My answer to your query is as follows:
Gratuity Eligibility
Gratuity is payable by the employer as per the POG Act. According to this Act, gratuity is payable at the time of leaving the service after a minimum of 5 years. Since you worked for 9 months, you are not entitled to gratuity from your employer.
Gratuity in CTC
You mentioned that the CTC offered by your employer included gratuity with a monthly deduction towards it. I would like to point out that you may be misinterpreting it. It may not necessarily be your mistake but rather a misunderstanding by your HR personnel who might not have grasped the concept of CTC correctly.
While there may be a reduction in your take-home salary, CTC is not your salary; it is a cost to the company. The employer is required to make provisions for your gratuity from the beginning of your employment by investing in a Gratuity fund. Although there are offsets and adjustments when a member leaves or a new member joins, the employer may not be fully aware of these calculations. Actuarial professionals typically handle these calculations. Therefore, if gratuity is included in CTC, I would not categorically say it is incorrect. However, I do not advocate for the inclusion of gratuity in CTC by the employer. This topic is entirely different and somewhat out of context here.
I often come across such unpleasant situations. I hold the HR person responsible for this as it reflects their failure to understand the concept of CTC. Their typical response is that the boss or employer instructed them to deduct gratuity from your salary.
I have attempted to explain the concept of CTC to HR professionals on several occasions, even on this forum. Unfortunately, the discussions have often been counterproductive or vague. If I recall correctly, I once suggested in one of my posts that members should include a footnote in CTC, stating that gratuity, although considered in CTC, is payable to the employee upon completion of 5 years of service.
I hope my discussion here is not without merit.