A casino bonus is a marketing instrument. It's not a gift and not a gesture of goodwill: behind every «100% up to €500» is math that almost always favours the operator. Understanding that math is the only way to judge whether an offer is worth accepting — or whether it's just a hook to pull you into a deeper session.
This guide covers every common bonus type, explains wagering with concrete numbers, exposes the T&C clauses that eat winnings most often, and gives the legal context for MGA and UKGC-licensed operators — the framework most reputable EU/UK-facing bonuses live under. When our first partner listings go live, this same page will show them with the honesty they deserve.
What a casino bonus is — and why the casino offers it
A casino bonus is virtual funds or free spins credited to a bonus balance, gated by a condition: before those funds convert into withdrawable real money, you must complete a wagering requirement. From the casino's side, it's a discounted customer-acquisition cost — €100 of bonus that a player wagers €3,500 in slots with a 96% RTP produces roughly €140 of guaranteed gross gaming revenue.
This is why «generous» bonus is a misnomer. The generosity is capped by wagering, max bet during rollover, time limit, and the list of contributing games. Our job as players is to judge whether accepting the offer beats simply depositing without it and playing freely.
The main bonus types
Welcome bonus
The most common format: a match bonus on the first (sometimes 2-3) deposit. «100% up to €500» means the casino doubles your deposit up to €500. Deposit €100 and you get €200 (€100 real + €100 bonus). 90% of welcome bonuses require wagering only on the bonus part; 10% require it on the combined balance (real + bonus) — the second is significantly worse and almost always hidden in the fine print.
No deposit bonus
The operator credits a small amount (€5–€25) or 10–50 free spins with no deposit required, just for registering. Looks like «free money», but wagering is always aggressive (x40–x70), max withdrawal capped at €50–€100, and almost always a first-deposit requirement before you can cash out. Real EV of no deposit offers is close to zero, but as a way to test a platform without your own funds — acceptable.
Free spins
Free rounds on a specific slot (usually Starburst, Book of Dead, Big Bass Bonanza). Winnings go to the bonus balance and are subject to wagering. Look carefully at the «spin value» — that's the stake per spin: €0.10 × 50 spins = €5 of expected value at normal RTP. Not a shot at a jackpot; a small balance booster.
Reload bonus
A match bonus for existing players on the 2nd, 3rd and subsequent deposits. Something like «50% up to €200 every Friday». Usually smaller and with better wagering than welcome. Good fit for regular players who deposit weekly or fortnightly.
Cashback
A return of a portion of losses over a period (week, month): 5–20% of net loss credited back. Cashback comes in two flavours: sticky (with wagering, like a regular bonus) and real (no wagering, immediately withdrawable). We cover the difference in [our blog's bonus section](/blog/category/bonusy). Real cashback is one of the few bonuses with genuinely positive EV for the player.
VIP and loyalty programmes
A long-term system: every €10 wagered accrues loyalty points, later redeemable for bonus funds or free spins. VIP status brings faster withdrawals, a personal manager, higher limits. Uneconomic for casual players (need to wager thousands to earn a modest cashback) but a legitimate way to shave down house edge for regulars.
Wagering: the main trap
Wagering requirement (WR) is a multiplier: how many times you must play the bonus amount through in bets before winnings become withdrawable. Formula: total bets required = bonus × WR. €100 bonus with x35 WR = €100 × 35 = €3,500 in total bets across eligible slots.
Economically: the average slot has 96% RTP, meaning €3,500 in bets returns €3,360 (expected loss ~€140). To unlock €100 of bonus you statistically lose €140. That's the math of why «free» bonuses aren't free.
How to read T&Cs: 6 clauses that eat winnings
Bonus terms are a multi-page document in fine print. Not going to read all of it, but six points are worth checking before activation:
- Max bet during wagering. Standard is €5 per spin, sometimes €2. Bet higher and the casino has the right to void the bonus and its winnings. This is the single most common reason payouts get refused.
- Game restrictions. Slots contribute 100%, roulette 10–20%, blackjack often 5% or entirely excluded. Don't try to wager down a bonus on table games — you'll burn hours without moving the requirement.
- Max cashout from the bonus. No deposit bonuses and free spins often cap at €50–€100 regardless of how much you win. Won €500? Withdraw €100; the casino keeps the difference.
- Time limit. Usually 7–30 days to complete the wager. Don't finish in time — bonus and any winnings from it are wiped.
- Country restrictions. Some bonuses exclude certain jurisdictions. UK IPs are excluded from many aggressive offers post-UKGC rule changes; other markets vary.
- Contribution rates by slot. Some popular slots (like Book of Dead) are excluded or contribute 20% instead of 100%. Playing them doesn't move wagering.
MGA vs UKGC vs Curaçao — the licence that actually protects you
The bonus is only as trustworthy as the licence the casino holds. MGA (Malta) and UKGC (UK) are the tier-1 regulators for EU-facing operations: strict wagering caps, mandatory RG tools, complaint procedures with actual enforcement teeth. Gibraltar GRA is a solid alternative. GGL (Germany) is a walled garden for the German market only.
Curaçao-only licences (without a parallel MGA/UKGC) sit in a grey zone. Legally not banned in most EU markets, but if the operator fails to pay out you have effectively no recourse. We recommend against Curaçao-only operators regardless of how attractive the bonus looks — the risk of non-payment outweighs the offer.
Common questions about casino bonuses
Can you actually withdraw winnings from a no deposit bonus?
Technically yes — after clearing wagering, no deposit bonus winnings convert to withdrawable cash. Practically the numbers are against the player: average EV of a no deposit offer is +€1 to +€5 after completing all conditions, and in ~80% of cases the player loses the bonus before hitting the WR. It's not an income stream; it's a way to try out a platform with none of your own money at risk.
What if the bonus disappears from my account before wagering finishes?
The most frequent causes: (1) the time limit expired, (2) you placed a bet above the max-bet-during-wagering cap, (3) you activated a second bonus before finishing the first. Contact live chat with the activation timestamp, a screenshot of the terms, and the bet history. At licensed operators (MGA/UKGC) they are obliged to justify the revocation with reference to a specific T&C clause.
What counts as a fair wagering requirement in 2026?
For a welcome bonus, x30–x35 on the bonus part is the industry standard among licensed operators. x40+ is aggressive and needs cross-checking against other terms (contribution rates, max bet). Anything above x50 is a marketing hook, typical of Curaçao-only operators. WR above x60 practically guarantees the bonus will never be cleared.