The Toxic Employee
Personal Work Ethic

The Toxic Employee
Avoiding one is twice as valuable as hiring a star performer

January 10 · Blog

They are out there to sow seeds of negativity and they manifest themselves in several ways. Toxic employees are not only a detriment to themselves, but also to their work environment. This makes it crucial for organisations to proactively identify them and intervene to avoid the negative consequences which will only escalate over time.

What makes a worker ‘toxic’?

A Harvard Business School study covering over 58,000 employees suggests that the factors leading to worker toxicity can be grouped into two types - situational and individual.¹ Situational factors arise from external influences, such as an uncomfortable workspace, or a micromanaging boss.

While situational factors may be temporary and easier to identify, problematic personalities are a much deeper-rooted issue and harder to manage. One of the most seminal studies into personality traits revealed the Dark Triad of personality²:

  • Machiavellianism – justifying any and all actions, even immoral and unscrupulous actions, if they serve the interests of the organisation
  • Narcissism - a grandiose, inflated self-image and desire for power, coupled with a sense of entitlement and lack of regard for others
  • Psychopathy – often referred as antisocial disorder. Psychopaths tend to show little empathy or remorse, and are “cold-hearted, detached and calculating”

Put simply, the psychology of people with these traits indicates that they are egocentric, self-righteous and inconsiderate. At the workplace, they exhibit themselves in many forms - as bullies, slackers, gossipers, naysayers, offenders, narcissists - only to mention a few, but they can and do masquerade as “normal” much of the time, at least long enough to get through a job interview! 

The implications

Toxic employees are perhaps worse than the metaphorical bad apple. They not only ruin the bunch but can also harm other bunches, if not the entire garden. Their presence can deteriorate morale and compel high-performing employees to resign. In the gravest cases, actions of toxic workers may lead to claims against the company, either from other employees or clients. The ramifications also translate into numbers – It can cost a company up to US$12,500 to replace workers lost due to the presence of a single toxic employee on a team, according to a 2015 study.³

Recognising a toxic employee

Your best defence against toxic employees is to avoid hiring them. Spotting the red flags early in the recruitment process can save firms the trouble of taking corrective action later.⁴ Easier said than done though, hiring managers can use a few strategies to look out for traits peculiar to toxic employees in job interviews:

  • Observe behaviour, such as timely (or late) arrival at the interview, or their conduct with the receptionist
  • Instead of asking questions about hypothetical situations, testing for ‘civility’ can reveal more meaningful information.⁵ Try asking the candidate what their former employer or subordinates would say about them, or to describe how they handled a conflict.
  • Ask about unpleasant scenarios such as things they do not like about their past employer to reveal signs of toxicity
  • Questioning about past failures can indicate whether a candidate takes responsibility for their mistakes or blames others

For identifying toxic employees in your existing team, observing employees’ Personal Work Ethic can help. Look out for the following good and bad Personal Work Ethics to distinguish between toxic and non-toxic employees: Toxic Employee

Managing toxic employees

Knowledge of the sources of toxicity is a crucial step for tackling the problem - it allows managers to identify and nip potential issues in the bud.

If it stems from individual factors (such as an intractable character or personality trait), it would be somewhat immune to controllable aspects of the work environment. In such cases, it is wise to let go of the toxic employee early on before things get out of hand.⁶ These would typically be employees whose behaviour could escalate into grave problems if retained, such as sexual harassment, client loss and litigation.

In cases of situational toxicity, strategies to manage the situation, people, and/or stressors may help. Simply asking the employee about their wellbeing can reveal that they may be going through tough times - perhaps the grief of losing a loved one or a toxic home environment.

It is also important to realise that it may not always be the employees’ fault or a problem stemming from individual factors. Leaders must be prepared to investigate issues within the work environment which might be fuelling toxicity. It could also be that these people are unaware of their actions’ effects. Managers should then try to explain these effects to toxic workers followed by the kind of behaviour the company expects.

A resilient and invigorating work environment is key for the psychological welfare of employees. SHAPE can help organisations understand its employees better and improve overall work environment by offering best practices on building a healthy workplace.


¹Housman, Michael, and Dylan Minor. 2015. “Toxic Workers,” October. https://www.hbs.edu/faculty/pages/item.aspx?num=50046.

²Paulhus, Delroy L, and Kevin M Williams. 2002. “The Dark Triad of Personality: Narcissism, Machiavellianism, and Psychopathy.” Journal of Research in Personality 36 (6): 556–63. https://doi.org/10.1016/S0092-6566(02)00505-6.

³Smith, Ernie. "How Toxic Employees Affect Organizations." Associations Now. August 06, 2018. https://associationsnow.com/2018/08/toxic-employees-affect-organizations/.

Mautz, Scott. 2019. “A 50,000 Person Harvard Study Reveals the 3 Telltale Signs of the Most Toxic Employees.” Inc. August 8, 2019. https://www.inc.com/scott-mautz/a-50000-person-harvard-study-reveals-3-ways-to-spot-most-toxic-employees.html.

Harvard Business Review. 2016. “How to Avoid Hiring a Toxic Employee,” February 3, 2016. https://hbr.org/2016/02/how-to-avoid-hiring-a-toxic-employee.

“How Much Are Toxic Workers Costing Your Company?” World Economic Forum. Accessed December 3, 2020. https://www.weforum.org/agenda/2015/12/how-much-are-toxic-workers-costing-your-company/.

Personal Work Ethic

Change your SHAPE