ICANN (the Internet Corporation for Assigned Names and Numbers) charges a mandatory annual fee of $0.18 for each year of domain registration, renewal or transfer. For example, the fee for a one-year .com domain registration will be $0.18 while it is $0.36 for a two-year .com domain registration.
This will be added to the listed price for some domains at the time of purchase. Check the list of these domains here.
If you have any questions, feel free to contact our Support Team.