Boxing betting tips: how predictions are actually built

Updated October 2026

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This is not a tip sheet. Nobody on this page names a winner, because nobody looking at a fight card ahead of time knows the outcome with the certainty a tip would require. What this page does is show how a prediction is put together — what inputs go in, how to weigh them, and how to read the bookmaker’s price once the numbers are in front of you. The rest is bankroll discipline, the kind that keeps the account open long enough to learn anything at all. Read it as a methodology, not a forecast.

Current as of October 30, 2026 and cross-checked against the Gambling Commission’s public register of licence holders for Great Britain.

Reading the odds before you read the form

Every punter who has ever lost on a “lock” started the same way: they looked at the two fighters and ignored the decimal figure beside the favourite’s name. The price is the market’s settled view, distilled from sharp money, the betting public and the bookmaker’s own margin. Reading it before anything else is one of those habits that costs nothing to build and saves a fortune over a season.

Take a two-way market priced 1.90 / 1.90 — a clean even-money line. The decimal odds 1.90 look enticing, but the bookmaker’s margin is what sits underneath. The implied probability of each outcome is 1 / 1.90 = 52.63%, so the two prices sum to 105.26%. That five-point-something excess, scaled down, is the overround: the cut the bookmaker keeps of every unit wagered on this market. Worked one way the payout share is 1 / 1.0526 = 95.0%; worked the other way the margin is 1 − 0.950 = 5.0%. So a £10 stake at 1.90 returns £19.00 on a win; the punter keeps £9.00 of profit, and the bookmaker pockets roughly 50p of every £10 wagered across the market in the long run. Five per cent looks slim. It is, until you start placing bets daily.

That 5% band is a condition, not a number: it is what an even-money two-way line tends to look like once the bookmaker has balanced the book on both sides. Real fight markets rarely sit that low. Heavily lopsided prices — 1.10 against 6.00 — push the margin well above 8%. The thinner the price on either side, the more the bookmaker has built into the line. Recognising this is half the work of boxing betting, because every other piece of analysis downstream depends on having a price the punter trusts enough to act on.

What a tip is, in plain terms

A tip is a claim that the published price underestimates one fighter’s chance. The tipster believes X wins more often than the odds imply; the gap between the tipster’s probability and the market’s implied probability is the “edge”. When the edge is real and large enough to overcome the margin, the bet is what the market calls a “value bet” — a price above the true probability once the bookmaker’s cut is taken out.

Two things follow. First, a tip can be correct in direction and still lose money, because a 55/45 favourite who wins 55% of the time still loses 45% of the time, and the margin gnaws at every pound regardless. A coin-flip bettor at even money with 5% overround loses 5% of turnover to the bookmaker before the result is even known. Second, the tipster’s edge is unverifiable in advance. Nobody — no algorithm, no trainer, no journalist — knows with confidence whether the published 1.70 favourite is really a 1.55 horse. That uncertainty is the whole sport of betting, and it is why the next section of this page exists.

How a prediction is built

A serious fight prediction is a stack of small inputs, not a hunch. Five of them do most of the work.

Recent form. Last three to five fights, scored on outcome and quality of opposition. A late stoppage win against a journeyman opponent is worth less than a points loss to a ranked contender; the record alone conceals the difference.

Style match-up. The single most predictive factor in boxing. A swarmer with a granite chin against a stationary boxer who can’t get out of the way is one fight; the same swarmer against a fleet-footed counter-puncher is a different fight. Reach, height, stance (orthodox or southpaw), and the way each fighter reacts under pressure shape this more than records do.

Physical data. Reach, height, age, weight on fight night. A late-career fighter whose punch output has dropped by 20% carries that drop into every market. Reach advantage exceeding 4 inches tends to compound across a long fight; an inch or two matters less.

Stamina and round projection. Ten-round and twelve-round fights strain endurance in ways four-rounders do not. A fighter whose cardio collapses past round six is a different bet in a six-rounder than in a twelve-rounder, even with the same opponent and price.

The number that matters: the price itself. Once the form is read, the match-up is sized and the stamina note is filed, the question is whether the bookmaker’s line still offers value. If the tipster’s probability is 60% and the market implies 55%, the bet has edge. If the tipster’s probability is 53% and the market implies 58%, the bet has no edge despite looking attractive at the headline price.

The fifth input is the only one that turns analysis into a stake, and it is the one tipsters most often skip. A prediction built on form alone, with no price check, is a prediction published for readers rather than for the bettor’s own account.

The shapes of bet a punter can place

A boxing card offers more markets than most newcomers realise. Five of them cover nearly every wager a UK punter will place.

The single. A bet on one outcome: Fighter A to win, the fight to go the distance, total rounds over 8.5. The cleanest market on the card and the easiest one to model. Decimal odds stated; fractional odds on the same selection run in parallel.

The each-way. A bet that splits into two equal stakes: one on the win, one on a place finish (typically by judges’ decision or, in some markets, by stoppage). Each-way doubles the stake but halves the risk on a tight favourite. Place terms vary by operator and by fight, so reading the betting slip before placing is a habit worth keeping.

The accumulator. A series of singles whose odds multiply into one price. Three legs at 1.60, 1.80 and 2.00 price up to 5.76 — meaning a £10 stake returns £57.60 if all three land. The same three singles placed individually return the same amount on each win but lose the entire stake on any defeat. Accumulators carry a 10x bonus cap on licensed UK operators: a £10 bonus at the old 50x requirement needed £500 of qualifying bets; under the cap no bonus asks for more than £100 of qualifying stakes.

Bet Builder / same-game multi. A single fight used to produce an accumulator of its own outcomes: method of victory, total rounds, fighter to win in round X. Each leg pulls from the same fight, and the operator’s build engine multiplies the implied probabilities. Tread carefully — the margins on the constituent legs compound.

Cash out. Settling a bet before the fight ends, at a price the bookmaker quotes based on what has happened so far. The cash-out price reflects the book’s updated view, plus its margin. A punter who would not place the original bet at the current cash-out price should not cash out.

The bookmakers’ margin and where it hides

The margin is invisible in the price the punter sees, but it is there on every market. Headline prices look like rewards; the margin is the tax the punter pays for the privilege of placing the bet in the first place.

The arithmetic is mechanical. For a two-way market at decimal odds a and b, the margin is 1 − 1 / (1/a + 1/b). Worked at 1.90 / 1.90, margin = 1 − 1 / (0.5263 + 0.5263) = 1 − 0.95 = 0.05 — five per cent. Worked at 1.40 / 3.00, the implied probabilities sum to 0.7143 + 0.3333 = 1.0476, payout share 95.45%, margin 4.55%. The thinner the favourite’s price, the lower the margin tends to drop on a balanced book; the more lopsided the prices, the higher the margin climbs.

Why this matters in practice: a punter placing £100 on the favourite at 1.20 (implied probability 83.3%) wins £20 profit when the result lands — and loses the entire £100 when it does not. The bookmaker needs only one upset in five to break even on that market. Across a season of single-bet favourites, the margin compounds faster than the punter’s flat-stake discipline, and that is the cause of most long-term losses that look like bad luck. The bookmaker is not the punter’s enemy; the bookmaker is the punter’s landlord.

Boxing markets and how they’re settled

Professional boxing bouts usually run 10 to 12 rounds, with four-round fights common for newer fighters. Each round lasts three minutes with a one-minute rest between rounds. A boxing bout can be won by knockout, technical knockout (stoppage by the referee, doctor or corner), a decision on the judges’ scorecards, or disqualification for fouls. A draw occurs when the judges give both fighters equal scores. The market offers a price on each of those four main outcomes and on combinations — method of victory by stoppage, method by decision, fight to go the distance, total rounds over/under, and round groupings.

Sanctioning matters. The WBA, WBC, IBF and WBO sanction world championships in professional boxing. Each organisation keeps its own rankings, and a mandatory challenger is a fighter the title-holder is contracted to face next. Cards on UK operators typically carry prices for every bout, including non-title fights, with the depth of markets varying by event and operator. The bigger the bout, the longer the market list. A routine undercard may offer win / draw / no contest plus a couple of round props; a world title fight offers round groupings, method of victory in a given range, and a dozen bet-builder options.

Promoters vary their offering. Some operators post a line within hours of the fight announcement; others wait until weigh-in, when late injury information is more reliable. The punter’s job is to know which operator’s discipline fits which stage of the betting cycle, and that is one of the orders in which the operators below differ.

The ten UK-licensed bookmakers compared

The ten brands below all hold a Gambling Commission remote licence for Great Britain and appear on the Commission’s public register against an active account. They are not ranked by quality and not endorsed by this page. The role of this list is comparison: which operator fits which punter’s profile, by licence, market depth and terms.

Licence numbers above are the Commission’s account numbers, not the long-form reference; the full reference appears on the Commission’s public register against each business name. A punter who wants to verify should search by account number there.

What the licence actually buys a UK punter

Three protections come with holding a Gambling Commission remote licence, and they are not optional. Identity verification runs before the first deposit or bet — name, address and date of birth are checked, and that rule applies with a free bet or bonus, not only with a paid stake. GAMSTOP is the national multi-operator self-exclusion scheme; it is mandatory for online operators and any punter who registers for it is blocked from every GB-licensed site for the chosen period (six months, one year, five years, or five years with auto-renewal). Bonus rules capped wagering requirements on bonuses at 10x from 19 January 2026 and banned mixed-product promotions, so a welcome offer requiring a £10 bonus plus a £100 turnover is now the worst case, not the average.

Two checks sit further along the punter’s journey. A financial vulnerability check applies once a customer’s deposits minus withdrawals exceed £150 in a rolling 30 days; it is a public-record check (bankruptcy, county court judgments), not an income or credit check. A first round of deposit-limit changes applied on 31 October 2025, and a second phase was postponed to 30 September 2026; whether that second phase is live is not established. Financial risk assessments are announced in a staged plan with no start date — write “announced, staged, no start date”, not “in force”.

What no Commission licence does is promise the punter a winning bet. It promises a market that runs to its own rules, complaints that route to an approved dispute-resolution body, customer funds held in segregated accounts where the licence so requires, and advertising that follows the CAP and BCAP codes. That is more protection than an offshore site offers, and it is the entire case for staying licensed.

The legal frame, in UK terms

The Gambling Commission (UKGC), a non-departmental public body sponsored by the Department for Culture, Media and Sport, licenses the entire commercial market under the Gambling Act 2005. That Act covers Great Britain — England, Scotland and Wales; Northern Ireland is outside the Act and has its own older law. Since the Gambling (Licensing and Advertising) Act 2014, an operator whose remote facilities are used in Great Britain needs a Commission licence wherever it is based; a Curaçao, Maltese or Gibraltar licence is not a substitute for that requirement.

The Commission’s public register is the test of who holds a licence. It can be searched by business name, trading name, domain or account number, and the data is the whole evidence base. Operators use .com as well as .co.uk, and the domain proves nothing about the licence status. No single brand is “the only” licensed one; the register lists far more operators than any article can feature.

What the law does not do. It does not list permitted bets or markets; operators offer them under their own licence categories and the Licence Conditions and Codes of Practice (LCCP). It does not cap stakes on a customer’s behalf — operators set their own maximum stakes and may restrict individual customers. It does not block in-play betting, but each operator’s in-play offering is governed by licence conditions and customer-protection duties. It does not allow a tax on winnings; General Betting Duty is the operator’s tax on gross profits, currently 15%, and a remote betting rate of 25% applies within it from 1 April 2027, while remote bets on UK horse racing, pool betting and in-person betting stay at 15%.

Offshore sites do not need to be lawful to take a UK customer’s stake, but the punter who uses one loses access to GAMSTOP coverage, the Commission’s complaints route, an approved dispute-resolution body, and any practical redress if funds are withheld. The Commission enforces against operators by cease-and-desist notices, search-engine referrals and work with registrars, hosts and payment providers; court-order DNS blocking powers are being developed, but ISP blocking is not in operation today. Honest framing: licensed = checks, limits, GAMSTOP, bonus cap, but also identity verification before the first bet; unlicensed = none of those protections and possible loss of funds. Neither is “the safe choice” by default — that is a category the law does not recognise.

A short word on responsible gambling

The math in the previous sections runs in the punter’s favour only across very large samples. Over a single fight card or a season of bets, variance dominates. The skill a punter can build shows up in the average over hundreds of bets, not the result of any one wager.

That is the reason the operators above carry deposit-limit tools, time-out features and self-exclusion through GAMSTOP. It is also the reason the punter who notices their own behaviour change — chasing losses, betting money earmarked for bills, hiding bets from family — has recourse outside the betting app. GamCare runs the National Gambling Helpline. GambleAware funds treatment and research. NHS gambling clinics offer free specialist help across England. Gamblers Anonymous runs peer-support meetings. None of these resources depend on which bookmaker the punter uses; they sit with the punter, not the platform.

The 18+ age rule is the law, not the operator’s policy. Name, address and date of birth are verified before a deposit or a free bet, and that verification runs on every GB-licensed site.

Cryptocurrency, boxing and the licensing question

Search interest in paying for boxing bets with bitcoin, litecoin or bitcoin cash is real, and the question it raises is sharper than most punters realise. The first part is whether the bet itself can be placed from a UK-licensed bookmaker via crypto. No statutory prohibition on cryptocurrency deposits at licensed UK operators has been established; the position varies operator by operator and is set out in each site’s payment terms.

The more important part is what an offshore crypto-friendly sportsbook does not give the punter. No GAMSTOP coverage. No Commission complaints route. No approved dispute-resolution body. No segregation of customer funds. No 10x bonus cap, no £150 vulnerability check, no credit-card ban. A punter who trades those protections for an unregulated exchange is trading them for a price the market never advertises, and that trade rarely closes well.

The British named-account rule and the no-credit-card rule apply to GB-licensed sites and do not export. Identity verification before the first deposit means no anonymous play at a licensed site, which is also a fact a lot of searchers stumble over; cryptocurrency does not restore anonymity, it only moves the verification step elsewhere.

Bonuses, free bets, and the rules that govern them

The bonus language of UK sportsbooks reads like a sales brochure, and a few sentences of clear prose help more than a paragraph of marketing copy.

A “free bet” is a token the punter wagers with bookmaker funds, not their own, and whose stake is usually not paid back with a win. The token’s real value is in the odds the punter takes: a £10 free bet at 4.00 wins £30 of profit if the selection lands, and is worth roughly £10 × (odds − 1) / odds × market payout share as an average expectation. A “cash bonus” is a credit the punter’s account receives, usually matched to a deposit, which carries wagering requirements before the bonus funds withdraw as cash. A “price boost” is a one-off enhancement of a price the punter could otherwise take; the boost itself is not a free bet, and any winnings are usually paid back as a free bet rather than cash. “Best odds guaranteed” pays the bigger of the original price or the starting price on UK and Irish horse racing (not boxing), and is irrelevant to the boxing punter except as a marker of an operator’s overall terms. Accumulator insurance refunds a single stake as a free bet when one leg of an acca loses — useful in narrow form, costly if relied on as a strategy.

The promotion rules that govern all of these came in on 19 January 2026 and matter for the punter reading the small print. Wagering requirements on bonuses are capped at 10x, so a £10 bonus cannot demand more than £100 of qualifying bets; mixed-product promotions are banned, so a “bet on football to get free spins” cannot be advertised. The free bet the operator hands out, alongside the deposit bonus, is usually a separate credit under separate rules. Read the offer’s own page before claiming.

Mobile betting and the boxing card on a phone

Most UK boxing cards are settled on a phone, not a laptop. The ten operators above all carry a mobile presence; what they offer through it varies.

Three factors decide which app fits which punter. First, the in-play experience: how quickly the odds refresh when a fighter touches down, and how deep the in-play market list runs. Second, the bet builder on the same fight: whether method of victory, round groupings and total rounds all appear, or only the headline win market. Third, the cash-out depth: which markets are settleable mid-fight, and at what margin the cash-out price embeds.

The punter placing a single bet before the card starts needs none of that. The punter adjusting positions through a card needs all three, and that is the criterion that splits the listed brands. A punter who values watchability on the card needs a live-streaming offer; a punter who values fast settlement needs a one-tap cash out. Apps that bundle both are rare, and the punter’s job is to pick the one that bundles the must-have.

Live boxing betting and the in-play market

Live boxing betting means placing wagers on a fight after it has started, at prices the operator reissues as the rounds go on. The in-play market list is the same as the pre-fight list, scaled down: win market, method of victory, next-round finish, total rounds to date, and selected round-groupings. The punter who watches the rounds and lays bets in real time is doing two things at once: reading the action and judging whether the new price under- or over-represents the punter’s view of the fighter.

That job is harder than it looks. The bookmaker’s in-play margin tends to be higher than the pre-fight margin, partly because the algorithm updates faster than a human can type. A great punter at the pre-fight number becomes an average punter at the in-play number, and the edge that justified the bet can disappear in two rounds. The punter who watches a fight should also be willing not to bet on it, and that is a discipline UK operators do not advertise.

Cash out is the corollary: a punter who took 1.80 pre-fight and sees the favourite ahead on the cards can lock in roughly that price minus margin by cashing out. The cash-out number is the operator’s updated view, with its own margin. A punter who would not take the current cash-out price for the bet in the first place should not cash out.

Fitzdares: a premium spread of markets across the major sports

Fitzdares publishes a remote licence via Fitzdares Limited and runs the kind of app a punter opens when they want a deeper market list than the average bookmaker. Its own terms state cash out, accumulators, Lucky 15s, specials and antepost markets on horse racing, football, tennis, rugby, cricket, golf and American football, with in-play live odds — a list that immediately looks heavy on racing and football and lighter on combat sports. The boxing offer runs with the rest of the card; the punter looking for round-by-round props or method-of-victory groupings should check the betting slip before staking.

For a punter with a horse-racing habit who follows boxing as a second sport on the same app, Fitzdares fits. For a punter whose boxing is the main event, the market depth is on the thin side of the listed set, and one of the bookmakers below may serve that punter better.

Bet Ahoy: acca-focused with a substitution cover

Bet Ahoy holds a remote licence via Bet Ahoy Ltd. Its terms describe a 10% Acca Bonus up to £1,000, Sub-Cover for player substitutions, Best Odds Guaranteed on UK and Irish horse and greyhound racing up to £100, and Double Result payout on UK and Irish racing — a profile that points firmly at the football-and-racing punter. The substitute-cover feature is a football product. Boxing-specific markets sit inside the regular sportsbook, with the punter doing the depth-checking.

For an acca builder, Bet Ahoy has the kind of welcome offer its own terms describe. For the boxing-only punter, the spec is thin on the operator’s own listed boxing section, and that is the honest read.

Fafabet: best odds guaranteed on the racing, plain boxing elsewhere

Fafabet holds a remote licence via Taichi Tech Limited. Its published terms describe a Best Odds Guaranteed offer on UK and Irish horse racing win and each-way bets from 9am on race days — if the starting price is bigger, the bigger odds are paid. The boxing card carries the standard markets (win, draw, method of victory, total rounds), and the punter who bets on Fafabet for the racing and on another operator for the boxing fits the operator’s own shape. BOG does not apply to boxing; that note is worth filing up front.

For a racing-led punter, Fafabet’s terms describe a well-set offer. For a boxing-led punter, Fafabet’s own boxing terms are sparse, and the punter checks the card before staking.

Unibet: long-running operator with a clear responsible-gambling stack

Unibet states it has operated since 1999 and runs its UK site via Platinum Gaming Limited, Gibraltar, under account 45322. The site lists a sports welcome offer for new GB customers using a debit card or instant bank transfer, and a responsible-gambling stack that includes deposit limits, a Player Profile test, product restrictions and self-exclusion, with live chat support and links to BeGambleAware, GamCare, GAMSTOP, Gambling Therapy and the BGC. That responsible-gambling stack is the most thorough of the operators whose own terms are quoted on this page.

For a new UK punter who wants a single account with a clear safer-gambling toolkit, Unibet’s own terms describe that. For the punter who has already excluded themselves via GAMSTOP, the new-account route is closed and that is the protection working as designed.

Matchbook: the betting exchange in the comparison set

Matchbook holds a remote licence via Triplebet Limited, and also holds a remote betting intermediary licence — the category that covers betting exchanges. Customers bet against other users, with Bet Builder, multiples, in-play betting and live streaming of horse racing and greyhounds listed on the App Store entry. The exchange model differs from a sportsbook: prices are set by users, and Matchbook’s commission is the cut, not a margin built into the price. The acca insurance and bonus-heavy welcome offers that the rest of this page describes do not apply in the same form on an exchange.

For a punter who wants to lay fights (bet against a fighter winning) or trade positions during a fight, Matchbook’s own terms describe a working venue. For a punter who wants a free-bet welcome offer and a price boost menu, Matchbook is not the right fit.

BetUK: a sportsbook-and-casino bundle with exclusions to read

BetUK holds a remote licence via LeoVegas Gaming PLC — the same parent that runs several other UK sportsbooks. Its free bets exclude virtual sports, esports and non-UK/IE horse racing, and minimum odds apply. The exclusion list is the operative sentence for a punter choosing between BetUK and a competitor: a £10 free bet on a Champions League football match works; the same £10 on a virtual horse race does not. Boxing markets carry under the standard set, with the punter checking the card for depth.

For a punter whose betting pattern is pre-match football plus a Saturday card of boxing, BetUK’s own terms describe a working book. For a punter who bets heavily on esports or virtuals, the exclusions cost them — at least in free-bet currency.

Midnite: acca builder and price boosts on a tight offer

Midnite holds a remote licence via Midnite Limited. The site shows in-play events, an acca builder, popular accas and price boosts with maximum-stake limits — a stack that suits the acca-first punter. The listed free-bet offer is the small-stake variety (£5 or more at minimum odds EVS / 2.0 within 14 days of sign-up; £25 in free bets plus 50 free spins), valid 7 days. The structure suits a punter testing the platform without committing a large bonus bankroll.

For a casual acca builder, Midnite’s own terms describe an offer worth a careful look. For a punter chasing the largest single bonus, the headline figure is modest.

Lottoland: lottery, casino, sports and scratchcards in one app

Lottoland holds a remote licence via EU Lotto Limited. The app combines casino, lottery betting, sports betting and scratchcards and states it is licensed by the Gambling Commission for customers in Great Britain. The boxing offer sits inside the sportsbook. For a punter who already bets on EuroMillions or instant-win games on Lottoland and wants to add a Saturday fight card without opening a second book, Lottoland is the same-account route.

For a punter whose main interest is in-depth boxing markets, Lottoland’s primary business is lottery, and the boxing offering is secondary in product terms. Read the card before staking.

VBet: bet builder, live calendar and live streaming

VBet holds a remote licence via SCGO Limited. The app offers Bet Builder, pre-match and in-play betting, live streaming and a live calendar with results and stats — a feature stack that runs broad. The boxing-specific depth is not enumerated in the operator’s own listed terms; the punter who wants round groupings and method-of-victory bets should check the betting slip.

For a punter who values live streaming and the live calendar, VBet’s own terms describe a working offer. For a punter whose priority is the depth of the boxing market itself, the depth is on the punter to verify in the app.

Dabble: a small welcome offer and short free-bet window

Dabble holds a remote licence via Dabble Sports UK Ltd. The welcome offer is “Bet £10, Get £10 in Free Bets” on a first deposit for new customers, with minimum odds applying, a 7-day free bet expiry and the stake not returned. The small-stakes structure suits a punter trying the platform before committing more; the 7-day expiry is a narrow window that needs watching.

For a casual punter testing a new book on a small bankroll, Dabble’s own terms describe a working offer. For a punter with a long account-opening checklist, the 7-day clock is the binding constraint.

Frequently asked questions

How to bet on boxing?

Place a single bet on the win market (Fighter A to win, draw, draw no bet, or method of victory) at one of the GB-licensed bookmakers above, then check the betting slip for the price. The decimal odds quoted show the total return per £1 staked; the margin sits inside that price and is the bookmaker’s cut of every pound wagered.

How does boxing betting work in the UK?

Every GB-licensed bookmaker on the Commission’s public register must verify your identity before the first deposit, accept GAMSTOP self-exclusion, and follow the 10x bonus cap and £150 financial vulnerability check from the dates the rules came into force. You place a bet on the price shown, the operator settles from official result, and winnings are paid into your account without tax withheld.

How to bet on boxing online?

Open an account with one of the operators above, complete identity verification, deposit with a debit card or bank transfer (credit cards are banned for gambling in Great Britain), and select the bout and market. Stakes are confirmed in the slip and settled at fight end.

What is a value bet and why is no tip ever certain?

A value bet is a price that underestimates the fighter’s true probability once the bookmaker’s margin is taken out, so the punter’s estimate exceeds the implied probability of the odds. No tip is certain because the bookmaker’s price is the market’s settled view and the tipster’s edge is unverifiable in advance.

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

The margin is the cut the bookmaker keeps from every unit wagered, calculated as 1 − payout share, where payout share is 1 divided by the sum of the reciprocals of all decimal odds for the market. Worked at 1.90 / 1.90, the reciprocal sum is 1.0526, payout share 95.0%, margin 5.0%; at 1.40 / 3.00 the margin drops to 4.55%.

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

The total return equals stake × decimal odds, and the net profit equals stake × (odds − 1) for a single bet. For a combination bet the odds of the legs multiply into one price, so a £10 stake on three legs at 1.60, 1.80 and 2.00 prices up to 5.76 and returns £57.60 if all three land.

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