Abstract: Metro rail systems are required in cities not only to provide an efficient public transportation system, but to decongest urban traffic conditions and make better environmental conditions. The metro rail projects are already in pipeline in many cities however construction works are being getting delayed due to many issues. The focus of this study paper is to investigate major causes of time and cost delayed and to collect data through a questionnaire survey with a wide range of construction professionals based in Metro Projects. The findings from this research determined the major causes of delays based on an importance index, and the main conclusions from output of the data could help the construction sector to better assess not only the major causes of delays on construction projects but also how to minimize them by proper planning and trendy application of working practices.Almost all metro projects in India are facing delay. Delay is generally considered as the most common, complex and risky problem encountered in construction projects. Most construction projects in developing countries are characterized by overruns in time. All projects, regardless of size, complexity are burdened by deadlines and uncertainty. Delays occur in every construction project and the magnitude of these delays varies considerably from project to project. This research carries outa detailed review of the previous studies of the time and cost overrun factors.In the present scenario, apart from addressing the increased requirement delay factors can be minimized by proper decisionmaking throughout the construction process but further research is required. This could include research into the communication of decisions, the content of training programmes for construction site managers, the value of apprenticeship schemes to provide a more skilled workforce, the possibilities of greater use of pre-cast materials etc. this study identified the causes of delays on construction projects in India.Keywords- Delay, Metro, Cost, Time, budget, Management, Risk Management, Planning, Quality, Schedule