What causes the “early or late” swing pattern in ADHD
Many people with ADHD find themselves caught between extremes, sometimes arriving far too early, and at other times, frustratingly late. This “early or late” swing is not simply about poor planning. It reflects deeper differences in executive function, time perception and motivation that shape how people with ADHD sense and respond to time. According to the NHS and NICE NG87 guideline, ADHD involves difficulties with organisation, planning and consistent time management, meaning that punctuality can vary widely depending on context, emotion and energy.
Why time feels unpredictable in ADHD
Research shows that people with ADHD often experience “temporal myopia”, a tendency to misjudge how much time is available or how long tasks take. A 2024 review of executive function in ADHD found that working-memory and cognitive-flexibility deficits make it harder to plan, monitor progress and adjust behaviour in real time. As a result, someone may overcompensate by over-preparing and arriving very early after being criticised for lateness, then relax their vigilance and swing back to being late once the urgency fades.
Studies from 2021 to 2023 in journals such as the Journal of Clinical Medicine and the Journal of Attention Disorders report measurable time-perception differences in ADHD, including inconsistent time estimation and delayed adjustment when plans change. These findings support the idea that punctuality depends on how strongly attention and emotion are engaged at a given moment.
Early vs late: emotional drivers and hyperfocus
According to the Mayo Clinic and the Cleveland Clinic, people with ADHD often alternate between hyperfocus, anxiety and procrastination. Hyperfocus can make them lose track of time, arriving late because attention is locked on another task. On the other hand, anxiety or perfectionism may trigger over-preparation, leading to being excessively early. This “all or nothing” cycle can shift daily, depending on motivation, mood and perceived importance of the event.
The dopamine connection
A 2024 review in Frontiers in Psychiatry highlights how altered dopamine signalling in ADHD affects motivation and timing. Low dopamine can make future rewards feel too distant, leading to procrastination, while high-stakes situations can trigger a surge of focus and urgency, resulting in early arrival. This helps explain why the same person can be punctual one day and entirely off schedule the next, as their brain’s reward and timing systems operate inconsistently.
Clinically supported ways to find balance
According to NICE NG87 and NHS guidance, effective ADHD management combines medication with structured routines, reminders and external time aids to create steadier patterns. Clinical experts at the Mayo Clinic and Cleveland Clinic also recommend CBT-based techniques to reduce procrastination and perfectionism, along with practical tools such as alarms, visual timers and realistic time buffers. These strategies help externalise time, turning invisible minutes into visible cues that support consistent action.
Key takeaway
The “early or late” pattern in ADHD is not about effort or carelessness; it reflects genuine differences in how time, emotion and motivation are processed. By understanding that this swing is rooted in neurobiology and self-regulation, people with ADHD can use medication, behavioural support and external structure to achieve greater consistency and reduce the stress of unpredictable timing.
