The minimum payment amount is $5. The maximum amount you're allowed to send is listed next to the Amount field within Popmoney. This amount is reduced each time you send a payment and then reset on a rolling seven day period. For example, if your maximum amount is $1,000 and you send $100 to someone, your maximum amount changes to $900 for the day. When your maximum amount reaches $0, you cannot send money until it resets. Note: Next day payments to other Popmoney users are limited to $500 per day.