set by the operator, not by New Zealand law.
Where the punter gets help in New Zealand
The Gambling Helpline (0800 654 655, text 8006) is free and confidential. Safer Gambling Aotearoa runs programmes funded by the Problem Gambling Levy. The punter’s own bank may also block card payments to gambling merchants at the cardholder’s request — that is a card-level setting, not a TAB NZ setting, and works across brands. A punter who wants to stop betting with TAB NZ can also self-exclude through the TAB NZ app; an exclusion is across TAB and Betcha. None of these tools are provided by a calculator. None of them are improved by a calculator. The calculator sits beside them.
Bonuses and free bets, and what they cost under the calculator
“Bonus bets” at TAB NZ are Bonus Cash the punter can split across multiple bets. The TAB NZ app lists a Mega Multi bonus of up to $50 in Bonus Cash when a multi of four or more legs falls short by a set number of legs. The terms and conditions apply to the bonus as they do to any headline promotion. A punter is advised to read them. The page is not the place to print a working code or a promotion currently on the TAB NZ site, because those change and a printed number is wrong the moment it changes.
What the page can do is show what a Bonus Cash offer costs. A $50 Bonus Cash offer that pays out as a free bet — whose stake is not returned with a win — is worth, on average, the free-bet amount times the expected profit per unit stake. The expected profit per unit stake is the odds minus one, divided by the odds, multiplied by the payout share of the market the bonus is bet on. The punter feeding numbers into a calculator that does not know the bonus is losing cash is advised to know the calculation on offer, and not the headline.
What the calculator says about a $50 free bet at $2.50
A $50 free bet, stake not returned, at decimal odds of 2.50. The expected value, averaged across many bets at that price on a market whose payout share is, say, 95%, is $50 × (2.50 − 1) ÷ 2.50 × 0.95 = $28.50. The free bet is worth about $28.50 on average. The punter’s stake on the bet was zero — TAB NZ paid it. The punter’s expected return was $28.50 on a $0 stake. The punter’s expected loss, on the same bet at the same price, is the stake times the margin of the market — zero in this case, because the punter’s stake was zero. The bonus costs the punter the difference between the bonus amount and its expected value: about $21.50 on a $50 free bet at $2.50 on a 95% market.
A punter who runs that through the calculator will see the expected value, not the headline. The punter who reads only the headline sees $50 and a free bet, and the $21.50 is invisible until the terms make it visible. The page’s job is to make the invisible visible, because the punter cannot make a good decision on a number they have not seen.
What a turnover requirement does
A turnover requirement is the dollar volume of bets the punter must place, at or above a minimum price, before a bonus converts to withdrawable cash. A $100 bonus with a five-times turnover requirement at minimum odds of 1.50 means the punter must place $500 of qualifying bets, each at 1.50 or higher, before the bonus — and any winnings on it — can be withdrawn. The punter feeding the bonus into a calculator is advised to also feed in the turnover; the bonus is not the punter’s contribution to the betting volume, it is the volume itself.
The expected cost of clearing that turnover, on a market whose margin is 5%, is $500 × $0.05 = $25. That is the average cost across many bets at the minimum price on a market with a 5% margin. The punter who chooses a higher price to satisfy the minimum and a lower-margin market to clear the volume pays less. The punter who chooses a high-margin novelty market because the bonus allows it pays more. The calculator shows the difference.
Predictions, systems and the analytics the calculator cannot supply
A betting system is a staking plan — Labouchere, Fibonacci, Martingale — that decides the size of the next bet from the result of the last one. A reverse forecast bet names the first and second finishers in either order. Neither is a prediction of who wins. The system sizes the bet. The forecast names the order. Neither one removes the margin the bookmaker charges, and neither one converts a marginal price into a strong one. The calculator, fed the prices the bookmaker posts, shows the payout of the plan; the plan, fed only what the calculator knows, does not improve the prices.
Labouchere and Martingale have the same shape: a long losing run costs the punter a stake that grows with each loss, and the run ends only when a win lands. A multi-leg multi has the same shape, in a different costume — the longer the multi, the higher the multiplied odds, the lower the chance that every leg lands. The maths is honest about both. The marketing around both usually is not.
What a system calculator does well
A staking plan calculator takes the unit, the target, the loss limit and the sequence, and works out the size of each stake. It does this quickly. It does not change the underlying prices. It does not give the punter an edge over the bookmaker. It does take arithmetic out of a plan that a punter might otherwise execute on the back of an envelope, and the punter who runs out of envelope is the punter whose staking plan goes wrong.
What a system calculator cannot do
A system calculator cannot beat the margin. A multi of eight legs at 1.20 each multiplies to about 4.30. Eight legs at 1.20 each, on a market whose margin is 5% per leg, compound to a margin that is much larger than 5% on the multiplied price. The punter feeding the legs into a multi calculator sees the return. The punter who also wants to see the compound margin has to feed the margin in separately, leg by leg, and add it up. Most calculators do not do that for the punter. The page does.
Bet types, odds formats and how the calculator handles each one
New Zealand uses decimal odds. TAB NZ’s betting rules define Win, Place, Each Way, Quinella, Exacta, Trifecta, First Four, Double, Treble, Daily Double, Running Double, Quaddie and Big6 for racing, and Multis and Same Game Multis for sports. A calculator that does not handle each way — the bet that pays part of the win price for a place finish — will give the punter the wrong return on an each-way bet. A calculator that does not handle a Same Game Multi will multiply legs across sports and give the punter a multi that does not exist.
Decimal odds have the simplest relationship with return: stake times odds is the return, including the stake. Fractional odds have the same return: stake times fractional odds, plus the stake back. American odds have a sign: a positive American price says the punter wins that amount on a $100 stake, plus the stake back; a negative American price says the punter stakes that amount to win $100, plus the stake back. The calculator that converts between them is doing nothing the punter cannot do on paper, but the conversion is harder to do on a betting slip, and the calculator earns its keep on the conversion.
Each way
An each-way bet is two bets at the stake the punter has entered — one on the win, one on the place. The place pays a fraction of the win price: TAB NZ’s place terms set that fraction, often a quarter or a fifth, depending on the field. The punter feeding an each-way bet into a calculator needs to enter the stake as the unit, not the total — the total is twice the unit, and the calculator expecting a total will double the figure and give the wrong return.
Same-Game Multis
A Same Game Multi takes its legs from one event. TAB NZ lists the format in its apps. A leg from a different event is a regular multi. The calculator cannot tell the difference — it just multiplies prices — but the bet cannot be placed across events as a Same Game Multi. The punter is advised to know which multi they are building before the calculator runs. The TAB NZ betting slip enforces it; the calculator on the punter’s phone does not.
Cash out is not a calculator
Cash out is the bookmaker’s offer to settle the bet early, at a price the bookmaker names. TAB NZ’s terms govern the price; the punter does not negotiate it. The punter feeding the cash-out figure into a return calculator will see what TAB NZ is offering, not what the bet is estimated to have paid at full-time settlement. The two are different. The punter using a calculator to decide whether to cash out is comparing the bookmaker’s offer against the punter’s estimate of what the bet will pay later — and the bookmaker’s offer already has a margin inside it. The calculator shows the offer. It does not improve it.
The margin, illustrated on a two-way market
Take an evenly-priced two-way market at decimal odds of 1.90 on each side. The payout share of that market is 1 divided by (1 ÷ 1.90 plus 1 ÷ 1.90), which is 1 divided by (0.5263 + 0.5263), or 1 divided by 1.0526, or about 95.00%. The margin is 1 minus 95.00%, or about 5.00%.
That is the cleanest expression of what the margin is. On every dollar staked across both sides of this market, the bookmaker keeps about five cents on average and pays back about 95 cents. Two cents either way is not unusual — sportsbook margins of 3% to 8% on mainstream markets are ordinary, and live markets can run higher. The punter feeding the price into a calculator sees the return on a winning bet. The punter who also feeds the price into the margin calculation sees the cost of the return on every bet, won or lost, on average.
What a 5% margin costs a punter over a season
A punter staking $10 on 200 bets across a season, at average odds of 1.90, on a market whose margin is 5%, stakes $2,000 in total. The expected cost of that volume, on the same market, is $2,000 × 0.05 = $100. That is the average cost across many such seasons. The punter who wins on 100 of those bets at average odds of 1.90 receives $10 × 1.90 × 100 = $1,900 in returns, and pays $1,000 in stakes on the losing bets, for a net of $900 on stakes of $1,000. The punter who wins on 105 of them receives $1,995 in returns on $950 in losing stakes, for a net of $1,045 on stakes of $1,000. The punter who wins on 95 of them receives $1,805 in returns on $1,050 in losing stakes, for a net of $755 on stakes of $1,000.
The expected net, averaged over many such seasons at a 52.6% strike rate (the rate at which the punter breaks even at 1.90 odds on a 5% margin market), is the stake times the payout share minus the stake, or about −$100 on $2,000 staked. The punter feeding these numbers into a calculator sees the win side. The punter feeding the same numbers into the margin calculation sees the cost side. The two numbers belong together.
What a 5% margin looks like across a multi
Three legs at 1.90 each multiply to 6.86. Three legs at 1.90 each, on a market whose margin is 5% per leg, compound to a much higher effective margin on the multiplied price. The compounding is not a simple sum — the multiplied price of 6.86 corresponds to a payout share of about 91.0% on the multi as a whole, or a margin of about 9.0%. The punter feeding three legs at 1.90 into a multi calculator sees the multiplied price. The punter who also feeds the margin into the per-leg calculation sees the cost of the multi as a single bet. The difference between 5% and 9% is what the punter pays to take three shots at three events rather than one shot at one event.
The longer the multi, the larger the compounding. A five-leg multi at 1.50 each multiplies to 7.59, but the per-leg margin on a market that prices at 1.50/2.50 (a 5.6% margin on the two-way market) compounds across five legs to a margin of roughly 25% on the multiplied price. The punter feeding five legs at 1.50 into a multi calculator sees a price that looks generous. The punter who also feeds the margin into the per-leg calculation sees a compounded cost that is anything but. The calculator shows the price. The margin calculation shows what the price costs.
Why the band, not the figure
The page states the margin as a band, not a single number, because a margin on a two-way market at 1.90/1.90 is exactly 5.00% only when the prices are exactly 1.90 on each side and the market is exactly two-way. Live markets, three-way markets (1X2), handicap markets, total-goals markets and outright markets each price differently, and each carries its own margin. The punter feeding a single price into a margin calculation will get a single number; the punter is advised to treat that number as the figure for that market, on that snapshot, with those prices. Markets move. Snapshots age. The band the page names — roughly 3% to 8% on mainstream pre-match markets, higher on live markets and on smaller events — is the band the punter is advised to expect when the prices are honest and the books are competitive. A price outside the band is either a generous headline or a misprint, and the punter is advised to check before staking.
Reviewed bookmakers
The set below covers the two TAB NZ brands first, then bookmakers that are not licensed in New Zealand but that New Zealand punters meet. A brand licensed for online betting in another jurisdiction is not, by that fact, licensed in New Zealand, and the permissions granted to TAB NZ do not extend to offshore brands. The regulatory differences are fundamental.
| Brand | New Zealand status | What the operator’s own terms state on the calculator’s subject |
|---|---|---|
| TAB | TAB NZ brand — the only lawful provider of online sports and racing bets in NZ | Decimal odds; fixed-odds and tote (pool) bets; Win, Place, Each Way, Quinella, Exacta, Trifecta, First Four, Double, Treble, Daily Double, Running Double, Quaddie and Big6; Multis and Same Game Multis; Same Race Multis and Same Game Multis; one-tap Popular Multis; Place Extra to finish up to 10th in selected races; Trackside live race streaming with in-app betting |
| Betcha | TAB NZ brand — the only lawful provider of online sports and racing bets in NZ | Daily Toolbox with odds boosts and insurance tools for bets that do not land; Bet Social with tipsters, chat, shares and pools; Playbook with tips and match analysis; decimal odds standard |
| Sportaza | Not licensed in New Zealand | Cash out before settlement; Bet Builder — voids the betslip if any one selection is void; multiples; Asian lines; interval markets in 1, 5, 10 or 15 minute ranges |
| RTbet | Not licensed in New Zealand | Cash out before settlement; cash-out amount fixed at the moment it is accepted; availability of cash out not guaranteed |
| BetNinja | Not licensed in New Zealand | No information on multi or bet-builder features was available from the brand’s own terms |
| Alawin | Not licensed in New Zealand | Cash out locks in win or loss before settlement; partial cash out; availability not guaranteed; not available on free bets or risk-free bets |
| Winz.io | Not licensed in New Zealand | No information on multi or bet-builder features was available from the brand’s own terms |
| Rooster.bet | Not licensed in New Zealand | Sportsbook sections for Live, Sports Promotions, Results, Schedule, E-sports and Predictions; six odds formats |
| Rabona | Not licensed in New Zealand | No information on multi or bet-builder features was available from the brand’s own terms |
| BetAlright | Not licensed in New Zealand | Accepts customers 18 and over; separate partners site at partnersbetalright.com; no information on multi or bet-builder features was available from the brand’s own terms |
TAB
TAB is one of two online brands of TAB NZ, the only provider lawfully offering racing and sports betting to people in New Zealand since 28 June 2025. Section 74AAA of the Racing Industry Act 2020 is the statutory hook; there is no licence register for bookmakers because there is only one lawful provider. TAB’s published betting rules define fixed-odds and tote bets, and the multi-leg and Same Game Multi formats the calculator handles. The TAB NZ app covers horse and harness racing, rugby union, rugby league and other sports, pre-match and live, and carries a 17+ App Store age rating while stating customers must be 18 or over to bet.
Account opening requires a verified New Zealand address and identification, and the app lists deposit limits, time-outs and self-exclusion as harm-minimisation tools. The free Gambling Helpline (0800 654 655, text 8006) and Safer Gambling Aotearoa are listed alongside those tools. New TAB NZ customers can receive Bonus Cash that can be split across multiple bets, and the app lists a Mega Multi bonus of up to $50 in Bonus Cash when a multi of four or more legs falls short by a set number of legs. The terms and conditions apply. TAB NZ pays the Problem Gambling Levy of 0.74% of betting revenue, in force from 1 July 2025 to 30 June 2028.
TAB is the calculator’s home turf. The punter feeding a TAB NZ price into the calculator is feeding it the price set by a New Zealand-regulated operator. The punter feeding an offshore price into the same calculator is feeding it a price whose offer to people in New Zealand is unlawful under section 74AAA, and the harm-minimisation tools the punter uses at TAB do not reach the offshore brand.
Betcha
Betcha is the second online brand of TAB NZ. It is not a rival to TAB; it is the same operator group under a different product name. Its published app description lists a daily Toolbox with 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. The calculator handles all of these as odds inputs — the boosts raise the price, the insurance pays out on near-misses, the Playbook and Bet Social feed selections in.
Betcha shares TAB’s account framework: 18+ to bet, verified New Zealand address and ID, and the same harm-minimisation tools (deposit limits, time-outs and self-exclusion). An exclusion at one TAB NZ brand applies at both, because they are the same operator group. The punter who excludes from TAB excludes from Betcha, and the punter who excludes from Betcha excludes from TAB. The two brands are the only lawful places a New Zealand punter can place a multi on a Same Game Multi, take an odds boost on a New Zealand event, or use a Same Race Multi — and the page does not split the choice between them, because the choice between TAB and Betcha is a choice of product shape, not a choice of operator.
Sportaza
Sportaza operates without a New Zealand licence. Its Anjouan licence (ALSI-202606064-FI2) does not authorise betting offers to people in New Zealand under section 74AAA of the Racing Industry Act 2020. The operator does not reach the punter in New Zealand; there is no local complaints avenue.
Sportaza’s terms offer cash out before an event or market is finalised, a Bet Builder feature that voids the betslip if any one selection is void, multiples, Asian lines and interval markets in 1, 5, 10 or 15 minute ranges. Each of those is a feature a New Zealand punter might use, and each of those features sits inside an offer to the punter that New Zealand law treats as unlawful. A punter who uses Sportaza from New Zealand does so without the New Zealand harm-minimisation framework, without a New Zealand complaints route, and against the Department of Internal Affairs’ stated warning that overseas operators may not return unspent credits and may not pay out large wins. The calculator handles the prices. The legal posture is the punter’s.
RTbet
RTbet is not licensed in New Zealand. The brand holds a Curaçao licence, which confers no right to offer betting services to New Zealand residents. RTbet’s terms offer cash out before an event or market is finalised, fix the cash-out amount at the moment it is accepted, and state that availability of the cash-out feature is not guaranteed. The fix-at-acceptance clause is standard for this operator.
A New Zealand punter using RTbet does so without New Zealand harm-minimisation tools and without a New Zealand complaints route. The punter’s protection against an unpaid winning bet on RTbet does not run through the Department of Internal Affairs. The calculator shows what RTbet’s prices pay; it does not show what RTbet’s operator framework covers.
BetNinja
BetNinja is not licensed in New Zealand. The brand states that it is licensed by the Union of the Comoros, which does not allow it to operate in New Zealand. BetNinja’s terms were unclear regarding multi or bet-builder features. Punters are advised to verify all feature availability directly with the operator before staking.
Alawin
Alawin is not licensed in New Zealand. The brand names no licence that applies in New Zealand. Alawin’s terms offer cash out that locks in a win or loss before settlement, partial cash out, and state that availability is not guaranteed and that cash out is not available on free bets or risk-free bets. The “not available on free bets” line is the line the punter is advised to read before treating a “risk-free” headline as a refund, because the refund is paid as a free bet whose stake is not returned.
Winz.io
Winz.io is not licensed in New Zealand. The brand holds Anjouan and Tobique licences under holder Novatrix SRL, neither of which permits it to accept bets from New Zealand-based punters. Specifics on multi-bet capabilities were not clearly stated in the brand’s provided terms.
Rooster.bet
Rooster.bet is not licensed in New Zealand. The brand 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, which gives no right to take bets from people in New Zealand. Rooster.bet’s sportsbook lists Live, Sports Promotions, Results, Schedule, E-sports and Predictions sections and shows odds in six formats. A New Zealand punter using Rooster.bet does so without New Zealand harm-minimisation tools and without a New Zealand complaints route.
Rabona
Rabona is not licensed in New Zealand. The brand holds a Curaçao licence, which does not permit betting offers to New Zealand residents. Rabona launched on 23 December 2019 as the sixth online sportsbook of the Soft2Bet group. Information on its multi and bet-builder features remains unverified by the operator’s current public terms.
BetAlright
BetAlright is not licensed in New Zealand. The brand names no licence that applies in New Zealand. BetAlright’s terms accept customers 18 and over, list a separate partners site, and did not return information on multi or bet-builder features. The 18+ age floor is the operator’s own term; a New Zealand punter using BetAlright does so without the New Zealand age-verification framework.
The verdict, in one place
TAB is the only lawful choice for a New Zealand punter, and Betcha is its sister brand within the same operator group — the choice between them is product shape, not operator. Both offer the multi-leg and Same Game Multi formats the calculator handles, and both sit under the New Zealand harm-minimisation framework. The eight brands not licensed in New Zealand offer features the calculator can use, but they sit outside the New Zealand legal frame and outside the New Zealand complaints framework, and the Department of Internal Affairs has told offshore providers serving New Zealand to withdraw with immediate effect. The punter’s calculator does not bridge that gap. The punter’s choice does.
How the calculator fits into a New Zealand betting week
The calculator is a tool, and the punter uses it the way a punter uses any tool — at the point in the betting week where the tool earns its keep. Three points, in the order the punter meets them.
First, the build. The punter selects the legs of a multi — a Same Game Multi on a Super Rugby Pacific match, a Same Race Multi on a Melbourne Cup runner, a multi across a Black Caps ODI and an NRL game — and feeds the prices into the calculator. The calculator returns the multiplied odds and the return on the punter’s planned stake. That figure is what the punter sees on the betting slip. The punter is advised to also look at the per-leg margin, which the punter has to feed in separately, and the effective margin on the multi as a whole. A 5% per-leg margin on a three-leg multi is closer to 9% on the multiplied price. The calculator shows the return. The margin calculation shows the cost of the return.
Second, the compare. The punter sees a boost on one leg — a “Boosted Odds” tag on Betcha, a “Popular Multi” one-tap on TAB. The boosted price is higher than the un-boosted price on the same selection. The punter feeding both into the calculator sees the difference in return. The boost is a marketing offer with a maximum stake, often a maximum payout, and sometimes a market restriction that excludes the boosted leg from other promotions. The punter reading those terms before staking is the punter who knows what the boost costs the brand and what it returns the punter.
Third, the settlement. The punter’s multi lands, or does not. The TAB NZ app settles the bet and credits the return to the punter’s wallet. The punter does not need a calculator at this point; the punter needs the terms the bet was placed under. A punter who placed the bet under an old set of terms — a set of terms the punter did not read because the punter trusted the marketing — is the punter who finds the cash-out restriction, the bonus conversion limit, or the maximum-payout cap after the bet has settled. The calculator does not help at this point. Reading the terms at the build does.
The betting week, in summary
TAB and Betcha are the two lawful brands. Decimal odds are the standard. Multis and Same Game Multis are the multi formats the calculator handles. The punter’s tools are the calculator, the betting slip, and the terms the bet was placed under — in that order. The punter’s protections are the deposit limit, the time-out, and the self-exclusion, plus the Gambling Helpline and Safer Gambling Aotearoa. None of these is provided by a calculator. All of them sit beside one.
The arithmetic the page stands on
The two numbers above — the 5.00% margin on an evenly-priced two-way market at 1.90/1.90, and the band of roughly 3% to 8% on mainstream pre-match markets — are the arithmetic the page builds on. The first is exact, given the prices. The second is a band because no single margin describes a market that moves. Both come from the formula the page names in the margin section: payout share equals 1 divided by the sum of 1 divided by each price; margin equals 1 minus payout share. The punter running the formula on a different pair of prices gets a different figure, and the punter running the formula on a three-way market (1X2) gets a different formula and a different figure. The page does not run the formula for the punter on every market; it names the formula and shows it on one market, then leaves the punter to run it on the markets the punter bets on.
The compounding effect across a multi is the same arithmetic in a different costume. The punter who knows the per-leg margin can compound it across the legs of a multi. The punter who knows the multiplied price can work back to the effective margin on the multi as a whole. The page shows the compounding on three legs at 1.90 each — a per-leg margin of 5.00% compounding to an effective margin of about 9.00% on the multiplied price — and on five legs at 1.50 each — a per-leg margin of 5.60% compounding to an effective margin of roughly 25.00% on the multiplied price. Both are exact, given the prices and the per-leg margin.
Frequently asked questions
Which bookmaker may lawfully take sports and racing bets in New Zealand?
Since 28 June 2025, only TAB NZ may offer online sports and racing bets to people in New Zealand, under section 74AAA of the Racing Industry Act 2020. TAB NZ runs two online brands, TAB and Betcha; both are the same operator group. No other brand is licensed to take bets from people in New Zealand, and no licence register for bookmakers exists because there is only one lawful provider.
How is the return on a bet worked out from the stake and the odds?
For a single bet at decimal odds, the return equals the stake multiplied by the odds, including the stake. A $10 stake at 2.10 returns $21 — the $10 stake back, plus $11 of profit. For a multi, the odds of the legs multiply into one combined price, and the same stake-times-odds rule applies to the combined price.
What is the bookmaker’s margin and how can it be seen in the odds?
The margin is the slice of every dollar staked the bookmaker keeps on average. It sits inside every price the bookmaker posts. On a two-way market priced at 1.90 on each side, the payout share is about 95.00% and the margin is about 5.00%. The punter sees the prices; the margin is the gap between the prices and the 100% the prices total at fair value.
What does a player lose by betting with a bookmaker that has no New Zealand licence?
The player loses the New Zealand harm-minimisation framework: deposit limits, time-outs and self-exclusion through the TAB NZ app, and the complaints route through the Department of Internal Affairs. Offshore operators offering bets to people in New Zealand are breaking section 74AAA of the Racing Industry Act 2020.
From what age can bets be placed with TAB NZ, and what is checked when opening an account?
TAB NZ customers must be 18 or over to bet; betting under 18 is an offence under section 89 of the Racing Industry Act 2020. Account opening requires a verified New Zealand address and identification. The TAB NZ app carries a 17+ App Store age rating and states the 18+ requirement in its own description.
Are betting winnings taxed in New Zealand?
Inland Revenue guidance treats recreational gambling winnings as generally not taxable, and prize money from TAB horse, dog and trotting races is not taxable. A punter who bets as a business is a different case and is advised to consult Inland Revenue or an accountant. The page is not tax advice; the figures the calculator returns are the bookmaker’s gross payouts, not the punter’s net-of-tax figures.
Tips & strategy – footballbetsnz
Content created by the «footballbetsnz» team
