With an ageing population, surgical procedures in older patients are becoming increasingly more common. This can pose clinical and ethical dilemmas, during which clinicians need to make complex decisions. In this paper we discuss the importance of assessing mental capacity to assess if the older patient can make his or her own decisions relating to surgery. We also discuss the importance of understanding ethical principles, in order that clinicians can better guide patient's decision-making. In addition, we look at ageism, frailty, and co-morbidities, and their influence on clinician's decisions regarding surgery in older patients. Further to this, we look at the influence of evidence-based medicine on treatment options, and the under representation of older people in clinical trials and the importance of this. Finally, we consider the importance of considered decisions regarding resuscitation, when considering surgical intervention in older patients. We conclude that patient-centred individualised care, considering patients expectations, wishes, and priorities is vital, whilst aiming to improve or maintain quality of life, and minimise risks when able.