What methods help me better estimate departure times in ADHD

PostedDecember 31, 2025

UpdatedDecember 31, 2025

ByMy Patient Advice

Author: Harriet Winslow, BSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

Adults with ADHD can improve departure timing and punctuality, but it usually requires combining insight into how ADHD affects time with structured, external supports and skills training. According to NICE guidance on ADHD and NHS advice for adults with ADHD, the most effective methods target three areas: time perception, executive-function difficulties and practical planning systems such as alarms, planners and reverse scheduling.

How ADHD affects time estimation and deciding when to leave

A 2023 narrative review in the International Journal of Environmental Research and Public Health found that adults with ADHD consistently struggle with time estimation and time reproduction, leading to difficulty judging when to begin tasks and why lateness is so common. A 2021 review in Brain Sciences described time perception as a “focal symptom” in adult ADHD, showing that many people perceive time as moving faster than it really does. This often results in underestimating how long it takes to get ready, travel or transition between tasks.

A 2022 meta-analysis on time perception in ADHD also found that adults with ADHD consistently misjudge intervals, reinforcing the idea that time distortion is a stable part of the condition rather than an occasional lapse. Together, these findings help explain why estimating departure times is so unreliable, even when someone knows the actual journey length.

Executive-function difficulties and planning ahead

Executive functions help us plan, prioritise and start tasks on time. In ADHD, these processes are often less efficient. A 2019 review on ADHD and time perspectives linked working memory, planning and inhibition problems to inaccurate time perception. Many adults with ADHD live with a shortened “time horizon”, where future events feel abstract until the last moment, making early preparation harder.

NHS information lists poor organisation, weak time management and difficulty switching between activities as common symptoms that directly affect deciding when to start getting ready and leave. This helps explain why people with ADHD often start preparing too late, misjudge how long each step will take or become distracted before leaving.

Strategies that improve departure timing

Clinical and NHS-aligned resources highlight several methods that make departure planning more consistent and predictable.

CBT-based time-management programmes help adults with ADHD improve awareness of time, plan tasks in steps and overcome procrastination. A 2022 randomised controlled trial found that group CBT targeting time management significantly reduced ADHD symptoms and improved scheduling skills.

External time cues are another cornerstone of ADHD-friendly travel planning. Resources such as ADD.org and NHS adjustment guides recommend using multiple alarms, visual timers and visible clocks to make time more tangible. “Chain of event” alarms such as “start getting ready”, “leave soon” and “leave now” can help bridge timing gaps and reduce last-minute stress.

Reverse scheduling is also highly effective. Working backwards from a fixed time such as an appointment or meeting and including time for preparation, travel and a small buffer helps reduce lateness without requiring excessive earliness. NHS guidance, such as the Berkshire Healthcare ADHD workplace guide, encourages realistic planning windows and daily use of calendars and reminders.

Time-tracking exercises where you estimate the duration of daily tasks, then check actual times, can gradually train your internal clock. Over time, this practice helps calibrate how long it truly takes to prepare and leave on time.

NICE and NHS guidance on organisation and planning

NICE guideline NG87 emphasises that ADHD treatment should include psychoeducation, medication where appropriate and CBT-style interventions to strengthen organisation and time management skills. NHS workplace and support resources, such as the Adult ADHD Support Resource Pack, recommend using planners, reminder apps and structured routines to reduce last-minute rushing and improve punctuality.

Key takeaway

Accurately judging when to leave is one of the most consistent challenges for adults with ADHD, but it can improve with the right strategies. According to NICE and NHS guidance, the best results come from combining CBT-based skills training, external time supports such as alarms and calendars, and structured routines that make time visible and predictable. By planning backwards, timing daily tasks and practising consistent preparation habits, adults with ADHD can build more confidence and reliability in getting out the door on time.

Harriet Winslow, BSc

Author

Harriet Winslow is a clinical psychologist with a Bachelor’s in Clinical Psychology and extensive experience in behaviour therapy and developmental disorders. She has worked with children and adolescents with ADHD, autism spectrum disorder (ASD), learning disabilities, and behavioural challenges, providing individual and group therapy using evidence-based approaches such as CBT and DBT. Dr. Winslow has developed and implemented personalised treatment plans, conducted formal and informal assessments, and delivered crisis intervention for clients in need of urgent mental health care. Her expertise spans assessment, treatment planning, and behavioural intervention for both neurodevelopmental and mental health conditions.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy.

Dr. Rebecca Fernandez, MBBS

Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy.