Trey offers several plans for web accounts, but most businesses only need the plan B account shown on the domain plans page. You can find out much more detail by examing the domian help pages. Some information there you won't understand until you have your account activated and you can look around. For example, this control panel sample . All fees must be paid in advance.
Service is contracted and paid in advance, three month contracts or more preferred.
Any additional charges, such as additonal transfers above that included, will be billed in arrears.