In this guide
In HR, attrition means employees leaving the organisation, counted over a period of time and usually expressed as a rate. Strictly it means an exit where the role is not refilled. In everyday Indian use it has come to mean any exit at all.
The word matters less than the splits underneath it: voluntary or not, regretted or not, and how long the person had been there. Those three change what you do next. The label does not.
The short answer
Attrition is the gradual reduction of a workforce through people leaving. The word comes from wearing something away by friction, which is a more accurate description of how it feels to run a team through a bad year than most HR vocabulary manages.
As a measure, it is nearly always a rate rather than a count: exits divided by average headcount, times a hundred. The attrition rate formula has the arithmetic and a calculator.
Why Indian HR says attrition
If you have worked in an Indian company you have heard “attrition is up” far more often than “turnover is up”. If you have worked in an American one, the reverse.
There is no deep reason for it. The vocabulary of Indian people management grew up alongside IT services and BPO in the nineties and two-thousands, where attrition was the number on the wall, reported monthly, annualised, and argued about in every operations review. The word stuck, and it spread from there into startups that have never run a shift roster in their lives.
It is worth knowing only because it affects what you search for and what your tools call things. A global HR system will label the field “turnover”. Your CFO will ask about attrition. They mean the same column.
The kinds of attrition
| Term | What it means | What it tells you |
|---|---|---|
| Voluntary | The employee chose to leave | The one you can influence. This is the number worth watching. |
| Involuntary | The company ended the employment | A record of your own decisions. Real, but not a warning sign. |
| Regretted | A voluntary exit by somebody you wanted to keep | The expensive subset. Usually a third to a half of voluntary exits, and the only one worth losing sleep over. |
| Non-regretted | A voluntary exit that suited both sides | Healthy at a low level. A company with zero of it is probably not being honest with itself. |
| Infant | Leaving inside the first 90 days or six months | Points at hiring and onboarding, not at the job itself. |
A single number that mixes all five is not a metric. It is an average of five unrelated things, and it will move for reasons you cannot trace.
Attrition, turnover, churn, shrinkage
- Attrition. People leaving. Strictly, without a backfill.
- Turnover. The same thing, with a backfill. Used interchangeably in practice.
- Churn. Borrowed from the customer side. If somebody says “employee churn” they usually came from a growth or product background, and they mean attrition.
- Shrinkage. Not an exit at all. In contact centres it means the share of paid time when someone is not available to take work: leave, breaks, training, absence. It sits next to attrition on the same dashboard, which is why the two get muddled, but a person on a training day has not left.
Infant attrition, and why it is counted apart
Someone resigning in week six is not the same event as someone resigning in year three, and averaging them together tells you nothing about either.
An early exit is usually a mismatch that was created before the person started: a role described one way and experienced another, a manager they never met during the process, a team that turned out to be two people rather than eight. Almost none of it is fixed by anything you do after they join, which is why it belongs in a separate line.
In India there is a second reason to watch it: candidates frequently hold several offers through a long notice period, and a share of your early exits are people who kept looking after accepting. That is a recruiting problem wearing an attrition costume.
What a useful attrition report contains
Four columns and a date. Anything beyond this is decoration.
- The LTM voluntary rate, by department, for any department with enough people that the number means something.
- Of those, which were marked regretted by the manager at the time.
- Tenure at exit, bucketed: under 90 days, under a year, over.
- The stated reason, and separately, what the manager believed the real reason was.
That last pair is the only genuinely interesting row, and it is the one almost nobody keeps. The gap between the two is where your retention problem lives.
The number after the number
Every definition on this page describes something that has already happened. That is what attrition is: a count of departures, assembled after the departures.
Which is fine, as long as you are honest that no amount of refining the definition will make it arrive any earlier. Gallup found in 2019 that 51% of people who left said nobody had spoken to them about how they were doing in the three months before they went. The attrition report covering that quarter would have looked completely normal, because nothing had happened yet.
If you want a measure that moves during those three months rather than after them, that is a different kind of number, and that is what burnout data is for. Or start with why retention is a measurement problem.
Questions people ask
What does attrition mean in HR?
Attrition is people leaving an organisation and not being replaced in the same role, counted over a period of time. In everyday Indian HR use it has widened to mean any employee exit, voluntary or not, and it is normally expressed as a rate: exits divided by average headcount, times 100.
What is the difference between attrition and turnover?
Strictly, attrition is an exit where the role is not backfilled and turnover is one where it is. In practice the two words are used interchangeably and calculated identically, and almost no Indian HR report distinguishes them. The distinction that actually changes your decisions is voluntary against involuntary, not attrition against turnover.
What is voluntary attrition?
An exit the employee chose: a resignation, a retirement, a move. Involuntary attrition covers exits the company chose, such as a termination or a role being cut. Reporting them as one number is the most common mistake in attrition reporting, because it mixes an outcome you are trying to prevent with a decision you made deliberately.
What is regretted attrition?
A voluntary exit by somebody the company wanted to keep. It is a judgement, not a calculation, so it has to be recorded by the person’s manager at the time of the resignation rather than reconstructed later. A company with 14% attrition where almost none of it is regretted is in a very different position from one at 9% where all of it is.
What is infant attrition?
People leaving within their first few months, usually counted at 90 days or six months. It is tracked separately because it points somewhere different: at hiring, at the accuracy of the job description, or at onboarding, rather than at anything that happened over a long career with the company.