How Much Are Caustic Workers Costing You?

Research on toxic behavior in the workplace has often focused on how abusive bosses, bullying colleagues, or generally unpleasant coworkers affect morale and day-to-day well-being. A new Harvard Business School working paper takes a more pragmatic approach by putting a concrete dollar value on what these destructive employees cost organizations.

The study, authored by economist Dylan Minor and Michael Housman, Chief Analytics Officer at Cornerstone OnDemand, analyzed data from nearly 60,000 employees across 11 different firms. Toxic workers were defined as employees whose behavior harmed either company property or people, including misconduct such as theft, fraud, bullying, workplace violence, or sexual harassment.

One of the most counterintuitive findings is that toxic employees are often more productive than their peers when measured purely by output. However, this apparent advantage masks a deeper problem: these individuals significantly reduce the productivity of coworkers around them and accelerate turnover across their teams.

As toxic employees drive others to quit, organizations incur substantial replacement and training costs. When these ripple effects are quantified, the financial impact is severe. According to the study, avoiding a toxic hire delivers roughly twice the value of hiring a top-performing “superstar” employee.

While a top 1% worker might return approximately $5,303 in value through increased output, avoiding a toxic hire yields an estimated $12,489 in savings.

Importantly, these figures do not include additional costs associated with litigation, regulatory penalties, reputational damage, or the longer-term effects of reduced engagement and morale. As a result, the authors consider these estimates to be conservative.

The research also identifies warning signs associated with toxic behavior. Overconfidence and excessive self-regard emerged as strong predictors. Such traits can encourage unnecessary risk-taking and foster a belief that one is either too clever or too valuable to face consequences for misconduct.

A key challenge for organizations is that toxic workers are often tolerated precisely because they appear to be high performers. Managers may overlook harmful behavior in exchange for short-term results. The study argues that this tradeoff is financially unsustainable and that inaction is the most costly response of all.

The broader implication is clear: organizations should place at least as much emphasis on avoiding corrosive behavior as they do on recruiting top talent. From a purely economic perspective, preventing toxicity delivers far greater and more durable value than chasing superstar performance alone.