CURRENT EDITION
UK guide · Maths & worked examples
Game contribution and qualifying turnover
Contribution rates describe how a wager is credited to a promotional progress counter. They do not describe the chance of winning, the amount returned or whether a game is suitable to play.
- Convert percentages carefully
- Separate rules from mathematics
- Check updates and records
Convert percentages carefully
At 100% contribution, a £1 eligible wager adds £1 to the counter. At 20%, it adds 20p. At zero, it adds nothing. A game can be technically available while being excluded from the promotion, so availability alone does not demonstrate eligibility.
Separate rules from mathematics
Dividing a target by a contribution percentage produces a theoretical turnover figure. That calculation is not advice to play through it. Funds can run out before completion, and a low contribution can make an apparently modest target require much more activity. Current GB incentive requirements must still satisfy the applicable UKGC rules.
Check updates and records
Save the eligible-game list attached to the offer when accepted. If progress differs from the stated rate, capture the game name, wager identifiers and counter values. Do not keep placing bets to diagnose the discrepancy. Support should be able to reconcile already recorded transactions.
| Hypothetical stake | Contribution | Counter credit |
|---|---|---|
| £2 | 100% | £2 |
| £2 | 20% | £0.40 |
| £2 | 0% | £0 |
Use contribution as an accounting question
The eligible-game list should answer both whether a game is allowed and how its wagers contribute. A zero-contribution game and a prohibited game are not necessarily the same category, so do not treat those labels as interchangeable. Similarly, a game family may contain different variants with different promotional treatment. Record the exact title and version shown in the transaction history. When asking support about progress, provide the relevant stake and the expected credited amount under the stated percentage. This gives a concrete discrepancy to investigate. A theoretical turnover calculation becomes meaningless if the promotion uses a different rule, and a larger arithmetic total should never become a reason to extend play beyond your original intentions.
- Check the exact game title against the applicable promotion list rather than relying on a broad slots or tables label.
- Distinguish allowed with zero contribution from prohibited while using bonus funds; ask if the terms blur those concepts.
- Keep the calculation educational and stop if the required activity conflicts with your time or money boundaries.
Worked example · hypothetical
Why the percentage matters
A £10 qualifying-turnover shortfall with a hypothetical 20% contribution corresponds arithmetically to £50 of eligible stakes: £10 divided by 0.20. It does not mean a £50 deposit is required or that £50 of stakes will be affordable or achievable.
- Identify the amounts and conditions actually stated.
- Keep deposit money, promotional credit and outcomes separate.
- If the information does not reconcile, pause and request an explanation.
Explore the arithmetic with the wagering calculator →
Common questions
Does 100% contribution mean 100% return?
No. Contribution is promotional accounting. Return concerns game outcomes. The matching percentage symbols describe unrelated quantities.
Is the example a current casino offer?
No. It is an invented teaching example. No operator is recommended and no result is promised. Check current terms and the relevant jurisdiction before relying on any real advertisement.
Sources & further reading
Read the source alongside the explanation. Rules and published terms can change; check the current official position where you live.
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