Start with the qualifying deposit and the bonus cap
At duffspin casino, the bonus terms page is the document that controls the offer, not the promotional headline. The qualifying deposit sets both the bonus amount and the maximum cashout. A 100% match capped at £100 is not worth £200 because a later deposit is larger; only the first £100 deposit generates bonus funds.
- Check: minimum deposit, maximum bonus, and whether the cap applies per offer or per account.
- Result: a deposit at or below the cap avoids locking extra cash into a capped reward.
Read the wagering contribution table
Wagering requirements are rarely one flat number across all games. Slots usually contribute 100% toward turnover, while table games and live casino titles often contribute less or nothing. If the terms require 35x the bonus, a £50 bonus creates £1,750 of wagering before any withdrawal, and a 20% contribution game would require £8,750 of bets to clear the same requirement. The contribution table matters more than the headline multiplier because it changes the effective cost of clearing the bonus.
- Check: the base multiplier and the contribution percentage for each game type.
- Result: the cheapest clearing route may be a low-stakes slot, not the game with the highest return.
Confirm expiry, maximum bet, and game restrictions
Time limits turn a bonus into a deadline-driven task. A seven-day window is not the same as a thirty-day window if the required turnover is high. Maximum bet rules also matter: a £5 cap during bonus play can void winnings if a single spin exceeds it, even when the underlying game result is valid. If a bonus code is required and omitted, support may refuse retroactive application.
- Check: expiry date and time, maximum stake per spin or hand, excluded games, and any required bonus code.
- Result: a written plan for stake size and session length prevents accidental rule breaches.
Test the withdrawal cap before opting in
The most expensive term is often the cashout ceiling. A bonus may permit a £500 withdrawal from a £2,000 balance, with the remainder removed. That changes the effective value of the offer far more than a small difference in the headline percentage.
- Check: maximum withdrawal from bonus winnings, whether the cap is weekly or per bonus, and the withdrawal method rules.
- Result: an offer that looks generous at 200% can be worth less than a 50% offer with no winnings cap.
Turn the terms into a single effective value
A quick calculation combines cap, wagering, and cashout ceiling. If the bonus is £50, the cashout cap is £250, and the wagering is £1,750, the offer is not £50 of cash value; it is a ticket to a capped outcome. The comparison should use the maximum withdrawal and the expected clearing time, not the bonus amount alone.