{"id":1615,"date":"2026-08-11T09:24:48","date_gmt":"2026-08-11T00:24:48","guid":{"rendered":"https:\/\/est.haro-inc.com\/?p=1615"},"modified":"2026-08-11T09:24:49","modified_gmt":"2026-08-11T00:24:49","slug":"vietnam-turnover-warning-signs","status":"publish","type":"post","link":"https:\/\/est.haro-inc.com\/en\/talent-en\/vietnam-turnover-warning-signs\/","title":{"rendered":"Catching Turnover Before It Happens \u2014 The Warning Signs Hidden in Your HR Data"},"content":{"rendered":"\n

“One of our best people walked in one morning and handed me a resignation letter, completely out of the blue.” It’s a story you hear again and again at Japanese companies operating in Vietnam. But the truth is that most departures are never actually “sudden.”<\/strong><\/span> People who leave start giving off signals months before they resign. The problem is that our instincts alone aren’t reliable enough to catch them.<\/p>\n\n\n\n

What’s more, the things people commonly think of as “signs of an imminent departure”\u2014a resume left out on a desk, showing up in an interview suit, a sudden increase in doctor’s visits\u2014are, in fact, not warning signs at all in any scientific sense<\/span>. The real signals appear much more quietly, buried in your HR data. In this article, we explain the “pre-departure signs” you can capture with data, not gut feeling<\/strong><\/span>, backed by research evidence. This is the second installment in our “Retention & Reducing Turnover” series. Where the first installment, “Vietnam’s Turnover Rate in Numbers,”<\/a> covered the big picture, diagnosis, and countermeasures, this article zeroes in on one thing\u2014early detection\u2014and goes deep.<\/p>\n\n\n\n

1. Why Catch the Early Signs \u2014 Once the Resignation Lands, It’s Too Late<\/h2>\n\n\n\n

Early detection matters because in Vietnam, trying to retain someone after the resignation letter is on the table is usually too late<\/strong>. As we saw in the first installment, Vietnam is a high-mobility market where 64.8% of employees are considering a job change within six months<\/strong><\/span> (Talentnet-Mercer). On top of that, Vietnam’s headhunting market has recently expanded from around 200 firms to roughly 500<\/span> (Talentnet), so the more in-demand the role, the more external offers an employee is exposed to\u2014and the shorter the window between the first warning sign and an actual departure.<\/p>\n\n\n\n

At the same time, turnover is not something that simply can’t be prevented. According to Gallup, 42% of voluntary turnover was preventable<\/strong><\/span>\u2014in other words, the manager or the organization could have done something. Furthermore, 45% of people who left had almost no meaningful conversation with their manager in their final three months<\/strong>. Flip that around, and it means there is a very real category of departures that could have been prevented if the warning signs had been caught and a conversation had happened before the resignation. That is exactly why capturing “pre-departure signs” is worth the effort.<\/p>\n\n\n\n

2. Myth vs. Reality \u2014 What the Real “Pre-Departure Signs” Are<\/h2>\n\n\n\n

Before we talk about the real signals, we first need to debunk some widely believed myths<\/strong>. Get this wrong, and you’ll end up monitoring things you shouldn’t while missing the signs that actually matter.<\/p>\n\n\n\n

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These Are NOT Warning Signs \u2014 Common Misconceptions<\/strong><\/p>\n\n\n\n

“Leaving a resume out on the desk,” “showing up in an interview suit,” “a sudden increase in doctor’s visits”\u2014these visible behaviors are, in fact, not warning signs of turnover at all<\/span>, as clearly disproven in research by Gardner & Hom (2016) of Cornell University. Managers who treat these as “red flags” are relying on assumption; the study found no statistical link between these behaviors and actual departures. Monitoring based on gut instinct only generates false alarms.<\/p>\n<\/div><\/div>\n\n\n\n

So what are the real signs? The same research identified 13 “pre-quitting behaviors.”<\/strong><\/span> They included a decline in work performance and productivity, reduced engagement with the team and the job, doing only the bare minimum, more frequent expressions of dissatisfaction, and a loss of enthusiasm and idea generation. Employees whose scores on these behaviors reached an average of 4.2 or higher were reported to be roughly twice as likely to leave<\/span> compared with those who did not.<\/p>\n\n\n\n

In other words, the genuine signals are not “flashy, visible behaviors” but rather a quiet decline in engagement and output<\/strong>. Precisely because they aren’t dramatic, they are easy to overlook\u2014which is exactly why capturing them with data matters. Academic meta-analysis (Rubenstein et al. 2018) likewise confirms that the strongest leading indicators are the intent to leave and job-search behavior itself<\/strong>, followed by changes in performance and attitude.<\/p>\n\n\n\n

3. Different Types of Signs Appear at Different Lead Times<\/h2>\n\n\n\n

One thing worth keeping in mind when tracking warning signs with data is that “how many months in advance a sign appears” varies by the type of sign<\/strong><\/span>. The earlier a sign shows up, the larger the window you have to intervene.<\/p>\n\n\n\n

Type of Sign<\/th>How Long Before Departure<\/th>Source<\/th><\/tr><\/thead>
Decline in engagement (involvement, loyalty)<\/td>~9 months before<\/strong><\/td>Peakon (analysis of 33M+ data points)<\/td><\/tr>
Decline in performance \/ productivity<\/td>2\u20136 months before<\/strong><\/td>Ko & Trevor 2026<\/td><\/tr>
Pre-quitting behaviors (lower engagement, more dissatisfaction)<\/td>Predicts departure within 12 months<\/strong><\/td>Gardner & Hom 2016<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

In Peakon’s “9-Month Warning,” which analyzed more than 33 million data points, it was shown that departing employees’ sense of loyalty and perceived managerial support begin to decline continuously about nine months before they leave<\/span>. Performance decline, by contrast, appears much closer to the departure\u2014becoming significant 2\u20136 months out (Ko & Trevor 2026). If you can catch the shift in engagement early, you have more than half a year to act; by the time performance decline is visible, your time is already running short.<\/p>\n\n\n\n

4. The Concrete Signs That Show Up in Your HR Data<\/h2>\n\n\n\n

So where in your day-to-day HR data should you actually look? Here we organize the observable warning signs into four categories\u2014attendance, leave, payroll, and evaluation<\/strong>\u2014with a note on “why it’s a warning sign” for each.<\/p>\n\n\n\n

Attendance Signs<\/h3>\n\n\n\n