A sole proprietorship is the simplest and most common form of business organisation — an unincorporated business owned and operated by a single individual, where there is no legal distinction between the owner and the business entity. The sole proprietor has unlimited personal liability for all debts and obligations of the business, meaning personal assets can be used to settle business liabilities. The business's income is taxed as the owner's personal income under the applicable income tax slab. Sole proprietorships are the dominant form of small business in India — covering millions of traders, professionals, consultants, and small manufacturers — offering ease of setup, minimal regulatory compliance, and full operational control. However, the unlimited liability and limited access to formal credit are significant constraints on growth. For investors on Ventura Securities and financial analysts, understanding the sole proprietorship structure is relevant when evaluating the creditworthiness of small business borrowers, the KYC and onboarding requirements for individual traders, and the structural shift in India's business landscape as sole proprietors formalise into LLPs and private limited companies for better credit access and liability protection.