No single list of medical conditions automatically qualifies you for ill health retirement. Instead, pension schemes assess whether your condition is severe enough to permanently prevent you from doing your job, and in some cases, any job. Cancer, heart disease, severe mental health disorders, neurological conditions like multiple sclerosis, and musculoskeletal problems are among the most common reasons people are granted ill health retirement, but the deciding factor is always the functional impact of your condition rather than the diagnosis itself.
The rules vary depending on whether you’re in a public sector scheme like the NHS Pension or the Local Government Pension Scheme (LGPS), a private occupational scheme, or claiming state disability benefits. Here’s how each system works and what level of severity is typically required.
How Eligibility Is Actually Decided
Ill health retirement isn’t triggered by having a specific condition on a checklist. It’s triggered by demonstrating that your condition makes you permanently incapable of doing the work you’re employed to do. An independent medical adviser appointed by your pension scheme reviews your case, looking at medical evidence, treatment history, and whether your condition is likely to improve. The core definition used across most UK pension schemes and disability systems is similar: a physical or mental impairment that has lasted, or is expected to last, for at least 12 months and prevents you from performing your duties.
This means two people with the same diagnosis can have different outcomes. Someone with multiple sclerosis who experiences mild, well-controlled symptoms may not qualify, while another person with MS whose condition causes significant fatigue, mobility problems, or cognitive difficulties could meet the threshold. What matters is how the condition affects your ability to work, not the name of the condition.
Physical Conditions That Commonly Qualify
The physical conditions most frequently seen in ill health retirement applications tend to fall into a few broad categories. Musculoskeletal problems, including severe chronic back pain, degenerative joint disease, and rheumatoid arthritis, are among the most common. These qualify when pain, stiffness, or loss of mobility makes it impossible to carry out your role even with reasonable adjustments.
Neurological and degenerative conditions like multiple sclerosis, Parkinson’s disease, and motor neurone disease often qualify because they progressively worsen. For MS specifically, Cleveland Clinic notes that disability assessments typically involve a functional capacity evaluation measuring what you can physically do, along with a mental capacity assessment if cognitive symptoms are present. Referrals to specialists like ophthalmologists may also be needed to document visual impairment.
Cardiovascular conditions such as severe heart failure, recurrent stroke, or advanced coronary artery disease can qualify when they limit physical exertion to a degree that rules out sustained work. Similarly, respiratory conditions like advanced COPD or pulmonary fibrosis, and cancers that are terminal, recurring, or have left lasting functional impairment after treatment, are regularly accepted.
Mental Health Conditions
Mental health conditions absolutely can qualify for ill health retirement, though the bar for severity is high. The key requirement across most schemes is that your condition must be severe, long-standing, and resistant to treatment.
The Social Security Administration’s framework for evaluating mental disorders gives a useful picture of what “severe enough” looks like in practice. For depressive disorders, documentation needs to show at least five characteristic symptoms: depressed mood, loss of interest in nearly all activities, significant appetite or weight changes, sleep disturbance, observable psychomotor changes, decreased energy, feelings of guilt or worthlessness, difficulty concentrating, or thoughts of death or suicide. For anxiety disorders, the threshold is three or more of: restlessness, being easily fatigued, difficulty concentrating, irritability, muscle tension, or sleep disturbance.
But having these symptoms documented isn’t enough on its own. Your condition must also cause “extreme” limitation in at least one area of mental functioning (understanding information, interacting with others, concentrating, or managing yourself) or “marked” limitation in at least two of those areas. Alternatively, you can qualify by showing a “serious and persistent” pattern, meaning a medically documented history of the condition spanning at least two years with evidence that you rely on ongoing treatment or support to function.
PTSD, bipolar disorder, schizophrenia, and severe obsessive-compulsive disorder are all evaluated using similar frameworks. The common thread is that the condition must substantially impair your daily functioning despite appropriate treatment.
NHS Pension: Tier 1 and Tier 2
The NHS Pension Scheme uses a two-tier system. Tier 1 ill health retirement applies if your NHS employment is terminated because of ill health, you have at least two years of scheme membership, and you’ve been determined to be permanently incapable of efficiently carrying out the duties of your NHS role due to physical or mental infirmity. A Tier 1 pension is paid without any reduction for retiring early, but it’s based only on the pension you’ve already built up.
Tier 2 is more generous and harder to qualify for. You must meet all the Tier 1 criteria and additionally be determined permanently incapable of engaging in regular employment of similar duration in the general field of work. In other words, Tier 1 means you can’t do your NHS job anymore, while Tier 2 means you can’t do any comparable job. If you joined the 2015 Scheme, your Tier 2 pension includes an enhancement on top of your accrued benefits.
LGPS: Three Tiers of Ill Health Retirement
The Local Government Pension Scheme has three tiers rather than two, each with progressively stricter criteria. All three require at least two years of scheme membership and that you are permanently incapable of carrying out your current job duties until your normal pension age.
Tier 1 applies when you are also unlikely to be capable of any gainful employment before your normal pension age. This is the highest level of benefit, and it includes an enhancement to your pension as if you had continued working to retirement. Tier 2 applies when you are not immediately capable of gainful employment but are likely to become capable of some work before your normal pension age. Tier 3 applies when you are likely to be capable of undertaking gainful employment within three years of leaving, or before your normal pension age if that comes sooner. Tier 3 benefits are temporary and are reviewed.
If you’re receiving a Tier 3 pension and your condition worsens, a further medical assessment can potentially upgrade you to Tier 2 benefits, which would then be paid for life. However, a Tier 3 pension cannot be upgraded directly to Tier 1.
Terminal Illness and Lump Sum Payments
If you have a terminal illness, a fast-track route exists. Under UK pension rules, a serious ill health lump sum can be paid if a registered medical practitioner provides written confirmation that you are expected to live for less than one year. This allows you to take your entire pension pot as a single payment rather than as a regular income.
The tax treatment of this lump sum depends on your age and when you receive it. If you are under 75, the payment counts against your lump sum and death benefit allowance, which stands at £1,073,100 for most people as of April 2024. Any amount within that allowance is tax-free. If the payment exceeds your remaining allowance, the excess is taxed at your marginal income tax rate. If you are 75 or over, only 25% of the lump sum counts toward the allowance, meaning a larger portion may be taxable.
How the Application Process Works
You don’t decide for yourself whether you qualify. Your employer typically initiates the process, though you can request it. An independent registered medical practitioner, appointed by your pension scheme and not your own GP or consultant, reviews your medical records, may examine you, and produces a report on whether you meet the scheme’s criteria. Your own doctors will be asked to provide supporting evidence, so having thorough, up-to-date records of your condition, treatments you’ve tried, and how your symptoms affect your daily life and work is essential.
The medical adviser considers whether your condition is permanent, whether all reasonable treatments have been explored, and whether reasonable workplace adjustments could allow you to continue working. “Permanent” doesn’t necessarily mean your condition will never change at all. It means that, on the balance of probabilities, you are unlikely to recover sufficiently to return to work before your normal pension age.
If your application is rejected, most schemes have an appeals process. This typically involves a second independent medical opinion. Gathering additional specialist evidence before appealing can strengthen your case, particularly if the initial assessment underestimated the functional impact of your condition.
Conditions That Are Harder to Prove
Some conditions are genuinely disabling but harder to document in the way pension medical advisers require. Chronic fatigue syndrome, fibromyalgia, and long COVID fall into this category because their symptoms can fluctuate significantly and may not show up clearly on standard medical tests. This doesn’t mean they can’t qualify, but applications for these conditions tend to benefit from detailed symptom diaries, functional assessments, and specialist reports that go beyond a simple diagnosis to describe the day-to-day reality of living with the condition.
Similarly, conditions that are episodic, like epilepsy, Crohn’s disease, or bipolar disorder, require evidence showing that even between episodes, the frequency and unpredictability of flare-ups makes sustained employment unrealistic. A single letter from your GP stating your diagnosis is rarely sufficient for any condition. The strength of your medical evidence, not just the name of your illness, determines the outcome.