User Interface is an important component of every computing system. This is particularly true in Internet Banking, where the users are customers, who access the banking services online, from different locations of the world. These customers when dissatisfied with the banking services could take drastic actions, such as spreading service failure related rumours, withdrawal of patronage, and so on. Since customers access Internet Banking services through the user interfaces via the websites, it means that such interface designs should follow best practices and highest standards. Though no singular Internet Banking System may be termed as superior over the rest of the others in the world, it is necessary that system designers should be contemporary, innovative and customer-centric. One way to achieve this is by studying what is obtainable in the industry with the view of improving on the existing expertise. This work is a computational analysis of the current trends in Internet Banking user interface designs, with cases studies drawn from some selected Nigerian banks. Some of the outcomes of this research are the User Interface Functionality (UIFA) Chart, and the User Interface Similarity Analysis (UISA) Chart.