Ask an executive how they're doing and they'll tell you they're fine, right up until they aren't. Ask their calendar instead, and it will tell you the truth about six months before they do.
I stopped relying on how executives describe their own state years ago. Not because they're being dishonest — because self-report is genuinely unreliable for this population. High performers are trained, by years of reinforcement, to say "fine" under load. The description lags the reality by months. What doesn't lag is behavior, and there is one specific behavior that has proven, across hundreds of clients, to be the most consistent early signal of burnout on the way: how long it takes someone to make an easy decision.
Why feelings are the wrong data
Burnout doesn't announce itself with a feeling most executives are willing to name early. It shows up first as behavior change, and the specific behavior that shifts earliest and most reliably is decision latency — the gap between when a low-stakes, low-complexity decision lands in front of someone and when they actually resolve it. Approving an expense. Replying to a straightforward internal email. Confirming a meeting time. These are decisions that, at full capacity, get resolved in seconds, almost without conscious effort.
As cognitive and emotional reserves deplete, this gap widens long before anything else visibly changes. The executive is still showing up, still making the big calls, still performing competently in visible settings. But the easy stuff starts to sit. A same-day reply becomes a two-day reply. A five-minute approval becomes something that gets pushed to "later" three times before it happens. This is the earliest reliable tell, because unlike a strategic decision, there's no legitimate complexity to blame the delay on.
The metric: decision latency ratio
I have clients track one number: the average time between receiving a genuinely low-stakes decision and resolving it, measured across a rolling two-week window. Most executives, at full capacity, resolve this category of decision same-day, often within the hour. A rising average — same-day slipping to next-day, next-day slipping to two-plus days — is the signal, and it shows up in the data three to six months before the executive would describe themselves as burned out.
You will lie to yourself about how you feel long before you can lie about how long it took you to answer an easy email.
This works as a leading indicator precisely because it's behavioral rather than self-reported. It doesn't ask the executive to accurately assess their own state, which is the exact judgment that degrades first under strain. It measures something concrete that happens whether or not they're paying attention to their own condition.
How to actually track it
The method doesn't need to be sophisticated. For two weeks, flag every decision that lands on your desk which you'd honestly categorize as low-stakes — the kind of thing that, on a good week, you'd resolve without a second thought. Note when it arrived and when you actually resolved it. At the end of the window, calculate your average. That's your baseline.
From there, spot-check the same window quarterly, or any time your gut tells you something feels different but you can't point to why. A baseline that holds steady means your capacity is holding steady, regardless of how demanding the quarter has been. A baseline that's crept from same-day to two-day, even while your output on the big decisions looks unchanged, is the earliest hard data you'll get that something underneath is depleting. It gives you months of runway to intervene before the deficit becomes visible anywhere else — in judgment quality, in relationships, in the decisions that actually matter.
What the trend actually predicts
In the clients I've tracked this with over multiple years, a decision latency ratio that doubles from its baseline and holds there for three consecutive weeks has, with striking consistency, preceded a visible burnout episode by four to six months. The executive typically still looks and performs fine to everyone around them during that window — the number moves long before the more visible signs do, which is exactly what makes it useful. By the time colleagues or family start commenting that something seems off, the latency ratio has usually already been elevated for months.
The intervention at that stage doesn't need to be dramatic. Often it's as simple as protecting one recovery block a week that had quietly disappeared, or addressing a specific operating-model issue that's been generating a steady stream of low-grade decisions with nowhere efficient to land. The point of catching it early is that the fix at month one is minor. The fix at month six, once the pattern has become a full burnout episode, is not.
One caution worth naming: a single busy week that widens the ratio temporarily isn't the signal. Everyone has stretches where a genuine crunch delays even the easy stuff. The signal is a sustained shift in the baseline that doesn't correct itself once the busy stretch passes — that's the difference between ordinary variance and an early warning worth acting on.
Takeaway
Stop asking yourself how you're doing and start measuring how long the easy decisions sit. Track your decision latency for two weeks to establish a baseline, then re-check it quarterly. A widening gap is the most reliable early signal you'll get — often months before anything else confirms it.
Burnout is easier to catch in a number than in a feeling, because the number doesn't perform "fine" the way you do. Build the habit of checking it before you need the answer, not after.
