THE IDEA
Rearview mirror vs windscreen
A lagging indicator tells you what already happened. Revenue, profit, customer churn, exam results, health outcomes - these are all results. They’re accurate, concrete, and completely backward-looking. By the time a lagging indicator moves, the events that caused the movement are already in the past. You’re driving by looking in the rearview mirror.
A leading indicator tells you what’s likely to happen. Pipeline activity, employee engagement, early customer behaviour, appointment bookings, training completion rates - these are signals that precede results. They’re less precise, harder to measure, and immensely more useful for decision-making, because they give you time to respond before the result arrives.
Most organisations, teams, and individuals track lagging indicators almost exclusively. Quarterly revenue. Annual performance reviews. End-of-year exam results. These tell you how you did. They tell you nothing about how you’re about to do. The organisation that waits for the revenue number to decide something is wrong is like the driver who waits to hit the wall before turning the steering wheel.
IN PRACTICE
Looking through the right window
A company tracks revenue monthly (lagging). Revenue drops in March. The leadership team investigates and discovers that the sales pipeline shrank in January, which happened because the marketing campaigns underperformed in November. The problem is four months old by the time the lagging indicator reveals it. If they’d been tracking pipeline activity (leading), they’d have seen the problem in January and had two months to respond before it hit revenue.
A person tracks their weight (lagging). It goes up over three months. They investigate and realise they’ve been eating more, exercising less, and sleeping poorly. All of those are leading indicators that could have been tracked in real time. By the time the weight changed enough to notice, the behavioural patterns had been established for weeks. Tracking the leading indicators - meals, activity, sleep - would have caught the drift much earlier.
A school tracks exam results (lagging) and is surprised by a drop. Tracking leading indicators - homework completion rates, lesson engagement, attendance patterns - would have shown the decline forming months before the exams. The leading indicators are noisier and less definitive. But they’re actionable in time. The lagging indicators are precise and useless for prevention.
WORKING WITH THIS
Building your forward view
For any important outcome you track, ask: what would change before this changes? The answer is your leading indicator. If revenue is the outcome, pipeline and conversion rates are the leads. If health is the outcome, behaviour and biomarkers are the leads. If team performance is the outcome, engagement and collaboration quality are the leads.
Leading indicators are harder to measure and less satisfying. They’re noisier. They don’t give you the clean, definitive story that lagging indicators do. But they give you the one thing lagging indicators can’t: time. Time to respond, adjust, and intervene before the result is locked in.
Track both, but make decisions on the leading ones. Use lagging indicators to calibrate and validate. Use leading indicators to steer. The ideal measurement system gives you a clear view backward (so you understand what happened) and a fuzzy but directional view forward (so you can influence what happens next).
THE INSIGHT
The line to remember
A lagging indicator tells you the horse has left the stable. A leading indicator tells you the gate is open. Both are true. Only one gives you time to act.
RECOGNITION
When this is in play
You need leading indicators when you’re always reacting to bad news that’s already baked in. When quarterly reviews produce surprises that could have been anticipated. When the data is always accurate but always too late. When the question “how are we doing?” can only be answered with “we’ll know in three months.” When a decline appears sudden but turns out to have been building for a long time - the leading indicators were there, they just weren’t being watched.