The introduction of electronic banking has revolutionised the financial and banking industry, with an increase in the flow of finances and capital remotely and also serve as a strategic move for firms to promote their financial services in emerging market. The research is a comparative study of the adoption and acceptance of online banking in a develop country like UK as opposed to an emerging market like Nigeria. The study reveals that majority of UK customers are more confident using online banking and carry out most of their banking transaction online. Unlike Nigerian customers where having access to the internet is considered as luxury. Furthermore, both countries highlighted security/privacy and fraud as the key constraint to fully embracing online banking.