Can the terms and conditions of an Employee’s contract be changed during the course of employment?

The terms and conditions of employment can only be changed if the employee agrees to it. Without your employees’ consent, there will be a breach of contract.

Suggested Readings

How do I terminate my employee’s services? Do foreign employees need to contribute to the CPF fund? As an employer, what does the law require regarding employee resignations? Can a Singapore company hire foreign employees?