One spin above the limit can wipe out everything you won. Here is how the rule works, and why a vague version of it may not be enforceable.
Most bonuses cap the amount you can stake per spin or per hand while wagering is still outstanding. Five euro is common. Go over it once, even by accident, even on one spin out of a thousand, and most operators reserve the right to void the bonus and everything won with it.
It is the single most punishing clause in online gambling, because the penalty has no relationship to the breach. A player who staked six euro instead of five on one spin can lose a five figure balance built over hours of compliant play.
If it has happened to you, the question is not whether you broke the rule. It is whether the term the operator is relying on is one they are allowed to enforce.
This is the part almost nobody tells players.
The Gambling Commission's own guidance on fair terms says that a term giving a licensee discretion to decide when and how it is applied is unfair under the Consumer Rights Act 2015, because it creates a significant imbalance between the parties. Its stated example of what not to do is a term saying the operator "may" or "reserves the right" to void or withhold winnings.
An unfair term under that Act is unenforceable against a consumer.
The Commission has enforced this. In one case it fined an operator 170,000 pounds after finding bonus terms stating the company had the right at its own discretion to close accounts or forfeit winnings. It concluded the term lacked transparency and breached the fair and open licence condition.
Back in 2017 the Commission and the Competition and Markets Authority specifically named maximum bet size restrictions as promotional play restrictions that are often not set out clearly, reserve excessive discretion to the operator, and can lead to confiscation of deposits and winnings.
This is not legal advice, and it is not a guarantee you will win. It is the argument that has the most weight behind it.
| Situation | Operator position | Where you stand | Next step |
|---|---|---|---|
| Single accidental spin over the cap | Bonus and winnings void | Strongest challenge, penalty is wildly out of proportion | Demand the clause in writing, then escalate |
| Bonus buy counted at full price | Bonus and winnings void | Turns on whether the terms said so clearly | Check the wording and prominence |
| Repeated deliberate large stakes | Bonus and winnings void | Weakest challenge | Usually upheld |
| Term worded as sole discretion | Operator relies on discretion | The Commission's guidance says this is unfair under the Consumer Rights Act | Quote the guidance in your complaint |
Unfair terms are unenforceable against a consumer under the Consumer Rights Act 2015. Whether a specific term is unfair is decided case by case.
Most terms say they can. Whether that term is enforceable is a separate question. The Gambling Commission's guidance says terms giving the operator sole discretion over voiding winnings are unfair under the Consumer Rights Act, and unfair terms cannot be enforced against a consumer.
Usually yes, and that is how most players breach the cap without realising. Check the bonus terms before buying a feature while wagering is outstanding.
It is worth raising. An operator whose system permitted a stake above its own cap, without warning or blocking it, is in a weaker position than one that prevented it.
Verified against 3 primary sources. Last reviewed September 10, 2026.