The Payment of Bonus Act, 1965 aims to regulate bonus payments to employees in establishments with 20 or more workers. Key objectives include imposing responsibility on employers to pay bonus, designating minimum/maximum bonus percentages, and prescribing a bonus calculation formula. The Act applies to factories and establishments with 20+ employees but excludes certain organizations. To qualify for bonus, employees must earn up to Rs. 21,000/month and work at least 30 days. Employers who violate the Act face penalties like imprisonment or fines.