You have seven days to complete the bonus wagering, while the free spins are valid for three days. Once you’ve wagered the minimum amount of your tier, which is £10, 35x up to £350, you’ll get another £10 in bonus cash. So let’s say you deposit £20, then you will instantly get 10 free spins worth 10p each and eligible on Big Bass Splash, which applies to all free spins. Deposit £100 or more: Get 50 free spins and £100 cash reward.Deposit between £50 and £99.99: Get 25 free spins and £50 cash reward.Deposit between £10 and £49.99: Get 10 free spins and £10 cash reward.The welcome bonus works in deposit tiers, with the following rewards available: However, while you’ll receive the free spins instantly, the cash reward is only unlocked once you wager the tier’s minimum wager amount 35x. You’ll get wager-free free spins and a cash reward with each tier. After you open your account, you must make your first deposit of at least £10 on the My Offers page and select the option “Casino welcome bonus” when depositing. The casino welcome bonus at BetMGM UK will drop a bundle of free spins in your lap, depending on what you deposit.