What does it cost to sign up with mMoney? Rupert@Bitt July 18, 2018 17:43 Updated Follow Nothing! Sign up is absolutely free. There is no minimum top-up either. You can top up with any amount you want to. Related articles How do I top-up or cash out with my mMoney wallet? What are my limits on mMoney? How do I sign up for mMoney? Comments 0 comments Article is closed for comments.