In most organizations, to be eligible for Sabbatical leave, one should have a good rating in the past, and there is also a minimum tenure that an employee should have completed with the company.
In my organization, one can apply for Sabbatical Leave if they have been with the company for 5 years or more and have an 'A' rating for the past 3 consecutive years. The leave is for 3 months paid, where one receives 100% of their salary in the first month, 80% in the second month, and 60% in the third month. After the leave is completed, the employee returns to their normal payroll cycle.