A practical, template-driven guide for first-time bug bounty hunters on HackerOne and Bugcrowd. It shows exactly how to turn raw vulnerabilities into clear, reproducible, and impact-focused reports that triagers accept. Includes platform-specific nuances, fill-in-the-blank report structures for web, mobile, and API/GraphQL, severity and impact justification frameworks, proof-of-concept standards, evidence capture toolkit, communication scripts, annotated accepted report examples, and a flexible budgeting toolkit for variable bounty income.