The aim of this research is to present a performance audit model with a timely approach in Iran using the grounded theory method. The present research is fundamental in terms of its purpose and qualitative in terms of its implementation and based on grounded theory. The statistical population of this research includes 21 experts and specialists in the field of auditing and were selected through purposive sampling. The research collection tool is a semi-structured interview. The findings were analyzed through open, axial and selective coding and MAXQDA2020 software was used. The research results showed that 85 items and 28 main categories were identified based on the data-based paradigm model and structured in the form of six dimensions. These are: 1) Causal conditions affecting timely performance auditing: 1- Information technology and infrastructure, 2- Organizational and process factors, 3- Human and managerial factors, 4- Environmental and legal factors; 2) The central phenomenon of timely performance auditing: 1- Continuous monitoring; 2- Integration of advanced technologies; 3- Evolution in the role of the auditor; 4- Transparency culture; 3) Contextual factors of timely performance auditing: 1- Organizational and structural factors; 2- Technological infrastructure, 3- Legal and regulatory requirements, 4- Human and knowledge factors, 5- Environmental and economic factors; 4) Strategies for timely performance auditing: 1- Development of advanced technological infrastructure; 2- Strengthening internal controls and organizational processes; 3- Empowering human resources; 4- Improving legal and ethical frameworks, 5- Risk management and organizational resilience, 6- Interaction with stakeholders and improving communications; 5) Consequences of timely performance auditing: 1- Increasing audit quality; 2- Challenges of timely completion.