Citizens perceptions and evaluations of UK e-government services are not well documented. Official reports concentrate upon provision rather than usage, yet usage is an antecedent of success. Understanding citizens' perceptions, attitudes and intentions is crucial if online government services are to be accepted and widely used. Against this background this chapter investigates usage intentions based upon perceptions of benefits and barriers and against this assesses the likelihood of success in usage terms. Findings indicate that whilst citizens recognise convenience and time savings as key advantages of online e-government services, they remain concerned about financial security, information quality and trust issues.