What strategies help me avoid overly aggressive early or late margins in ADHD
Many adults with ADHD experience what researchers describe as “timing swings,” meaning they may arrive extremely early to avoid being late or, at other times, chronically late despite their best intentions. These fluctuations often stem from how ADHD affects internal time perception, planning, and emotional regulation. A 2023 review in the International Journal of Environmental Research and Public Health found that adults with ADHD consistently misjudge how long tasks will take, showing broad deficits in time estimation and management. Similarly, a 2022 meta-analysis of perceptual timing confirmed that individuals with ADHD experience a faster internal clock and inconsistent timing accuracy, which can cause them to underestimate or overestimate how long things take.
According to NICE guideline NG87, ADHD frequently affects organisation, time management, and adherence to routines, and treatment should include psychoeducation, behavioural therapy, and environmental support. The NHS overview on adult ADHD also explains that challenges with planning and sequencing can make punctuality unpredictable. These insights highlight why ADHD brains can swing between rushing and over-preparing, both of which increase stress and reduce flexibility.
Understanding overly aggressive margins
Being extremely early often develops as a coping mechanism to avoid the shame or anxiety of being late. However, this “hyper-early” pattern can create its own stress, wasting time and reinforcing a sense of inefficiency. On the other side, habitual lateness can lead to frustration and self-criticism. Research on time perspective in ADHD, including studies in Brain Sciences and Frontiers in Psychology, suggests these extremes arise from executive-function deficits, reduced working memory, and difficulty predicting future states. When the brain struggles to sense time passing accurately, it may either overcompensate or miscalculate completely.
Strategies to build balanced timing
Clinicians recommend combining practical scheduling tools with CBT-style planning skills. Reverse scheduling or backward planning, as noted in NICE recommendations on ADHD management, helps individuals plan realistically by starting from the goal and calculating backward. For example, if an appointment begins at 2 p.m., you might work out that leaving at 1:30 p.m. allows enough time for travel, with a small 10-minute buffer for unexpected delays.
The CNWL Adult ADHD Service advises using written task lists, timers, and visual reminders to create external anchors for time. Similarly, Berkshire Healthcare NHS guidance recommends breaking tasks into smaller steps with mini-deadlines to reduce the risk of over-preparing or procrastinating. These supports translate time into visible, predictable actions and help regulate both early and late tendencies.
Evidence from a 2022 group CBT trial for adult ADHD showed that structured training in planning and scheduling significantly improved symptoms. Participants learned to assess timing more accurately and reduce extremes by setting consistent, manageable buffers rather than aggressive ones.
Key takeaway
For people with ADHD, maintaining balance between being too early and being late involves learning to trust structured time rather than emotional urgency. Evidence from NICE and the NHS supports the use of backward planning, realistic buffers, and external reminders to stabilise timing. By planning intentionally instead of reactively, adults with ADHD can avoid both extremes, arrive more consistently on time, and reduce the stress of unpredictable timing swings.
