This booklet has been designed to meet that very need: a concise practical and up-to-date reference for economic operators consultants accountants financial managers and students who seek a comprehensive understanding of the laws governing Iran's business environment. In compiling this guide special effort has been made to:• Incorporate the most recent legal and budgetary reforms in Iran (up to the year 1404/2025);• Explain key regulations-such as the Direct Tax Law Labor Law Social Security Law Commercial Law and Capital Market Law-in accessible and practical language;• Present important concepts in the form of tables charts and real-life examples;• Give special attention to high-impact and complex topics such as tax rates exemptions statutory books contractor regulations insurance requirements for production workshops corporate assemblies and banking compliance;• Include analysis of important draft laws currently under review-such as the Capital Gains Tax Law amendments to the tax code and the new Commercial Law-so that economic actors can prepare in advance for upcoming changes. This booklet is a practical general guidebook for investing in Iran.