A complete, practical decision-making manual for Indian entrepreneurs, startup founders, and freelancers navigating business registration. Part 1: Sole Proprietorship — Zero-cost setup, individual tax slabs (ITR-3/4), full control, and unlimited personal liability risks. Part 2: Limited Liability Partnership (LLP) — Combining operational flexibility with personal asset protection, MCA incorporation, and flat 30% tax implications. Part 3: Private Limited Company (Pvt Ltd) — Equity issuance, ESOPs, angel/VC readiness, 22% startup corporate tax rate (Sec 115BAA), and mandatory compliance calendars. Includes a side-by-side comparison matrix, setup vs annual maintenance cost breakdown, essential founder legal glossary (DIN, DSC, CIN, MOA/AOA, SHA, Vesting), and 8 costly legal mistakes to avoid before spending money on incorporation.