PIP Supporting Evidence Letter (UK): Sample Letters & Guide

What Is a PIP Supporting Evidence Letter?

A PIP supporting evidence letter is a clinical document written by a healthcare professional — including psychologists — to provide evidence supporting a patient's application for Personal Independence Payment (PIP). PIP is a UK government benefit for people aged 16 to state pension age who have a long-term physical or mental health condition or disability that affects their ability to carry out daily living activities or get around. This guide explains what supporting evidence the DWP actually finds useful and includes two complete, filled-in sample letters — one from a clinical psychologist for a client with severe depression, and a shorter example from a community psychiatric nurse for a client with PTSD — that you can model your own letter on.

Eligibility basics to keep in mind when writing:

• PIP is for people aged 16 to under State Pension age with a long-term physical or mental health condition — difficulties must have lasted, or be expected to last, at least 12 months. Your letter should address duration and prognosis for this reason. See GOV.UK — PIP eligibility.
• Scotland: residents apply for Adult Disability Payment (ADP) through Social Security Scotland, not PIP. The functional-evidence principles in this guide still apply, but the process and forms differ.
• Northern Ireland: PIP in Northern Ireland is administered separately with its own guidance.

PIP is assessed through a points-based system across two components: daily living and mobility. Each component has a set of specific activities (such as preparing food, managing therapy or monitoring a health condition, making budgeting decisions, and planning and following journeys). The DWP assessor assigns points based on how much difficulty the claimant has with each activity. To receive PIP, the claimant must score a minimum number of points — 8 for the standard rate and 12 for the enhanced rate.

Your letter provides evidence that the DWP assessor uses alongside the claimant's self-report, the face-to-face assessment (if one occurs), and any other medical evidence. A well-written letter from a psychologist can be particularly valuable for PIP applications based on mental health conditions, because the functional impact of conditions like severe depression, PTSD, anxiety disorders, and psychotic disorders is often invisible and frequently underestimated in brief DWP assessments.

When You Need It

You will write a PIP supporting evidence letter when:

• A patient is making a new PIP claim and requests clinical evidence to submit with their application
• A patient is undergoing a PIP review (also called a "planned review" or "award review") and needs updated evidence about their current functioning
• A patient is appealing a PIP decision through mandatory reconsideration or tribunal appeal, and needs additional evidence
• The DWP has requested further evidence from the patient's healthcare professionals as part of the assessment process
• A patient's condition has changed and they are reporting a change of circumstances to the DWP

What Supporting Evidence Helps a PIP Claim?

Before looking at the sample letters, it is worth being clear about what the DWP actually treats as useful supporting evidence — because much of what claimants submit (and much of what clinicians instinctively write) misses the mark.

Evidence that helps:

• Functional descriptions from a treating professional. The single most useful thing you can provide is a concrete account of how the condition affects the person's ability to carry out the 12 assessed activities — not the diagnosis, and not a medication list. Citizens Advice explicitly advises claimants that letters confirming a diagnosis add little; letters describing day-to-day functional impact add a lot.
• Evidence from any professional who knows the person's functioning. The DWP accepts evidence from a wide range of professionals — GP, psychiatrist, psychologist, CPN, care coordinator, occupational therapist, social worker, counsellor, or support worker. A counsellor who sees the person weekly often has better functional evidence than a GP who sees them twice a year.
• Quantified, concrete observations. "Showers 2 to 3 times per week," "has missed 6 of 42 scheduled sessions despite reminders," "has not used public transport independently for 6 months." Numbers drawn from your records are far more persuasive than adjectives.
• Documentation of fluctuation. Descriptions of good days versus bad days, and how many of each in a typical week, map directly onto how the DWP is required to assess variable conditions (see the reliability and majority-of-days rules below).
• Distinguishing observed from reported information. "She reports X, and this is consistent with my clinical observations across 42 sessions" is stronger than either alone, and shows the assessor you are being clinically careful.
• Care plans, appointment histories, and outcome measures. Existing records — PHQ-9/GAD-7 scores over time, attendance records, care plan summaries — can be submitted as copies alongside the letter.

Evidence that helps less than people expect:

• Diagnosis-only confirmation letters, repeat prescription lists, and generic "to whom it may concern" notes
• Letters that advocate the outcome ("she should receive PIP") rather than describing function
• Original documents — GOV.UK advises claimants to send copies, and notes that the DWP will contact professionals directly if it needs more information

Key Components / Requirements

Your Professional Details

Include your full name, professional title, HCPC registration number, and the name and address of your practice or NHS trust. The DWP needs to verify that the letter comes from a registered healthcare professional.

Your Relationship to the Patient

State clearly how long you have been seeing the patient, how frequently, and in what capacity (treating psychologist, assessor, NHS or private). The DWP gives more weight to evidence from professionals with an ongoing treating relationship than to one-off assessments.

Diagnosis and Clinical History

Provide the diagnosis or diagnoses, the duration of the condition, and a brief clinical history. Reference the diagnostic criteria used (ICD-11 or DSM-5-TR). State whether the condition is long-term or likely to be long-term — PIP is intended for conditions lasting at least 12 months.

Functional Impact — Daily Living Activities

This is the most important section. Describe how the patient's condition affects their ability to carry out daily living activities. The PIP daily living activities include:

• Preparing food — can they plan, prepare, and cook a meal?
• Taking nutrition — can they eat and drink?
• Managing therapy or monitoring a health condition — can they manage their medication, attend appointments, follow treatment plans?
• Washing and bathing — can they wash themselves independently?
• Managing toilet needs — can they manage continence independently?
• Dressing and undressing — can they dress themselves?
• Communicating verbally — can they express themselves and understand others?
• Reading and understanding signs, symbols, and words — can they read and process written information?
• Engaging with other people face to face — can they interact with others without overwhelming distress?
• Making budgeting decisions — can they manage money and make financial decisions?

Functional Impact — Mobility Activities

If the patient's mental health condition affects their mobility, describe this:

• Planning and following journeys — can they plan a route and follow it? Can they navigate unfamiliar places? Do they experience overwhelming anxiety or distress when travelling? Following litigation resolved in claimants' favour, psychological distress is relevant to this activity — a person who cannot undertake journeys because of anxiety, panic, or other psychological distress can score points here, so mental health evidence about journeys matters and should be as concrete as your daily-living evidence.
• Moving around — physical mobility is less commonly affected by psychological conditions, but severe depression, psychotic disorders, or medication side effects may be relevant.

Variability

Mental health conditions are inherently variable. If your patient can sometimes manage an activity but not reliably — for example, they can cook a meal on a good day but on most days their depression prevents them from getting out of bed — describe this variability clearly.

The Reliability Test and the Majority-of-Days Rule

Two assessment rules make variability evidence unusually valuable, and the Royal College of Psychiatrists highlights both in its guidance for mental health clinicians writing PIP evidence:

• The reliability test. A person only counts as able to do an activity if they can do it safely, to an acceptable standard, repeatedly (as often as reasonably required), and in a reasonable time. A patient who can technically cook a meal but takes three hours, leaves the hob on, or is then unable to do anything else for the rest of the day does not meet this test — say so, in those terms.
• The majority-of-days rule. A descriptor applies if it reflects the person's ability on more than 50% of days. This is why "she has approximately 2 better days per week; on the remaining 5 her functioning is as described" is such a powerful sentence: it tells the assessor directly which picture applies on the majority of days. A letter that describes only the worst days invites the assessor to discount it; a letter that quantifies the good-day/bad-day split does the assessor's required analysis for them.

Treatment and Prognosis

State what treatment the patient is receiving and its effectiveness. If the condition is treatment-resistant or only partially responsive to treatment, state this. The DWP needs to understand that PIP is not an alternative to treatment — it supports people whose conditions affect their functioning despite treatment.

Sample PIP Supporting Evidence Letters

The two filled-in examples below are entirely fictional. The first is a full letter from a clinical psychologist for a client with severe, treatment-resistant depression. The second is a shorter sample from a community psychiatric nurse for a client with PTSD, showing how the same principles apply to a briefer letter and to the mobility component.

How to Write It

Step 1: Understand the PIP assessment framework. Before writing, familiarise yourself with the PIP activities and descriptors. You do not need to reference the descriptors in your letter, but understanding what the DWP assessor is looking for allows you to frame your clinical evidence in the most useful way.

Step 2: Focus on function, not diagnosis. The DWP does not award PIP based on diagnosis — it awards it based on functional impact. A diagnosis of "severe depression" alone tells the assessor very little. Describing that the patient cannot prepare a cooked meal, showers only 2 to 3 times per week, and has not left the house independently in 6 months tells them everything they need.

Step 3: Be specific and concrete. Replace vague statements with specific, observable descriptions. Instead of "struggles with personal hygiene," write "manages to shower approximately 2 to 3 times per week and does not wash her hair more than once per week." Instead of "has difficulty with social interaction," write "has not seen friends in 8 months and is unable to sustain a conversation longer than 5 minutes without becoming overwhelmed."

Step 4: Address variability. Most mental health conditions fluctuate. Describe the range of functioning — best days, worst days, and typical days. The DWP applies the "reliability" test: can the person do the activity safely, to an acceptable standard, repeatedly, and in a reasonable time? If the answer is "sometimes but not reliably," explain this.

Step 5: Write factually and avoid advocacy. Your role is to describe what you have observed clinically and what the patient has reported to you. Do not tell the DWP what decision to make. Factual, clinical evidence from a registered professional carries more weight than an advocacy letter.

Step 6: Include your professional credentials. The DWP needs to verify that you are a qualified professional. Include your full name, title, HCPC registration number, and contact details.

Common Mistakes

• Writing about diagnosis without describing functional impact. A letter that says "Ms Tomlinson has severe depression and anxiety" without describing how these conditions affect daily activities is not useful for a PIP assessment.
• Using vague or subjective language. "Significant difficulties with daily living" does not help the DWP assessor assign points. Specify which activities are affected and how.
• Stating that the patient "should" receive PIP. This is not your decision to make and expressing this opinion can undermine the credibility of your evidence.
• Ignoring variability. If your letter describes only the patient's worst days, the DWP assessor may question its accuracy. Describing the range of functioning demonstrates clinical objectivity.
• Not addressing the long-term nature of the condition. PIP requires that the condition has lasted (or is expected to last) at least 12 months. If you do not address duration and prognosis, the assessor may question eligibility.
• Providing a generic letter. A letter that could apply to any patient with depression is less persuasive than one that describes this specific patient's functional limitations with concrete examples drawn from your clinical observations.
• Quoting descriptor wording or point values incorrectly. You do not need to cite descriptors at all, and getting them wrong (or citing outdated values) undermines an otherwise strong letter. Describe function in plain clinical language and let the assessor do the mapping.
• Sending original documents. Advise patients to submit copies of your letter and any supporting records, not originals — GOV.UK's guidance is to send copies, and the DWP will contact you directly if it needs more.

A Note on PIP Reform (as of August 2026)

Proposals in 2025 to tighten PIP eligibility — including a requirement to score 4 points in a single daily living activity — were removed from the legislation in July 2025 and are not law. The PIP assessment criteria described on this page remain unchanged pending the Timms Review, the first full review of the PIP assessment, which is due to report in autumn 2026. Check GOV.UK for the current position before advising patients about future changes.