The real cost of a bad hire is one of the most cited — and least measured — statistics in HR. Most companies do not actually track it. SHRM's research puts the average at $17,000 per bad hire in the United States. The UK's CIPD estimates £30,000 for a mid-level role. For Bulgaria, no official figure exists — but the components are the same and the math is straightforward. Amounts below are in euros (€), converted at the fixed rate of €1 = BGN 1.95583.
How to calculate the actual cost
The cost of a bad hire has four categories. Each can be estimated from data HR teams already hold:
1. Direct recruitment costs
Job board listings (€100–€400 per posting), agency fees (15–25% of first-year salary if used), and the time HR and hiring managers spend on screening, interviews, and coordination. At the average Bulgarian gross salary of approximately €1,580/month (NSI, Q4 2025) for a manager, 20 hours of interview time costs roughly €200 in salary equivalent alone.
2. Onboarding and training investment
The first 90 days carry the highest cost per unit of productivity. A structured onboarding programme requires 40–80 hours of HR and line manager time. For a mid-level hire, this represents €750–€1,500 in absorbed cost before the employee is fully productive. Add any external training or access licences and the number rises further.
3. Productivity loss
Research consistently shows that a new hire operates at 25–50% of full productivity for the first six months. For a role with a €18,000 annual salary equivalent, the productivity gap over six months is €4,500–€9,000. When the hire fails and the role sits vacant during re-hiring, that gap extends further.
4. Team and organisational impact
A bad hire disrupts the people around them. Colleagues absorb tasks, managers spend time on performance management, and in some cases team members leave as a result. Gallup's research links manager quality to 70% of employee engagement variance — a bad hire in a supervisory role multiplies the damage across the entire team.
What the total looks like
For a mid-level Bulgarian role at €1,300–€1,800/month gross, a failed hire within the first 12 months typically costs between €13,000 and €28,000 — once all four categories are counted. For a department head or senior specialist, the figure exceeds €40,000.
What reduces the risk
Three practices have the strongest evidence base: structured interviews with consistent scoring criteria (reduce variance in candidate assessment), 90-day onboarding plans with clear milestones (reduce time-to-productivity), and stay conversations at 30 and 60 days (identify fit problems before they become resignations). The companies that measure cost-of-bad-hire tend to invest more in structured hiring — because the ROI is visible.
