The four o’clock decision: why your afternoon choices are worse than your morning ones

By Sonja Cilliers and Maryke Swarts, PMRI · 12 September 2026

At nine in the morning a partner, whom we will call Johan, reads a settlement proposal, sees the problem in clause six within a minute, and sends it back with a note. At four in the afternoon the same partner reads a similar proposal from a different opponent, with a similar problem in a similar clause, and initials it. Nothing has changed except the hour and the two hundred or so decisions he has made in between: which email to answer first, whether to take the call, how to phrase a paragraph, whether the associate’s draft could go out as it stood, what to do about the client who wants a meeting, whether to eat lunch or keep going. None of these felt like decisions at the time. All of them were.

The same pattern runs through the whole building. The candidate attorney who was meticulous with the discovery index at ten sends a letter at half past four with the wrong date on it. The head of legal who pushed back hard on the indemnity in the morning meeting nods through a similar one in the afternoon call because the meeting is running late and everyone wants to finish. The advocate who was sharp in the morning’s argument accepts a formulation in the afternoon that she will regret when she reads the transcript. Decision fatigue is one of the better-documented effects in the study of how people work, and legal practice, with its unbroken stream of small choices carrying large consequences, is close to a perfect environment for producing it.

The mechanism

Every decision draws on the same executive resources, whether it is which matter to open, whether to answer an email now or later, how to phrase a sentence, or whether to accept an offer. The brain does not keep a separate account for important decisions. It has one account, held in the prefrontal cortex, and everything is drawn from it. By mid-afternoon, after several hundred small withdrawals, the account is low, and the mind starts doing what a tired mind does: taking the default, accepting the first plausible option, avoiding the choice altogether, or making it faster than the choice deserved.

The most striking evidence for this comes from a setting the profession will recognise. Danziger, Levav and Avnaim-Pesso (2011) analysed more than a thousand parole decisions by experienced judges and found that the proportion of favourable rulings was highest at the start of the day and immediately after a food break, and fell steadily as the session wore on, returning to its high point only after the next break. The judges were not aware of it. The cases were not different. What changed was the time since the judge had last rested, and the tired mind’s tendency to fall back on the default, which in that setting was to refuse. The study has been debated since, as good studies are, but the underlying pattern it describes, that decision quality drifts with time since a break, has held up across many other settings.

In legal work this shows up as the clause that was initialled, the email that was answered too quickly and had to be corrected, the offer that was accepted at five because it was there and the day needed to end, and the tendency of late-afternoon meetings to conclude with “let us leave it for now”, which is the tired mind’s way of not deciding at all.

What a firm sees

From the outside, decision fatigue looks like inconsistency. The same person is careful in the morning and casual in the afternoon, and colleagues learn, without quite putting it into words, to bring the difficult questions before lunch and the requests for sign-off after three. Errors cluster late in the day. Redrafts are disproportionately of afternoon work. The associate who is described as “brilliant but erratic” is, on inspection, brilliant until about two o’clock. The firm treats all of this as character, and in doing so misses the fact that it is scheduling, and that scheduling can be changed.

Protecting the decisions that matter

The first move is to put the decisions that carry consequence in the morning. Settlement calls, the opinion on the difficult point, the conversation with the client about strategy, the review of the junior’s draft that is going to a court: these belong before the account has been spent. Routine work, correspondence, the tasks that need attention but not a fine weighing of consequence, belong in the afternoon. Many practitioners run their day precisely the other way round. They clear email first “to get it out of the way”, make a hundred small decisions before nine, and arrive at the important one at three with nothing left. Johan, once he saw the pattern in his own initialled clauses, moved settlement reviews to a fixed slot at half past eight and has not initialled a clause six since.

The second move is to reduce the number of decisions that do not matter. Every practitioner makes dozens of small choices a day that could be made once and turned into a rule: when email is read, in what order matters are attended to, what a standard letter looks like, what happens to a request that arrives after four. Each rule removes a decision from the daily account and leaves more for the ones that count. This is why senior people in many fields wear the same thing every day, and it is why the best-run practice groups have templates for everything that recurs. The template is a decision that has been made once, on a good morning, and does not need to be made again on a bad afternoon.

The third is to recognise the state. A practitioner who knows what four o’clock feels like from the inside, the slight impatience, the wish for the thing to be done, the readiness to accept what is on the page, and who knows that the initialled clause is a symptom of that state, can build in a check. Anything consequential done after three gets a second reading the next morning, before it goes out, if the deadline allows it. That single habit catches a large share of the afternoon’s errors, and it costs ten minutes a day.

For a partner or a head of legal, there is a fourth move that concerns other people. If the team’s afternoon decisions are worse, then the afternoon is the wrong time to ask the team for decisions. The four o’clock meeting that ends in “let us leave it for now” would have ended in a decision at ten. Scheduling the meetings that matter for the morning, and keeping the afternoon for the meetings that merely report, is a leadership decision that improves the quality of everyone else’s decisions at once.

And the account is replenished, as the parole study suggests, by food, by rest and by short breaks in which no decisions are being made. A lunch eaten at the desk while triaging email is not a break in this sense, because the deciding never stopped. Twenty minutes away from the desk, with nothing to be chosen, does more for the four o’clock clause than any amount of resolve to concentrate harder.

PMRI’s High-Performance Productivity for Legal Professionals webinar covers this in detail, with a daily structure that puts the important decisions where the brain can still make them, and the Ultimate Time Management Course for Legal Professionals takes the same principles into a full online programme built around a legal diary. For firms and legal departments, the in-firm sessions on decision-making under load look at the same question at the level of the team: where the decisions are being made, when, and by whom. All are developed jointly by a behavioural specialist and an advocate with 27 years in practice. If you would like to talk about what this looks like in your firm, start a conversation with us. The first one is at no charge.