ESA for Pulmonary Fibrosis: How to Describe Your Limitations on the WCA
Updated June 2026 - Based on current WCA descriptor framework
Pulmonary fibrosis is the progressive scarring of the lungs. As the scar tissue builds up, the lungs become stiff and cannot transfer oxygen efficiently, so even gentle activity leaves you breathless. People with pulmonary fibrosis often live with a dry, persistent cough, deep fatigue and, as the condition advances, a need for supplemental oxygen. The breathlessness on minimal exertion overlaps with other lung conditions such as COPD and bronchiectasis, so describe every activity it limits.
The Work Capability Assessment (WCA) does not ask "do you have pulmonary fibrosis?" - it asks how your condition affects your ability to perform 17 specific work-related activities. To be found to have Limited Capability for Work (LCW), you need 15 points across all 17 activities combined. For the Support Group (LCWRA in Universal Credit), you need to meet at least one Support Group route, which is separate from the points total.
Which WCA Activities Does Pulmonary Fibrosis Affect?
Because breathlessness sets a hard limit on physical exertion, pulmonary fibrosis tends to affect the activities that involve moving and sustaining effort. The key ones to focus on are:
- Mobilising - this is usually the most important activity. Breathlessness limits how far you can walk on level ground before you have to stop, and how soon you can start again
- Standing and sitting - staying upright and moving between positions over a working day can be exhausting when every effort uses up your breath
- Initiating and completing personal action - fatigue and low oxygen can stop you starting and finishing everyday tasks reliably
- Reaching - lifting the arms above shoulder height raises the work of breathing and can leave you short of breath
- Picking up and moving - carrying objects adds exertion that can be unmanageable when breathing is already at its limit
- Coping with the consequences of illness - severe breathlessness can be frightening, and anxiety about it can itself limit what you attempt
Remember, points from ALL activities are added together. A strong score on mobilising plus points on standing and sitting and personal action can take you past 15, and physical and mental descriptors add together.
How Pulmonary Fibrosis Maps to the WCA Descriptors
The WCA scores each of the 17 activities separately, but only the single highest descriptor you meet in each activity counts. Here is how pulmonary fibrosis typically maps across the relevant activities:
- Mobilising (Activity 1): being unable to mobilise more than 50 metres on level ground without stopping because of breathlessness can score 15 points, more than 100 metres scores 9, and more than 200 metres scores 6. The "repeatedly" wording matters - if you can manage the distance once but not again after a short rest, you should be scored at the lower distance.
- Standing and sitting (Activity 2): being unable to move between standing and sitting and remain at a workstation for the required period can add points.
- Initiating and completing personal action (Activity 13): if fatigue and breathlessness mean you cannot reliably start and finish tasks without prompting, this mental-function activity can add points that combine with your physical score.
For a full breakdown of the points attached to each level, see our WCA descriptors explained guide and the individual activity pages it links to.
Good Days, Bad Days and the Reliability Test
Pulmonary fibrosis is progressive, and breathlessness and fatigue vary from day to day and across a single day. You might manage a short walk first thing, then be exhausted and breathless for the rest of the morning. This is exactly what the WCA's reliability test is for.
To be counted as able to do an activity, you must be able to do it reliably, repeatedly, safely and within a reasonable time, for the majority of the time. If you can walk a short distance but then need several minutes to get your breath back and cannot repeat it, you cannot mobilise repeatedly. If exertion drops your oxygen levels, doing the task is not safe. The assessment should be based on your typical day, not your best moment.
How to Describe Pulmonary Fibrosis on the ESA50/UC50 Form
The biggest mistake claimants with pulmonary fibrosis make is describing their condition in medical terms rather than work-related terms. The WCA does not care about your diagnosis - it cares about what you cannot do reliably, repeatedly and safely in a workplace context.
When completing your ESA50 or UC50 form for pulmonary fibrosis, take each relevant activity in turn and put numbers and recovery times against it. Do not just write "I get breathless" - write that you can walk roughly 30 metres on the flat before you have to stop, that you then need five minutes to recover, that climbing the stairs at home leaves you unable to speak, and that any oxygen you use limits how far you can go from the house. Always picture an 8-hour working day, 5 days a week.
If you have a phone or video assessment, our guide on what to say at your WCA assessment and the phone assessment walkthrough explain how to put this across clearly.
Support Group (LCWRA) for Pulmonary Fibrosis
The Support Group, called LCWRA in Universal Credit, is for people whose health means they should not have to prepare for work at all. It is reached in one of three ways, not through the 15-point total:
- A Schedule 3 descriptor - for example, being unable to mobilise more than 50 metres on level ground without stopping because of significant discomfort or breathlessness.
- A single activity scoring 15 points - severe mobilising limits can reach the top descriptor in one activity on their own.
- The substantial-risk rule - under Regulation 35 of the ESA Regulations (Regulation 40 in Universal Credit), if being found capable of work or work-related activity would put your physical or mental health at substantial risk, you can be placed in the Support Group even without enough descriptor points.
The substantial-risk route can be important where exertion causes oxygen levels to fall, where infections are dangerous, or where the condition is advancing quickly. Read our detailed guides on the substantial-risk rule and how to qualify for the Support Group, and ask your respiratory team or GP to set out the risk in writing.
The Exertion Trap Across Several Activities
One of the most important points to get across about pulmonary fibrosis is that breathlessness is not limited to a single task. The same shortage of oxygen that stops you walking also affects standing for long, reaching up, carrying anything and even talking at length. Assessors sometimes treat each activity in isolation and conclude that you "only" have a mobilising problem, but the reality is that every physical demand draws on the same limited reserve, and the more you do, the less you can do next.
This matters because the WCA adds points across all 17 activities. If you describe only your walking, you may score well on mobilising but miss points you are genuinely entitled to elsewhere. Think through a normal working day and note each separate point where breathlessness or fatigue stops you: getting from a car park to a desk, standing at a counter, fetching and carrying, climbing a single flight of stairs, and recovering enough to do the next thing. Many people with pulmonary fibrosis also find that the effort of the morning leaves almost nothing for the afternoon, which is exactly the kind of pattern the assessment should capture.
Be specific about recovery. It is the recovery time, as much as the distance itself, that shows you cannot sustain effort over a working day. If a short walk to the bathroom leaves you needing to sit and catch your breath for several minutes before you can speak normally, say so, and say how many times that happens in a typical day.
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.
What could your ESA be worth?
For the official figures, see our free WCA points calculator and what ESA is and how much it pays.
Evidence to Support Your Claim
Strong evidence is crucial for a successful WCA. For pulmonary fibrosis, gather:
- Respiratory consultant or GP letters confirming the diagnosis and how it affects your ability to work
- Lung function test results, oxygen saturation readings and any walk-test results
- Prescription records, including antifibrotic medication, and home oxygen therapy records if you use oxygen
- Fit notes or med3 certificates
- Hospital, clinic and pulmonary rehabilitation appointment records
- A personal diary showing how your breathing and energy vary day to day
Ask your clinician to specifically mention how pulmonary fibrosis affects your ability to perform work-related tasks - walking, sustaining effort and recovering - not just the medical diagnosis itself. Our guide on the ESA medical evidence letter shows what to ask for, and the evidence checklist helps you make sure nothing is missing.
Get your WCA50 form wording right
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Try one activity free →Tips for Your WCA with Pulmonary Fibrosis
- Always describe limitations in work-related terms, not just medical symptoms
- Put figures against your walking - distance before you stop, and how long you need to recover
- Think about reliability - can you repeat the effort all day, or only once before you are spent?
- Explain any oxygen need and how it limits where and how far you can go
- Mention how a persistent cough and broken sleep add to daytime fatigue and concentration problems
- Describe your worst typical day, not your best
- Get supporting evidence that specifically mentions work-related limitations
What if You're Rejected?
Around 2 in 3 ESA mandatory reconsiderations result in a changed decision. If you score 0 points or are placed in the wrong group, you should challenge the decision. The most common reason for failure is not describing limitations in work-related terms - which is exactly what ESAexpert helps you with.
Read our guide on ESA mandatory reconsideration for step-by-step instructions, and the ESA tribunal guide if you need to take it further.
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
Can you get ESA for pulmonary fibrosis?
Yes, you can claim ESA or Universal Credit on the grounds of pulmonary fibrosis, but there is no automatic award for the diagnosis. The Work Capability Assessment looks at how the condition affects your ability to carry out 17 work-related activities, so a successful claim depends on showing that breathlessness on minimal exertion, a persistent cough and fatigue limit what you can do reliably, repeatedly and safely.
How many WCA points can pulmonary fibrosis score?
Pulmonary fibrosis most often scores on mobilising, because breathlessness limits how far you can walk, and on standing and sitting, with extra points where fatigue affects starting and completing tasks. You need 15 points in total across all 17 activities to be found to have Limited Capability for Work, physical and mental points are added together, and only the single highest-scoring descriptor in each activity counts towards your total.
How do I qualify for the Support Group with pulmonary fibrosis?
The Support Group (LCWRA in Universal Credit) is separate from the 15-point test. You can reach it by meeting a Schedule 3 descriptor for mobilising, by scoring 15 points on a single activity, or through the substantial-risk rule if work or work-related activity would put your health at substantial risk. A respiratory consultant or GP letter that explains this risk in writing carries real weight with the decision maker.
How should I describe breathlessness on the ESA50 form?
Describe what you cannot do rather than listing your diagnosis, and frame it around an eight-hour working day, five days a week. State how far you can walk on level ground before you have to stop for breath, how long you need to recover, and how a cough or low oxygen affects you. The assessment is based on what you can do the majority of the time, so make clear that bad days happen more than half the time if that is your reality.
What does the reliability test mean for pulmonary fibrosis?
To be counted as able to do an activity you must be able to do it reliably, repeatedly, safely and in a reasonable time, for the majority of the time. With pulmonary fibrosis, if you can walk a short distance once but then need several minutes to recover and cannot repeat it, you cannot do it repeatedly. You should be assessed on your typical day, including the effect of fatigue and any oxygen need, not on your best moment.
What evidence helps a pulmonary fibrosis ESA claim?
Useful evidence includes respiratory consultant or GP letters that link the condition to specific work-related limitations, lung function and oxygen results, prescription and oxygen therapy records, fit notes, hospital and clinic records, and a personal diary tracking how your breathing and energy vary day to day. Ask your clinician to describe the functional impact on tasks such as walking and exertion rather than simply confirming the diagnosis.
What if my ESA claim for pulmonary fibrosis is refused?
If you score too few points or are placed in the wrong group, you can challenge the decision by asking for a Mandatory Reconsideration, and then appealing to an independent First-tier Tribunal if it is still refused. The most common reason claims fail is describing the condition in medical terms instead of work-related terms, so a reconsideration is often where a weak first application can be turned around.