Cost of Employee Turnover
Also known as Turnover Cost, Cost per Departure
Cost of turnover is the total financial impact of an employee leaving and being replaced, combining direct replacement costs with the productivity lost while the role is vacant and while the replacement ramps up. It is the number that converts a retention conversation into a budget conversation.
Formula
Cost of Turnover = Separation costs + Vacancy costs + Recruitment costs + Onboarding and training costs + Lost productivity during ramp-upFor a quick estimate, many organisations use a percentage of annual salary: roughly 30–50% for entry-level roles, 100–150% for professional roles, and 200% or more for senior and specialist positions.
Worked example
- Scenario
- A professional role on a £60,000 salary, using a 100% of salary estimate, with 14 such departures a year.
- Calculation
- £60,000 × 1.0 × 14
- Result
- £840,000 annual cost from this role family alone — the figure that justifies a retention programme
What good looks like
Widely cited estimates put replacement cost at one-half to two times annual salary depending on seniority and skill scarcity. Senior, technical and client-facing roles sit at the top of that range because the productivity loss during vacancy and ramp-up dominates the direct costs.
Why cost of employee turnover matters
Retention initiatives compete for budget against things with obvious returns. Without a cost figure, turnover is a chart that goes up; with one, it is a line item large enough to fund the fix. It also changes prioritisation — costing turnover by role family usually reveals that a small number of positions drive most of the spend.
How to improve it
- 1Build the estimate bottom-up for your three highest-volume role families rather than applying one blanket percentage across the company.
- 2Include vacancy cost explicitly. It is usually the largest single component and the one most often omitted.
- 3Track time-to-productivity for new hires so the ramp-up component reflects reality rather than an assumption.
- 4Express the total as a share of payroll — it lands harder with a CFO than an absolute number.
Common mistakes
- Counting only agency fees and advertising, which typically captures under a third of the true cost.
- Applying a single percentage across every role, which flattens the difference between a replaceable role and a scarce one.
- Double-counting the manager's time in both recruitment and onboarding.
Frequently asked questions
What percentage of salary should I use to estimate turnover cost?
As a starting point: 30–50% of annual salary for entry-level roles, around 100–150% for professional and managerial roles, and 200%+ for senior or specialist positions. Replace these with bottom-up figures for your highest-volume roles as soon as you can.
Should lost productivity really be included?
Yes — it is usually the largest component. A vacant role produces nothing, and a replacement typically takes three to six months to reach full productivity. Excluding both makes turnover look far cheaper than it is.
Related metrics
Employee turnover rate is the percentage of employees who leave an organisation over a set period, divided by the average headcount for that period. It is the headline retention metric most HR teams report to their board, and it covers both voluntary resignations and involuntary exits.
Regretted Attrition RateRegretted attrition rate is the share of departures the organisation would have preferred to prevent — typically strong performers, people in critical roles, and those with scarce skills. It is the retention metric that correlates most directly with business impact, because it strips out the exits that were neutral or beneficial.
Cost per HireCost per hire is the total internal and external recruiting spend divided by the number of hires in a period. It is the standard efficiency measure for talent acquisition and the basis for comparing sourcing channels against each other.
Time to ProductivityTime to productivity is how long a new hire takes to reach the expected performance level for their role, measured from start date. It connects hiring, onboarding and learning to a single business-relevant outcome, and it is the largest hidden component of turnover cost.
Revenue per EmployeeRevenue per employee is total revenue divided by average headcount, expressing how much top-line output each person supports. It is the most common bridge between workforce data and financial performance, and it is the metric a CFO is most likely to already track.
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