In legal practice, “able to work” describes whether an individual has the physical and/or mental capacity to perform work, with or without reasonable adjustments, rather than whether they actually have a job. It commonly arises in employment law, social security/benefits, discrimination, health and safety and insurance disputes.Across England & Wales, Scotland and Northern Ireland, related statutory concepts appear in employment and social security legislation (for example, fitness for work, limited capability for work, capability dismissals, and disability discrimination under the Equality Act 2010 in Great Britain and equivalent Northern Ireland provisions). In Ireland, similar issues arise under employment, equality and social welfare legislation, including “capable of work” assessments.The expression itself is usually a descriptive term used by lawyers, tribunals, medical experts and employers, rather than a precise statutory definition. Whether a person is “able to work” is typically an evidence-based question, relying on medical reports, occupational health, functional assessments and job requirements. It is central to decisions on sick pay, reasonable accommodation, dismissal for ill health or incapability, income protection and personal injury quantum, with broadly consistent usage across the UK and Ireland.