On all Swedish audits on fiscal years starting 1st of January 2011 or later, the clarified ISAs should be applied. Before that, the Swedish auditing standards were called RS, which were a direct translation of the elder version of the ISAs but with considerations of Swedish law and Swedish traditions. The EC states that there will be no fundamental changes for the Swedish audits when the clarified ISAs is implemented, and IFAC states that all audits will realize significant changes when the clarified ISAs is implemented. The purpose of this study is therefore to explain how the audit process has been affected by the implementation of the clarified ISAs and what effects it has given rise to. The study also aims at explaining the relationship between audit firm size and impact on the audit process. This study was conducted using qualitative methods for both collecting and analyzing data. The data have been collected using both primary and secondary data. The primary data was collected through questionnaires in order to get as many opinions as possible but interviews were conducted as well in order to get a deep insight about the subject and to make sure that the questions in the questionnaire was relevant. What emerged in this study is that both the EC and IFAC were right about the implementation of the clarified ISAs in Sweden. The auditors that participated in this study explained that the way they are doing an audit has not changed, which means that no fundamental changes have occurred in the audits. However, the auditors have experienced some changes in the audit process, for example an increased amount of requirements on documentation and a more complicated and time consuming auditor’s report. How much the audit process has changed differs depending on the size of the audit firm. Generally, the impact on the audit process at the “big four” are less than it is on small audit firms due to the fact that many of the “big four” have worked with ISA before. Overall, the auditors have experienced that the implementation of the clarified ISAs have meant an increased cost for doing audits, in the form of updates in audit methodologies, educations and more procedures to perform. However, the auditors have not experienced that the audit quality has increased due to this. This means that the costs for an audit have increased while the quality remains the same.