Purpose: This study aims to analyse the internal and external audit strategies implemented by SMEs in Extremadura, evaluating their effectiveness in terms of their impact on reducing fraud risks and improving operational efficiency. The following measures of effectiveness will be used: (1) the number of frauds detected, (2) the average incident resolution rate and (3) internal customer satisfaction. The study aims to identify the best audit practices in this type of companies, in order to promote more effective and efficient strategies that contribute to the improvement of business management and quality. It is expected that the results of this study will be useful for SMEs in Extremadura, auditors and policy makers, in order to improve audit practice and decision making in this type of companies. Methodology: To achieve this objective, the study was based on descriptive qualitative research. This approach was chosen to collect standardised data on audit strategies in a representative sample of SMEs in Extremadura. The target population was the set of SMEs existing in the region of Extremadura. To select a representative sample, stratified random sampling was used, considering the following stratification variables: province (Cáceres and Badajoz), company size (small and medium-sized), economic sector. The final sample consisted of 140 SMEs, randomly selected within each stratum. The data collection instrument was a structured questionnaire, specifically designed for the study. The questionnaire included questions on the following variables: general company information, auditing practices, and external certifications and assessments. Data collection took place between March and May 2020. The following channels were used to distribute the questionnaire: email, social media and phone calls. To facilitate companies' participation, the questionnaire was designed in an online format, using the Google Drive/Forms platform. This allowed companies to complete the questionnaire conveniently and securely from any device with internet access. In terms of data analysis, the data collected was analysed using descriptive and inferential statistical techniques. Descriptive techniques were used to describe the characteristics of the sample and the frequencies of the different variables. Inferential techniques were used to identify significant relationships between variables and to test specific hypotheses. Finally, the study was conducted in accordance with the ethical principles of scientific research. Informed consent was obtained from all participating companies prior to data collection and confidentiality of the information provided by the companies was guaranteed. Results: The results of the study reveal that most SMEs in Extremadura do not have quality systems in place. However, companies recognise the importance of audits as a key tool to improve their management. Despite this, the use of audits is limited due to their high cost and lack of awareness. The research also found that there is a higher participation of companies in Cáceres and in sectors such as construction and food in carrying out audits. Finally, the results suggest that SMEs in Extremadura need to implement better auditing practices to improve their management and competitiveness. It is recommended that government bodies, business chambers and auditing firms work together to promote the adoption of best practices in this area. Limitations: It should be noted that this study has several limitations which, moreover, represent future lines of research. The sample used is 140 SMEs, which may not be representative of all SMEs in Extremadura. Moreover, the low response rate, especially in Badajoz, could bias the results. On the other hand, the context of the pandemic might have influenced enterprises' responses, especially with regard to teleworking and business closures, which made it difficult to conduct face-to-face surveys. The use of online surveys, telephone calls and Google Drive forms may have limited the scope of the study, excluding businesses that do not have internet access or do not respond to telephone surveys. However, despite the limitations mentioned above, the results are interesting enough to justify and extend the research to current and comparative studies with other SMEs in other regions. Originality: The study on SMEs in Extremadura and their relationship with audits is distinguished by its regional focus, its analysis of business heterogeneity, its focus on internal audit, its assessment of management quality, its detailed analysis of audit practices, its identification of gaps and needs, and its potential contribution to decision making. [ABSTRACT FROM AUTHOR]