Why You Think Emails Take 10 Minutes

• You sat down to answer three emails. Gave yourself ten minutes. Looked up and thirty-five had gone by. You probably blamed yourself. Should’ve been faster, shouldn’t have opened that link, shouldn’t have rewritten the second paragraph twice. But the problem wasn’t speed. The problem was the estimate.

Kahneman and Tversky named this the planning fallacy back in 1979, and nearly fifty years of research since then hasn’t changed the number much: people underestimate how long tasks take by 25 to 40 percent, consistently, across every profession and skill level. Your brain pictures the best-case version. No rereading, no hunting for the right attachment. Just clean, uninterrupted output. That version doesn’t exist.

The uncomfortable part is that knowing about the planning fallacy doesn’t fix it. Reading this post won’t fix it either. The only thing that recalibrates your gut is seeing the gap between your estimate and reality, over and over, until the new number starts to feel obvious.

Vulpie AI, a desktop task planner for Mac and Windows, shows estimated and actual time side by side after every task. You put in 10 minutes, the timer says 35, tomorrow you put in 30.