It depends on the specific terms and conditions of the online gambling site you are using. Generally, most online gambling sites require the player to meet the rollover requirements before they can withdraw any winnings. This is to prevent people from depositing money just to claim a bonus and then withdrawing it without actually gambling with the funds. However, there may be some exceptions or special circumstances that allow for early withdrawal of winnings, so it is important to carefully read the terms and conditions or contact customer support for clarification.