This is only topped by their welcome bonus which not only matches sums on 4 different deposits, but even a hefty 250 spins to play on a pre-selected slot machine. Their casino sign up bonus gives all players 50 free spins immediately after registering a new account. The best casino sign up bonus we found in NZ is definitely King Billy. Casimba casino welcome bonus is 200% up to $5,000 with 50 free spins and King Billy players get 50 no deposit spins and 250 free spins. Players can also get certain free spins from some casinos. In total, you have $30 to play your favourite casino games. For example, if you get a 200% matched bonus on a $10 deposit, you get $20 extra. There are also offers that give you anything between 200% to 500% match on your money. The most common casino bonus is a 100% match on your deposit. When you sign up and deposit any amount from $10 to $3000, NZ online casinos will give you a sign-up bonus, so you have more money to play with. 🎁 Best Welcome Bonuses Online Casinos NZĪ casino bonus is an extra money offer you receive when you deposit to an online casino. 📝 Terms & Conditions Applied on a Bonus.📝 How We Review the Welcome Bonuses of NZ Gambling Sites.🔎 How to Pick Your Casino Welcome Bonus.🎖️ Best Casino Bonuses in New Zealand Explained.🎁 Best Welcome Bonuses Online Casinos NZ.