While no deposits slots and games featuring a slots bonus are similar, there is a distinction. While most slot bonuses require a player to make a minimum deposit, a no deposit slots bonus is typically awarded to players who sign up to an online casino site for the first time. When you receive a no deposit slots bonus, that means that you are instantly rewarded with a balance, without having to make an initial deposit. No deposit bonuses allow you to test out an online casino before spending any of your own money.