What Is the DSM-5 Criteria for Adult ADHD? 

The DSM-5 adult ADHD criteria set out by the American Psychiatric Association provide the official diagnostic guidelines for identifying ADHD in adults. These criteria are used by clinicians worldwide to ensure that diagnoses are accurate, consistent, and based on recognised symptoms. 

While ADHD begins in childhood, the DSM-5 outlines how it can persist in adulthood and affect daily functioning. To meet the criteria, adults must show clear patterns of inattention and/or hyperactivity-impulsivity that interfere with social, academic, or work life. 

What is the DSM-5 Criteria for Adult ADHD? 

The DSM-5 criteria for adult ADHD require persistent symptoms of inattention and/or hyperactivity-impulsivity since childhood, present in multiple settings, and causing functional impairment. 

Inattention:  

At least five of the following symptoms (out of nine) must be present for at least six months, to a degree that is inconsistent with developmental level and negatively impacts activities: 

• Frequently makes careless mistakes 

• Often has difficulty sustaining attention 

• Does not seem to listen when spoken to 

• Fails to follow through on tasks 

• Struggles with organisation 

• Avoids or dislikes tasks requiring mental effort 

• Loses items necessary for tasks 

• Easily distracted 

• Forgetful in daily activities 

Hyperactivity and Impulsivity:  

At least five of the following symptoms must also be present: 

• Fidgeting or tapping 

• Difficulty staying seated 

• Feeling restless 

• Trouble engaging in quiet activities 

• Acts as if “driven by a motor” 

• Talks excessively 

• Blurts out answers 

• Struggles to wait their turn 

• Interrupts or intrudes on others 

In adults, symptoms may appear differently than in children; for example, restlessness may replace physical hyperactivity, and difficulty managing time or emotions may become more prominent. 

Clinical Evaluation Is Key 

Meeting the DSM-5 adult ADHD criteria requires a thorough clinical evaluation, including a review of personal history, symptom impact, and rule-outs for other conditions. Self-assessment tools can help start the conversation, but diagnosis must come from a trained professional. 

If you are considering an ADHD assessment, visit providers like ADHD Certify for personal consultations and expert-led diagnostic services.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to ADHD in adults.