The number everyone repeats
Ask a room of building service contractors for a turnover rate and someone will say 200%. It is in whitepapers, in sales decks, in conference sessions. It sounds like an industry law.
It is not. As one careful compilation of cleaning-industry turnover statistics puts it, the figure "circulates without a named primary source" and could not be traced to one, despite being repeated across vendor content and stat aggregators (Rapid Eye Inspections, cleaning industry turnover statistics). The claim appears in a 2024 janitorial whitepaper from 4M Building Solutions as "averaging around 200% and sometimes reaching as high as 400% annually." From there it spread, minus the attribution.
Why care about the sourcing on a number that is directionally right anyway? Because if you build a retention budget, a wage strategy or a bid's labor assumptions on a figure nobody can trace, you cannot tell when it stops being true. And the documented picture is more useful than the folklore, because it tells you where your firm can actually get to.
What the numbers actually say
The best public benchmarking primary in this category is the ISSA/BSCAI contractor benchmarking survey, a member survey of 64 firms with a 4% response rate, run in 2017. Its distribution on annual employee turnover:
| Annual turnover | Share of firms |
|---|---|
| Under 10% | 20.3% |
| 11–20% | 14.1% |
| 21–29% | 10.9% |
| 30–39% | 9.4% |
| 40–49% | 4.7% |
| 50% or more | 40.6% |
Read it as a distribution, not an average. About 41% of contractors report 50% or more annual turnover, and one in five keeps it under 10%. The difference between those two groups is not luck. It is wage position, scheduling, supervisor quality, and whether the firm treats a building as a route to be optimized or a crew to be kept.
Now the federal data, which measures something different and is worth separating. The BLS projects roughly 351,300 janitor openings a year, mostly to replace workers who leave; that works out to about one seat in seven refilled annually across the occupation. That is replacement demand for the occupation as a whole, including in-house janitorial staff at schools, hospitals and government buildings, so it is not a contractor churn rate. It is the size of the hiring pool you are competing in.
The tenure trend is the number I would put in front of an owner. Median cleaner tenure has fallen from 4.3 years in 2014 to 3.5 years in 2024. A shorter median tenure on the same job is a leading indicator for the cost line: more time in training, more supervision hours per productive hour, more client complaints tied to a face the tenant does not recognize.
What one departure costs
The same compilation puts replacement cost at roughly $18,500 to $74,000 per departure, at 0.5x to 2x annual salary. That range is wide on purpose and it is honest about being an estimate, since the underlying methodology comes from general workforce research rather than a cleaning-specific study. Still, run the arithmetic with your own numbers, because the components are all real:
- Recruiting and screening, including background checks where the client requires them, and advertising for a post nobody wants.
- Onboarding and training hours, paid at a wage while producing less than a trained cleaner produces, plus the supervisor time to do the training.
- Coverage overtime while the seat is empty, usually at time and one-half, often at the last minute.
- Quality erosion in the interim: complaints, credits, the property manager's patience.
- Client risk, which is the one that does not appear on any P&L but decides whether the account renews.
Take a mid-range number and apply it to a 120-person operation at 50% turnover: 60 departures a year. At even $6,000 of fully loaded internal cost per departure, that is $360,000 a year, more than a 3-point margin swing on a $10 million book. And that number probably understates it, because it leaves out the renewal you lost.
The reframe that changes the bid
Here is the move that separates the firms with sub-10% turnover from the ones quoting 200%: stop treating turnover as an input and start treating it as an output of the bid.
A bid priced at the bottom of the local wage band has already chosen a high-turnover workforce. That choice shows up later as coverage overtime, complaint volume and supervisor churn, but it was made in the estimating spreadsheet. The firms in the under-10% group are not necessarily paying premium wages across the board; they are usually doing four specific things:
- Paying above the local market at the entry post and holding the line there, because the post is the product. A dollar an hour at 40 hours a week is about $2,080 a year per head, which is a fraction of the low end of the replacement cost range.
- Scheduling that a person can live on. Consistent buildings, consistent nights, predictable hours. Route churn is a retention killer disguised as efficiency.
- A supervisor who is present, which is why day porter programs and supervisory presence correlate with lower churn even at higher wage cost. Visible supervision is a retention mechanism, not just a quality mechanism.
- A first-90-days process. The employees who leave in month two were decided in week one, and the cost of that departure is paid in full either way.
What to measure
You cannot manage this with a single annual rate. Track three numbers monthly:
- 90-day retention: share of new hires still on the job at 90 days. This is your leading indicator.
- Coverage overtime as a percentage of scheduled hours: this is turnover's cost showing up in the payroll file before anyone calls it turnover.
- Supervisor span and tenure: how many accounts per supervisor, and how long supervisors stay. Supervisor turnover is usually the hidden variable behind crew turnover.
Add the actual replacement cost per departure, computed from your own recruiting invoices, training hours and overtime, and you have a number you can put against a wage increase in a budget meeting. That conversation is unwinnable with "turnover is high in this industry." It is winnable with "each departure costs us $X, we had 60 of them, and $1 an hour at the entry post is $2,080 per head per year."
The honest bottom line
The 200% figure gets repeated because it makes a bad situation feel inevitable. The documented data does not support inevitability. It supports a spread: a fifth of contractors hold turnover under 10% while two-fifths run over 50%, on the same labor market, in the same industry, in the same year.
That gap is a competitive opening. Retention is one of the few levers in contract cleaning that improves margin, quality and renewal odds at the same time, and it is available to a 40-person firm without a capital budget. The firms that treat it as a strategy rather than a complaint will be the ones buying the others.
Sources: ISSA/BSCAI contractor benchmarking survey (2017, 64 firms) as compiled by Rapid Eye Inspections; BLS occupational projections and tenure data. Replacement-cost range is a general workforce estimate, not a cleaning-specific study; substitute your own computed cost.
