This article describes how the internet has come to play a central role in terrorist financing endeavours. Online channels allow terrorist financiers to network with like-minded individuals, in order to increase support, raise funds, and move wealth across the international system. For instance, the Islamic State, Hezbollah, and other groups have become adept at using these channels to finance their activities. Therefore, increased examination is required of the ways in which terrorists use the internet to raise and move funds. This study assesses some of the current trends and risks associated with online terrorist financing. Some policy options are also outlined, in order to reduce the threat of terrorist financing via the internet moving into the future.