Employees with disabilities are more likely to need time off work — whether for medical appointments, flare-ups of chronic conditions, or recovery from treatment. For UK employers, getting this right isn't just good practice — it's a legal obligation under the Equality Act 2010. Mishandling disability-related absence is one of the most common routes to an employment tribunal, and compensation for disability discrimination is uncapped.
This guide covers everything you need to know: what counts as a disability, how to make reasonable adjustments to leave policies, when to separate disability absence from general sickness, why the Bradford Factor can be dangerous, and how to protect both your employees and your business.
Under the Equality Act 2010, a person has a disability if they have a physical or mental impairment that has a substantial and long-term adverse effect on their ability to carry out normal day-to-day activities.
Let's break that down:
Important: The effect of the impairment must be assessed without treatment. If someone's diabetes is well-controlled with insulin, you still consider how it would affect them without the medication. The only exception is corrected eyesight (glasses or contact lenses).
Some conditions are automatically treated as disabilities without needing to meet the definition above:
In practice, the definition captures far more conditions than many employers realise. Depression, anxiety, ADHD, autism, diabetes, Crohn's disease, fibromyalgia, chronic fatigue syndrome, and many musculoskeletal conditions can all qualify. If you're unsure whether an employee's condition counts, treat it as a disability and make adjustments. It's far safer than guessing wrong.
Section 20 of the Equality Act 2010 imposes a duty on employers to make reasonable adjustmentswhen a provision, criterion, or practice (PCP) puts a disabled employee at a substantial disadvantage compared to non-disabled employees. Your standard leave and absence policies are PCPs — and they can absolutely disadvantage disabled employees.
Reasonable adjustments to leave policies might include:
The word "reasonable" is doing a lot of work here. What's reasonable depends on the size and resources of your business, the cost of the adjustment, how practical it is, and how effective it would be. A large employer with 500 staff will be expected to do more than a small business with 10. But even small employers must show they genuinely considered adjustments — simply saying "we can't afford it" without evidence won't hold up at tribunal.
This is one of the most critical distinctions in UK employment law, and one that many employers get wrong. Disability-related absence and general sickness absence should be tracked and managed separately.
Why? Because treating them identically means your standard absence management procedures — trigger points, warnings, capability reviews — will disproportionately affect disabled employees. That's indirect disability discrimination under the Equality Act.
Practical example: An employee with multiple sclerosis takes 3 days off with a flu bug and 8 days off during an MS relapse. The 3 flu days are general sickness. The 8 MS days are disability-related absence. These should be recorded in separate categories and only the 3 flu days should count towards your standard absence triggers.
The Bradford Factoris a widely used tool for flagging frequent short-term absences. The formula (S × S × D) heavily penalises employees with multiple short absences — exactly the pattern you'd expect from someone with a chronic or fluctuating disability.
Applying the Bradford Factor to disability-related absence is extremely risky.Here's why:
Best practice is clear: exclude all disability-related absence from Bradford Factor calculations. Track it separately, manage it through your reasonable adjustments process, and never use it as grounds for disciplinary action.
This is one of the key limitations of the Bradford Factor that ACAS and employment lawyers consistently highlight. If you use it, you must build in exceptions for disability-related absence, pregnancy-related absence, and any other protected category.
An occupational health (OH) referral is one of the most valuable tools available to employers managing disability-related absence. OH professionals can provide a medical assessment that's specifically focused on the employee's ability to work — unlike a GP fit note, which deals with general fitness.
When to refer to occupational health:
What to include in the referral:
Employee consent is required.You cannot force an employee to attend an occupational health appointment, but you can explain that the referral is to support them, not to build a case against them. If they refuse, you can only make decisions based on the information available — note this in writing.
The OH report will typically confirm whether the Equality Act applies, recommend specific adjustments, estimate a return-to-work timeline, and advise on ongoing support. This report is gold dustif you ever face a tribunal claim — it shows you took the employee's condition seriously and sought professional advice.
Access to Workis a UK government scheme that provides grants to cover the extra costs of working with a disability or health condition. Many employers — and employees — don't know it exists, which means significant financial support goes unclaimed.
Access to Work can fund:
The grant is paid to the employer (or the employee if self-employed) and can cover up to £66,000 per yearin support costs. For small employers, there's typically no cost-sharing requirement — the grant covers 100% of approved costs.
How to apply:The employee applies directly through the DWP. They'll need their National Insurance number, workplace details, and information about their condition. An Access to Work assessor will then visit the workplace (or conduct a remote assessment) and recommend support. As an employer, your role is to cooperate with the assessment and implement the funded adjustments.
Practical tip:Proactively tell employees about Access to Work during onboarding or when a disability is disclosed. Many employees don't know they can apply, and the support can dramatically reduce both absence and the cost of adjustments to the employer.
Getting disability-related absence wrong can be extremely expensive. Here are the main tribunal claims you risk:
This is the most common disability discrimination claim related to absence. Under Section 15 of the Equality Act, it is discrimination to treat someone unfavourably because of something arising in consequence of their disability. Absence arising from a disability is the textbook example.
If you give an employee a formal warning, reduce their pay, deny a promotion, or dismiss them because of disability-related absence, that is likely Section 15 discrimination — unless you can show the treatment was a proportionate means of achieving a legitimate aim. This is a high bar to clear.
If you apply the same absence policy to disabled and non-disabled employees without any adjustments, and that policy disadvantages the disabled employee, you've likely failed in your duty to make reasonable adjustments. Typical failures include:
A policy that applies equally to everyone but puts disabled employees at a particular disadvantage can be indirect discrimination. For example, a blanket "three absences in 12 months triggers a formal review" policy disproportionately affects employees with fluctuating conditions.
Unlike unfair dismissal claims (where compensation is capped at the lower of 12 months' pay or £115,115 in 2025/26), disability discrimination compensation has no cap. Awards include:
Awards of £50,000+ for disability discrimination are not uncommon, and six-figure awards occur regularly. The reputational damage and legal costs add to the total impact.
Let's look at how these principles work in practice:
Sarah has clinical depression and takes 2–3 days off every few weeks during depressive episodes. Her Bradford Factor score hits 450. Under your standard policy, this triggers a written warning.
Wrong approach: Issue the written warning based on the Bradford Factor score.
Right approach:Exclude Sarah's depression-related absences from the Bradford Factor. Refer her to occupational health. Discuss reasonable adjustments — perhaps working from home during difficult days, flexible start times to accommodate medication effects, or a temporary reduction in workload. Record all discussions and adjustments offered.
James has Type 1 diabetes. He needs time off for quarterly hospital appointments and occasionally has days where his blood sugar levels make it unsafe to drive to work.
Wrong approach: Require James to use annual leave for hospital appointments and count his diabetes-related sick days in the same pot as general sickness.
Right approach: Allow James paid time off for diabetes-related medical appointments as a reasonable adjustment. Track his diabetes-related absences separately from general sickness. Consider whether working from home on difficult blood sugar days is feasible. Tell James about the Access to Work scheme.
Priya has chronic back pain that qualifies as a disability. She has had 15 days off over 5 separate absences in the last 6 months. Her manager wants to start a capability procedure.
Wrong approach: Begin capability proceedings based on total absence figures.
Right approach:Separate Priya's disability-related absences from any general sickness. Refer to occupational health for advice on adjustments — perhaps an ergonomic workstation assessment, a standing desk, or permission to work from home during flare-ups. Apply for Access to Work funding for equipment. Only consider capability proceedings if, after all reasonable adjustments are in place, the absence level remains unsustainable — and even then, seek legal advice first.
Your absence management policyshould explicitly address disability-related absence. Here's what to include:
Key point:Don't wait until you have an employee with a disability to write this policy. Having it in place before issues arise demonstrates good faith and makes it much easier to respond quickly and consistently.
Your absence policy is only as good as the managers who implement it. Front-line managers are the ones having return-to-work conversations, deciding whether to escalate absence concerns, and making day-to-day decisions about adjustments. If they don't understand disability law, they can inadvertently create tribunal risk.
At a minimum, train managers on:
One of the biggest practical challenges in managing disability-related absence is keeping it separate from general sicknessin your records. When everything is lumped together in a spreadsheet or a basic HR system, it's easy for disability-related absence to trigger standard absence management processes — creating exactly the discrimination risk you're trying to avoid.
LeaveManager solves this by giving you the tools to manage disability-related absence properly:
Getting the admin right isn't glamorous, but it's the foundation of legal compliance. When disability-related absence is tracked separately, your managers get accurate data, your Bradford Factor scores are fair, and you have the evidence to show a tribunal that you took your obligations seriously.