Decision fatigue: why by evening you can’t even choose what to have for dinner

In the morning you easily handle work questions, but at 9 p.m. you spend twenty minutes scrolling through delivery apps and end up ordering the same thing as always. Or nothing at all. This state has a name — decision fatigue — and people are talking about it more and more: in the US, search interest in “decision fatigue” has grown roughly sixfold since 2022. But the popular theory has an uncomfortable side that the videos usually don’t mention. We’ll look at both.

What is decision fatigue?

It’s a state in which the more decisions you make during the day, the greater your exhaustion — physical, mental and emotional. Cleveland Clinic stresses that it’s an everyday phenomenon, not a disease.

Typical signs listed by Cleveland Clinic experts:

• putting off and avoiding choices — “I’ll decide tomorrow”;
• impulsive decisions — “whatever, let’s just go with this”;
• brain fog and irritability;
• regretting the choice you made;
• physical discomfort — headache, tension.

Why is it hard to choose even dinner by evening?

In short: by evening you’ve already made hundreds of small decisions, and the quality of the next ones drops. The best-known example is a 2011 Israeli study: among experienced judges, the share of rulings in favor of prisoners fell from about 65% to nearly zero within each session and jumped back to 65% after a food break.

But before you build your life around this, it’s worth knowing how solid the theory itself is. More on that in the members-only part. And we’ve put a map of your day’s decisions and a 7-day “autopilot” plan in the PDF for this article.