ESA Evidence Checklist - What Evidence to Submit for Your WCA Claim

Updated May 2026

Strong evidence is the single biggest factor in a successful WCA claim. The DWP makes decisions based on evidence, and the more specific, recent, and relevant your evidence is, the better your chances.

Essential Evidence

• GP letter - Ask your GP to write a letter specifically addressing how your conditions affect your ability to work. The letter should mention: diagnosis, severity, prognosis, treatment, medication and side effects, and specific limitations in a work context.
• Specialist letters - Letters from consultants, psychiatrists, rheumatologists, neurologists, pain clinics, or any specialist you see. Hospital discharge summaries and clinic letters are valuable.
• Fit notes (Med3) - If your GP has issued fit notes stating you are "not fit for work," these support your claim.
• Prescription records - A list of all medication showing doses and duration. This demonstrates the severity of your conditions and provides evidence of side effects.

Additional Evidence

• Therapy or counselling records - Letters from therapists, psychologists, or counsellors
• Community mental health team records - If you are under a CMHT, their reports are highly valued
• Occupational therapy reports - These specifically address functional capability
• Social worker reports - If you have a social worker, their assessment of your needs is relevant
• Care plan or support plan - Documents showing what help you receive and why

Personal Evidence

• Pain or symptom diary - A 2-4 week diary showing daily symptoms, pain levels, what you could and could not do each day, and how your condition varies
• Statement from someone who knows you - A partner, carer, family member, or friend who sees your daily limitations can write a supporting statement - see our full guide to the carer's statement for ESA
• Photos - If your condition has visible effects (swelling, skin conditions, mobility aids, home adaptations), photos are evidence

How to Ask for Evidence

When asking your GP or specialist for a letter, be specific about what you need. Say: "I am applying for ESA and need a letter that explains how my conditions affect my ability to work. Please mention which of the 17 WCA activities my conditions affect, and whether you believe work-related activity would pose a substantial risk to my health."

Many GPs will charge a fee for a supporting letter (typically £20-50). This is worth the investment - good medical evidence significantly improves your chances.

When to Submit Evidence

Submit evidence at every stage: with your initial ESA50/UC50 form, with any mandatory reconsideration, and at any tribunal. New evidence can be submitted at any point and is often the deciding factor.

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

Why Evidence of Function Beats Evidence of Diagnosis

The Work Capability Assessment does not score your diagnosis. It scores your function - what you can and cannot do across 17 activities, with 15 points in total meaning you have limited capability for work. Physical and mental activities are added together, and within each activity only the single highest descriptor that applies counts. This is the key to understanding what makes evidence strong or weak.

A letter that says "Mr Jones has chronic obstructive pulmonary disease and depression" confirms two diagnoses and scores nothing on its own. A letter that says "Mr Jones becomes breathless after about 30 metres on level ground and cannot repeat the effort without prolonged rest, and his depression means he cannot reliably engage with unfamiliar people on most days" speaks directly to the descriptors for mobilising and for coping with social engagement. The second letter is worth far more, even though it describes the same person. When you gather or request evidence, your goal is always to move it from the diagnosis column into the function column.

A Worked Example: Turning Evidence Into Points

Imagine you have rheumatoid arthritis affecting your hands and you also experience severe fatigue. Two activities are obviously in play.

On "Picking up and moving or transferring by the use of the upper body and arms", and on "Manual dexterity" (which covers using a pen, pressing buttons, and turning pages or taps), the descriptors range from 0 to 15 points depending on how restricted you are. If your specialist's letter states that morning stiffness means you cannot grip a pen or use a keyboard for the first few hours of most days, and that swelling makes single-handed tasks unreliable, that evidence supports a mid-to-high manual dexterity descriptor.

On the fatigue side, "Mobilising" and the reliability test interact. If a fit note and GP letter confirm that fatigue limits how far and how often you can walk, and that you could not repeat an effort across a working day, the evidence supports the mobilising descriptors being read with the repeatability rule in mind. Because physical scores combine across activities, two pieces of well-written evidence describing two different functional problems can together carry you past the 15-point threshold. This is why a focused letter that names the activity it relates to is so much more useful than a general one.

Write Evidence Around the Reliability Test

The single most useful instruction you can give anyone writing your evidence is to address the reliability test. An activity only counts as something you "can" do if you can do it reliably, repeatedly and safely, in a reasonable time, and for the majority of the time. Ask your GP, specialist or support worker to describe your limitations in those exact terms:

• Reliably - to an acceptable standard, not just barely scraping through.
• Repeatedly - again and again across a working day, not just once.
• Safely - without risk of falls, seizures, collapse or harm.
• In a reasonable time - not taking many times longer than most people would.
• Majority of the time - on most days, given how your condition fluctuates.

A line such as "On the majority of days Mrs Patel cannot prepare a simple meal safely because dizziness creates a real risk of burns or falls" is precisely the kind of sentence a decision maker can act on, because it ties a symptom to a descriptor and to the safety limb of the reliability test in one go.

Evidence for the Support Group and the Substantial-Risk Route

If you are aiming for the Support Group (LCWRA on Universal Credit), your evidence needs to do a particular job. You reach the Support Group by meeting one of the Schedule 3 descriptors, by scoring 15 points on a single activity that is also a Schedule 3 descriptor, or through the substantial-risk rule - Regulation 35 of the ESA 2008 Regulations, Regulation 31 of the new-style ESA 2013 Regulations, or Regulation 40 of the UC Regulations.

The substantial-risk route is where targeted evidence is most powerful. It applies where being found capable of work or work-related activity would create a substantial risk to your physical or mental health, or to others. A letter from a psychiatrist or community mental health team stating clearly that the demands of work-related activity would cause a serious deterioration in your mental health, or that there is a genuine risk of self-harm, speaks directly to this rule. Reports from a social worker, occupational therapist or crisis team that describe ongoing risk and the level of support you need are also valuable. Generic letters rarely engage with the substantial-risk question, so it is worth asking explicitly for it to be addressed.

Who to Ask and How to Ask Them

Different sources are good for different things, and knowing who to approach saves time and money.

• Your GP - best for an overview of your conditions, medication and side effects, and how they affect day-to-day function. Many practices charge a fee, typically around £20-50, for a private supporting letter, because this is not NHS work.
• Specialists and consultants - best for severity and prognosis in their area. Clinic letters and discharge summaries you already have can often be photocopied at no cost.
• Community mental health teams and care coordinators - their notes carry real weight for mental health activities and the substantial-risk rule.
• Occupational therapists and physiotherapists - they write naturally in functional terms, which is exactly what the WCA needs.
• A person who knows you well - a partner, carer or friend can write a short statement describing what they actually see you struggle with day to day.

When you ask, be specific. A request like this works well: "I am being assessed for ESA under the Work Capability Assessment. Please could you write a letter explaining how my conditions affect my function, referring where you can to the relevant WCA activities, describing what I cannot do reliably, repeatedly and safely on most days, and stating whether you believe work-related activity would pose a substantial risk to my health." Giving the writer that framing produces a far more useful letter than simply asking for "a letter for my benefits."

Common Evidence Mistakes to Avoid

• Sending only diagnosis letters. They prove you are ill but not how it limits you. Pair them with something functional.
• Submitting a huge undigested bundle. Quality beats quantity. A short, relevant set of documents is easier for a decision maker to use than 80 pages they have to wade through.
• Relying on out-of-date letters. Evidence more than a year or two old can be dismissed as no longer current. Refresh the key documents.
• Forgetting medication side effects. Drowsiness, brain fog, tremor and nausea are themselves limiting and should be in your evidence.
• Not describing fluctuation. If your condition varies, a symptom diary over two to four weeks shows the pattern and supports the majority-of-the-time test.
• Leaving evidence to the last minute. If a letter is delayed, send what you have and add the rest later rather than missing a deadline.

How Evidence Works Through the Appeal Stages

Evidence is not a one-off submission. It feeds every stage of the process. With your initial ESA50 or UC50 form, send everything that is ready. If the decision goes against you, a Mandatory Reconsideration is your chance to fill the gaps the assessor relied on - this is often where a new, targeted letter changes the outcome. If the reconsideration still fails, you can appeal to an independent First-tier Tribunal, and tribunals are well known for placing real weight on good written evidence and on a claimant's own consistent account.

You can add evidence at any point, so a letter that arrives after you have submitted your form is not wasted. Keep copies of everything and a note of the date you sent each item. Because the difference between outcomes is significant - for new claims in 2026/27 the Support Group brings ESA to around £145.90 a week against roughly £95.55 a week in the work-related activity group - the time and small fees involved in assembling strong evidence are usually a worthwhile investment.

Related Guides

• Complete WCA guide
• How to fill in the ESA50 form
• Mandatory reconsideration guide
• How to qualify for the Support Group
• What to say at your WCA assessment
• Carer's statement for ESA