The hidden cost of a bad Tech Hire (and why it’s higher than you think)

Hiring an engineer who doesn’t work out costs money. But the number you see in the budget is never the real number.

If you hire someone for $5,000 per month and they leave after one month, the obvious cost is $5,000.

But that’s just the tip of the iceberg.

The total cost of a failed tech hire is much higher and depends on the position's seniority.

Why So Much?

First, there’s the recruiting cost: agency fees, internal interviews, technical assessments, and the time your hiring team spends throughout the process.

Second, there’s onboarding: HR resources, access setup, equipment, documentation, and everything else required to get someone up and running.

Third, there’s the opportunity cost. While you’re waiting for a new hire to become productive, typically 3–4 months for junior roles and 6+ months for senior roles, they aren’t generating their full expected value.

Fourth, when the hire doesn’t work out, you have to start the process all over again.

And fifth, there’s the impact on the existing team: lower motivation, unclear responsibilities, incomplete project handoffs, and the infamous “domino effect.” When instability sets in, one person leaves and others may start following.

How Do You Prevent It?

There’s no 100% guarantee. But companies with low turnover caused by poor hiring tend to share several patterns:

A rigorous evaluation process — not just technical screening.

A serious assessment of cultural fit.

Structured onboarding.

Clear feedback during the first 30 days.

And when something feels wrong, they act quickly instead of giving someone six months “to adjust.”

The cost of doing hiring well is significant.

But the cost of doing it poorly is much higher.

Carla Costantini, Global Talent Partner at PeopleFirst Talent Partners