The True Cost of a Bad IT Hire (It's Not What You Think)

The obvious costs are easy to calculate: recruiter fee (typically 20–25% of first-year salary), months of salary for an underperforming hire, and the replacement search fee when they leave or are let go.

For a $150K IT engineer, that's $30–37K in recruiter fees plus 3–6 months of salary before the issue is identified and acted on. That's a $100K+ problem before you even start replacing them.

The real cost comes from second-order effects: the time senior engineers spend managing and compensating for a struggling hire, the technical debt created by poor-quality code that has to be unwound, the project delays that cascade into missed revenue milestones, and the team morale impact when high performers are carrying extra load.

Studies from the Society for Human Resource Management put the total cost of a bad hire at 50–200% of the employee's annual salary. For a senior IT hire at $180K, that's $90K–$360K.

Prevention is almost entirely a function of process quality, not luck. Structured technical interviews with defined scoring rubrics, consistent reference checks (not optional, not cursory), work sample assessments, and clear 30/60/90 day success criteria eliminate the majority of bad outcomes.

Partnering with a staffing firm that pre-vets candidates on your behalf and provides a placement guarantee shifts the risk away from you entirely.