What Are Casino Bonuses?
Casino bonuses are promotional offers from online casinos designed to attract new players or reward existing ones. They come in several forms: deposit matches (the casino matches a percentage of your deposit), free spins (a set number of slot spins at no cost), cashback (a percentage of your losses returned), and reload bonuses (similar to deposit matches but for existing players). While these offers sound generous, the devil is always in the details — specifically, the wagering requirements.
Understanding Wagering Requirements
A wagering requirement is the number of times you must bet the bonus amount before you can withdraw any winnings. For example, a $100 bonus with 40x wagering means you need to place $4,000 in total bets. At a typical 96% slot RTP (Return to Player), the house takes 4% of every dollar wagered. On $4,000 in wagers, you'd statistically lose $160 to the house edge — making that $100 bonus worth -$60 in expected value. This is why lower wagering requirements are dramatically better: a 10x wagering on $100 means only $1,000 in wagers, losing just $40, giving you +$60 expected value.
Rule of thumb: Any bonus with under 20x wagering is worth a close look. Over 40x is almost always negative EV.
What Is Expected Value (EV)?
Expected Value is the mathematical average of what you'll gain or lose from a bonus over many attempts. It's calculated as: Bonus Amount minus (Total Wagering x House Edge). A positive EV (+EV) bonus means you're statistically likely to come out ahead. A negative EV (-EV) bonus means the house edge will eat more than the bonus gives you. Casino Signal calculates this for every bonus automatically, so you don't have to do the math yourself.
Types of Crypto Casino Bonuses
Deposit bonuses match a percentage of your deposit (e.g., 100% up to $500). Free spins give you a set number of slot spins, often with winnings subject to their own wagering. Cashback returns a percentage of net losses over a period. Rakeback returns a percentage of the house edge on every bet, regardless of winning or losing. Reload bonuses are deposit matches for returning players, usually with lower percentages but sometimes better wagering terms. No-deposit bonuses are the rarest — free money with no deposit required, but usually with very high wagering.
How to Use Casino Signal
Start on the Bonuses page where every offer is sorted by Signal Score — our 0-100 rating based on real expected value. Use the +EV filter to show only bonuses where the math is in your favor. Click any bonus to see the full breakdown: how much you'd get, how much you'd need to wager, and what the expected house take is. Use the EV Calculator to see exact numbers for your specific deposit amount. Check the Calendar for recurring deals, and the Welcome Tour for the best sign-up order across all casinos.