How to Calculate the Cost of Employee Turnover

Most organizations track how many people leave, but far fewer put a price on it. Yet turnover is one of the largest hidden costs a business carries: every departure triggers spending on hiring, onboarding, and lost productivity. Knowing how to estimate that cost turns a vague worry into a number you can actually manage.

Why it matters

A turnover rate alone does not tell leadership much — 12% sounds fine until you learn it represents half a million dollars a year. Converting departures into dollars makes the case for retention spending, helps you prioritize which roles to protect, and gives you a baseline to measure improvements against.

The formula, in plain words

The estimate has two simple steps:

• Cost per departure = average salary × (replacement cost % ÷ 100)
• Total turnover cost = number of leavers × cost per departure

The replacement-cost percentage is the heart of the calculation. It bundles together everything you spend to replace someone — advertising, recruiter fees, interview time, onboarding, and the productivity lost while the role is vacant or the new hire is ramping up — expressed as a share of the salary.

A step-by-step example

Imagine 10 employees left over the year, earning an average of $55,000, and you use a mid-range replacement cost of 33%.

1. Cost per departure: 55,000 × 0.33 = $18,150.
2. Total cost: 10 × 18,150 = $181,500 for the year.
3. Per month: 181,500 ÷ 12 ≈ $15,125.
4. Run it again at a higher 100% replacement cost for senior roles and the total jumps to $550,000 — which is why the percentage you pick matters so much.

Choosing a realistic replacement percentage

Published estimates range widely. Entry-level and high-volume roles often sit around 30% of salary, mid-level roles closer to 50–75%, and senior, technical, or specialist positions can reach 150–200% once long vacancies and ramp-up time are counted. Because the figure is uncertain, it helps to model a low and a high scenario rather than relying on one number.

Common mistakes to avoid

• Counting only direct costs. Job ads and agency fees are the visible part; lost productivity and knowledge often cost far more.
• Using one percentage for every role. A warehouse hire and a lead engineer do not cost the same to replace — segment if you can.
• Ignoring vacancy time. The longer a seat stays empty, the higher the real cost, regardless of recruiting spend.
• Treating the estimate as exact. This is a planning figure to guide decisions, not a precise accounting entry.

Try it yourself

Plug your number of leavers, average salary, and a replacement percentage into the cost of employee turnover calculator. It shows the cost per departure, the annual total, and a monthly figure — the version that tends to get attention in a budget meeting.