WCA Activity 17: Appropriateness of Behaviour

Activity 17 of the Work Capability Assessment is "Appropriateness of behaviour with other people, due to cognitive impairment or mental disorder". It is the last of the seven mental, cognitive and intellectual function activities, and it is also one of the most powerful, because two of its descriptors score the full 15 points. For people with conditions such as PTSD, bipolar disorder, a personality disorder, a brain injury or some learning disabilities, it can be the activity that establishes Limited Capability for Work on its own. This guide explains what the activity measures, the exact descriptors and point values, how a real difficulty becomes a score, and how those points combine with the rest of the assessment.

The Work Capability Assessment is the test used for the health element of Universal Credit and for "new style" Employment and Support Allowance. It has 17 activities - ten physical and seven mental - and you reach Limited Capability for Work (LCW) by scoring 15 points across all of them combined. Points from physical and mental activities add together. The WCA is also under reform, with changes announced from 2025 onwards, so always check the current rules on GOV.UK before relying on a figure.

What Activity 17 is really asking

Activity 17 asks whether your behaviour towards other people is inappropriate because of a cognitive impairment or a mental disorder. Specifically, it looks at "uncontrollable episodes of aggressive or disinhibited behaviour that would be unreasonable in any workplace". Three things have to be true for an episode to count.

• It is uncontrollable. You cannot stop or hold back the behaviour. Conduct you choose, or could choose to suppress, does not count. The behaviour has to be driven by the condition.
• It is aggressive or disinhibited. Aggression can be physical or verbal. Disinhibited behaviour means a loss of the normal filters on speech and action - impulsive, shocking or socially inappropriate conduct you would not normally do.
• It would be unreasonable in any workplace. The yardstick is the workplace. An episode that no employer could be expected to tolerate from anyone is "unreasonable in any workplace".

The activity then grades how often these episodes happen - daily, frequently, or occasionally - and the points follow from the frequency.

The Activity 17 descriptors and their exact point values

These are the descriptors as written in Schedule 2 of the Employment and Support Allowance Regulations 2013. Only the single highest-scoring descriptor you meet counts towards your total.

17(a) and 17(b) - 15 points: daily or frequent episodes

This activity is unusual because two descriptors carry the maximum 15 points. If you have uncontrollable aggressive or disinhibited episodes on a daily basis you meet 17(a); if they happen frequently, but not quite every day, you meet 17(b). Either way the score is 15 points, which is enough on its own to establish Limited Capability for Work without any other activity. The practical effect is that "daily" and "frequent" are treated the same for points, so you do not need to prove every-single-day frequency to reach the top score.

17(c) - 9 points: occasional episodes

If uncontrollable aggressive or disinhibited episodes happen only occasionally, you meet 17(c) and score 9 points. "Occasionally" sits below "frequently" but is still meaningful - a handful of episodes over a period rather than a one-off. Nine points is a strong building block that combines with points from other activities towards the 15-point threshold.

A worked example: how a difficulty maps to points

Points only make sense when you see how a real difficulty turns into a descriptor. The figures below are not invented - they are the descriptor points written into Schedule 2.

Consider someone with a traumatic brain injury and emotional dysregulation. Several times a week, with little or no warning, they lose control and shout, swear and slam things when overwhelmed by noise or pressure. They cannot stop it once it starts and feel ashamed afterwards. This happens frequently, though not every single day.

• Activity 17: because they frequently have uncontrollable episodes of aggressive or disinhibited behaviour that no workplace could reasonably tolerate, they meet descriptor 17(b) and score 15 points. That alone meets the LCW threshold.
• Activity 13 (coping with change): the same dysregulation means an unplanned change triggers a severe reaction, which can add 6 to 15 points on whichever descriptor fits.
• Activity 16 (coping with social engagement): if shame and the fear of an outburst make face-to-face contact with strangers impossible most of the time, that activity can add points too.

This person clears 15 points on Activity 17 by itself, and the additional activities reinforce the wider picture for a Support Group or substantial-risk argument. Understanding the activity in depth shows why frequency, not severity alone, is what unlocks the top score.

The reliability test applied to Activity 17

The central principle of the Work Capability Assessment is that you must be able to do an activity reliably, repeatedly, safely, in a reasonable time, and for the majority of the time. For most activities the question is whether you can perform a task. For Activity 17 the angle is slightly different: the question is whether you can be among other people without uncontrollable, inappropriate behaviour, day after day, in a real job.

• Repeatedly and for the majority of the time. You might hold it together for one short, calm assessment call. But could you keep that control across every shift, every week? If episodes recur frequently, you cannot behave appropriately repeatedly, and the descriptor frequency words ("daily", "frequently") map directly onto this idea.
• Safely. Aggressive episodes create a safety issue for you, your colleagues and others. If a workplace could not keep people safe around your episodes, "safely" is in serious doubt - which also feeds the substantial-risk argument.
• The good-day trap. An assessor cannot see an uncontrollable episode during a structured, low-stress consultation. The fact that you were calm on the call says nothing about how you are under real workplace pressure. Make that point explicitly.

When you write your form, tie the behaviour to this test. Do not just say "I have a temper". Say "I have uncontrollable episodes several times a week that I cannot stop and that no employer could tolerate, so I could not behave appropriately at work for the majority of the time".

Which conditions commonly score on Activity 17

Any condition that causes uncontrollable aggressive or disinhibited behaviour can score here. The most common include:

• Personality disorders - particularly where emotional dysregulation leads to impulsive, intense outbursts. See ESA for personality disorder.
• Bipolar disorder - where manic or mixed states bring disinhibition, irritability and impulsive behaviour. See ESA for bipolar disorder.
• PTSD - where hyperarousal and a heightened threat response trigger aggressive episodes. See ESA for PTSD.
• Brain injury and stroke - where damage affects impulse control and emotional regulation. See ESA for stroke.
• Autism - where sensory overload or distress can lead to meltdowns that look like, and may be, uncontrollable disinhibited behaviour. See ESA for autism.
• Schizophrenia and psychosis - where symptoms can drive unpredictable behaviour. See ESA for schizophrenia.

You do not need any specific diagnosis. The descriptor is about function and behaviour, not labels.

What evidence to gather

Uncontrollable episodes almost never happen during a calm assessment, so written evidence does the heavy lifting. Build it in layers:

• Mental health team letters. A psychiatrist, community psychiatric nurse, neuropsychologist or psychologist who has documented the behaviour gives the strongest support.
• GP records. Ask for a printout showing consultations, medication, referrals and any notes about aggression, agitation or disinhibition.
• A witness statement. A partner, parent or carer who sees the episodes can describe what you may not remember or recognise yourself, including frequency and what triggers them.
• An incident diary. Over a month or more, record each episode - date, what happened, the trigger, whether you could stop it and how you felt afterwards. This is what shows "daily", "frequent" or "occasional".
• External records. Police involvement, written warnings, exclusions, or A&E attendances tied to an episode all evidence that the behaviour would be unreasonable in any workplace.

Send copies, never originals, and keep a list of everything you submit.

Common mistakes on Activity 17

• Downplaying the behaviour out of shame. Many people minimise episodes because they are embarrassed. The assessment cannot score what you do not describe. Be honest about what happens.
• Assuming it must be physical violence. Verbal aggression and disinhibited conduct count too. You do not have to have hurt anyone.
• Calling it "just a bad temper". The test is "uncontrollable", so explain that you cannot stop it once it starts, which is different from losing your temper by choice.
• Underselling the frequency. Because both "daily" and "frequent" score 15 points, getting the frequency on the page matters. A diary helps.
• Relying on the assessment to show it. A calm consultation proves nothing about workplace pressure. Say so, and let witness evidence carry it.

How Activity 17 combines with other activities

Because physical and mental points are added together across all 17 activities, Activity 17 can either stand alone or reinforce a wider picture. Meeting 17(a) or 17(b) gives the full 15 points and establishes Limited Capability for Work by itself. Meeting 17(c) for 9 points needs only 6 more from anywhere else - perhaps coping with change or social engagement - to cross the threshold.

Reaching 15 points gives you Limited Capability for Work, which on Universal Credit means no requirement to look for work and on new style ESA means the Work-Related Activity Group, paid at £95.55 a week. To reach the higher Support Group (Limited Capability for Work-Related Activity, or LCWRA), paid at £145.90 a week, you need to meet a Schedule 3 descriptor or the substantial-risk rule. There is no Schedule 3 descriptor that directly mirrors Activity 17, so severe behavioural difficulty usually reaches the Support Group through the substantial-risk regulation - the argument that being required to attend a workplace would put you or others at substantial risk - rather than through the activity score alone. Our guide to the Support Group explains how that works.

The consultation, the decision and challenging it

Most assessments are now carried out by telephone or as a paper-based review, although a face-to-face appointment is still possible. For Activity 17 the format is itself relevant: an uncontrollable episode is unlikely to surface during a calm, structured call, so the report leans on what you and your supporters have written. Answer for your typical and worst days, not your calmest moment, and explain that real workplace pressure is nothing like a scheduled assessment.

After the assessment the DWP sends a decision. If you are refused, or awarded LCW but not the Support Group when you believe the substantial-risk rule should apply, you can challenge it. Ask for a copy of the assessment report and check it against what you said - mismatches are common and useful grounds. The challenge runs in two stages: first Mandatory Reconsideration, where you ask the DWP to look again, normally within one month, setting out which descriptors you meet and why; then, if needed, an appeal to the independent First-tier Tribunal, which includes a doctor and overturns many mental-health decisions because it can take the time to understand behaviour an assessor never witnessed.

Official sources

This guide reflects the official Work Capability Assessment rules. For the source material, see:

• GOV.UK - Employment and Support Allowance
• GOV.UK - Health conditions, disability and Universal Credit
• The Employment and Support Allowance Regulations 2013 (Schedule 2 - WCA descriptors)
• Citizens Advice - Employment and Support Allowance

Guidance only, not legal advice. Rules can change - always check GOV.UK for the latest.

Frequently Asked Questions

How much could your ESA be worth?

The amount depends on whether you reach the 15-point threshold for Limited Capability for Work, and whether you qualify for the Support Group (LCWRA). As a rough starting point, enter your main condition below to see the kind of figure a successful claim can reach. It is only an estimate - your real award depends on how the Work Capability Assessment scores your difficulties across the 17 activities.

For the official figures, see our free WCA points calculator and what ESA is and how much it pays.