It appears that you do not have a proper policy on Performance Appraisal (PA) in place. When employees join the company, during induction itself, they should be informed about when their appraisal will take place. The salient features of the policy could be as follows:
a) Appraisal may be done quarterly. The appraisal cycle of one year is too long. Nevertheless, a salary hike may be done on 1st April or 1st October.
b) For employees who join in between, the timing of their first PA can be decided in the policy.
c) The percentage of salary hike should be linked to the score of the PA.
The key point is that PA focuses solely on individual performance. We need to expand our focus and measure business performance as well. To achieve this, a well-designed policy on Performance Management Systems (PMS) is necessary. There was a query regarding PMS in this forum to which I have replied. You can refer to my response by clicking on the following link:
https://www.citehr.com/511936-pms-company.html
In the provided link, you will find several other relevant links. I recommend going through all of them patiently as it will enhance your understanding of the subject.
If you have further questions or concerns, feel free to reach out to me on my mobile number.
Thanks,
Dinesh Divekar
[Phone Number Removed For Privacy Reasons]