Most employers know that terminating employees for poor job performance is not easy. But it is actually legally possible—if employers have the right approach and take specific precautionary measures. However, failing to take these precautions can mean that an employer is either stuck with an incompetent employee or on the losing end of a lawsuit for unfair termination. This article will lay out some essential considerations for employers in Thailand regarding termination of employment for poor performance. First, understand that “poor work performance” is a lack of performance or ability, or an inability to work with other employees. It does not constitute a violation of work rules or regulations. In some cases, however, an employee’s failure to act in accordance with lawful instructions or commands of the employer, resulting in poor work performance, could also be considered a violation of work rules or regulations. This may be the case if the work rules or regulations clearly state that an employee must strictly comply with the employer’s instructions or commands. Second, an employer can, in fact, terminate an employee due to poor work performance. For example, this may be possible in the following scenarios: Records show that an employee’s work performance has fallen below the employer’s required standards, and the employee has not tried to improve his or her work performance for three consecutive years. In addition, it does not appear that the employer was biased when giving ratings or scores for the employee’s work performance. The job description of the employee includes coordination with employees in other departments, but the employee has not been able to do so. Therefore, the employee was reassigned to a new job function, but the employee still did not improve. This suggests that the employee has a lack of interpersonal skills and is not