There are no additional charges from Chat To Text beyond the monthly fee. However, your cell phone provider will have standard set rates depending on the service plan you are signed up for. Please check your rate plan with your service provider for text messaging prices. Some providers offer unlimited text messaging packages for a set fee. Please note that every incoming message sent from Chat To Text to your cell phone counts as one individual text message, and every outgoing text message from your phone in reply to the Chat To Text message is also a individual text message.