The usefulness of reports published by companies depends upon the accuracy of information and their timeliness. Timeliness of financial statements is one of the main attributes of relevance. The present study is aimed to evaluate the information content and factors affecting the timeliness of financial report in petrochemical companies in Iran. The study methodology is descriptive-correlation. In this study, total companies active on petrochemical during the period 2011-2015 are selected for study population and based on the applied restrictions, 9 companies are chosen as sample of study. The hypotheses are tested using regression model, panel method with fixed effects. The results show that firm size, size and reputation of audit foundations, return on asset of financial risks and financial year-end are effective on timelines of financial reports of petrochemical companies in Iran.
