What is bonus abuse?

What is bonus abuse? A plain answer

Bonus abuse is casino shorthand for using a promotion in a way its terms don't allow. Typical examples are one person opening several accounts to claim a welcome offer more than once, staking above the bonus maximum bet, or playing a pattern the terms specifically prohibit.

You won't find the phrase in UK regulation. The Gambling Commission's guidance on promotional play restrictions (opens in a new tab) instead talks about prohibited types or patterns of play and about 'irregular' play. The key point for players is that what counts as prohibited is set by each casino's terms, and those terms must spell it out clearly beforehand.

Most people who get caught out aren't trying to game anything. They miss a line in the bonus terms, place one bet over the limit, or play a game that doesn't count. That's why reading the significant terms before opting in matters more than anything else on this page. Browse more answers in our casino questions section.

What counts as bonus abuse in UK casino terms

Each casino writes its own list, but the same categories come up again and again. The Commission names some of them itself: terms about illegal, irregular or fraudulent play, multiple accounts, and third-party use or funding of accounts.

Two of these deserve a closer look. Our pages on the max bet rule and on what happens if you break the max bet rule cover stake limits in detail, and our guide to payment method exclusions explains why some e-wallets and prepaid cards don't qualify.

Why casinos restrict bonus play: the maths

A bonus is priced on the assumption that you'll play normally, with the house edge working on every bet you place while you clear the wagering. Covering both red and black on a single-zero wheel shows why some patterns are banned.

Put £10 on red and £10 on black. On 36 of the 37 pockets one bet wins £10 and the other loses £10, so you break even. When zero lands, which happens 1 time in 37, you lose both, so £20. The average loss is £20 × 1/37, about 54p a spin, which is exactly 2.70% of the £20 staked. The cost doesn't disappear; the pattern just turns over a lot of wagering with very little swing, which is why terms ban it. It's not a clever move, and doing it risks the whole bonus.

The same logic explains limits on game choice. Lower-edge table games count for less or nothing at many casinos, which our game weighting page explains, and our guide to red or black bets covers the odds of the even-money bets.

UK rules on bonus abuse terms: what casinos must and mustn't do

Casinos can enforce sensible rules, but the Commission and consumer law put firm limits on how. Its guidance says terms must clearly specify all prohibited types or patterns of play, and that operators must not ban a form of play that wasn't set out in advance.

• No sole discretion: a casino can't keep the right to decide for itself, after the fact, what play breaks the rules. The Commission's guidance on terms giving undue discretion (opens in a new tab) says such terms would be unfair under the Consumer Rights Act 2015.
• Say what will happen: wording that the operator 'may' or 'reserves the right' to void winnings is discouraged, because customers are entitled to know what action will be taken.
• Explain any forfeiture: if winnings are removed, you must get a full explanation of which restriction you broke.
• Ambiguity favours you: under the Consumer Rights Act, where a term could mean different things, the meaning most favourable to the consumer wins.
• Your deposit stays yours: you can withdraw your deposit balance at any time, even while a bonus is active.

These rules have teeth. In July 2025 the Commission fined Taichi Tech (Fafabet) £170,000, partly over a term that let it close accounts or forfeit winnings at its discretion; the Commission's notice on the Taichi Tech fine (opens in a new tab) sets out the case. Our overview of UK casino bonus rules covers the wider framework.

Worked example: how one oversized bet can cost a £100 bonus

Take a 50% matched bonus up to £100 with 10x wagering and a £5 maximum bet, like the Casumo offer described at the foot of this page. Deposit £200 and you get £100 of bonus funds, so you need £100 × 10 = £1,000 of bets to release it. At £5 a spin that's at least 200 spins.

On a slot returning 96.09%, such as Starburst, the expected cost of £1,000 of wagering is £1,000 × 3.91% = £39.10. So the bonus is worth about £100 − £39.10 = £60.90 on average if you finish the wagering, though any single attempt can land far above or below that. One £10 spin, double the limit, can wipe out the bonus and anything won with it under typical terms. The breach gains nothing and risks the full £100.

Our wagering calculator runs the same sums for any offer, and the guide to wagering requirements explains each part.

Multiple accounts and sister sites

The most common serious accusation is holding more than one account to claim the same new-customer offer. One account per person is the norm at UK casinos, and identity checks on name, address and date of birth make duplicates easy to spot.

Brands that share an owner may treat you as one customer. Coral and Ladbrokes are both run by LC International Limited, part of Entain, so one person may not be able to hold new-customer accounts at both. Our answer on whether you can have accounts at several casinos explains how this works across different operators.

What to do if a casino says you abused a bonus

Stay calm and get everything in writing. A casino that removes winnings has to explain the breach, and you're entitled to see the exact term it relied on.

1. Ask support for a written explanation naming the specific term and the bets it says broke it.
2. Find that term in the version of the promotion terms that applied when you opted in, and screenshot it.
3. Check your deposit balance: it should still be withdrawable, whatever happens to the bonus.
4. If you disagree, raise a formal complaint using the casino's published complaints procedure.
5. If it isn't resolved within 8 weeks, ask for referral to the casino's ADR provider, such as IBAS. ADR is free for you.

Bonus disputes are a familiar category for ADR services. In the Commission's 2019-20 figures, disputes over bonus or promotional offer terms made up 8.2% of cases handled by IBAS. Our casino complaints guide and our explainer on complaints and ADR take you through the process.

Bonus abuse myths and the facts

The best protection is simple: read the significant terms, play eligible games at stakes inside the limit, and treat any bonus as extra play time rather than a source of profit. Our list of common bonus mistakes covers the slip-ups that most often lead to a bonus being removed.

Bonus terms at our partner casinos

Each of these offers has its own rules, and breaking them is what casinos mean by bonus abuse. 18+ and terms apply to all three. Table and live games are often excluded from bonus play or count for less, so check the terms before you opt in.

Casumo (Recro Limited, UKGC account 61549): new customers who opt in can get a 50% bonus up to £100 on a first deposit of at least £20. The bonus must be wagered 10x within 7 days, bets are capped at £5 while it's active, and game, play and payment restrictions apply. Our Casumo review covers the full terms.

10bet (Blue Star Planet Limited, account 43173): new UK customers who pick the casino welcome bonus at sign-up and deposit within 7 days receive a 100% match up to £25. Wagering is 10x on slots within 3 days, bonus winnings are capped at £1,000, and Skrill or Neteller deposits don't qualify. See our 10bet review.

Coral (LC International Limited, account 54743): between 1 October 2026 and 1 February 2027, new players who deposit and bet £10 or more on slots get 100 free spins at 10p each on selected games, to accept within 48 hours and use within 7 days, with no wagering on winnings. Neteller, PayPal, Paysafe, Skrill, prepaid cards and certain debit cards don't qualify. More in our Coral review.

18+. Every casino game has a built-in house edge, so over time you should expect to lose what you stake. Set a budget before you play and stop when it’s gone: safer gambling tools and support. Free, confidential help: National Gambling Helpline 0808 8020 133.