How casino bonuses really work (wagering, free spins & traps)
A realistic breakdown of deposit matches, free spins, cashback and the terms that decide whether a bonus is worth claiming.
Bonuses are marketing — terms decide the value
A “100% up to €500 + 200 free spins” headline is incomplete until you know the wagering, eligible games, max bet, expiry and max cashout. Two identical headlines can have completely different expected value.
The core maths (simplified)
If you deposit €100 on a 100% match with 35x wagering on deposit + bonus, you must wager roughly €7,000 before withdrawing bonus-related funds. That is not impossible — but it is not “free money” either.
Free spins: look past the count
- Which slot? Volatility and RTP matter
- What is the spin value (€0.10 vs €0.20)?
- Are winnings subject to extra wagering?
- Is there a cap on convertible winnings?
Common traps
- Max bet while bonus is active (often €5) — exceeding it can void winnings
- Excluded games (live tables, jackpots, some slots)
- Country-restricted promos advertised globally
- Sticky bonuses that never convert cleanly
A practical claiming checklist
- Read wagering base (bonus only vs deposit+bonus)
- Confirm your country is eligible
- Check expiry (72 hours is tight; 30 days is more usable)
- Set a deposit limit before opting in
- Skip the offer if you cannot finish the playthrough comfortably
Bottom line
Use bonuses as a cost reducer, not a profit plan. The best offer is often the clearest one — not the largest percentage on the homepage.