Christmas bonuses are calculated based on several factors. These include:
1. Performance throughout the year - The company will look at how well you have performed during the year, taking into account your productivity, attendance, and overall contribution to the company's success.
2. Length of service - The longer you have been with the company, the more likely you are to receive a higher bonus.
3. Company profitability - If the company has been doing well financially, you may be eligible for a larger bonus.