Chronic Lateness in ADHD: Why We Are Always Late

I start getting ready an hour ahead. I am late anyway.

For years I read this sentence as a character flaw. From the outside there is only one thing to see: not caring. From the inside the picture is completely different, and after the diagnosis this was one of the subjects that brought me the most relief.

By relief I do not mean throwing off responsibility. On the contrary, once I understood the mechanism, it turned into something that could be worked on.

Two causes

The first: the wrong calculation. The planning fallacy described by Buehler and colleagues (1994) is present in everyone. People systematically underestimate how long a task will take. In ADHD this deviation is more marked.

But the real issue is more concrete. Most people calculate the travel time and do not calculate the preparation time. A ten-minute journey does not mean a ten-minute departure: shoes, jacket, looking for keys, locking the door, going back to get something. The real time is often double.

For me the place where this calculation slips most is the keys. My father was also someone who looked for his keys every morning; watching that scene as a child, I did not know that one day I would do the same. The search time is not inside any plan, because each time you act on the assumption "I will find them this time."

The second: the last task. Starting a small task with five minutes left before leaving. Putting a dish away, answering a message, watering the plant.

This task does not take five minutes, it takes fifteen. And once started it is hard to drop, because difficulty with transitions kicks in.

The reason for being late is not delaying leaving. It is trying to fit in one more task before leaving.

The time blindness part

In Barkley's (1997) model, being able to feel time from the inside is treated as part of executive functions. When this area is strained in ADHD, the flow of time is not felt.

In practice it looks like this: a feeling of "I still have time," an estimate produced without looking at the clock, and that estimate is usually wrong. In the glossary: time blindness; the detailed version is in the article on what time blindness is.

There is also the reverse: some people are chronically far too early. That is another solution to the same problem. The fear of being late is made up for by leaving excessively early, and this second state is tiring too; it is a form of masking. I am someone who swings between the two: I arrive far too early to an important meeting and I am late to an ordinary meet-up. What makes the difference is not the clock but the anxiety the occasion produces in me.

The hidden cost of lateness

The price of being late is not only the minutes you are late. The real burden is what you carry before and after.

Before: a day with an appointment eats all the hours before that appointment. If I have a meeting at eleven in the morning, from nine on I cannot properly start any work, because my mind keeps busying itself with the clock.

After: every time you are late, you carry an apology, an explanation and usually some shame. Over time this accumulation pushes a person away from invitations. This is the quietest harm of chronic lateness.

The routine that works

Write it backwards. Calculate backwards from the arrival time and write the departure time somewhere:

• Appointment: 14.00
• Arrival: 13.50
• Travel: 30 minutes → Departure: 13.20
• Preparation: 20 minutes → Start preparing: 13.00

Writing this calculation instead of doing it in your head brings the estimate closer to reality. When it is done in the head, the preparation step is almost always erased.

Set the alarm to the departure, not to the appointment. A reminder set to the appointment time does not work. The alarm should be set to the time you need to go out the door, and a second alarm to the time to start preparing.

Do not start any task before leaving. This single rule removes most lateness. Write down the task that comes to mind and do it when you are back. What worked for me was putting a piece of paper by the door: everything that occurs to me before leaving is written there and none of it is done.

Prepare everything the night before. Bag, clothes, keys, papers. Most of the decisions to be made in the morning are erased here. The details are in the article on the end-of-day shutdown; the morning's own routine is in the article on the morning routine in ADHD.

Set up an entry point. Keys, wallet and card in one single place. The time spent searching is one of the quiet causes of lateness. In the glossary: entry point.

Fill the waiting time in advance. What makes arriving early unbearable is waiting empty. When you have a book, a podcast or a small task to do with you, arriving early becomes bearable and the resistance to leaving early drops.

Make it easy to let someone know. Sending a message the moment you realize you will be late wears you down far less than apologizing when you arrive. What delays it is usually shame: waiting with "maybe I will make it," and ending up both late and having not told anyone. The rule I set for myself is this: if my estimated arrival time is after the appointment, I write before I even set off.

Measure for a week. For a week, write down how long preparation and travel really take. The numbers that come out will be larger than your estimates, and those numbers will make all your future plans realistic. In the glossary: time estimation.

Three common mistakes

Setting the clock forward. Setting the wall clock ten minutes ahead rarely works, because you know the real time and the mind automatically subtracts the difference.

Expecting a single rescuing method. In this area a single intervention is not enough. Writing the departure time, setting the alarm to it and not starting the last task work together; when one is missing, the other two collapse as well.

Trying to get through a bad day with the same plan. On a sleepless morning preparation time gets longer. Moving the departure time earlier, knowing this, is the only way not to be late that day. Writing the bad-day version in advance means you do not have to decide that morning.

Explaining lateness with a single cause. Blaming traffic, the weather or that morning's mishap feels easy. When you keep records for a week, you see that the only variable that does not change is your own preparation time, and that is exactly the place that can be fixed.

One more thing that needs saying

Chronic lateness creates serious wear in relationships, and that is real. When the other person is waiting, what the explanation is does not change anything for them.

So here two things need to be done at once: understanding the mechanism and still taking responsibility. An explanation does not stand in for an apology. The review by Barkley and colleagues (2008) shows how wide an area the effects of ADHD on daily functioning cover; this knowledge is not an exemption certificate, it is a repair plan.

Also, to be honest, once a system is in place, lateness drops markedly. The single thing that made the most difference for my own productivity was writing down the departure time. A written time always turns out to be more reliable than a felt time.