About BonusWijs
BonusWijs.nl is an independent information platform that makes the mathematics behind Dutch casino welcome bonuses transparent. No hype, no empty promises — just the numbers.
Why BonusWijs?
Casinos advertise with "100% up to €250!" and "400 free spins!" — but what is that really worth after the wagering requirements? We answer that question with mathematics. We calculate the expected value (EV) of every welcome bonus based on the official bonus terms, so you get a fair picture before making a deposit.
Our approach
Every bonus is manually checked against the official terms on the casino website. We use a mathematical model that accounts for match percentage, wagering requirements, game weighting, RTP and cashout limits. The full methodology is public and explained in plain language.
All bonus data is checked regularly. When terms change, we update the calculations. Each casino page shows when the data was last verified.
Independence
BonusWijs does not offer gambling services and does not receive compensation from casinos for positive reviews. The EV calculation is the same regardless of whether the result is positive or negative. If a bonus is bad, we say so — including a warning on the page.
Who is it for?
BonusWijs is intended for adults (24+) who are considering using a welcome bonus and want to understand its mathematical value. We do not encourage anyone to gamble. The mathematics actually show that the casino always wins in the long run — and that most bonuses cost money.