Can You Be Dismissed While on Sick Leave
Yes. Being on sick leave does not automatically protect you from dismissal. However, the fact that you are on sick leave significantly changes what a fair dismissal process requires, and many dismissals that occur during sick leave are procedurally unfair or connected to disability discrimination -- which is a separate and uncapped claim.
The critical question is not whether your employer can dismiss you while you are off sick, but whether the reason for the dismissal is fair and whether the process they followed was fair. Both must be present for the dismissal to be lawful.
The Most Common Reasons for Dismissal During Sick Leave
Long-term sickness absence is the most common context. If you have been off sick for an extended period and your employer has concluded that you are unlikely to return to work within a reasonable time, they may dismiss you on grounds of capability -- specifically, ill health capability. This is potentially a fair reason. However, the procedure required to make it fair is demanding.
What a Fair Ill Health Dismissal Requires
Before dismissing for long-term sickness, your employer must obtain up-to-date medical evidence about your condition, prognosis, and likely return to work date. They cannot rely on assumptions. They must consult with you genuinely -- not just inform you of their decision. They must consider whether reasonable adjustments could facilitate your return, particularly where your condition amounts to a disability under the Equality Act 2010. They must consider alternative roles within the organisation. Only after taking these steps, and concluding that there is no reasonable prospect of return within a reasonable time and no reasonable adjustments available, can they fairly dismiss.
A dismissal that skips any of these steps is procedurally unfair. A dismissal that is not supported by medical evidence, that does not genuinely consult the employee, or that fails to consider reasonable adjustments is likely to be unfair at tribunal.
Dismissal During a Planned Phased Return
If you are in the process of a phased or planned return to work and your employer dismisses you during that process -- particularly without the medical evidence and consultation required -- the dismissal is very difficult to justify. A tribunal will scrutinise heavily any dismissal that occurs at a point when a return to work was actively being arranged.
The Disability Discrimination Angle
If your sickness absence is related to a condition that amounts to a disability under the Equality Act 2010 -- a physical or mental impairment that has a substantial and long-term adverse effect on your ability to carry out normal day-to-day activities -- your employer has a duty to make reasonable adjustments to facilitate your return. A failure to make reasonable adjustments is a separate claim from unfair dismissal, it is uncapped, and it does not require two years service. Consider this alongside any unfair dismissal claim. Many conditions qualify as disabilities that employees do not realise are covered: depression, anxiety, chronic pain conditions, cancer, diabetes, and many others.
Dismissal During Short-Term Sick Leave
If you have been off sick for a short period -- days or a few weeks -- and are dismissed during that absence, the employer's justification is much harder to establish. A dismissal that occurs while you are on sick leave of a week or two is very likely to be procedurally unfair unless there is an entirely separate reason for it that has nothing to do with the absence.
Your Time Limit
Whether you are claiming unfair dismissal, disability discrimination, or both, contact ACAS within three months less one day of your dismissal date. If your condition amounts to a disability, your discrimination claim is uncapped and available from day one of employment. Contact ACAS at acas.org.uk immediately.